publicationDate stringlengths 10 10 | abstract stringlengths 0 37.3k | title stringlengths 1 5.74k | doi stringlengths 11 47 ⌀ |
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2021-08-01 | Considering the complexity geometry and thin wall feature, the semiconical shell workpiece will induce complicated and intense vibration in the milling process leading to poor surface quality and large machining deformation. In order to suppress the vibration, this paper focused on the semiconical shell workpiece and p... | Milling vibration control of semiconical shell workpiece with multiple distribution tuned mass dampers | 10.1007/s00170-020-06427-y |
2021-08-01 | In this study, a new hybrid energy dissipation device is developed by combining two friction dampers (auxiliary and main fuse) in series to be used for the seismic control of two different earthquake intensities. Compared with the conventional friction dampers, the new hybrid damper has an advantage in that only the au... | A New Hybrid Friction Damper (HFD) for Dual-Level Performance of Steel Structures | 10.1007/s13296-021-00507-9 |
2021-07-20 | Steel eccentrically braced frame systems (EBF) with buckling restraint braces are extensively used as a lateral load resisting system due to their high-energy dissipation characterized by the inelastic shear deformation of the short links. In performance-based seismic design of such structural systems using the direct ... | Equivalent viscous damping for steel eccentrically braced frame structures with buckling restraint braces | 10.1007/s41062-021-00503-2 |
2021-07-19 | We consider a damped plate model with rotational forces in a bounded domain. The plate is either clamped or hinged. The rotational forces and damping involve the spectral fractional Laplacian with powers $$\theta $$ θ in [0, 1] and $$\delta $$ δ in [0, 2], respectively. Using the frequency domain approach, and appropri... | Regularity and stability for a plate model involving fractional rotational forces and damping | 10.1007/s00033-021-01589-5 |
2021-07-13 | We estimate the ultimate bound of the energy of the solutions to the equation $$\begin{aligned}u''(t)+ Au(t)+g(u'(t))=f(t),\;\; t\ge 0, \end{aligned}$$ u ′ ′ ( t ) + A u ( t ) + g ( u ′ ( t ) ) = f ( t ) , t ≥ 0 , where A is a positive selfadjoint operator on a Hilbert space H , g is a nonlinear damping operator and f... | Ultimate bound of solutions to second-order evolution equation with nonlinear damping term | 10.1007/s42985-021-00110-x |
2021-07-13 | This paper investigates the generalized Zakharov–Kuznetsov (GZK) equation and generalized modified Zakharov–Kuznetsov equation in the presence of external periodic forcing term together with damping. An approximate analytical solution is obtained by employing the direct assumption technique. The framework staged here r... | Approximate Analytical Solutions of Generalized Zakharov–Kuznetsov and Generalized Modified Zakharov–Kuznetsov Equations | 10.1007/s40819-021-01034-1 |
2021-07-10 | The object of this paper is to study a sixth-order Boussinesq equation with dispersive, linear strong damping and nonlinear source by using potential well methods, including the following aspects: firstly, the local well-posedness of the solutions is studied; secondly, the global existence and the finite time blow-up c... | Well-Posedness of Solutions for the Sixth-Order Boussinesq Equation with Linear Strong Damping and Nonlinear Source | 10.1007/s00332-021-09730-4 |
2021-07-01 | A Langevin equation is suggested to describe a system driven by correlated Gaussian white noise as well as with positive and negative damping demarcated by a critical velocity. The equation can be transformed into the Fokker–Planck equation by the Kramers–Moyal expansion. The solution of this equation exhibits some non... | Non-equilibrium diffusion in a particle system and the correspondence to understanding the propagation of public opinion | 10.1007/s11071-021-06597-8 |
2021-07-01 | Abstract— The problem of active suppression of vibrations of an elastic panel moving longitudinally in an ideal fluid flow is considered. The dynamics equation of the panel includes the fluid response and external mechanical action that serves to implement the damping process. The conditions of extremality of lateral v... | ON THE OPTIMAL METHODS OF DAMPING HYDROELASTIC VIBRATIONS | 10.3103/S0025654421040038 |
2021-07-01 | Background Nowadays, vibration control is one of the limitless and major operating parameters in science and technology. The most promising and adaptive dynamic vibration absorber (DVA) with an air spring–air damper assembly is designed with a facility to change the spring rate and damping in the system to control the ... | Mathematical Modeling and Experimental Evaluation of an Air Spring–Air Damper Dynamic Vibration Absorber | 10.1007/s42417-020-00263-w |
2021-07-01 | Particle dampers show a huge potential to reduce undesired vibrations in technical applications even under harsh environmental conditions. However, their energy dissipation depends on many effects on the micro- and macroscopic scale, which are not fully understood yet. This paper aims toward the development of design r... | Toward a design methodology for particle dampers by analyzing their energy dissipation | 10.1007/s40571-020-00363-0 |
2021-07-01 | Anecessary requirement for automatic excitation regulation systems is ensuring the stability of the electric energy systems (EES) and the required quality of the transients (TP) of changes in operating parameters under the effect of various disturbances. In order to improve the damping of TEES, various stabilization ch... | Analysis of the Functioning of Automatic Synchronous Generator Excitation Regulators with Various Input Signals of Frequency Stabilization Channels in the Certification Scheme^1 | 10.1007/s10749-021-01355-7 |
2021-07-01 | A longitudinal and transversal vibrations of the beam with nonlinear tension, a viscoelastic damping and distributed delay term is studied. Using the Faedo–Galerkin method, the well-posedness of the problem is established. A uniform decay result is proved by multiplier method. | Existence and energy decay of solution to a nonlinear viscoelastic two-dimensional beam with a delay | 10.1007/s11045-021-00766-z |
2021-07-01 | In this paper, the initial-boundary value problem of the original three-dimensional compressible Euler equations with (or without) time-dependent damping is considered. By considering a functional $$F(t,\alpha ,f)$$ F ( t , α , f ) weighted by a general time-dependent parameter function $$\alpha $$ α and a general radi... | The Lifespan of Classical Solutions to the (Damped) Compressible Euler Equations | 10.1007/s40840-020-01036-0 |
2021-07-01 | A spring-damping contact force model considering the normal friction force is proposed and discussed in this paper. This model is an extension and development of Hertz theoretical model. The physical model of contact force in the contact process is established. The friction force during the elastic compression and rest... | A spring-damping contact force model considering normal friction for impact analysis | 10.1007/s11071-021-06660-4 |
2021-07-01 | Most of the dynamic systems are inherently nonlinear either with stiffness nonlinearity or with damping nonlinearity. Presence of nonlinearity often leads to characteristic behaviours in response such as jump phenomenon, limit cycle and super-harmonic resonances. Such behviours can be accurately predicted only if the n... | Identification and Parameter Estimation of Asymmetric Nonlinear Damping in a Single-Degree-of-Freedom System Using Volterra Series | 10.1007/s42417-020-00266-7 |
2021-07-01 | A nonlinear vibration isolator with quasi-zero-stiffness (QZS) is designed inspired by the bi-stable Miura-origami tube. The isolator comprises a negative stiffness element with four rods and one horizontal spring, while a vertical linear spring is used to provide positive stiffness. The static characteristics of the n... | A nonlinear vibration isolator with quasi-zero-stiffness inspired by Miura-origami tube | 10.1007/s11071-021-06650-6 |
2021-07-01 | By using the reductive perturbation technique, the nonlinear dust ion-acoustic solitary wave models of the damped Korteweg–de Vries (D-KdV) and modified damped Korteweg–de Vries (D-mKdV) equations are formulated. We constructed the more general and new solitary wave solutions of nonlinear damped KdV and damped mKdV equ... | Ion-acoustic solitary wave solutions of nonlinear damped Korteweg–de Vries and damped modified Korteweg–de Vries dynamical equations | 10.1007/s12648-019-01645-x |
2021-07-01 | Anomalous diffusion is a widespread physical phenomenon, and numerical methods of fractional diffusion models are of important scientific significance and engineering application value. For time fractional diffusion-wave equation with damping, a difference (ASC-N, alternating segment Crank-Nicolson) scheme with intrins... | A Difference Scheme with Intrinsic Parallelism for Fractional Diffusion-wave Equation with Damping | 10.1007/s10255-021-1015-y |
2021-07-01 | Abstract— When two anisotropic rough surfaces contact, the interface is shown as the contact anisotropy or contact isotropy, which closely relates to the asperity contact azimuthal angles on the microscopic scale. The interfacial contact anisotropy/isotropy will influence the normal contact stiffness and damping of mec... | The Modeling for the Normal Contact Stiffness and Damping of Anisotropic Interface | 10.3103/S0025654421040063 |
2021-07-01 | A new system for damping longitudinal transport loads based on a special shock-absorbing dry-friction turnstiles is proposed. The aim of this work is to evaluate the efficiency of longitudinal shock absorbers during the rail transportation of heavy and oversized cargos. An extreme dynamic loading of a transport system ... | Dynamic Processes in a Mechanical System with Shock-Absorbing Cargo-Securing Devices with Dry Friction | 10.1007/s10778-021-01097-z |
2021-07-01 | Introduction Vibration suspension system is used in the automobiles to mitigate the excitations that can come from the travel over various road profiles. The conventionally used suspension systems are linear devices that are effective against high frequencies; however, they have limitations in isolation ability in the ... | Nonlinear Vibration Control Device for a Vehicle Suspension Using Negative Stiffness Mechanism | 10.1007/s42417-020-00275-6 |
2021-07-01 | A new type of negative stiffness friction damping device (NSFDD) was developed in this study, which can solve the problem of poor energy dissipation of the existing passive negative stiffness damping device. The friction force is generated by squeezing the friction plate with the preloaded nitrogen spring vertically. W... | Development and Analysis of Negative Stiffness Friction Damping Device | 10.1007/s12205-021-1282-4 |
2021-07-01 | Background For the continuous operation of the power plant and to prevent any economic or fatal damages, the torsional vibration control of the large turbo-generator rotor is required. Compared to the flow mode dampers, the shear mode magnetorheological fluid dampers are less efficient in regulating the torsional vibra... | Numerical Investigation of Semi-active Torsional Vibration Control of Heavy Turbo-generator Rotor using Magnetorheological Fluid Dampers | 10.1007/s42417-020-00276-5 |
2021-06-30 | Brittleness is an inherent shortcoming of epoxy resin which results in the longitudinal fatigue cracking of mixtures during the long service time of orthotropic steel deck bridges. In this paper, this problem was addressed by introducing a reactive thermoplastic elastomer, epoxidized styrene–butadiene–styrene copolymer... | Improving toughness of epoxy asphalt binder with reactive epoxidized SBS | 10.1617/s11527-021-01744-4 |
2021-06-25 | The stabilization properties of dissipative Timoshenko systems have been attracted the attention and efforts of researchers over the years. In the past 20 years, the studies in this scenario distinguished primarily by the nature of the coupling and the type or strength of damping. Particularly, under the premise that t... | The optimal decay rates for viscoelastic Timoshenko type system in the light of the second spectrum of frequency | 10.1007/s00033-021-01574-y |
2021-06-25 | The weight transfer is continuously excited by brake pressure changes during braking with activated ABS. For this reason, the wheel load oscillations become more severe with activated ABS, which makes difficult the manipulation of brake pressure due to wheel slip oscillations and wheel acceleration changes which are co... | A novel approach on improvement of the dynamic wheel load oscillations by integrating suspension system into ABS during braking with ABS | 10.1007/s40430-021-02961-2 |
2021-06-25 | Particle damping is a promising damping technique for a variety of technical applications. However, their non-linear behavior and multitude of influence parameters, hinder currently its wide practical use. So far, most researchers focus either on determining the energy dissipation inside the damper or on the overall da... | Damping prediction of particle dampers for structures under forced vibration using effective fields | 10.1007/s10035-021-01128-z |
2021-06-08 | We investigate the longitudinal and transversal vibrations of the viscoelastic beam with nonlinear tension and nonlinear delay term under the general decay rate for relaxation function. The existence theorem is proved by the Faedo–Galerkin method and using suitable Lyapunov functional to establish the general decay res... | Existence and general decay of solution for nonlinear viscoelastic two-dimensional beam with a nonlinear delay | 10.1007/s11587-021-00598-w |
2021-06-02 | The dynamic performance of a high-speed machine tool spindle primarily depends on the rigidity between the spindle-holder couplings. The machining stability of such system is determined by the rigidity at the tapered portion of the coupled joints. This paper presents a methodology to evaluate tool-tip frequency respons... | Identification of practical spindle-tool interface parameters using an optimization based statistical approach | 10.1007/s12046-021-01635-y |
2021-06-01 | In this article we investigate the global existence as well as long-term dynamics for a wide class of lattice plate equations on the entire integer set with nonlinear damping driven by infinite-dimensional nonlinear noise. The well-posedness of the system is established for a class of nonlinear drift functions of polyn... | Long-Time Dynamics of Stochastic Lattice Plate Equations with Nonlinear Noise and Damping | 10.1007/s10884-020-09830-x |
2021-06-01 | The nonlinear modes of a non-conservative nonlinear system are sometimes referred to as damped nonlinear normal modes (dNNMs). Because of the non-conservative characteristics, the dNNMs are no longer periodic. To compute non-periodic dNNMs using classic methods for periodic problems, two concepts have been developed in... | Comparison of different methodologies for the computation of damped nonlinear normal modes and resonance prediction of systems with non-conservative nonlinearities | 10.1007/s11071-021-06567-0 |
2021-06-01 | This paper is devoted to study the asymptotic behavior of a binary mixture problem of solids with fractional damping and sources terms. We prove the existence of global attractors with finite fractal dimension and the existence of exponential attractors. Moreover, we prove the upper-semicontinuity of global attractors ... | Existence and Upper-Semicontinuity of Global Attractors for Binary Mixtures Solids with Fractional Damping | 10.1007/s00245-019-09590-1 |
2021-06-01 | With the presence of internal interfaces such as the austenite–martensite interface and the internal twin boundaries in the martensite, shape memory alloys (SMAs) can be employed in passive/active damping applications. Due to the latent heat of transformation, a temperature rise/drop during a load/unload cycle is expec... | Unraveling Frequency Effects in Shape Memory Alloys: NiTi and FeMnAlNi | 10.1007/s40830-021-00335-0 |
2021-06-01 | In this paper, the possibility of using fine scrap tyre rubber to improve the mechanical properties of soil subjected to cyclic loading is addressed. Ground rubber (0.1–0.8 mm) in various proportions (0, 9, 33% and 100% by weight) was mixed with a uniform river sand and a lean clay. Cyclic triaxial tests with bender el... | Cyclic and Dynamic Behavior of Sand–Rubber and Clay–Rubber Mixtures | 10.1007/s10706-021-01704-3 |
2021-06-01 | We study the asymptotic behavior of Timoshenko systems with a fractional operator in the memory term depending on a parameter $$\theta \in [0,1]$$ θ ∈ [ 0 , 1 ] and acting only on one equation of the system. Considering exponentially decreasing kernels, we find exact decay rates. To be precise, we show that for $$\thet... | Stability Results for a Timoshenko System with a Fractional Operator in the Memory | 10.1007/s00245-019-09587-w |
2021-06-01 | In this article, we study the solutions of the damped Navier–Stokes equation with the Navier slip boundary condition in a bounded domain $$\Omega $$ Ω in $${\mathbb {R}}^3$$ R 3 with sufficiently smooth boundary. We employ the Galerkin method to approximate the solutions of the damped Navier–Stokes equations with the N... | Existence and uniqueness of solutions to the damped Navier–Stokes equations with Navier boundary conditions for three dimensional incompressible fluid | 10.1007/s12190-020-01437-1 |
2021-06-01 | A nonlinear mathematical model is developed in the time domain to simulate the behaviour of two identical flexibly mounted cylinders in tandem while undergoing vortex-induced vibration (VIV). Subsequently, the model is validated and modified against experimental results. Placing an array of bluff bodies in proximity fr... | On the development of a nonlinear time-domain numerical method for describing vortex-induced vibration and wake interference of two cylinders using experimental results | 10.1007/s11071-021-06527-8 |
2021-06-01 | In this paper, we consider the stabilization for the Kirchhoff plate and equations connected by transmission conditions. We show that the energy of the transmission system is stable with logarithmic decay rate when feedback control acts on the small part of the plate as a viscoelastic material with Kelvin–Voigt constit... | Stabilization of transmission system of Kirchhoff plate and wave equations with a localized Kelvin–Voigt damping | 10.1007/s00028-021-00682-6 |
2021-06-01 | The aim of this paper is to study the theoretical and numerical stability of the Bresse system in one-dimensional bounded domain with viscoelastic Kelvin–Voigt damping. We first showed the well posedness of the system. Then stability is obtained by applying the multiplicative techniques. Later a numerical scheme is pro... | On the Stabilization of the Bresse Beam with Kelvin–Voigt Damping | 10.1007/s00245-019-09611-z |
2021-06-01 | The present article attempts to study the propagation of surface seismic waves (Stoneley waves) in the layered structure composed of rock and ice medium. The interface between the two media (ice and rock) is considered to be frictional. Mathematical model of the present problem is formulated by adapting the Coulomb fri... | Modelling of Stoneley wave transference at the frictional interface between ice and rock medium | 10.1007/s00419-021-01894-5 |
2021-06-01 | Stochastic flexural vibrations of small-scale Bernoulli–Euler beams with external damping are investigated by stress-driven nonlocal mechanics. Damping effects are simulated considering viscous interactions between beam and surrounding environment. Loadings are modeled by accounting for their random nature. Such a dyna... | Random vibrations of stress-driven nonlocal beams with external damping | 10.1007/s11012-020-01181-7 |
2021-06-01 | Wide-area damping controllers (WADCs) are effective means of improving the damping of inter-area oscillations and thereby ensuring a secure operation of modern highly stressed interconnected power systems; however, their implementation costs are high. Therefore, the controller must be well configured and designed to en... | Performance of wide-area power system stabilizers during major system upsets: investigation and proposal of solutions | 10.1007/s00202-020-01168-3 |
2021-06-01 | Conventional tuned liquid column dampers (TLCDs) are deficient in multidirectionality. In contrast, toroidal TLCDs are designed to extend the application to multidirectional vibration control. This article employs real-time hybrid simulation (RTHS) to experimentally investigate the nonlinear damping effects of toroidal... | Experimental comparison of nonlinear damping performance of toroidal and conventional tuned liquid column dampers | 10.1007/s11071-021-06552-7 |
2021-06-01 | Abstract In this study, the molecular dynamics method was used to study the damping mechanism in Mg alloys at the atomic scale. The energy dissipated by the nucleation and motion of dislocations and by defects friction, and the effect of defects, such as vacancies, cracks, and grain boundaries, on them were studied. Th... | Dislocation Damping and Defect Friction Damping in Magnesium: Molecular Dynamics Study | 10.1007/s12540-019-00566-y |
2021-06-01 | In the present work, the quality factor (and thermoelastic damping) of a microbeam resonator is analyzed by employing the three-phase-lag thermoelasticity theory with memory-dependent derivative. We compare our results with different heat conduction models. An explicit formula of thermoelastic damping has been derived,... | Analysis of the quality factor of micromechanical resonators using memory-dependent derivative under different models | 10.1007/s00419-021-01920-6 |
2021-06-01 | The characterization of mechanical vibrations in a hammer forging process is a tremendously important parameter for machine design and production engineering. The dynamic response of a forging hammer to the reaction forces is affected by material behaviour, time, spring-damper system and foundation. In this research fi... | Theoretical and experimental investigations of mechanical vibrations of hot hammer forging | 10.1007/s00170-021-07061-y |
2021-06-01 | Hybrid materials combining steel or cast iron with fibre or particle composites have a good potential for lightweight machine tool structural design with high damping ratio. These materials are analyzed in the paper with a focus on damping improvement of structural components and machine tool assemblies. Fibre composit... | On passive damping in machine tool hybrid structural parts | 10.1007/s00170-021-06865-2 |
2021-06-01 | We establish the global well-posedness of a strong solution to the 3D tropical climate model with damping. We prove that there exists the global and unique solution for α, β, γ satisfying one of the following three conditions: (1) α, β ⩾ 4; (2) 7/2 ⩽ α < 4, β ⩾ (5 α + 7)/(2 α ), γ ⩾ 7/(2 α − 5); (3) 3 < α ⩽ 7/2, β, γ ⩾... | Global strong solution of 3D tropical climate model with damping | 10.1007/s11464-021-0933-6 |
2021-06-01 | This paper investigates the application of the robust control strategy for reducing structural vibrations using the hybrid protective system in the presence of network abnormalities. It focuses on the design of sliding mode control using a novel sliding variable and modified reaching law approach in the presence of tim... | Design of sliding mode control for structural vibration system with time-varying transmission delays | 10.1007/s40435-020-00697-w |
2021-05-31 | The clutch is an important component of the vehicle driveline system. One of its major functions is to attenuate or eliminate the torsional vibration and noise of the driveline system caused by the engine. Based on experiments of vibration damping under different vehicle conditions, the structure and functional princip... | Design and Performance Study of Clutch Disc Assembly of Wide-Angle, Large-Hysteresis, Multistage Damper | 10.1186/s10033-021-00572-5 |
2021-05-24 | In this paper, we investigate the stabilization of a linear Bresse system with one discontinuous local internal viscoelastic damping of Kelvin–Voigt type acting on the axial force, under fully Dirichlet boundary conditions. First, using a general criteria of Arendt–Batty, we prove the strong stability of our system. Fi... | On the stability of Bresse system with one discontinuous local internal Kelvin–Voigt damping on the axial force | 10.1007/s00033-021-01558-y |
2021-05-22 | This paper studies the damped Schrödinger equation $$\begin{aligned} i\dot{u} +\Delta u+(I_\alpha *|u|^p)|u|^{p-2}u+ia(t)u+ib|u|^{2(q-1)}u+ic\frac{u}{|u|^\beta }+id (-\Delta )^su=0. \end{aligned}$$ i u ˙ + Δ u + ( I α ∗ | u | p ) | u | p - 2 u + i a ( t ) u + i b | u | 2 ( q - 1 ) u + i c u | u | β + i d ( - Δ ) s u = ... | On damped non-linear Choquard equations | 10.1007/s40590-021-00359-7 |
2021-05-06 | In engineering applications, composite structures supported by elastic foundations are being vastly utilized in various operating environmental conditions. The nonlinear hygrothermal effect on vibration analysis of a magnetostrictive viscoelastic laminated composite sandwich plate rested on two-parameter Pasternak’s fo... | Nonlinear hygrothermal effects on the vibrations of a magnetostrictive viscoelastic laminated sandwich plate resting on an elastic medium | 10.1007/s43452-021-00230-6 |
2021-05-04 | In this paper, we show the global existence of classical solutions to the incompressible elastodynamics equations with a damping mechanism on the stress tensor in dimension three for sufficiently small initial data on periodic boxes, that is, with periodic boundary conditions. The approach is based on a time-weighted e... | Global classical solutions to the elastodynamic equations with damping | 10.1186/s13660-021-02608-9 |
2021-05-01 | The stiffness and damping modeling of joint surfaces are important for analyzing the dynamic characteristics of bolted joints, which has a great influence on the working precision of the machine tool. In this paper, a damping model is presented to predict the tangential damping of the joint accurately. The fractal theo... | Tangential Damping Model of Bolted Joint with the Physics-Based Friction Coefficient | 10.1007/s12541-021-00485-2 |
2021-05-01 | For a real polynomial p ( s ) = a _ n s ^ n + ⋯ + a _1 s + a _0, its characteristic ratios are defined by $${\alpha _i}: = {{a_i^2} \mathord{\left/{\vphantom {{a_i^2} {{a_{i - 1}}{a_{i + 1}}}}} \right.\kern-\nulldelimiterspace} {{a_{i - 1}}{a_{i + 1}}}}$$ α i : = a i 2 / a i − 1 a i + 1 for i = 1, 2, ⋯, n −1, and the g... | Characteristic Ratio Symmetric Polynomials and Their Root Characteristics | 10.1007/s12555-019-1086-1 |
2021-05-01 | This paper is concerned with the Boussinesq system with a damping term and the homogeneous Dirichlet boundary conditions in 3D bounded domains. For a certain range of parameters, we prove that the weak solution is unique if the temperature belongs to $$L^{\infty }(0,T;L^{3}(\Omega ))$$ L ∞ ( 0 , T ; L 3 ( Ω ) ) . Also,... | Uniqueness and regularity for the 3D Boussinesq system with damping | 10.1007/s11565-020-00351-5 |
2021-05-01 | We propose the application of a resonant shunt to wheels to reduce the high-frequency wheel noise generated by railway vehicles. High-frequency wheel noise is caused by the resonance of wheels owing to contact between rails and wheels. A resonant shunt is applied at specific frequencies to reduce wheel resonance. In th... | Reduction in High-Frequency Wheel Noise/Vibration of Railway Vehicles Using Piezoelectric Shunt | 10.1007/s40684-020-00294-4 |
2021-05-01 | Aiming at the reduction of low-frequency noise for large equipment, a damping optimization method based on the Operational Mode Analysis (OMA) is proposed. Due to the stability of the mode frequencies and shapes, damping application could make efficient noise reduction without bringing new problems compared with struct... | A Damping Optimization Method Based on the Operational Mode Analysis for Low-Frequency Noise Reduction | 10.1007/s11182-021-02306-5 |
2021-05-01 | In order to avoid the complexity of obtaining the sensitivity in the usual optimal flow with small signal stability, which is easily result from the mere consideration of active power output optimization or the change of element model, a new model is proposed to improve the small-signal stability of the system by const... | OPF Calculation with Small-Signal Trajectory Constraints | 10.1007/s42835-021-00689-6 |
2021-05-01 | In this work, near fully dense NiTi components have been fabricated using a 55.2Ni-Ti (wt.%) powder through selective laser beam melting. The effect of the manufacturing process on mechanical and functional properties of the selected NiTi alloy has been systematically investigated by tuning the hatching distance, h , a... | Towards an understanding of the functional properties of NiTi produced by powder bed fusion | 10.1007/s40964-020-00155-1 |
2021-05-01 | We deal with the Cauchy problem of three-dimensional incompressible magneto-micropolar fluid equations with a nonlinear damping term $$\alpha |{\mathbf {u}}|^{\beta -1}{\mathbf {u}}\ (\alpha >0\ \text {and}\ \beta \ge 1)$$ α | u | β - 1 u ( α > 0 and β ≥ 1 ) in the momentum equations. By cancelation properties of the s... | Global Regularity of Three-Dimensional Incompressible Magneto-Micropolar Fluid Equations with Damping | 10.1007/s40840-020-01021-7 |
2021-05-01 | A new tuned vibration absorber (TVA) based on one degree-of-freedom (1DOF) of translational motion is proposed. The absorber mass takes the shape of a tank filled with fluid. This device is attached to the fluid circulating system which plays a role in changing the absorber mass. It fills the tank or drains it dependin... | A New Tuned Vibration Absorber Based on One-Degree-of-Freedom of Translational Motion | 10.1007/s10778-021-01088-0 |
2021-05-01 | Rectangular flat-bottom liquid tanks known as tuned liquid dampers (TLDs) are often used as passive mechanical dampers. Sloped- and triangular-bottom TLDs have been reported to be more effective than flat-bottom TLDs, but optimum tuning and damping of sloped- and triangular-bottom TLDs have not yet been proposed, and n... | Modeling and design of a tuned liquid damper using triangular-bottom tank by a concentrated mass model | 10.1007/s11071-021-06433-z |
2021-05-01 | Structural materials and their properties in different applications with next-generation composite production techniques are quite promising areas. In this study, new composite blocks were produced with the addition of industrial and recycled steel fibers to high strength cementitious composites (HSCCs). The vibrationa... | Influence of Steel Fiber Addition on the Vibrational Characteristic of High Strength Cementitious Composites | 10.1007/s13369-020-05096-z |
2021-05-01 | This current research dealing the effect of adding high stiffness carbon fibre along with E-glass fibre and addition of nano-silica particles as a toughening agent in epoxy resin. The main aim of this research is to improve the damping, storage modulus and fatigue behaviour of glass-epoxy composite by using carbon fibr... | Low Velocity Impact, Fatigue and Visco-elastic Behaviour of Carbon/E-glass Intra-ply fibre-Reinforced Nano-silica Toughened Epoxy Composite | 10.1007/s12633-020-00566-3 |
2021-05-01 | We discuss the possibility of connecting Bateman’s approach to the concept of maximal acceleration in quantum theory. We show that if such a correlation exists, for very large acceleration or for very large time, waves propagate in atemporal space. This suggests that string theory is a limiting case of an underlying th... | String propagation in space without time through an association between damping and maximal acceleration | 10.1007/s40509-021-00242-0 |
2021-05-01 | The article describes for the first time a method for determining the logarithmic decrements of damping of natural frequency oscillations of the arch-gravity dam of the Sayano-Shushenskaya Hydropower Plant based on engineering seismometric observations. The experimental and calculated results of damping decrements are ... | Determination of the Logarithmic Decrement of Damping of Natural Frequency Oscillations of the Sayano-Shushenskaya Hydropower Plant Dam Based on Engineering Seismometric Observations | 10.1007/s10749-021-01318-y |
2021-05-01 | A series of silica mesoporous molecular sieves SBA-15 with a 7.7 ± 0.8 nm pore diameter, the surface of which is hydrophobized with methylsilyl groups, and polymethylsiloxane derivatives with a 1.6 ± 0.8 nm pore diameter were obtained. These sieves are characterized by X-ray phase analysis, adsorption of nitrogen at 77... | Influence of the Structure of Hydrophobic Porous Silica Materials of SBA-15 Type and Polymethylsiloxane Derivatives on the Value of Water Intrusion Pressure | 10.1007/s11237-021-09682-6 |
2021-04-13 | Measuring viscoelastic properties of soft tissues becomes a new biomarker in the medical diagnosis field. It can help in early diagnosis and related fields, such as minimally-invasive-surgery (MIS) applications and cell mechanics. The current work presents a tactile sensor for measuring the damping coefficient of the s... | Determination of damping coefficient of soft tissues using piezoelectric transducer | 10.1007/s10544-021-00558-z |
2021-04-07 | Exponential integrators based on discrete gradient methods are applied to non-canonical Hamiltonian systems with added linear forcing/damping terms, which may be time-dependent. Changes in the dynamics, such as conservation of energy or Casimirs, which result from inclusion of the linear forcing/damping terms, are not ... | Exponential Integrators Based on Discrete Gradients for Linearly Damped/Driven Poisson Systems | 10.1007/s10915-021-01468-1 |
2021-04-01 | Abstract— The critical functional part of any high performance resonance based sensor is a mechanical resonator. The performance is measured by resonator quality factor ( Q -factor). Damping mechanisms such as thermoelastic damping (TED), anchor loss, surface loss, material internal friction, fluid damping and electron... | Design to Operational Parameters Dependency on Quality Factor of Sensor Mechanical Resonators | 10.1134/S207510872102005X |
2021-04-01 | The vortex-induced vibration may lead to a premature failure of hydraulic mechanical systems, especially under the resonance condition in the torsional mode. To predict the structural fatigue life, a careful consideration of the dynamic response to the hydraulic excitations is essential in the design phase. This study ... | Numerical studies of the hydrodynamic damping of a vibrating hydrofoil in torsional mode | 10.1007/s42241-021-0019-7 |
2021-04-01 | This paper presents a novel method for determination of location and tuning of parameters of electronic static synchronous compensator (E-STATCOM) for oscillation control in Wide area monitored power systems. The effect of active and reactive power injection by E-STATCOM, on the damping performance of a two-area interc... | Improvement of Oscillatory Stability in Wide Area Controlled Systems Using Power Injection | 10.1007/s11277-020-07800-6 |
2021-04-01 | The upper bound on the degrees of irreducible Darboux polynomials associated to the ordinary differential equations x t t + ε x t 2 + η x t + f ( x ) = 0 $ x_{tt}+\varepsilon {x_{t}}^{2}+\eta x_{t}+f(x)=0 $ with f ( x ) ∈ ℂ [ x ] ∖ ℂ $ f(x)\in \mathbb {C}[x]\setminus \mathbb {C} $ and ε ≠ 0 is derived. The availability... | Liouvillian Integrability and the Poincaré Problem for Nonlinear Oscillators with Quadratic Damping and Polynomial Forces | 10.1007/s10883-020-09513-2 |
2021-04-01 | A modification of the homotopy perturbation method is suggested with three effective expansions to solve a nonlinear oscillator with damping terms to expand the solution, the frequency and the amplitude. The Duffing equation with linear damping is used as an example to illustrate the simple solution process and effecti... | Homotopy perturbation method with three expansions | 10.1007/s10910-021-01237-3 |
2021-04-01 | In this study, a nanoscale beam of transversely isotropic thermoelastic (TIT) medium with two temperature and with Green–Naghdi (GN) III theory of thermoelasticity for free vibrations with simply supported boundaries have been examined. Euler–Bernoulli (EB) beam theory is used to formulate a mathematical model of the n... | Study of frequency shift and thermoelastic damping in transversely isotropic nano-beam with GN III theory and two temperature | 10.1007/s00419-020-01848-3 |
2021-04-01 | The parametric instability of a rotor system with electromechanically coupled boundary conditions under periodic axial loads is studied. Based on the current flowing piezoelectric shunt damping technique, the detailed rotor model is established by the finite element (FE) method. In the matrix assembly procedure, a nove... | Stability analysis of a rotor system with electromechanically coupled boundary conditions under periodic axial load | 10.1007/s11071-021-06339-w |
2021-04-01 | In this article, the damping forced harmonic vibration characteristics of magneto-electro-viscoelastic (MEV) nanobeam embedded in viscoelastic foundation is evaluated based on nonlocal strain gradient elasticity theory. The viscoelastic foundation consists of Winkler–Pasternak layer. The governing equations of nonlocal... | Chaotic dynamics and forced harmonic vibration analysis of magneto-electro-viscoelastic multiscale composite nanobeam | 10.1007/s00366-019-00865-3 |
2021-04-01 | Owing to limited rigidity and wall thickness, the machining of thin-walled components leads to chatter, poor surface quality, and low productivity. It is well-acknowledged that end-mill geometry and cutting conditions have a significant influence on the process stability of thin-walled parts. In order to reduce the mil... | Study the effect of anti-vibration edge length on process stability of milling thin-walled Ti-6Al-4V alloy | 10.1007/s00170-021-06781-5 |
2021-04-01 | A novel boring bar was developed for chatter reduction of machining processes. By proposing an internal frictional damping structure, additional energy dissipation during bending vibrations was imposed to the boring bar. The structure consisted of some pins longitudinally press-fitted inside the boring bar. This struct... | Development of a frictionally damped boring bar for chatter suppression in boring process | 10.1007/s00170-021-06791-3 |
2021-04-01 | Species specific hydrodynamic characterization is essential for assessing the suitability of various types of mangroves in coastal protection as the dissipation of wave energy within the mangroves is governed primarily by various aspects which are specific to the species to which they belong. In the present study a spe... | Laboratory investigations on wave attenuation characteristics of Rhizophora Mucronata poir using physical models with bottom friction | 10.1007/s10652-020-09777-z |
2021-04-01 | The Xihoumen Bridge, with a main span of 1650 m and two side spans of 578 m and 485 m, respectively, is a long-span suspension bridge spanning the Jintang and Cezi islands in Zhejiang Province, China. In order to establish a reference baseline for vibration mitigation and condition assessment of the bridge under typhoo... | Monitoring-based evaluation of dynamic characteristics of a long span suspension bridge under typhoons | 10.1007/s13349-020-00458-5 |
2021-04-01 | This paper focuses on the performance-based seismic design (PBSD) methodology of multi-story concentrically braced frames (CBFs) equipped with a novel brace, i.e., the shape memory alloy (SMA)-friction damping brace (SMAFDB). The fundamental response characteristics of the framing structure are first understood through... | Performance-based seismic design of multi-story CBFs equipped with SMA-friction damping braces | 10.1007/s10518-021-01060-w |
2021-04-01 | Suspension bridges due to their long span are susceptible against dynamic events, like air flow which can cause considerable problems for them. Flutter, as an aerodynamic phenomenon, makes bridges vibrate, whereas their amplitude gradually diverges, needed the vibration control strategies. Tuned mass damper or in brief... | Flutter Control of Long Span Suspension Bridges in Time Domain Using Optimized TMD | 10.1007/s13296-021-00469-y |
2021-04-01 | This article explores that the study on bending of magneto-electric-elastic nanobeams relies on nonlocal elasticity theory. The Vlasov’s model foundation utilizes the silica aerogel foundation. The guiding expressions of nonlocal nanobeams in the considered framework are used extensively and where parabolic third-order... | Magneto-electro-elastic analysis of piezoelectric–flexoelectric nanobeams rested on silica aerogel foundation | 10.1007/s00366-019-00869-z |
2021-04-01 | Untreated and treated jute fiber and nano-clay in various ratios were used to fabricate jute/nano-clay/epoxy hybrid composites through compression molding method. The dynamic mechanical and free vibration behaviours were evaluated by varying the concentration of NaOH (2.5%, 5% and 7.5%) and wt.% of nano-clay (1, 3, 5 a... | Dynamic Mechanical Properties and Free Vibration Characteristics of Surface Modified Jute Fiber/Nano-Clay Reinforced Epoxy Composites | 10.1007/s10924-020-01945-y |
2021-04-01 | This paper aims to improve the use of continuous wavelet transform (CWT) to identify the damping parameters from the free decay responses of structures. Numerical response functions (impulse response functions) were simulated with lower frequencies and higher damping parameters using the Hilbert Transform, and the damp... | Analysis of Center Frequency Effect on Damping Parameters Estimation Using Continuous Wavelet Transform | 10.1007/s12205-021-1255-7 |
2021-04-01 | Among the different functional properties provided by shape memory alloys (SMA), the damping attracted increasing interest in the last decades. Particularly, the exploitation of pseudo-elastic properties to damp or prevent the oscillations of physical systems has received wide attention in civil engineering. In this co... | Internal Friction Parameter in Shape Memory Alloys: Correlation Between Thermomechanical Conditions and Damping Properties in NiTi and NiTiCu at Different Temperatures | 10.1007/s11665-021-05609-3 |
2021-04-01 | Seismic modeling of massive structures requires special caution, as wave propagation effects significantly affect the responses. This becomes more crucial when the path-dependent behavior of the material is considered. The coexistence of these conditions renders numerical earthquake analysis of concrete dams challengin... | Effect of seismic wave propagation in massed medium on rate-dependent anisotropic damage growth in concrete gravity dams | 10.1007/s11709-021-0694-z |
2021-04-01 | In order to study the mechanical property degradation rule of Q690 high-strength steel in the ocean wave splash area, the rusted specimen is obtained by indoor damp heat surrounding soaking environment corrosion test. The scanning electron microscopy, uniaxial tensile and cyclic loading tests of corroded steel are perf... | Experimental Study on Mechanical Properties of Q690 High Strength Steel in Marine Corrosive Environment | 10.1007/s13296-021-00468-z |
2021-04-01 | Retrofitting buildings in densely populated areas with a soft story configuration on the first floor can pose a daunting challenge to the community. Against this backdrop, this study set out to evaluate the seismic retrofit strategy's adequacy in enhancing the seismic performance of buildings with a soft story. The pro... | Numerical Investigation of Energy Dissipation Device to Improve Seismic Response of Existing Steel Buildings with Soft-First-Story | 10.1007/s13296-021-00466-1 |
2021-04-01 | We studied a new implicit method of order three based on two off-step points for the numerical solution of second-order nonlinear initial-value problems $$y^{\prime\prime} = f(t,y,y^{\prime}),\;y(t_{0} ) = \gamma_{0}$$ y ″ = f ( t , y , y ′ ) , y ( t 0 ) = γ 0 , $$y^{\prime}(t_{0} ) = \gamma_{1}$$ y ′ ( t 0 ) = γ 1 on ... | Absolute stability of an implicit method based on third-order off-step discretization for the initial-value problem on a graded mesh | 10.1007/s00366-019-00857-3 |
2021-03-28 | During an earthquake, adjacent buildings with insufficient separations often collide into each imposing unexpected impact loading on buildings causing severe damage and even collapse of many buildings. In the present study, the passive control of closely spaced fixed base structures is investigated under the effects of... | Performance of Linear and Nonlinear damper connected buildings under blast and seismic excitations | 10.1007/s41062-021-00502-3 |
2021-03-26 | The paper deals with the numerical solution of 2D wave propagation exterior problems including viscous and material damping coefficients and equipped by Neumann boundary condition, hence modeling the hard scattering of damped waves. The differential problem, which includes, besides diffusion, advection and reaction ter... | Energetic boundary element method for accurate solution of damped waves hard scattering problems | 10.1007/s10665-021-10100-y |
2021-03-23 | This work considers a mathematical model describing a dynamic frictional contact between a viscoelastic body and an adhesive foundation. The contact is modeled with normal damped response condition associated with a new version of Coulomb’s law of dry friction with adhesion introducing a new term which gives a better t... | Dynamic Contact Problem with Normal Damped Response, Friction and Adhesion | 10.1007/s00009-021-01740-6 |
2021-03-22 | This paper presents a general methodology for the analysis and synthesis of a positive semi-definite system described by mass, damping and stiffness matrices that is often encountered in impedance control in robotics research. This general methodology utilizes the fundamental kinematic concept of rigid-body and non-rig... | Analytical methodology for the analysis of vibration for unconstrained discrete systems and applications to impedance control of redundant robots | 10.1186/s40648-021-00199-0 |
2021-03-20 | The present work is aimed at deriving a finite element model for active constraining layer damping treatment (ACLD) of layered skew plates by incorporating zig-zag behaviour using a Murakami zig-zag function (MZZF). The ACLD in skew patch form comprises of 1–3 PZC material and viscoelastic material in the layer form pl... | Smart damping of skew composite plates using Murakami zig-zag function | 10.1007/s42452-021-04426-6 |
2021-03-18 | In this paper, we consider a variable coefficient thermo-viscoelastic-coupled system of second sound with acoustic boundary conditions, where the heat conduction is given by Cattaneo’s law. We establish a general decay of energy-associated solutions under a class of generality of the relaxation function. Our result ext... | New general stability for a variable coefficient thermo-viscoelastic-coupled system of second sound with acoustic boundary conditions | 10.1007/s40314-021-01459-w |
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