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2022-02-20 | Wave-particle interaction (WPI) is one of the most fundamental processes in plasma physics in which one most prominent example is the Landau damping. Owing to its excellent energy-exchange mechanism, the WPI has gained increasing interest not only from theoretical points of view, but also its many important application... | Wave-particle interactions in quantum plasmas | 10.1007/s41614-022-00063-7 |
2022-02-17 | Aging is a phenomenon that affects the strength parameters of soil. This paper aimed to examine the time-dependent behavior of static and dynamic parameters of sands stored under natural conditions using static and cyclic simple shear tests. The goal was to better understand the effects of aging on shear modulus, dampi... | Impact of natural environment on sand aging under static and dynamic conditions | 10.1007/s10035-022-01208-8 |
2022-02-12 | The existence of pullback attractors is proved for the MHD equations with damping terms $$|u|^{\alpha -1}u$$ | u | α - 1 u and $$|B|^{\beta -1}B$$ | B | β - 1 B $$(\alpha ,\beta \geqslant 1)$$ ( α , β ⩾ 1 ) on a bounded domain $$\Omega \subset {\mathbb {R}}^{3}$$ Ω ⊂ R 3 . Based on the well-posedness of the strong solu... | Pullback attractors for 3D MHD equations with damping | 10.1007/s00033-022-01687-y |
2022-02-11 | This paper is devoted to the energy decay estimates for the coupled wave-plate system with local frictional damping in a bounded domain. The frictional damping distributes in the plate or wave domain. When the frictional damping is only acting through the plate equation, the transmission system is showed not to be expo... | Stability of Transmission Wave-Plate Equations with Local Indirect Damping | 10.1007/s10440-022-00471-4 |
2022-02-10 | Thermoelastic damping is defined as a significant intrinsic dissipative mechanism which represents the loss of energy of micro-/nano-mechanical resonators. It remarkably affects the quality performance of the resonators. It is a very strenuous task to fabricate a resonator of good quality type so that its thermoelastic... | Non-local effect on quality factor of micro-mechanical resonator under the purview of three-phase-lag thermoelasticity with memory-dependent derivative | 10.1007/s00339-022-05322-5 |
2022-02-10 | The Lorentz–Maxwell model of dispersion of light has been analysed in this paper to determine the damping coefficient of the electrons in optically transparent glasses at the true resonance frequency in the ultraviolet region where glass is opaque. For this, we needed the refractive indices of glass in the optical freq... | Determination of the damping coefficient of electrons in optically transparent glasses at the ultraviolet absorption region | 10.1007/s12043-021-02290-y |
2022-02-02 | This article deals with an initial and boundary value problem to the following damped wave equation: u t t − Δ u − ω Δ u t + μ u t = | u | p − 2 u $$ u_{tt}-\Delta u-\omega \Delta u_{t}+\mu u_{t}=|u|^{p-2}u $$ in a bounded domain. An energy decay estimate for the solutions when ω ≥ 0 $\omega \geq 0$ and μ > − ω λ 1 $\m... | Decay Estimate and Blow-up for a Damped Wave Equation with Supercritical Sources | 10.1007/s10440-022-00469-y |
2022-02-01 | Background Particle damping materials convert the kinetic energy of the system into other forms of energy through friction and collision between particles and between the particles and container wall. Gear transmission is advancing toward higher speeds, heavier loads, and lower noise. Purpose In order to reduce the vib... | Effect of Particle Friction Coefficient on Vibration Reduction in Gear Transmission | 10.1007/s42417-021-00402-x |
2022-02-01 | Damping is known to have a considerable influence on the dynamic behavior of bridges. The fixed damping ratios recommended in design codes do not necessarily represent the complicated damping characteristics of bridge structures. This study investigated the application of stress-dependent damping associated with vehicl... | Numerical analysis of vehicle-bridge coupling vibration concerning nonlinear stress-dependent damping | 10.1007/s11709-021-0804-y |
2022-02-01 | Abstract— The rotation of a thin elastic disk around its axis is considered. It is assumed that the disk is rigidly fixed in the center and performs small transverse vibrations described in the framework of the membrane model. To suppress vibrations, the flexible disk is subjected to external mechanical stress. The vib... | DAMPING THE TRANSVERSE VIBRATIONS OF A RAPIDLY ROTATING DISC | 10.3103/S0025654422010010 |
2022-02-01 | We consider the Benjamin–Ono equation on the torus with an additional damping term on the smallest Fourier modes ( $$\cos $$ cos and $$\sin $$ sin ). We first prove global well-posedness of this equation in $$L^2_{r,0}(\mathbb {T})$$ L r , 0 2 ( T ) . Then, we describe the weak limit points of the trajectories in $$L^2... | Long time behavior of solutions for a damped Benjamin–Ono equation | 10.1007/s00209-021-02849-w |
2022-02-01 | We are concerned with a transmission problem for the Kirchhoff plate equation where one small part of the domain is made of a viscoelastic material with the Kelvin-Voigt constitutive relation. We obtain the logarithmic stabilization result (explicit energy decay rate), as well as the wellposedness, for the transmission... | Logarithmic stabilization of the Kirchhoff plate transmission system with locally distributed Kelvin-Voigt damping | 10.21136/AM.2021.0104-20 |
2022-02-01 | In dieser Arbeit wird untersucht, wie das Dämpfungsvermögen bei auftretenden Netzpendelungen durch den kombinierten Einsatz von Regelstrategien bei Wasserkraftwerken verbessert werden kann. Zuerst wird auf die regelungstechnischen Herausforderungen bei Wasserkraftwerken, wie den hydraulischen Druckstoß, eingegangen. An... | Damping of inter-area oscillations by combining control strategies in hydropower plants | 10.1007/s00502-021-00935-9 |
2022-02-01 | This paper proposes the stiffness nonlinearities and asymmetric SD (smooth and discontinuous) oscillator under time-delayed feedback control with the fractional derivative damping. With the effect of displacement and velocity feedback, the oscillator can be adjusted to the desired vibration state, and then the stochast... | The effect of fractional damping and time-delayed feedback on the stochastic resonance of asymmetric SD oscillator | 10.1007/s11071-021-07105-8 |
2022-02-01 | The wide-area damping controllers showed to be effective in improving the damping ratio of the low-frequency oscillation modes. This controller requires remotes signals sent by Phasor Measurement Units located in different positions of the power system and, then, these signals are highly susceptible to communication ti... | Design of a wide-area damping controller to tolerate permanent communication failure and time delay uncertainties | 10.1007/s12667-020-00416-6 |
2022-02-01 | Studied are the hysteretic force–deformation response of large-scale nonlinear viscous dampers and model of the response for use in numerical simulations and seismic design. The force–deformation response of nonlinear viscous dampers with a force capacity of 600 kN are characterized under sinusoidal loading. A wide ran... | Modeling of nonlinear viscous damper response for analysis and design of earthquake-resistant building structures | 10.1007/s10518-021-01306-7 |
2022-02-01 | Nonlinear Quasi-zero-stiffness (QZS) vibration isolation systems with linear damping cannot lead to displacement isolation with different excitation levels. In this study, a QZS system with nonlinear hysteretic damping is investigated. The Duffing-Ueda equation with a coupling nonlinear parameter $$\eta$$ η is proposed... | Dynamic analysis and experiment of Quasi-zero-stiffness system with nonlinear hysteretic damping | 10.1007/s11071-021-07136-1 |
2022-02-01 | Abstract A new model of damped vibrations of an oscillator based on the use of the mathematical apparatus of fractional integro-differentiation with an exponential-power function of dynamic memory is considered. Using the Wright function, the exact solution of the equation of motion of the oscillator is obtained. Theor... | A Fractional Oscillator with an Exponential-Power Memory Function | 10.1134/S1063785022020055 |
2022-02-01 | Thermoelastic damping is a significant energy dissipation mechanism in nano-resonator, and exploring its feature would lay a foundation for designing high-quality nano-resonators. Due to the size-dependent effect and the non-Fourier heat conduction effect arising in structures in nanoscales, the traditional models may ... | Thermoelastic Damping Analysis to Nano-resonators Utilizing the Modified Couple Stress Theory and the Memory-Dependent Heat Conduction Model | 10.1007/s42417-021-00401-y |
2022-02-01 | This paper investigates the nonlinear dynamic behavior of a nonlocal functionally graded Euler–Bernoulli beam resting on a fractional visco-Pasternak foundation and subjected to harmonic loads. The proposed model captures both, nonlocal parameter considering the elastic stress gradient field and a material length scale... | Nonlinear vibration of a nonlocal functionally graded beam on fractional visco-Pasternak foundation | 10.1007/s11071-021-07081-z |
2022-02-01 | Objectives This paper characterizes how joint stiffness and damping parameters for a bolted cantilevered beam change with different number of bolts, different tightening torques on each, and with different levels of torsional excitations. Such characterization is unaddressed in the literature and is our modest contribu... | Identifying Joint Dynamics in Bolted Cantilevered Systems Under Varying Tightening Torques and Torsional Excitations | 10.1007/s42417-021-00386-8 |
2022-02-01 | A multi-pad bearing profile incorporated with innovative adjustable mechanism capable of controlling the dynamic behaviour of rotor bearing system is analysed in this study. The film thickness variation occurring under pad displaced conditions are accurately predicted by utilising the developed film thickness equation.... | Stability performance of an adjustable multi-pad fluid film bearing profile under load-between-pad orientations | 10.1007/s40435-021-00818-z |
2022-02-01 | Ordinary buckling-restrained braces have a single-yielding core. A buckling-restrained brace (BRB) with three parallel yielding cores and different yield strengths is, however, introduced in this paper that will expectedly exhibit an improved seismic behavior. The new BRB was constructed using three-yielding steel core... | Seismic Performance of Three-core Buckling-Restrained Braces An Experimental Investigation | 10.1007/s40996-021-00606-x |
2022-02-01 | In light of the vast potential for the application of modern energy absorption systems in the structures, the effectiveness of each system should be tested, analyzed, and proved before convincing the structures design companies to use them. In this research, the effectiveness of applying base isolators, viscous and fri... | Study on Modern Energy Absorption Systems in Structures Subjected to Earthquake Forces | 10.1007/s40996-021-00677-w |
2022-02-01 | Background Squeeze Film Damper plays an important role in enhancing the dynamic stability of the rotor and damping rotor vibrations and transmitted forces when traversing critical speeds. Depending on how SFD is designed, SFD can reduce the vibration and transmission forces of the rotating system and it can have the op... | Optimization Design Analysis of the Eccentric Rotor System with SFD | 10.1007/s42417-021-00406-7 |
2022-02-01 | Purpose This paper deals with the parametrically excited vibrations and mode transitions of a nonlinear damped triple-well oscillator in detail. The multiple timescale structure of the triple-well oscillator with resonant frequency is revealed. We present the correct predictions of the region of parameter space where t... | Parametrically Excited Vibrations in a Nonlinear Damped Triple-Well Oscillator with Resonant Frequency | 10.1007/s42417-021-00408-5 |
2022-02-01 | One of the devices for passive structural control is the tuned mass damper (TMD) which consists of a mass, spring, and damping. The seismic behavior of structures equipped with tuned mass dampers is influenced by the value of damper components. Generally, the determination of TMD parameters to achieve optimal seismic b... | A comparison of deterministic and reliability-based optimization of tuned mass damper under uncertainties | 10.1007/s42107-022-00418-y |
2022-02-01 | Retrofitting is a technique wherein the damaged structure is strengthened to original design requirements. During 2001 Bhuj earthquake in Gujarat, India many open ground storey building damaged. So there is an urgent need for retrofitting of damaged buildings. This calls for techniques that are technically sound and ec... | Development of Retrofitting Technique for Seismically Vulnerable Open Ground Storey Reinforced Concrete Buildings | 10.1007/s40799-021-00456-2 |
2022-02-01 | Due to the significant effect of porosity on the mechanical response of functionally graded (FG) structures, this paper presents a comprehensive model to investigate the vibration response of FG porous thick beam under the dynamic sine pulse load including the damping effect by using adopted finite element model, for t... | Dynamic analysis of viscoelastic functionally graded porous thick beams under pulse load | 10.1007/s00366-020-01070-3 |
2022-01-31 | Particle damping technology has been widely used in many fields to absorb the structural vibration due to its good damping effects in normal gravity environments. However, particle dampers (PDs) become less useful in weightless environments because of their structure and damping mechanism, which limits their applicatio... | Study on Damping Behavior of Electromagnetic Particle Dampers with a Ferromagnetic End Cover in Weightless Environments | 10.1007/s12217-022-09930-x |
2022-01-30 | In this note, we mainly consider the trajectory attractors of the three-dimensional micropolar fluids with damping. Due to the existence of weak solutions, the existence of trajectory attractors for 3D micropolar fluids with damping term is proved for $$1\le \beta <\frac{7}{3}$$ 1 ≤ β < 7 3 with $$\sigma >0$$ σ > 0 . | Trajectory Attractors of the 3D Micropolar Equations with Damping Term | 10.1007/s00009-021-01965-5 |
2022-01-29 | In practice, principal stress rotation is a common phenomenon triggered by dynamic loading. Determining the dynamic deformation characteristics of frozen soil is extremely important for designing a structure with considering principal stress rotation under multiaxial loading conditions. In this study, cyclic rotational... | Dynamic deformation characteristics of frozen clay under pure principal stress rotation | 10.1007/s12517-022-09572-8 |
2022-01-29 | Gas oil-contaminated lands are one of the main issues and concerns in the field of geoenvironmental engineering. This research has conducted studies on the dynamic properties, in particular, on two parameters of damping ratio and shear modulus of fine-grained soils contaminated with gas oil (gas oil plays a greater rol... | Effect of gas oil contamination on dynamic geotechnical properties of clay–sand mixtures | 10.1007/s12517-022-09515-3 |
2022-01-28 | This paper discusses a passive vibration control method to improve the shock tolerance of hard disk drives (HDDs) in operating condition (op-shock tolerance). Past works in improving the HDDs’ op-shock tolerance includes (i) parking the head when shock is detected, (ii) installing a lift-off limiter, (iii) structural m... | Polymer-based dampening layer application to improve the operating shock tolerance of hard disk drive | 10.1186/s44147-021-00062-4 |
2022-01-24 | In this paper, we consider a nonlinear coupled Kirchhoff system with viscoelastic damping and a distributed delay. We established a general stability result, where an exponential result in the literature is only a particular case. We illustrate the stability result with some examples. | A general stability result for a nonlinear viscoelastic coupled Kirchhoff system with distributed delay | 10.1007/s13370-021-00947-w |
2022-01-24 | Under-platform dampers (UPDs) are traditionally used in aircraft engines to reduce the risk of high cycle fatigue. By introducing friction in the system, vibrations at resonance are damped. However, UDPs are also the source of nonlinear behaviours making the analysis and the design of such components complex. The shape... | Topology optimisation of friction under-platform dampers using moving morphable components and the efficient global optimization algorithm | 10.1007/s00158-021-03158-w |
2022-01-24 | The present study deals with the primary damped natural frequency of dielectric composite beam reinforced with graphene platelet (GPL). The beam is subjected to pre-stress in the longitudinal direction and external electrical loading throughout the beam thickness direction for tuning the frequency characteristics. The ... | Primary nonlinear damped natural frequency of dielectric composite beam reinforced with graphene platelets (GPLs) | 10.1007/s43452-021-00369-2 |
2022-01-24 | Background Detection of locally increased blood concentration and perfusion is critical for assessment of functional cortical activity as well as diagnosis of conditions such as intracerebral hemorrhage (ICH). Current paradigms for assessment of regional blood concentration in the brain rely on computed tomography (CT)... | Development of computational models for microtesla-level magnetic brain scanning: a novel avenue for device development | 10.1186/s42490-022-00058-y |
2022-01-19 | We introduce a unitary operator which may be constructed conveniently by exploiting the properties of the Glauber displacement and parity operators. We show that it can be considered as a constant of motion of a quantum system including pure dephasing interaction of a central qubit with a nano-mechanical resonator. Usi... | Entanglement dynamics of a nano-mechanical resonator coupled to a central qubit | 10.1007/s11128-021-03372-x |
2022-01-19 | In this paper, we investigate the exponential stability of an Euler-Bernoulli beam system with distributed damping subjected to a time-delay in the boundary. At first, applying the semigroup theory of bounded linear operators we prove the well posedness of the system. And then we give the exponential stability analysis... | Stabilization of an Euler-Bernoulli Beam with Distributed Damping Under Time Delays in the Boundary | 10.1007/s10440-022-00466-1 |
2022-01-11 | Forced vertical vibration tests were carried out in the field on 5.8 m long driven single steel pipe pile with external and internal diameter of 0.166 m and 0.154 m. Tests were conducted on single on 2 × 2 group piles under a static load ( W _ s ) of 15 kN. The field test results include the determination of frequency-... | Vertical nonlinear response of single and 2 × 2 group pile under strong harmonic excitation | 10.1007/s12046-021-01789-9 |
2022-01-04 | The A.D. 1803 and 1934 Bihar-Nepal border earthquake affected Indo-Gangetic Plain with evidences of liquefaction in cities like Patna, Varanasi, Agra, and Delhi in historical past. Recent strong shaking all along the Indo-Gangetic Plains and seismic induced damage to the buildings in Bihar during M_w 7.8 Gorkha earthqu... | Cyclic behavior of late quaternary alluvial soil along Indo-Gangetic Plain: Northern India | 10.1186/s40703-021-00167-y |
2022-01-01 | Polymer materials are being used in several mechanical and aerospace engineering applications. However, their applications to high-performance components and structures, in particular, those operating under dynamic loadings and service conditions are still limited. To overcome this limitation, their mechanical properti... | Characterization of the Dynamic Response of CNT-Reinforced-Polymer-Composite (CNTRPC) Materials Based on a Multiscale Approach | 10.1007/978-3-030-91346-5_25 |
2022-01-01 | Damping is a phenomenon that can be observed in connection with all kind of materials: solid, liquid, or gaseous. Any kind of time-dependent change in stresses or strains of the material results in a loss of mechanical energy, which in most cases is transformed into thermal energy. However, all the other mechanisms suc... | Damping of Materials and Structures | 10.1007/978-1-4614-4547-0_19 |
2022-01-01 | The present chapter is devoted to the investigation of the nonlinear dynamics of DNA molecules in the helicoidal Peyrard-Bishop DNA model with long-range interactions. The power law long-range interactions with distance dependence $$|l|^{-s}$$ on the elastic coupling constant between different DNA base pair units are c... | Nonlinear Dynamics of DNA Chain with Long-Range Interactions | 10.1007/978-981-19-5323-1_4 |
2022-01-01 | In this chapter, the steady-state and transient responses of systems are presented. Most of the input signals to systems have arbitrary amplitude and it is difficult to characterize the response of the systems. Therefore, the response of the systems is determined for some standard signals, which is sufficient for the d... | Steady-State and Transient Responses | 10.1007/978-3-030-98445-8_6 |
2022-01-01 | The present study focuses on variation of dynamic properties of soils with change in stress path. Cyclic triaxial test, which is the most common laboratory test used to evaluate the dynamic properties of soils, suffers several limitations. Two major limitations are its inability to introduce continuous rotation of prin... | Dynamic Properties of Soils—A Stress Path Approach | 10.1007/978-981-16-5669-9_14 |
2022-01-01 | This chapter features discussions of the effects of cone mass, suspension/box compliance, and damping on the fundamental low-frequency resonance and the Q and bandwidth of that resonance. The analytical results are also closely correlated with precision lab measurements and the factors of electromagnetic and overall sy... | Resonance, Q, and Measurements | 10.1007/978-3-030-91634-3_14 |
2022-01-01 | The controller tuning is first described in time, Laplace , and frequency domains. There are empirical methods based on settability of plants without building mathematical models of the plant such as methods of Ziegler / Nichols , Strejc , Chien/Hrones/Reswick , Kuhn , and Latzel . Then follow methods based upon integr... | Controller Tuning | 10.1007/978-3-031-13483-8_3 |
2022-01-01 | The article provides a brief classification of electromechanical dampers in vehicle suspensions. As investigated version of design of electromechanical shock absorber is suggested model with ball-screw drive of generator as investigated version of design of electromechanical shock absorber. The main components of the d... | Development of a Mathematical Model of Electromechanical Dampers with a Regenerative Effect in Vehicle Wheel Suspensions | 10.1007/978-3-030-85230-6_23 |
2022-01-01 | In this chapter, the modeling, controller design, and stability analysis of islanded microgrid using enhanced hierarchical control structure with multiple current loop damping schemes are proposed. And then, a small-signal model for the primary and secondary controls with additional phase-shift loop is presented, and t... | Enhanced Hierarchical Control for Islanded Microgrid Using Advanced Damping Methods | 10.1007/978-3-030-74513-4_8 |
2022-01-01 | A pickup is an example of what an engineer would call a transducer . A transducer is a device that transforms a non-electrical quantity (temperature, strain, pressure, velocity, etc.) into an electrical signal. Of course, here we are interested in converting the vibration of a string into a corresponding electrical sig... | Pickups and Volume and Tone Controls | 10.1007/978-3-031-10758-0_2 |
2022-01-01 | Modern production is impossible without developing and improving lifting and transport mechanisms, which is indispensable for various technological processes. The article concerns the optimal control on the swing mechanism regarding speed and simultaneous damping of load oscillations. It is shown that the law of change... | Control Optimization of the Swing Mechanism | 10.1007/978-3-030-91327-4_2 |
2022-01-01 | The basics of the dynamics of the closed loop control (CLC) are described in a compact way according to [16–20] to make it easier to get started with the next chapters on controller setting and management of controllers. The description starts by presenting the single CLC blocks in the time domain as differential equat... | Basics of System Dynamics and Control Theory | 10.1007/978-3-031-13483-8_2 |
2022-01-01 | In this study, phase compensated hydro-turbine governor for stabilizing power system oscillations. As per deregulation in electricity market, much pressures are imparted on optimal use of resources like mechanical turbine governor action. Since mechanical torque control and excitation control of generator are decoupled... | Optimal Compensation of Hydro Governor for Power Oscillation Damping | 10.1007/978-981-16-7076-3_5 |
2022-01-01 | This paper presents a passivity-based control strategy dealing with underactuated two-degree-of-freedom (2-DoF) mechanical systems. Such a methodology, which is based on the interconnection and damping assignment passivity-based control (IDA-PBC), rooted within the port-controlled Hamiltonian framework, can be applied ... | A Constructive Methodology for the IDA-PBC of Underactuated 2-DoF Mechanical Systems with Explicit Solution of PDEs | 10.1007/s12555-020-0839-1 |
2022-01-01 | The paper presents an analysis of force versus displacement characteristics of mechanical, magnetic, and electromagnetic springs. Since electromagnetic spring force can be controlled by altering the current in coil, they can be used for damping the vibrations. New physical model of magnetic springs have been proposed a... | Magnetic and Electromagnetic Springs Forces: Determination and Usage in Damping Vibrations | 10.1007/978-3-030-81166-2_11 |
2022-01-01 | This paper analyzes the dynamic performance of the energy harvesting shock absorber (EHSA), which contains overrun clutch and rack and pinion. The results show that the output force of EHSA is composed of the inertial force and the damping force. The inertial force is produced by the motion of the moving parts of the E... | Dynamic Modeling for a Mechatronic Energy Harvesting Shock Absorber | 10.1007/978-3-030-81170-9_19 |
2022-01-01 | Strapdown Inertial Navigation Systems (SINS) have advantage of simplified construction, modular design, low cost and less life cycle support as compared to navigation systems that employee gimbaled platforms. This paper presents full mathematical modeling and simulation of a typical SINS system starting from modeling o... | SINS Integration with Baro-Inertial Vertical Channel Damping for Error Optimization | 10.1007/978-981-15-8155-7_95 |
2022-01-01 | Preliminary design of piles is performed by considering the static loads, but the final design must include the dynamic loads, especially in earthquake-prone regions. The soil nonlinearity under seismic loading is evaluated using the modulus degradation curves in the total-stress approach. In this study, two different ... | The Effect of Soil Damping on the Soil-Pile-Structure Interaction Analyses in Liquefiable and Non-liquefiable Soils | 10.1007/978-3-031-11898-2_83 |
2022-01-01 | Suspension vibrations occur when a vehicle moves across a rough surface. These vibrations, with vibration frequency equal to that of the suspension, lead to resonance. When resonance occurs, the dynamic loads increase many times over, which may lead to fatigue in the metal elements of the body structure. The use of rub... | Dynamic Damping of Vibrations in the Suspension of Cars | 10.1007/978-3-030-85230-6_38 |
2022-01-01 | We consider asymptotic behaviors of the Vlasov-Poisson system with radiation damping in three space dimensions. For any smooth solution with compact support, we prove a sub-linear growth estimate of its velocity support. As a consequence, we derive some new estimates of the charge densities and the electrostatic field ... | Asymptotic growth bounds for the Vlasov-Poisson system with radiation damping | 10.1007/s10473-022-0104-1 |
2022-01-01 | Impact dampers are passive devices used to attenuate vibrations by means of momentum transfer and dissipation of energy. This paper deals with investigations carried out to evaluate the damping ratio of an impact damper system for case without and with impact ball of same size made of different materials. Finite elemen... | Numerical Simulation of an Impact Damper System by Finite Element Method | 10.1007/978-981-16-4138-1_25 |
2022-01-01 | Resonant Ultrasound Spectroscopy estimates the stiffness coefficients of a material from the free resonant frequencies of a single specimen. It is particularly suitable for complete stiffness characterization of anisotropic materials available only as small samples (typically a few mm), and it does not suffer from some... | Measurement of Cortical Bone Elasticity Tensor with Resonant Ultrasound Spectroscopy | 10.1007/978-3-030-91979-5_12 |
2022-01-01 | In this paper, we consider the following nonlinear viscoelastic wave equation with variable exponents: $$u_{tt}-\Delta u+\int_{0}^{t} g(t-\tau)\Delta u(x,\tau)\rm{d}\tau+\mu u_{t}=\vert u\vert^{p(x)-2}u,$$ u t t − Δ u + ∫ 0 t g ( t − τ ) Δ u ( x , τ ) d τ + μ u t = | u | p ( x ) − 2 u , where μ is a nonnegative constan... | Theoretical and numerical study of the blow up in a nonlinear viscoelastic problem with variable-exponent and arbitrary positive energy | 10.1007/s10473-022-0107-y |
2022-01-01 | An eigenvalue problem for a pair of harmonic functions is considered; it contains a spectral parameter in the Steklov condition on a part of the boundary. This problem concerns eigenvalues of fluid’s free oscillations in a vertical, cylindrical container; its cross-section is arbitrary, whereas a porous medium occupies... | Sloshing in a Vertical Cylinder in the Presence of a Porous Layer | 10.1007/978-3-030-93076-9_19 |
2022-01-01 | Earthquakes are the most disastrous forces which cannot be stopped but their effects can be diminished with minimal causalities. Over the period of time, the seismic design procedure has evolved in many ways. Traditional force-based design cannot be design structure for a particular intended performance objective. The ... | Advancement in Direct Displacement-Based Design: A Review | 10.1007/978-3-031-04793-0_23 |
2022-01-01 | High damping rubber bearings (HDRB) is a useful seismic resistant device that is widely used in buildings due to many outstanding advantages. However, the mechanical characteristics of HDRB are complicated such as temperature-dependent, rate-dependent. This paper is devoted to investigate the low temperature dependence... | Low Temperature Effect on Dynamic Mechanical Behavior of High Damping Rubber Bearings | 10.1007/978-981-16-3239-6_16 |
2022-01-01 | Nonlinear vibration isolation systems with both stiffness and damping nonlinearities are promising for a broad-band and high-efficient isolation performance. In this research, a novel nonlinear isolator is proposed via a compliant mechanism with negative stiffness and wire ropes with hysteretic damping. The compliant m... | Nonlinear vibration isolation via a compliant mechanism and wire ropes | 10.1007/s11071-021-06588-9 |
2022-01-01 | Lightweight composite materials require a healthy combination of mechanical strength, wear resistance, and good damping Damping behavior capacity for purpose of selection and use in engine and structural parts of the industries spanning automobile and aerospace. In this short and succinct paper, the salient aspects of ... | The Damping Capacity and Sliding Wear Behavior of an Aluminum Alloy Metal Matrix Composite: Role of Reinforcement | 10.1007/978-3-030-92567-3_5 |
2022-01-01 | This chapter contains a comprehensive discussion of the forces on the driver’s moving parts (cone and voice coil), including the Lorentz force law (f = Bli), motor resistance and electromagnetic damping, a correlation with Beranek’s classic cone-velocity expression, and relations to the driver power-to-loss ratios pres... | Force | 10.1007/978-3-030-91634-3_10 |
2022-01-01 | When developing lighter structures for space applications, which will allow additional payload as well as increased design freedom, the use of Magnesium–Lithium (Mg–Li)-based alloys has potential benefits over commonly used aluminium (Al) alloys and is investigated here. The effect of age-hardening Age hardening treatm... | Development of Magnesium–Lithium-Based Alloys for Space Applications: The Relationship Between Precipitation Hardening and Damping Capacity | 10.1007/978-3-030-92533-8_13 |
2022-01-01 | Blast-resistant gates are necessary for critical infrastructure, such as embassies, ministries, or parliaments. Lightweight doors/gates equipped with “energy absorbers” have more desirable operational performance than the traditional costly and bulky options. Auxetic damping systems have not yet been used in the suppor... | Auxetic Damping Systems for Blast Vulnerable Structures | 10.1007/978-3-030-60242-0_71 |
2022-01-01 | This article deals with control problems for dynamical systems with non-local convolution type terms. A method is proposed to get conditions under which the moving system will go into complete rest. The force acting on the system is distributed over the entire moving domain. Domains of one, two and three dimensions are... | Vibration Damping Problems for Some Models of Viscous Fluids | 10.1007/978-3-030-79983-0_2 |
2022-01-01 | This chapter presents the theoretical formulation for torsional vibration analysis in internal combustion engines. The methodology can be applied to several crankshaft geometries with different cylinder configurations. The steady-state solution of the equations considers the state transition matrix and the convolution ... | Crankshaft Torsional Vibration Analysis in a Mid-Size Diesel Engine: Simulation and Experimental Validation | 10.1007/978-3-030-91869-9_2 |
2022-01-01 | Passive control systems are practical systems that use the system's energy to absorb its energy to control the dynamic effects on the structure. In the control of these systems, which store energy with the help of a spring and mass, the effect of mass and spring is great. Based on this logic, different types of passive... | Passive Control via Mass Dampers: A Review of State-Of-The-Art Developments | 10.1007/978-3-030-98343-7_2 |
2022-01-01 | The demand for vibrational energy harvesting systems has increased over the past decade. The motivation for the researchers in this area is to decrease the requirement of the external power sources and reduce the maintenance cost. In the present analysis, the energy harvesting capability of a tapered laminated composit... | Parametric Analysis of Tapered Laminated Composite Beam in Piezoelectric Vibration Energy Harvesting | 10.1007/978-981-16-6738-1_52 |
2022-01-01 | The processing route has an influence on the damping capacity, and in this study, the influence of silicon carbide particle (SiCp) size on the damping capacity of AA6061 processed through friction stir processing was investigated. Specimens were extracted from the stir zone and analyzed for their damping properties, an... | Damping Property of AA6061/SiCp Surface Composites Developed through Friction Stir Processing | 10.1007/s11665-021-06201-5 |
2022-01-01 | The introduction of virtual inertia and damping coefficient of the virtual synchronous generator effectively improves the frequency response characteristics of the system. After the microgrid is disturbed by the load, the output power of the system will overshoot and oscillate. According to the relationship between the... | Parameter Adaptive Control of Virtual Synchronous Generator Based on Ant Colony Optimization Fuzzy | 10.1007/978-981-16-9735-7_34 |
2022-01-01 | In this article, we deal with a damped Navier–Stokes equations in $$ I\!\!R^3$$ I R 3 with slip boundary conditions. Sufficient conditions for the existence of the solutions to the Navier–Stokes system are established in a bounded domain $$\varOmega \subset I\!\!R^3.$$ Ω ⊂ I R 3 . Further, we show that the solutions de... | On Generalized Energy Inequality of the Damped Navier–Stokes Equations with Navier Slip Boundary Conditions | 10.1007/978-981-19-9307-7_38 |
2022-01-01 | This work entails an analysis of secondary resonances in the parametrically damped van der Pol equation, with and without external excitation. An application of this system is a vertical-axis wind-turbine blade, which can have cyclic damping, aeroelastic self-excitation, and direct excitation. We analyze the system usi... | Resonances of a Forced van der Pol Equation with Parametric Damping | 10.1007/978-3-030-81162-4_42 |
2022-01-01 | Cartesian impedance control has been widely used in controlling robotic manipulators for manipulation and assembly tasks to compute the required joint torques and/or end-effector forces. Current congruence mapping of the Cartesian stiffness and damping matrices to joint spaces are not valid for general cases. In this p... | Joint Space Stiffness and Damping for Cartesian and Null Space Impedance Control of Redundant Robotic Manipulators | 10.1007/978-3-030-95459-8_25 |
2022-01-01 | This paper presents the concept of the variable admittance network (VAN) with indirect energy supply for semiactively controlled systems and the admittance analysis of three basic VANs with indirect energy supply in resonance vibration control. A mechanical network is describable with the admittance, which includes the... | Variable Admittance Network with Indirect Energy Supply for Semiactive Vibration Control | 10.1007/978-981-16-5912-6_73 |
2022-01-01 | Dynamic response of structures is of extreme importance for the evaluation of seismic behaviour of structures. In vibration analysis, we are generally concerned with damping in terms of system response. The energy absorption devices increase the damping of the structure by plastic deformation or by viscous resistance o... | Numerical Investigation of Visco-Elastic Damper for Seismic Vibration | 10.1007/978-3-030-98335-2_1 |
2022-01-01 | In this work, design a proportional-integral-derivative (PID) controller using direct synthesis method for the control of critical damped second order plus time delay (CDSOPTD) systems. The different categories of CDSOPDT systems are considered based on the ratio of time delay to system time constant. CDSOPTD systems p... | Direct Synthesis Method-Based PID Controller for Critically Damped Time Delay Systems | 10.1007/978-981-16-8550-7_13 |
2022-01-01 | On the night of December 26th, 2018, a strong earthquake, with a magnitude of 4.9 on the Richter scale, hit the southeastern side of the Mt. Etna Volcano (Sicily), with the epicenter between the Municipalities of Viagrande and Trecastagni. The hypocenter of the strong earthquake was located just 1 km deep and, for this... | A Seismic Microzonation Study for Some Areas Around the Mt. Etna Volcano on the East Coast of Sicily, Italy | 10.1007/978-3-031-11898-2_61 |
2022-01-01 | The article constructs differential equations of motion of a gyroscopic rigid unbalanced rotor with nonlinear cubic damping and nonlinear stiffness, taking into account the anisotropy of the linear stiffness of the elastic support material and interaction with a non-ideal DC motor with a linear characteristic, and the ... | Non-stationary Resonance Transition of the Gyroscopic Rigid Rotor with Nonlinear Damping and Non-ideal Energy Source | 10.1007/978-3-031-10776-4_14 |
2022-01-01 | In this study, we proved that damped quadratic nonlinear oscillators similar to Duffing and Helmholtz–Duffing damped equations which emerge in bubble dynamics with time-periodic straining flows and solitary-like wave's dynamics may be derived from a new functional approach based on nonstandard Lagrangians and fractiona... | A new approach to nonlinear quartic oscillators | 10.1007/s00419-021-02062-5 |
2022-01-01 | In this paper, analysis of the nonlinear dynamics responses of a structure equipped with a vehicle suspension that uses a fluid with magneto rheological characteristics to control the possible instability and chaotic motion. It is a spray orchards of tower type, with an unbalanced electric motor (Non-ideal) located at ... | On a Vehicular Suspension for a Non-ideal and Nonlinear Orchard Tower Sprayer Through an Inverted Pendulum Using Reologic Magneto (MR) | 10.1007/978-3-030-96603-4_10 |
2022-01-01 | The aim of this research is to develop an advanced hysteresis model of High Damping Rubber (HDR) bearing. Based on the experimental research so far, various dependences and nonlinearities can be confirmed in the experimental hysteresis curves of HDR. In particular, the gap in the stiffness between the first cycle and t... | Dynamic Analysis of Bridge Pier Considering Hysteresis Characteristics of High Damping Rubber Bearings | 10.1007/978-981-16-6932-3_25 |
2022-01-01 | Friction dampers are commonly used to reduce the vibration amplitude of aircraft turbine blades. However, the shape of such friction dampers can affect significantly damping characteristics and the overall nonlinear dynamic behaviour of the structure. This chapter exploits topological optimisation to identify damper ge... | Topological Optimisation of Friction Dampers for Nonlinear Resonances Mitigation | 10.1007/978-3-030-81166-2_1 |
2022-01-01 | Purpose In this paper, a radically new concept of a Stiff Seismic Base Absorber (SBA) is proposed for seismic protection of multistory building structures. Methods An inerter is first implemented, connecting directly the structure to the ground. This results in the decrease of the natural frequency of the structure, wi... | Feasibility Assessment of Stiff Seismic Base Absorbers | 10.1007/s42417-021-00362-2 |
2022-01-01 | This paper focuses on the effect of optimally damped dynamic vibration absorber (DVA) to attenuate vibration caused by the rotating mass unbalance. The exact solution for DVA damping factor has been determined by using higher-order L’Hospital rule as a function of mass ratio. The effect of exact solution has been compa... | Determination of Exact Optimal Tuning of Dynamic Vibration Absorbers to Control Vibration Due to Rotating Mass Unbalance | 10.1007/978-981-16-4222-7_62 |
2022-01-01 | In actual engineering application, Quasi-zero-stiffness (QZS) vibration isolation systems may not achieve expected low-frequency isolation effect. In this study, a QZS system with nonlinear hysteretic damping was investigated to discuss the reasons for failure of isolation performance. The results indicate there are tw... | Analysis of Dynamic Behavior Affecting the Isolation Effect of the QZS System with Nonlinear Hysteretic Damping | 10.1007/978-981-16-5912-6_24 |
2022-01-01 | Development of low cost, energy efficient cellular communication systems are very essential due to the ubiquitous use of mobile technology. To overcome the scarcity of energy resources, low loss component design in transceivers is an emerging trend and lots of research works are focused on it. RF transceivers can be de... | Energy Dissipation Analysis in Micro/Nanobeam Cantilever Resonators Applying Non-classical Theory | 10.1007/978-981-16-5640-8_41 |
2022-01-01 | Components of the rail tracks are designed to withstand the continuous moving load and transfer it effectively to the subgrade and foundation. Apart from stresses and strains developed, the moving load also induces vibrations, causing damage to components of the rail track, amplifying already existing track defects suc... | Rail Pad Dynamic Properties: A Review | 10.1007/978-981-16-9613-8_6 |
2022-01-01 | We study the stability problem of a tree of elastic strings with local Kelvin–Voigt damping on some of the edges. Under appropriate conditions on the damping coefficients at the vertices, exponential/polynomial stability are proved. This is a new representation of Ammari et al. (Semigroup Forum 100:364–382, 2020), wher... | Stability of a Graph of Strings with Local Kelvin–Voigt Damping | 10.1007/978-3-031-14268-0_6 |
2022-01-01 | BTA deep hole drilling is used to produce bore holes with high bore hole qualities and high length-to-diameter ratios. The tool system consists of a drill head and a drill tube. However, the length of the drill tube required to achieve high drilling depths leads to an increased tendency of the tool system to vibrate. T... | Lightweight FRP Drill Tubes for Vibration Damping in BTA Deep Hole Drilling | 10.1007/978-3-030-78424-9_25 |
2022-01-01 | In this paper, an active structural control method called active tuned mass dampers (ATMDs) was applied to reinforced concrete frame structures. ATMD is positioned on the top of the structure and uses a proportional integral derivative (PID) controller. Both damper and PID controller properties are optimized via an imp... | Control of Reinforced Concrete Frame Structures via Active Tuned Mass Dampers | 10.1007/978-981-19-2948-9_26 |
2022-01-01 | The propagation of dust-acoustic waves in a dusty plasma bounded in finite symmetrical cylindrical geometry has been theoretically investigated. By using the reductive perturbation method, we obtain a quasi-nonlinear Schrödinger equation. It is shown that there is a dark envelope soliton under certain conditions, while... | Damping of dark envelope soliton in a viscous bounded dusty plasma | 10.1007/s12648-020-01965-3 |
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