publicationDate stringlengths 10 10 | abstract stringlengths 0 37.3k | title stringlengths 1 5.74k | doi stringlengths 11 47 ⌀ |
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2020-01-01 | This paper presents a novel two-degree-of-freedom (two-DOF) passive damping system dedicated to the vibration suppression of a dual-axis precision force sensor. The damping system consists of two identical eddy current dampers (ECDs), each of which utilizes a double-layer Halbach-array permanent magnet (PM) structure a... | A Dual-Axis Force Sensor with Passive Eddy Current Damper for Precision Measurement | 10.1007/978-3-030-44267-5_11 |
2020-01-01 | Due to the fact that the vehicle suspension system is complicated, how to identify the structure-borne path of road noise efficiently and accurately is the key point of road noise diagnosis. In this research, a transfer path diagnosis approach for road noise diagnosis is proposed. In terms of methodology, the proposed ... | Diagnosis of Road-Induced Drumming Noise of Passenger Car Based on Multiple Coherence Method | 10.1007/978-981-13-9718-9_57 |
2020-01-01 | In this note, we study a damped plate equation. On the one hand, the action of the damping creates a smoothing effect in Gevrey classes, on the other hand, it dissipates the energy of the solution. | Decay Estimates and Gevrey Smoothing for a Strongly Damped Plate Equation | 10.1007/978-3-030-36138-9_10 |
2020-01-01 | In this present study, the efficiency of the combined circular tuned liquid column ball damper (CTLCBD) and tuned liquid column ball damper (TLCBD) is demonstrated in order to suppress the torsional responses of building, excited by wind. The results from the numerical simulation reveal that combined CTLCBD and TLCBD i... | Vibration Control of Torsionally Coupled Building Using Tuned Liquid Column Ball Damper | 10.1007/978-981-15-5693-7_41 |
2020-01-01 | With an increasing demand for safe and efficient rail transportations with high availability, there is an interest to apply condition based maintenance on railway systems to increase the total system reliability. A condition based maintenance system utilizes data collecting, data processing and decision making to sched... | Condition Monitoring of Rail Vehicle Suspension Elements: A Machine Learning Approach | 10.1007/978-3-030-38077-9_14 |
2020-01-01 | This paper presents the new vibration model of the horizontal washing machine (HWM) using a nonlinear geographic of the suspension system with nonlinear friction force - velocity (F-V) relationship of dampers obtained from experiment. Furthermore, using the dissipated energy function of dampers (Ed) criteria, some resu... | New Vibration Model to Analyze the Correlation of Components in the Washing Machine Suspension System | 10.1007/978-3-030-37497-6_58 |
2020-01-01 | In engines, torsional vibration is inevitably caused by the fluctuation of the engine torque. Therefore, the establishment of torsional vibration damper is the necessary measure to diminish the torsional vibration. In this paper, an experimental study was carried out in a gasoline engine to analyze the bolt tightening ... | Experimental Study on Bolt Tightening of Torsional Vibration Damper | 10.1007/978-981-13-9718-9_49 |
2020-01-01 | Cancer recurrence is one of the most imminent problems in the current world of medicine, and it is responsible for most of the cancer-related death rates worldwide. Long-term administration of anticancer cytotoxic drugs may act as a double-edged sword, as necrosis may lead to renewed cancer progression and treatment re... | Necrosis in the Tumor Microenvironment and Its Role in Cancer Recurrence | 10.1007/978-3-030-35727-6_6 |
2020-01-01 | A comparative study between a tuned mass damper (TMD) and a nonlinear energy sink (NES), attached to a linear two-degree-of-freedom (DoF) mechanical system under impulsive excitation, is performed. The analysis involves different scenarios; namely, we consider the cases in which only one or both modes of the primary sy... | Comparative Analysis of NES and TMD Performance via High-Dimensional Invariant Manifolds | 10.1007/978-3-030-23692-2_13 |
2020-01-01 | The history of formulation of the efficient method for studying the nonlinear dynamic response of structures, damping features of which depend on natural frequencies of vibrations, is presented. This technique is the modified version of the method of multiple scales, the efficiency of which is illustrated by the exampl... | The fractional derivative expansion method in nonlinear dynamic analysis of structures | 10.1007/s11071-019-05055-w |
2019-12-18 | In this work, the quantisation of particle propagating in a dissipative harmonic medium will be investigated using the creation and annihilation operator formalism, which is more appropriate in some fields of physics. Modelling the problem as damped harmonic oscillator, the equations of motion are then written in terms... | Quantisation of particle motion in dissipative harmonic environment | 10.1007/s12043-019-1882-4 |
2019-12-13 | By using variational methods, we obtain infinitely many nontrivial periodic solutions for a class of damped vibration systems with superquadratic terms at infinity. By using some weaker conditions, our results extend and improve some existing results in the literature. Besides, some examples are given to illustrate our... | Multiple periodic solutions for damped vibration systems with superquadratic terms at infinity | 10.1186/s13661-019-01306-2 |
2019-12-13 | In this paper, we consider convergence rates to solutions for the damped system of compressible adiabatic flow through porous media with boundary effect. Compared with the results obtained by Pan, the better convergence rates are obtained in this paper. Our approach is based on the technical time-weighted energy estima... | Convergence rates to the damped system of compressible adiabatic flow through porous media with boundary effect | 10.1186/s13661-019-01304-4 |
2019-12-12 | In this article, we study the existence of positive periodic solutions of second order damped boundary value problem u ″ + p ( t ) u ′ + q ( t ) u = g ( t , u , u ′ ) $u'' + p(t)u'+q(t)u = g(t,u,u')$ , u ( 0 ) = u ( T ) $u(0) = u(T )$ , u ′ ( 0 ) = u ′ ( T ) $u'(0) = u'(T )$ . The main tools are the nonlinear alternati... | Periodic solutions for second order damped boundary value problem with nonnegative Green’s functions | 10.1186/s13661-019-01302-6 |
2019-12-11 | In this paper, we consider the blow-up for solutions to a weakly coupled system of semilinear damped wave equations of derivative type in the scattering case. The assumption on the time-dependent coefficients for the damping terms means that these coefficients are summable and nonnegative. After introducing suitable fu... | Nonexistence of Global Solutions for a Weakly Coupled System of Semilinear Damped Wave Equations of Derivative Type in the Scattering Case | 10.1007/s00009-019-1445-4 |
2019-12-07 | In this paper we obtain the best Ulam constant for the second order linear differential operator with constant coefficients. As application we prove that damped oscillating systems are stable in Ulam sense while the harmonic oscillating systems are nonstable. Moreover, an optimal estimation between the solutions of the... | On the best Ulam constant of the second order linear differential operator | 10.1007/s13398-019-00776-4 |
2019-12-01 | In this article we consider a nonlinear viscoelastic Petrovsky equation in a bounded domain with distributed delay $$\begin{aligned} \begin{aligned}&|u_{t}(x,t)|^{l}u_{tt}(x,t)+\Delta ^{2}u(x,t)-\Delta u_{tt}(x,t)-\displaystyle \int _{0}^{t}h(t-\sigma )\Delta ^{2}u(x,\sigma )\,d\sigma +\mu _{1}u_{t}(x,t)\\&\quad +\int ... | Existence of global solutions and decay estimates for a viscoelastic Petrovsky equation with internal distributed delay | 10.1007/s12215-018-0373-7 |
2019-12-01 | The dynamic behavior of soil material is of importance in construction and geotechnical engineering. This study focuses on the dynamic properties of silty sands, particularly on the effect of plastic fines content (FC) on the shear modulus and damping ratio. Natural sand (Taiyuan sand) and fines (Taiyuan loess) were co... | The effect of plastic fines on the shear modulus and damping ratio of silty sands | 10.1007/s10064-019-01522-1 |
2019-12-01 | Of concern is a nonlinear second order initial value differential problem involving a convolution of a singular kernel with the derivative of the state. The problem describes the dynamics of a single-degree-of-freedom fractional oscillator. It is a generalization of the standard harmonic oscillator. The model also gene... | Long time behavior for a fractional Picard problem in a Hilbert space | 10.1007/s12215-018-0380-8 |
2019-12-01 | The dynamic nature of radiation damping is exploited in a fluoride fiber–based plasmonic sensor in terms of variable temperature ( T ) and Ag layer thickness ( d _m) at certain near-infrared wavelengths. The optimum point of radiation damping, which is stimulated by the presence of a graphene monolayer and its dynamic ... | SPR Sensing Enhancement with Dynamic Radiative Damping Stimulated by Graphene Conductivity Under Temperature Variation in NIR | 10.1007/s11468-019-00980-3 |
2019-12-01 | A plate submerged at a certain depth underneath the sea surface has been proposed as a structure type for different purposes, including motion response reduction, wave control, and wave energy harvesting. In the present study, the three-dimensional wave radiation problem is investigated in the context of the linear pot... | Wave Radiation by A Submerged Ring Plate in Water of Finite Depth | 10.1007/s13344-019-0064-y |
2019-12-01 | In boring process, tool vibration is an important parameter which results in progressive tool wear, poor surface finish and cutting tool damage. This tool vibration was reduced by passive, semi-active and active techniques which are used by various researchers in the past. In this paper, various techniques employed to ... | Suppression of Tool Vibration in Boring Process: A Review | 10.1007/s40032-019-00531-z |
2019-12-01 | This paper deals with the evolution of the shear modulus G and the damping D as a function of the shear deformation of the soil, using data from field and laboratory tests. The studied experimental site is located in port area of the city of Bejaia (Algeria), which has already been the subject of numerous geotechnical ... | Evaluation of Dynamic Soil Properties for Alluvial Plain of Bejaia Using Field Data and Laboratory Tests | 10.1007/s10706-019-00933-x |
2019-12-01 | Basin scale seiches in lakes are important elements of the total energy budget and are a driver of fluxes of important ecological parameters, such as oxygen, nutrients, and sediments. At present, the extraction of the damping ratios of surface seiches, which are directly related to the capacity of seiches to drive thes... | A novel technique for experimental modal analysis of barotropic seiches for assessing lake energetics | 10.1007/s10652-019-09677-x |
2019-12-01 | Natural fiber composites have become a new tradition as an alternative to conventional materials. To meet this new tradition material testing, newer techniques have been set up that are termed as dynamic mechanical analysis (DMA), which is an adaptable methodology that accompanies the more traditional techniques. Throu... | Dynamic mechanical properties of natural fiber composites—a review | 10.1007/s42114-019-00121-8 |
2019-12-01 | While doing vibration analysis in terms of the dynamic response of a beam, the end conditions, in most of the cases, are assumed to be fixed, simply supported, free or sliding imposing an ideal condition of end support displacement. But, in real engineering structures, the end supports are non-ideal (for example welded... | Dynamic Response of a Damped Euler–Bernoulli Beam Having Elastically Restrained Boundary Supports | 10.1007/s40032-018-0485-z |
2019-12-01 | Different thermal analysis techniques were used to study the effect of fillers and ionic liquids (ILs) on the vulcanization process, thermal and dynamic mechanical properties of acrylonitrile–butadiene elastomer (NBR). The products of the studies were composites of NBR filled with hydrotalcite, nanosized silica or carb... | Thermal characterization of the effect of fillers and ionic liquids on the vulcanization and properties of acrylonitrile–butadiene elastomer | 10.1007/s10973-019-08187-8 |
2019-12-01 | A considerable interest has been generated in recent years in the use of thermoplastic polymers as matrices in the manufacture of advanced composites that require high reliability during long-term operations. In this research, a new Elium® acrylic matrix developed by Arkema was studied to evaluate the accelerated test ... | Prediction of temperature-frequency-dependent mechanical properties of composites based on thermoplastic liquid resin reinforced with carbon fibers using artificial neural networks | 10.1007/s00170-019-04486-4 |
2019-12-01 | In the current study, the dynamic behavior of two planar mechanisms with revolute joints, in the presence of clearances is investigated. Subsequently, a control scheme with the aim of restraining the clearance and maintaining a more stable behavior is proposed. This approach is based on using tuned mass damper (TMD) in... | Effects of passive vibration absorbers on the mechanisms having clearance joints | 10.1007/s11044-019-09684-2 |
2019-12-01 | Accurate electromagnetic force control in a high speed on/off valve actuator (HSVA) can improve the performance of a vehicle braking system, and an accurate theoretical model is the key to smoothly controlling the high speed on/off valve. Therefore, a nonlinear model of an HSVA is proposed in this paper. Three subsyste... | Modeling and Control of A High Speed On/Off Valve Actuator | 10.1007/s12239-019-0114-8 |
2019-12-01 | This study investigates the displacement transmissibility of single-degree-of-freedom systems with a Coulomb friction contact between a mass and a fixed or oscillating wall. While forced vibration and base motion problems have been extensively investigated, little work has been conducted on the joined base-wall problem... | Displacement transmissibility of a Coulomb friction oscillator subject to joined base-wall motion | 10.1007/s11071-019-04983-x |
2019-12-01 | This paper presents the shunt damping of a unimorph piezoelectric mirror intended to be used as an active secondary corrector in future space telescopes. We propose to take advantage of the actuation capability of the piezoelectric mirror, to increase its natural damping during the critical launch phase of the spacecra... | Damping of piezoelectric space instruments: application to an active optics deformable mirror | 10.1007/s12567-019-00278-4 |
2019-12-01 | The interaction between a moving two-level atom and squeezed coherent states in the presence of Kerr like medium and an external classical field is studied. We consider the cavity field not to be isolated, so the field suffers from a decay rate. Under the rotating wave approximation, and some certain transformations, t... | External Classical Field and Damping Effects on a Moving two Level atom in a Cavity Field Interaction with Kerr-like Medium | 10.1007/s10773-019-04268-4 |
2019-12-01 | In this paper, optimization of the design of a fuzzy-genetic controller was done through the IDA and ET analysis methods. Combination controllers versus classical control methods have the ability to handle nonlinear and complex problem, learnability, adaptability and robustness to errors. However, one of the main short... | A Study on the Optimization of the Performance of Type 1 Fuzzy Controller Based on the IDA Method | 10.1007/s40996-018-0220-2 |
2019-12-01 | An adjustable cuckoo-search wavelet-based fuzzy logic controller (ACSWBFLC) is introduced to mitigate structural responses during seismic motion by using magnetorheological (MR) dampers. The ACSWBFLC incorporates four algorithms: discrete wavelet transform (DWT), fuzzy logic controller (FLC), modified Bouc–Wen model an... | Optimal Semi-active Structural Control with a Wavelet-Based Cuckoo-Search Fuzzy Logic Controller | 10.1007/s40996-018-0206-0 |
2019-11-30 | Abstract The origin of the friction between sliding bodies establishes an outstanding scientific problem. In this article, we demonstrate that the energy loss in each microscopic slip event between the bodies readily follows from the dephasing of phonons that are generated in the slip process. The dephasing mechanism d... | On the Origin of Frictional Energy Dissipation | 10.1007/s11249-019-1247-7 |
2019-11-28 | We prove spatiotemporal algebraically decaying estimates for the density of the solutions of the linearly damped nonlinear Schrödinger equation with localized driving, when supplemented with vanishing boundary conditions. Their derivation is made via a scheme, which incorporates suitable weighted Sobolev spaces and a t... | The linearly damped nonlinear Schrödinger equation with localized driving: spatiotemporal decay estimates and the emergence of extreme wave events | 10.1007/s00033-019-1223-y |
2019-11-28 | This review of MRF (magnetorheological fluids or MR fluids) brings out the challenges in methods of preparation, difficulties encountered in storage and use, and possible solutions to overcome the challenges. Magnetorheological fluid in the rheological fluid domain has found use due to its ability to change its shear s... | A review of challenges and solutions in the preparation and use of magnetorheological fluids | 10.1186/s40712-019-0109-2 |
2019-11-22 | In this paper, we consider the Cauchy problem for the sixth-order multidimensional generalized Boussinesq equation with double damping terms. By using the improved convexity method combined with Fourier transform, we show the finite time blow-up of solution with arbitrarily high initial energy. | Blow-up for the sixth-order multidimensional generalized Boussinesq equation with arbitrarily high initial energy | 10.1186/s13661-019-01297-0 |
2019-11-15 | The discrete element method (DEM) has been widely used in numerical evaluations in geotechnical engineering; however, simple analysis and verification are still needed to obtain the interaction mechanism between a single particle and a wall under a damping effect. A single freely falling particle model is proposed, and... | DEM verification of the damping effect in a freely falling particle motion for quasi- and non-quasi-static conditions | 10.1007/s12517-019-4848-4 |
2019-11-12 | We study the existence of subharmonic solutions for a forced pendulum equation with time-dependent damping. The proof is based on the theorem of the least action principle due to Mawhin and Willem (Critical point theory and hamiltonian systems. Springer, Berlin, 1989). Some results in the literature are generalized and... | Subharmonic oscillations of a forced pendulum with time-dependent damping | 10.1007/s11784-019-0746-3 |
2019-11-07 | In this paper, we consider wave equations with double damping terms expressed by $$u_{t}$$ u t and $$-\Delta u_{t}$$ - Δ u t and a power type of nonlinearity $$\vert u\vert ^{p}$$ | u | p . We are concerned with mixed problems for these equations in exterior domains of a bounded obstacle. A main purpose is to determine... | Critical exponent for semi-linear wave equations with double damping terms in exterior domains | 10.1007/s00030-019-0603-5 |
2019-11-04 | A custom ultrasonic calliper was employed to monitor voluntary and externally excited muscle dynamics with synchronous electromyography. The activation, hold, and relaxation phases of the gastrocnemius muscle were monitored for maximum voluntary isometric contraction. Muscle belly shortening occurred during contraction... | Monitoring skeletal muscle dynamics and modelling the nonlinear response | 10.1007/s42452-019-1560-7 |
2019-11-01 | Dissipative properties of a structural system are difficult to be characterized in real structure. Nevertheless, damping features may be dominant in several operating conditions of railway bridges influencing fatigue life or passenger comfort during train passage. Observations treating real data acquired in operational... | Measured properties of structural damping in railway bridges | 10.1007/s13349-019-00358-3 |
2019-11-01 | Nonstructural components (NSCs) housed in building structures are subject to semi-narrow band excitations generated via filtering of the ground motion by the supporting building. NSC design forces are generally provided based on adopting a 5% NSC viscous damping ratio ( $$ \xi_{\text{C}} $$ ξ C ), whereas recent experi... | Damping modification factor for elastic floor spectra | 10.1007/s10518-019-00684-3 |
2019-11-01 | In this paper, we study a semilinear Timoshenko system with heat conduction having two damping effects. The observation that two damping effects might lead to smaller decay rates for solutions in comparison to one damping effect is rigorously proved here in providing optimality results. Moreover, the global well-posedn... | Decay Estimate and Global Existence of Semilinear Thermoelastic Timoshenko System with Two Damping Effects | 10.1007/s10473-019-0601-z |
2019-11-01 | This study is aimed at evaluating seismic responses of a bridge pier isolated by high damping rubber bearing (HDRBs), subjected to intra-plate and inter-plate earthquake ground motion records. In this regard, a conventional bilinear model and two elasto-visco-plasticity-based rheology models (the original rheology mode... | Seismic Responses of a Bridge Pier Isolated by High Damping Rubber Bearing: Effect of Rheology Modeling | 10.1007/s40999-019-00454-x |
2019-11-01 | In this paper, we consider a one-dimensional porous-elastic system with past history and nonlinear damping term. We established the well-posedness using the semigroup theory and we showed that the dissipation given by this complementary controls guarantees the general stability for the case of equal speed of wave propa... | General decay of a nonlinear damping porous-elastic system with past history | 10.1007/s11565-019-00321-6 |
2019-11-01 | Moisture and aggressive ions transferring into concrete have detrimental effects on durability of reinforced concrete structure. To tackle this problem, damp-proofing admixtures, like calcium stearate, can be incorporated in the mixture design of concrete to restrict water and aggressive ions’ ingress into concrete. Ca... | The impact of calcium stearate on characteristics of concrete | 10.1007/s42107-019-00161-x |
2019-11-01 | One of the challenges of machining process is to improve the quality of machined surface by reducing the vibration of cutting tools. The research aims to suppress vibration using composite boring bars with an enhanced damping capacity. A new design of boring bars with different cross-sections is considered. Static and ... | The effect of composite boring bars on vibration in machining process | 10.1007/s00170-019-04298-6 |
2019-11-01 | Sea ice can attenuate wave energy significantly when waves propagate through ice covers. In this study, a third-generation wave model called simulating wave nearshore (SWAN) was advanced to include damping of wave energy due to friction in the boundary layer below the ice. With the addition of an eddy viscosity wave-ic... | Surface wave simulation during winter with sea ice in the Bohai Sea | 10.1007/s00343-019-8253-3 |
2019-11-01 | A fractional frequency transmission system (FFTS) is the most competitive choice for long distance transmission of offshore wind power, while the Hexverter, as a newly proposed direct AC/AC converter, is an attractive choice for its power conversion. This paper proposes a novel control scheme characterizing the global ... | A global asymptotical stable control scheme for a Hexverter in fractional frequency transmission systems | 10.1007/s40565-019-0549-y |
2019-11-01 | The lack of research on the double damper system seriously restricted the impact power’s increase of hydraulic rock drills. The structure and working principle of the double damper system are described. The key parameters such as the unloading damping pressure, damping flow, equilibrium position of the damping piston, ... | Design on Key Parameters of Double Damper System for Hydraulic Rock Drill | 10.1007/s10778-019-00989-5 |
2019-11-01 | The expansion of the wide-area measurement system has provided some control strategies to improve the low-frequency oscillation modes in electric power systems. One of these strategies is to use remote signals for a wide-area damping controller (WADC) to enhance the small-signal stability of the power system. However, ... | A procedure to design wide-area damping controllers for power system oscillations considering promising input–output pairs | 10.1007/s12667-018-0304-x |
2019-11-01 | The correct estimation of modal parameters has an important role in ensuring the structural reliability of existing bridges. Operational modal analysis provides rather accurate extraction of natural frequency and mode shapes, but the corresponding damping estimates are subjected to higher uncertainties. This paper repo... | Ambient and free-vibration tests to improve the quantification and estimation of modal parameters in existing bridges | 10.1007/s13349-019-00357-4 |
2019-11-01 | Abstract Fe–Cu alloys can be characterized as a system with immiscible components (IC). This statement is based on a weak mutual solubility in the solid state. In addition, Fe–Cu system stratifies in the liquid state at low carbon content. Alloys with ICs have a simple phase composition of almost pure components, which... | Investigation of Two-Phase State of Fe–Cu Melts during Cooling in a Viscometer | 10.3103/S0967091219110032 |
2019-11-01 | Every year earthquake damage causes hundreds of death all over the world. As much as possible, buildings should be kept in the elastic zone during an earthquake, therefore, the failure of building the main member is reduced. This paper investigated an oval steel shaped yielding damper used for seismic protection of che... | Cyclic Performance and Mechanical Characteristics of the Oval-shaped Damper | 10.1007/s12205-019-1382-6 |
2019-11-01 | The dynamics of a nonlinear passive vibration absorber conceived to mitigate vibrations of a nonlinear host structure is considered in this paper. The system under study is composed of a primary system, consisting of an undamped nonlinear oscillator of Duffing type, and a nonlinear dynamic vibration absorber, denominat... | Impulsive vibration mitigation through a nonlinear tuned vibration absorber | 10.1007/s11071-019-05312-y |
2019-10-28 | For the linear damped wave equation (DW), the $$L^p$$ L p – $$L^q$$ L q type estimates have been well studied. Recently, Watanabe (RIMS Kôkyûroku Bessatsu B 63:77–101, 2017) showed the Strichartz estimates for DW when $$d=2,3$$ d = 2 , 3 . In the present paper, we give Strichartz estimates for DW in higher dimensions. ... | The Strichartz estimates for the damped wave equation and the behavior of solutions for the energy critical nonlinear equation | 10.1007/s00030-019-0598-y |
2019-10-26 | We are concerned with global well-posedness of the three-dimensional Vlasov–Poisson system with radiation damping. First, we show that global $$C^1$$ C 1 solutions verifying specified decay conditions are stable under small perturbations. As a consequence, we obtain that a small perturbation of a monopolar and spherica... | On global classical solutions of the Vlasov–Poisson system with radiation damping | 10.1007/s00033-019-1211-2 |
2019-10-23 | In this article, we consider a one-dimensional Timoshenko system subject to different types of dissipation (linear and nonlinear damping). Based on a combination between the finite element and the finite difference methods, we design a discretization scheme for the different Timoshenko systems under consideration. We f... | Discrete energy behavior of a damped Timoshenko system | 10.1007/s40314-019-0982-6 |
2019-10-15 | A feedback control strategy for mitigating pressure oscillations in centrifugal pumping systems is proposed herein. Severe system damage may occur if such oscillations are not adequately damped. According to the experimental data observed, this dominant oscillating mode is operating point-dependent and may become poorl... | Mitigating Oscillations in Hydraulic Pumping Systems by Using a Supplementary Damping Controller | 10.1007/s40313-019-00481-y |
2019-10-10 | The present paper focuses on the oscillation of the third-order nonlinear neutral differential equations with damping and distributed delay. The oscillation of the third-order damped equations is often discussed by reducing the equations to the second-order ones. However, by applying the Riccati transformation and the ... | Oscillation of third-order neutral differential equations with damping and distributed delay | 10.1186/s13662-019-2363-2 |
2019-10-05 | The performance of Magnetorheological dampers should be analyzed to study the stability of Magnetorheological fluid and its configuration. To this end, in this study a prototype Magnetorheological fluid is presented. The fluid consists of stabilized Silicone dioxide (SiO_2) nanoparticles, Stearic acid, Phosphoric acid ... | Mathematical modeling and experimental evaluation of a prototype double-tube Magnetorheological damper | 10.1007/s42452-019-1408-1 |
2019-10-01 | The use of tools with chamfered cutting edges is an essential part of high performance cutting (HPC) as a rough milling process strategy for manufacturing structural components in the aerospace industry. Due to an interaction between the chamfer and the undulated workpiece surface, tool vibrations can be damped allowin... | Analysis and simulation of process damping in HPC milling | 10.1007/s11740-019-00912-4 |
2019-10-01 | Abstract This paper is devoted to studying the motion of non-holonomic systems with higher-order constraints. The problem of the motion of such systems is formulated as the generalized Chebyshev problem. This refers to the problem in which the solution to a system of equations of motion should simultaneously satisfy an... | Formulation and Solution of a Generalized Chebyshev Problem: First Part | 10.1134/S1063454119040137 |
2019-10-01 | Abstract —The stiffness and damping properties of various-thickness samples made of a composite material based on a rubber mixture, rubber fiber composite material, and thermoplastic elastomers of various stiffnesses are studied under static and dynamic loading conditions at a temperature of 23 and –40°C. The composite... | Elastic Hysteretic Properties of Damping Composite Materials for Rail Transport at Low Temperatures under Static and Dynamic Loading | 10.1134/S0036029519100161 |
2019-10-01 | Tuned mass damper (TMD) is an effective passive device in reducing harmful vibrations as long as they are designed correctly. An optimal TMD design method is proposed based on transfer functions and also differential evolution (DE) algorithm is used. The method includes optimization of all parameters which are the mass... | A New Tuned Mass Damper Design Method based on Transfer Functions | 10.1007/s12205-019-0305-x |
2019-10-01 | The reduction in vibration in gear transmission systems is an engineering task. Particle damping technology attenuates vibration by means of friction and inelastic collisions between damping particles. This study proposes a dynamic model for a spur gear transmission system that contains damping particles inside the hol... | Dynamic modeling of a gear transmission system containing damping particles using coupled multi-body dynamics and discrete element method | 10.1007/s11071-019-05177-1 |
2019-10-01 | Damping is critical for the roll motion response of a ship in waves. A common method for the assessment of damping in a ship’s rolling motion is to perform a free-decay experiment in calm water. In this paper, we propose an approach for estimating nonlinear damping that involves a linear exponential analytical approxim... | Estimation of Nonlinear Roll Damping by Analytical Approximation of Experimental Free-Decay Amplitudes | 10.1007/s11802-019-3912-8 |
2019-10-01 | Rotating machinery support design with the aim of reducing the synchronous unbalance response has significant importance regarding the various applications of these machineries. In this paper, we present H _ ∞ and H _2 methods for calculating the optimum support flexibility and damping of flexible rotors to minimize vi... | H_∞ and H_2 optimization procedures for optimal design of support parameters of a flexible rotor | 10.1007/s40314-019-0945-y |
2019-10-01 | The paper discusses the effectiveness of currently used methods of surface damping of bending vibrations for thin-walled structures. The special features of surface damping of vibrations using a free and constraining layer damping are analyzed from a physical point of view and practical application. A combined damping ... | An Integral Method of Surface Damping of Bending Vibrations for Thin-Walled Structures | 10.3103/S1068799819040056 |
2019-10-01 | Based on the Hilbert transform, measurement errors of the amplitude and frequency of a vibrating signal of variable frequency are studied. The chief factors affecting measurement error of the parameters of a signal were determined by means of numerical modeling. The use of a frequency response model of a vibration isol... | Numerical and Full-Scale Study of Measurement Errors of the Frequency Response of Vibration Isolators | 10.1007/s11018-019-01669-z |
2019-10-01 | Wind turbine technology is well known around the globe as an eco-friendly and effective renewable power source. However, this technology often faces reliability problems due to structural vibration. This study proposes a smart semi-active vibration control system using Magnetorheological (MR) dampers where feedback con... | Smart Semi-active PID-ACO control strategy for tower vibration reduction in Wind Turbines with MR damper | 10.1007/s11803-019-0541-6 |
2019-10-01 | Structural safety of building particularly that are intended for exposure to strong earthquake loads are designed and equipped with high technologies of control to ensure as possible as its protection against this brutal load. One of these technologies used in the protection of structures is the semi-active control usi... | Neural network control for earthquake structural vibration reduction using MRD | 10.1007/s11709-019-0544-4 |
2019-10-01 | This paper summarizes the development of a new replaceable horizontally steel arc-cut damper (HACD) designed as a fuse element in steel-coupling beams for earthquake protection of reinforced concrete shear walls with openings. The HACD is fabricated from a steel arc-cut plate and restraining plates positioned by vertic... | New Fused Steel-Coupling Beam with Optimized Shear Panel Damper | 10.1007/s40999-019-00430-5 |
2019-09-18 | The improvement of the average fidelity of the quantum teleportation protocol of an arbitrary qubit state has been researched. The initial quantum channel is chosen as the non-maximally entangled state, and this state depends on a free parameter. One qubit of this quantum channel is influenced by the amplitude-damping ... | Optimal fidelity for quantum teleportation protocol of an arbitrary qubit state affected by amplitude-damping noise: causes and results | 10.1007/s11128-019-2455-7 |
2019-09-16 | In this research, semi-active control of sandwich plates with electro-rheological (ER) core and carbon nanotubes-reinforced composite facesheets using smart ER dampers is studied. Sandwich plate is subjected to the external electric field and rested on orthotropic visco-Pasternak foundation. The material properties of ... | Application of smart electro-rheological dampers in semi-active control of electro-rheological sandwich plates with nanocomposite facesheets rested on orthotropic visco-Pasternak foundation | 10.1007/s40430-019-1903-8 |
2019-09-13 | Offshore jacket platforms are exposed to environmental loads such as wind, wave, current, and earthquake throughout the lifetime of operation. Due to dynamic and periodic nature and fatigue phenomenon in the structure, wave forces are the most important loads among others. There are diverse methods to explore the fatig... | Spectral fatigue analysis of jacket platform under wave load equipped with viscous damper | 10.1007/s00773-018-0592-9 |
2019-09-12 | In this paper, we are concerned with variable coefficients plate system subjected to three partially distributed feedbacks: time-varying delay, frictional and viscoelastic dissipations. This work is devoted to, without any prior quantification of both decay rate of relaxation function and growth rate of frictional diss... | Viscoelastic versus frictional dissipation in a variable coefficients plate system with time-varying delay | 10.1007/s00033-019-1192-1 |
2019-09-06 | In this study, the mechanical properties of a high-strength laminated vibration damping steel sheet (LVDSS) with stretch-dominated deformation behavior were characterized and successfully applied to formability prediction. The high-strength LVDSS was fabricated with dual-phase 590 steel sheets as outer skins and polyme... | Characterization of the Mechanical Properties of a High-Strength Laminated Vibration Damping Steel Sheet and Their Application to Formability Prediction | 10.1007/s12540-019-00281-8 |
2019-09-05 | Magnetorheological (MR) fluids belong to a class of controllable fluids, and the composition and concentration of its components govern its magnetorheological properties. In this study, an optimum particle loading (or mass fraction) and size of iron particles in MR fluid for use in a shear mode monotube MR damper were ... | Determination of optimal magnetorheological fluid particle loading and size for shear mode monotube damper | 10.1007/s40430-019-1895-4 |
2019-09-01 | Low-frequency electromechanical oscillations damping is powerfully crucial in power system operation. In order to fulfill this requirement, power oscillation damping (POD) controllers are installed in synchronous generators and flexible alternating current transmission system devices. These controllers can have either ... | Multi-band power oscillation damping controller for power system supported by static VAR compensator | 10.1007/s00202-019-00830-9 |
2019-09-01 | Communication latency which inherently occurs in wide area measurement system greatly degrades small-signal stability (SSS) and is stochastic in nature, and thus, the current power oscillation damping controllers (PODCs) designed to improve SSS must consider this crucial factor. This paper proposes a probabilistic meth... | Optimized tuning of power oscillation damping controllers using probabilistic approach to enhance small-signal stability considering stochastic time delay | 10.1007/s00202-019-00833-6 |
2019-09-01 | Abstract We propose a method for describing damped vibrations of a beam with a built-in end considering the dynamic hysteresis that determines mechanical energy dissipation due to viscoelasticity. As the mathematical basis, we have used the fractional integro-differentiation apparatus. Rapidly damped vibrations of a fo... | New Method for Describing Damped Vibrations of a Beam with a Built-in End | 10.1134/S1063784219090135 |
2019-09-01 | For advanced attitude control of the satellite, reaction wheels are used, which are actuated by motor. Fault detection and prediction of Remaining Useful Life (RUL) of the motor is of great importance. This study aims to demonstrate health management of reaction wheel motor in satellites by estimating the RUL of the da... | Remaining useful life prediction of reaction wheel motor in satellites | 10.1007/s42791-019-00020-5 |
2019-09-01 | Subsystems of Russian automatic excitation regulators that ensure the maximum dynamic stability and effective damping of oscillations in an electric power system are described. They are compared to stabilizers included in international and national standards of other countries. It is shown that the Russian system stabi... | Implementing the System Functions of the Automatic Proportional-Derivative Excitation Control of Synchronous Generators | 10.1007/s10749-019-01084-y |
2019-09-01 | Vibration is a concern in the boring process due to the low dynamic stiffness of long cantilever boring bars. Vibration has a negative impact on the processing quality and processing performance. Dynamic vibration absorbers (DVAs) are used to consume vibration energy to improve the performance of boring operations. In ... | Nonlinear system modeling and damping implementation of a boring bar | 10.1007/s00170-019-03907-8 |
2019-09-01 | Thermoacoustic instabilities are a major issue for industrial and domestic burners. One possible framework to study these instabilities is to represent the system by a network of Dimensionless Acoustic Transfer Matrices (DATM) that link pressure and velocity fluctuations upstream and downstream each element of the netw... | Impact of the Acoustic Forcing Level on the Transfer Matrix of a Turbulent Swirling Combustor with and Without Flame | 10.1007/s10494-019-00033-z |
2019-09-01 | A quasi-zero stiffness (QZS) isolator is devised to acquire the feature of high-static-low-dynamic stiffness. Cam–roller–nonlinear spring mechanisms, where two horizontal dampers are installed symmetrically, are employed as a negative stiffness provider to connect in parallel with a vertical spring. From the static ana... | Dynamic characteristics of a quasi-zero stiffness vibration isolator with nonlinear stiffness and damping | 10.1007/s00419-019-01541-0 |
2019-09-01 | This study focused on rheological and mechanical properties of poly(vinylidene fluoride) nanocomposites incorporated with functionalized graphene nanoplatelets and hydroxylated titanium dioxide. Mechanical properties of the ternary composites were improved with a slight reduction in damping coefficient compared to the ... | Advanced rheological and mechanical properties of three-phase polymer nanocomposites through strong interfacial interaction of graphene and titania | 10.1007/s00170-019-03999-2 |
2019-09-01 | Similarly to electromagnetic waves, plasma waves can also carry an orbital angular momentum. A key distinction from electromagnetic waves is that plasma waves are intrinsically coupled to electrons and may deposit their momentum with electrons, resulting in their secular motion and generation of quasistatic magnetic fi... | Twisted Kinetic Plasma Waves | 10.1007/s10946-019-09822-3 |
2019-09-01 | Modeling dynamic and static responses of an elastic medium often employs different numerical schemes. By introducing damping into the system, we show how the widely used time-marching staggered finite difference (FD) approach in solving elastodynamic wave equation can be used to model time-independent elastostatic prob... | A Damped Dynamic Finite Difference Approach for Modeling Static Stress–Strain Fields | 10.1007/s00024-019-02207-2 |
2019-09-01 | In this paper, we present a subspace method for solving large scale nonlinear equality constrained optimization problems. The proposed method is based on a SQP method combined with the limited-memory BFGS update formula. Each subproblem is solved in a theoretically suitable subspace. In the case of few constraints, we ... | A subspace SQP method for equality constrained optimization | 10.1007/s10589-019-00109-6 |
2019-09-01 | In recent years, the semi-active control of structural vibrations has interested several researchers. It has been demonstrated that semi-active control strategies are economical solutions for the safety of structure against earthquake or wind excitations. In this study, a semi active device which utilizes the Magneto-R... | Adaptive sliding mode vibrations control for civil engineering earthquake excited structures | 10.1007/s40435-019-00559-0 |
2019-09-01 | Control polices with semi-active and active devices such as magnetorheological (MR) damper, magnetorheological isolator, magnetorheological mount, electrorheological dampers, actuators and pneumatics are integrated with automotive seating system (ASS) for seating and ride comfort. Semi-active device has been developed ... | Control policies used for semi-active damper for automotive seating system: a review | 10.1007/s40435-018-0460-9 |
2019-09-01 | Field controllable magnetorheological (MR) damper has gained prominence as a suitable vibration control device for a wide variety of applications as they offer the combined advantages of high-performance metrics of a fully active vibration control system with the cost metrics of a passive vibration control system. The ... | Design optimization of magnetorheological damper geometry using response surface method for achieving maximum yield stress | 10.1007/s12206-019-0828-6 |
2019-09-01 | The high-temperature superconducting (HTS) maglev system is characterized with self-stable levitation, low energy consumption, and pollution-free operation, and it has been considered as a promising technology for implementing high-speed transport systems. But the previous studies have shown that the damping of such sy... | Vibration Suppression of High-Temperature Superconducting Maglev System via Electromagnetic Shunt Damper | 10.1007/s10948-019-5050-3 |
2019-08-30 | The need for larger and more efficient structures has led to the development of numerical models to approach real-world complex behaviors. Normally, engineering systems consider deterministic parameters, while in real-world situations, they are subjected to parametric uncertainties, resulting in differences between the... | Fatigue damage investigation and optimization of a viscoelastically damped system with uncertainties | 10.1007/s40430-019-1879-4 |
2019-08-16 | Nowadays, the trajectory model for a subsonic fin-stabilized projectile at a low angle of attack is typically a point-mass model (PMM), taking only gravity and a constant zero-yaw drag into account. This choice can be qualitatively justified for non-lethal projectiles given the short ranges. The disadvantage of this ap... | Aerodynamical CFD Study of a Non-Lethal 12-Gauge Fin-Stabilized Projectile | 10.1007/s41314-019-0020-x |
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