publicationDate stringlengths 10 10 | abstract stringlengths 0 37.3k | title stringlengths 1 5.74k | doi stringlengths 11 47 ⌀ |
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2022-10-01 | This study investigates the efficacy of using an artificial neural network (ANN) to predict the seismic response of a single degree of freedom (SDOF) system comprising a reinforced concrete (RC) column supporting a mass and equipped with a superelastic shape memory alloy (SMA) damper. Nonlinear time history simulations... | Using Machine Learning to Predict the Seismic Response of an SDOF RC Structure with Superelastic Dampers | 10.1007/s40999-022-00724-1 |
2022-10-01 | Studying wave propagation in phononic crystals (PCs) in the presence of energy dissipation is a crucial step toward the precise dynamic modeling of periodic structures. Fractional calculus is an appropriate tool to reach a more perceptive idea of energy dissipation compared to other damping models. Therefore, in this w... | Wave propagation in fractionally damped nonlinear phononic crystals | 10.1007/s11071-022-07704-z |
2022-10-01 | Purpose Chatter can damage parts. It must hence be avoided and/or suppressed. This paper discusses the use of active vibration control to suppress chatter in a milling process. To apply only as much force as is necessary to stabilize the process, a novel adaptive and model-free gain tuning method is proposed in which g... | Adaptive Model-Free Gain Tuning for Active Damping of Machine Tool Vibrations | 10.1007/s42417-022-00520-0 |
2022-10-01 | The fluid characteristics of the MR damper have a notable impact on its design and overall conduct of the damper application devices. First, the hydraulic circuit design features of the MR damper are introduced and then the detailed testing scheme of the damper was proposed. The damping characteristics of fluid were te... | Experimental Investigation of Nickel Ferrite (NiFe_2O_4)-Based Nano-magnetorheological Fluid Characteristics Using MR Damper Under Triangular Displacement Excitation | 10.1007/s42417-022-00522-y |
2022-10-01 | Vehicle vibration control must be implemented to fulfill the aims of sustainable environmental development and minimize human health risks. This article concentrates on the minimization of driver’s body vibrations by improving ride comfort and vehicle stability. The hybrid semi-active vibration control system with the ... | Improvement in Ride Comfort and Vehicle Stability using Hybrid Semi-Active Suspension System | 10.1007/s40032-022-00855-3 |
2022-10-01 | This work presents an investigation on the morphology, mechanical, viscoelastic and transport properties of acrylonitrile–butadiene–styrene (ABS) nanocomposites reinforced with nanosilica (NS) and multiwalled carbon nanotubes (MWCNTs). The nanofillers content was varied from 1 to 5 wt%. Morphological and mechanical inv... | Mechanical, viscoelastic and sorption behaviour of acrylonitrile–butadiene–styrene composites with 0D and 1D nanofillers | 10.1007/s00289-021-03896-3 |
2022-10-01 | Considering that the fluid-conveying pipes made of fractional-order viscoelastic material such as polymeric materials with pulsatile flow are widely applied in engineering, we focus on the stability and bifurcation behaviors in parametric resonance of a viscoelastic pipe resting on an elastic foundation. The Riemann–Li... | Nonlinear Fractional-Order Dynamic Stability of Fluid-Conveying Pipes Constituted by the Viscoelastic Materials with Time-Dependent Velocity | 10.1007/s10338-022-00328-1 |
2022-10-01 | Currently the basis for the seismic design of most modern structures is to use a mechanism of the sacrificial members. Consequently, damage to structures under a strong ground shaking is inevitable. This article introduces a new self-centered damping device that can be used in slotted concrete connections. The purpose ... | Development and experimental validation of a new self-centering HF2V damper with disc springs | 10.1007/s10518-022-01495-9 |
2022-10-01 | A study was conducted to develop a high damping elastomeric nanocomposite for constrained layer damping (CLD) arrangement to reduce structural vibration at a low weight penalty. Hence, an organically modified montmorillonite (OMMT) clay was used as reinforcement at loadings of 2, 5, 10 and 20 phr in nitrile rubber/poly... | Effect of nanoclay reinforcing filler in nitrile rubber/polyvinyl chloride blend: frequency response of dynamic viscoelasticity and vibration damping | 10.1007/s13726-022-01074-4 |
2022-10-01 | This paper introduces the F $$_3$$ 3 ORNITS non-iterative co-simulation algorithm in which F $$_3$$ 3 stands for the 3 flexible aspects of the method: flexible polynomial order representation of coupling variables, flexible time-stepper applying variable co-simulation step size rules on subsystems allowing it, and flex... | F
$$_3$$
3
ORNITS : a flexible variable step size non-iterative co-simulation method handling subsystems with hybrid advanced capabilities | 10.1007/s00366-022-01610-z |
2022-10-01 | Parametric excitation in the pitch/roll degrees of freedom (DoFs) can induce dynamic instability in floating cylinder-type structures such as spar buoys, floating offshore wind or wave energy converters. At certain frequency and amplitude ranges of the input waves, parametric coupling between the heave and pitch/roll D... | Parametric excitation suppression in a floating cylinder via dynamic vibration absorbers: a comparative analysis | 10.1007/s11071-022-07710-1 |
2022-10-01 | Excessive tool wear can shorten tool life and cause low machining surface quality and efficiency in the milling of Ti-6AI-4 V thin-walled workpieces. The influence mechanism between the tool flank wear and stability predication is of significant for its further development in milling Ti-6Al-4 V. However, the relationsh... | Investigation of tool flank wear effect on system stability prediction in the milling of Ti-6AI-4 V thin-walled workpiece | 10.1007/s00170-022-10136-z |
2022-10-01 | Investigation on particle synchronization behavior and different kinds of stochastic resonance mechanism is reported in a fractional-order stochastic coupled system, which endures an external periodic excitation and polynomial asymmetric dichotomous noise damping disturbance. An extending of the method of stochastic av... | Analysis of stochastic resonance in coupled oscillator with fractional damping disturbed by polynomial dichotomous noise | 10.1007/s11071-022-07688-w |
2022-10-01 | Double-column bridge piers are prone to local damage during earthquakes, leading to the destruction of bridges. To improve the earthquake resistance of double-column bridge piers, a novel swing column device (SCD), consisting of a magnetorheological (MR) damper, a current controller, and a swing column, was designed fo... | Simulation research on the energy dissipation and shock absorption performance of a swing column device based on fuzzy control | 10.1007/s11803-022-2131-2 |
2022-10-01 | Abstract For the turbine system of an aircraft, an electric-drive damper is proposed that is designed to completely block and throttle the cooling air flow in the radial-clearance control system. The valve consists of a regulating body (throttling device of flap type) and an electromechanism. Such a system provides a r... | Electric-Drive Damper of an Active Radial-Clearance Control System for an Aircraft Gas Turbine Engine | 10.3103/S1068371222100091 |
2022-10-01 | The optimum tuning frequency ratio and damping of the tuned mass damper inerter (TMDI) used in damped single-degree-of-freedom (SDOF) structure subjected to stationary white-noise earthquake excitation is obtained with the help of numerical searching technique. Minimization of the mean-square absolute acceleration and ... | Optimum parameters of tuned mass damper-inerter for damped structure under seismic excitation | 10.1007/s40435-022-00911-x |
2022-10-01 | The dynamic responses of the buildings and the optimum parameters of tuned mass damper inerter (TMDI) may change significantly when soil-structure interaction (SSI) is considered. Thus, it is necessary to consider the effect of the SSI in the optimization of TMDI. The study aims at proposing a methodology for optimizat... | Optimization of tuned mass damper inerter for a high-rise building considering soil-structure interaction | 10.1007/s00419-022-02217-y |
2022-10-01 | Background The present study insights the development of magneto rheological (MR) damper and its comparison with existing viscous damper. The advantage of a magneto rheological damper over an existing viscous damper or passive damper is that they offer semi-active control of the system. The magneto rheological damper w... | Improvement of Ride Comfort in a Passenger Car Using Magneto Rheological (MR) Damper | 10.1007/s42417-022-00512-0 |
2022-09-27 | This paper provides a systematic analysis of the large scale PMSG (permanent magnet synchronous generator)-based WECS (wind energy conversion system) torsional vibration problem under MPPT (maximum power point tracking) control and constant power control. This is from the perspective of SSO (sub-synchronous oscillation... | Drive-train torsional vibration suppression of large scale PMSG-based WECS | 10.1186/s41601-022-00257-8 |
2022-09-24 | This study addresses the innovative integration of free-free resonant column measurements (FFRC) of body wave velocities in rock specimens with the X-ray microcomputer tomography (micro-CT or μ-CT) imaging. FFRC seismic measurements combined with μ-CT scanning is a novelty manner to execute and interpret dynamic rock c... | Rock characterization integrating free-free resonant column measurements and X-ray computed tomography imaging | 10.1007/s40948-022-00476-1 |
2022-09-17 | This work aims at exploring an antagonistic actinobacterial strain isolated from the roots of Ziziphus lotus in bioformulation processes and the biocontrol of Rhizoctonia solani damping-off of tomato seedlings. The strain Streptomyces caeruleatus ZL-2 was investigated for the principal in vitro biocontrol mechanisms an... | Formulation of biofungicides based on Streptomyces caeruleatus strain ZL-2 spores and efficacy against Rhizoctonia solani damping-off of tomato seedlings | 10.1007/s00203-022-03251-8 |
2022-09-15 | This paper deals with the existence of bursting, mixed-mode oscillations (MMOs) and horseshoe chaos in a mixed Rayleigh–Liénard oscillator with asymmetric double well potential driven by parametric periodic damping and external excitations. The dynamical behaviours of the considered model, when the exciting frequency i... | Bursting, mixed-mode oscillations and homoclinic bifurcation in a parametrically and self-excited mixed Rayleigh–Liénard oscillator with asymmetric double well potential | 10.1007/s12043-022-02412-0 |
2022-09-13 | The paper investigates the well-posedness and the regularity of the solutions, the existence and the continuity of the strong attractors for the structurally damped Kirchhoff wave models with subcritical-critical nonlinearities: $$u_{tt}-(1+\epsilon \Vert \nabla u\Vert ^2)\Delta u+(-\Delta )^{\alpha } u_t+h(u_t)+g(u)=f... | Strong Attractors for the Structurally Damped Kirchhoff Wave Models with Subcritical-Critical Nonlinearities | 10.1007/s00245-022-09894-9 |
2022-09-10 | To determine whether damping induced by stirring granular materials can be adopted as passive damping, the efficiency of damping upon stirring granular materials was investigated experimentally and numerically. In the experimental approach, a cylindrical mixer with a flat blade was used. As the rotating axis of the bla... | Analysis of granular damping induced by mechanical stirring | 10.1007/s10035-022-01272-0 |
2022-09-08 | Small strain dynamic properties of soil are the primary input parameter in seismic ground response analysis studies. This study examines the small strain shear modulus ( G _max) and damping ratio ( ξ ) using bender element (BE) tests on subsoil samples along with evaluation of liquefaction potential (sandy soil) using ... | Assessment of small strain dynamic soil properties of railway site Agartala, India, by bender element tests | 10.1007/s12517-022-10749-4 |
2022-09-05 | We studied experimentally and numerically the compaction and subsequent expansion dynamics of a granular bed composed of cylindrical repelling magnets contained in a two-dimensional cell. The particles are firstly compressed vertically with a piston at a given strain rate until a maximum force is reached. The piston is... | Experimental and numerical investigation of the compression and expansion of a granular bed of repelling magnetic disks | 10.1007/s10035-022-01268-w |
2022-09-01 | In this paper we investigate the effect of nonlinear damping on the Lugiato–Lefever equation $$\mathrm {i}\partial _t a = -(\mathrm {i}-\zeta ) a - da_{xx} -(1+\mathrm {i}\kappa )|a|^2a +\mathrm {i}f$$ i ∂ t a = - ( i - ζ ) a - d a xx - ( 1 + i κ ) | a | 2 a + i f on the torus or the real line. For the case of the toru... | The Lugiato–Lefever Equation with Nonlinear Damping Caused by Two Photon Absorption | 10.1007/s10884-021-09943-x |
2022-09-01 | The knowledge of the added mass and damping characteristics induced by the vibration of the propeller in water is important to predict the hydroelastic behavior of the propulsion system. A three-dimensional panel method combined with the finite element method is conducted to analyze the properties of wet modes and adde... | Hydroelastic analysis of underwater rotating propellers based on different boundary conditions | 10.1007/s00773-022-00895-5 |
2022-09-01 | In this paper, the authors consider the asymptotic synchronization of a linear dissipative system with multiple feedback dampings. They first show that under the observability of a scalar equation, Kalman’s rank condition is sufficient for the uniqueness of solution to a complex system of elliptic equations with mixed ... | Uniqueness of Solution to Systems of Elliptic Operators and Application to Asymptotic Synchronization of Linear Dissipative Systems II: Case of Multiple Feedback Dampings | 10.1007/s11401-022-0352-3 |
2022-09-01 | A multi-objective optimization approach for optimal smart damping treatment of functionally graded magneto-electro-elastic plate (FGMEE) structures is investigated in the present study. The finite element method is employed to analyze the vibration responses of the FGMEE plate with active constrained layer damping (ACL... | Multi-objective optimization of the active constrained layer damping for smart damping treatment in magneto-electro-elastic plate structures | 10.1007/s10999-022-09596-8 |
2022-09-01 | Purpose Due to the use of brittle materials and special structure, the porcelain column electrical equipment is easy to be damaged in the earthquake, so it is necessary to carry out the research on the damping control of this kind of equipment. Methods In this study, the damping control test and finite-element analysis... | Seismic Response Control of T-Shaped Porcelain Column Circuit Breaker Based on Shape Memory Alloy Cables | 10.1007/s42417-022-00568-y |
2022-09-01 | This paper is devoted the study of a generalized hybrid dynamical system, which consists of a history-dependent hemivariational inequality of parabolic type and a nonlinear evolution equation. The unique solvability for the system is established via applying surjectivity of multivalued pseudomonotone operators, fixed p... | Dynamic History-Dependent Hemivariational Inequalities Controlled by Evolution Equations with Application to Contact Mechanics | 10.1007/s10884-021-10088-0 |
2022-09-01 | In seismic design methods, the damping modification factors (DMFs) are the important parameter considerations in structure design. This paper investigates the effect of closest distance, site conditions, earthquake magnitude, peak ground acceleration (PGA), and damping ratios ( ξ ) on DMFs to the vertical response spec... | Damping modification factor of the vertical response spectrum | 10.1007/s42107-022-00465-5 |
2022-09-01 | Micro and millimeter-scaled cantilever beams are commonly used to apply and measure microforce and manipulate micro-objects, biological cells, and tissues. In manipulating micro-objects and actuating micro-devices by cantilever beams, sudden application and release of forces are typical, and subject to static and dynam... | Mechanical and dynamic characteristics of double and single beam cantilevers for MEMS manipulation | 10.1007/s12206-022-0825-z |
2022-09-01 | Although self-centering rocking walls have shown acceptable performance in decreasing downtime, repair cost, and continuous serviceability, their energy dissipation capacity is relatively low. This research introduces a supplementary rebar system (SRS) to improve the energy dissipation capacity of rocking walls. The ad... | Evaluating the efficiency of supplementary rebar system in improving hysteretic damping of self-centering rocking walls | 10.1007/s10518-022-01421-z |
2022-09-01 | Ultrasonic probes for high-temperature applications are provided with metallic wedges, which can withstand the contact with the high temperature of the inspected structure. The ultrasonic signal travels within the wedge and gets reflected from its boundaries, causing interference signals called “ghost echoes”. The curr... | External Acoustical Damping on a Metallic Angle Wedge in a High Temperature Resistant Ultrasonic Probe | 10.1007/s40857-022-00270-9 |
2022-09-01 | Background Using dry friction damper is a very common solution to avoid resonance in turbine blade. Dry friction dampers insert non-linearity to the vibration analysis of the blade disk. To predict nonlinear frequency response of turbine blade, accurate contact simulation is necessary. Purpose To accurately simulation ... | Coupling Between the Tangential and Normal Direction in Turbine Blade Forced Vibration Analysis | 10.1007/s42417-022-00540-w |
2022-09-01 | The existing aerostatic spindle dynamic model only analyses the effects of mass imbalance and external load, ignoring the influence of cutting system on the spindle dynamic characteristics under cutting conditions. In this paper, a 5-DOFs aerostatic spindle dynamic model is established considering the influence of the ... | A novel 5-DOFs dynamic model of aerostatic spindle considering the effect of process damping in ultra-precision machining | 10.1007/s12206-022-0801-7 |
2022-09-01 | One of the effective methods of vibration isolation of the equipment of biogas treatment plants is the use of vibration supports. Technologies for semi-active vibration damping, the main advantage of which is their stability and adaptability to the operating conditions of process equipment, are actively developing. The... | Magneto-Liquid Vibration Support for Equipment of Biomethane Production Plant | 10.1007/s10556-022-01105-0 |
2022-09-01 | The periodic lattice structure has obvious advantages in lightweight and multi-functional design. With the development of manufacturing technology, especially the development of selective laser melting, the periodic lattice structure has been more extensively used, and attracts more attention in studying its structural... | Property Analysis of Periodic Lattice Structure with Considering its Size Effect | 10.1007/s42423-022-00112-w |
2022-09-01 | Abstract— Reductive perturbation technique is employed to obtain damped forced Korteweg–de Vries (DFKdV) equation in a dusty plasma containing non-thermally distributed electrons in presence of solitary-pulse-type and Gaussian-shaped external forces. To study the behavior of dust–ion acoustic solitary waves (DIASWs), a... | Influences of External Excitations on Solitary Waves in Nonthermal Dusty Plasma | 10.1134/S1063780X22100063 |
2022-09-01 | Purpose The idea is based on the usage of dynamic vibration absorber for simultaneous reduction of oscillations and energy recovery. The analyzed system consists of two main components: an oscillator (damped part) and a pendulum (tuned mass damper). The rotatory harvester device is mounted in the pendulum’s hanging. Th... | Nonlinear Dynamics and Energy Recovery of a Vibration Absorber/Harvester System with an Adaptive Suspension | 10.1007/s42417-022-00536-6 |
2022-09-01 | Due to the inaccurate injury assessment model of human body impact, it is hard to reasonably determine the motion speed limit of a collaborative robot in human-robot collaborative operations. In this paper, to achieve a more accurate injury assessment, an improved human-robot impact model is proposed based on equivalen... | An Improved Equivalent Impact Model of Human Thorax for Human-Robot Collaboration | 10.1007/s41315-021-00213-z |
2022-08-30 | In this paper we study the global (in time) existence of small data Sobolev solutions to the Cauchy problem for semilinear $$\sigma $$ σ -evolution models with friction and visco-elastic damping and with a power nonlinearity, namely, $$\begin{aligned} \left\{ \begin{array}{ll} u_{tt}+ (-\Delta )^\sigma u + u_t +(- \Del... | Semilinear
$$\sigma $$
σ
-evolution models with friction and visco-elastic type damping | 10.1007/s00030-022-00795-y |
2022-08-30 | The analysis of vibration over coated sample is required to investigate the vibration and noise damping behaviors of coatings. In this research work, conventional gun spray method is used to coat oxime modified titanium (IV) isopropoxide on steel to find out damping behaviour of coating. The most conventional method mo... | Vibration and noise analysis of acetoxime modified TiO_2 coating over steel alloy | 10.1007/s12008-022-01023-8 |
2022-08-26 | A container partially filled with loose plastic granules was attached to the shovel of the snowboard to suppress large-amplitude lateral vibrations by dissipating energy through non-conservative multi-granule interactions. A custom laboratory stand allowed to evaluate the performance using a full-scale snowboard deck. ... | Evaluation of instantaneous vibration parameters of a snowboard with a prototype granular dissipator | 10.1007/s12283-022-00382-5 |
2022-08-24 | Over the past decades, many vibration control devices have been invented to enhance the integrity of structures and improve their safety when subjected to seismic actions. A review of viscoelastic dampers (VD) has been presented in this paper. These dampers are considered to be one of the most effective and economic pa... | Viscoelastic dampers for protection of structures against seismic actions | 10.1007/s41062-022-00905-w |
2022-08-20 | In this paper, we consider a wave equation with frictional damping and viscoelastic damping acting simultaneously and complementarily in the domain, and study the effect of such competition between the two types of damping on the asymptotic behavior of the energy function. Under nonrestrictive assumptions, we combine b... | Optimal Decay Result for Wave Equations with Frictional Versus Viscoelastic Damping | 10.1007/s12591-022-00611-0 |
2022-08-02 | This paper is devoted to investigating the initial boundary value problem for a semilinear wave equation with strong damping and scattering damping on an exterior domain. By introducing suitable multipliers and applying the test-function technique together with an iteration method, we derive the blow-up dynamics and an... | Blow-up of solution to semilinear wave equations with strong damping and scattering damping | 10.1186/s13661-022-01634-w |
2022-08-01 | This paper proposes a novel constant force tracking control scheme based on an impedance controller with online stiffness and reverse damping force (OSRDF) to track desired force. An interaction contact force between the robot end-effector and its environment was represented and analyzed using the full mechanical secon... | Constant force tracking using online stiffness and reverse damping force of variable impedance controller for robotic polishing | 10.1007/s00170-022-09599-x |
2022-08-01 | The steady-state dynamic response of a single-degree-of-freedom system comprising both a hysteretic element and a spring is considered. The Hertz–Cattaneo–Mindlin theoretical framework for modeling of local tangential contact with friction is applied in conjunction with the Masing model of hysteresis to describe the hy... | A hysteretic model of localized frictional contacts with instrumental stiffness | 10.1007/s11012-022-01549-x |
2022-08-01 | This study concerns the response of a spherical drop, attached to a sinusoidally vibrating wall. Given that the drop is spherical, the model is more realistic than that of a 2D drop described in [1], with which the results are compared. As in that study, the moving contact line is modelled by a Navier-type wall boundar... | The response of a spherical droplet on a wall executing small sinusoidal vibrations | 10.1007/s11012-022-01545-1 |
2022-08-01 | The vibration and damping characteristics of carbon nanotubes reinforced (CNTR) skewed shell structure under a hygrothermal environment have been investigated using the finite element method. CNT as reinforcing phase and polymer as matrix phase are considered for the nanocomposites (NCs) based viscoelastic skewed shell... | Vibration and damping characteristics of CNTR viscoelastic skewed shell structures under the influence of hygrothermal conditions | 10.1007/s00366-021-01411-w |
2022-08-01 | Although the complex structure-preserving method presented in our previous studies can be used to investigate the orbit–attitude–vibration coupled dynamic behaviors of the spatial flexible damping beam, the simulation speed still needs to be improved. In this paper, the infinite-dimensional dynamic model describing the... | Symplectic Analysis on Coupling Behaviors of Spatial Flexible Damping Beam | 10.1007/s10338-021-00297-x |
2022-08-01 | We present a method, named the variable damping factor selecting method, to select reliable Euler solutions. Our method considers the influence of small perturbations on the movement of Euler solutions as a selection criterion. Small perturbations have little influence on the least-squares solution generated from a sta... | Euler solution selecting method based on the damping factor | 10.1007/s11600-022-00804-9 |
2022-08-01 | Under-platform dampers (UPDs) are commonly used to adapt turbine blade vibration characteristics by friction. However, acquiring their effect on the forced vibration of high-speed rotating blades is difficult. In this paper, the blade vibration experiments with atomised liquid-jet excitation in high-speed rotation were... | Effect of under-platform dampers on the forced vibration of high-speed rotating blades | 10.1007/s12206-022-0707-4 |
2022-08-01 | In this article, Al/SiC composites with varying reinforcement of 5, 10 and 15 % by weight were produced using powder metallurgy route. The samples were sintered at 550 °C ± 5 °C in a microwave furnace. Damping capacity (tanδ) and storage modulus (E’) of the fabricated samples were measured using dynamic mechanical anal... | Damping Behavior of Al/SiC Composites Fabricated by Powder Metallurgy | 10.1007/s12633-021-01497-3 |
2022-08-01 | The dynamics of brushless DC motor (BLDCM) is studied in detail from the viscous damping coefficient, a mechanical parameter. While this parameter intervenes in determining the dissipativity of the system; it shows the high complexity of the brushless DC motor. The pitchfork bifurcation is revealed. The Hopf bifurcatio... | Local bifurcation of brushless DC motor through a mechanical parameter: the viscous damping coefficient | 10.1007/s40435-021-00883-4 |
2022-08-01 | Stochastic resonance (SR) phenomenon for a fractional linear oscillator with memory-inertia and memory-damping kernels subject to multiplicative noise and additive noise is investigated. The correlation intensity between the two noises is modeled as a time-modulated one. The amplitude gains for the input signal and tha... | Stochastic resonance for a fractional linear oscillator with memory-inertia and memory-damping kernels subject to dichotomous time-modulated noise | 10.1007/s12648-021-02226-7 |
2022-08-01 | Brake squeal in friction brakes is a typical audible noise phenomenon in vehicles leading to high development and sometimes warranty costs for the suppliers. The friction forces generated during braking are responsible for self-excited vibrations in the audible frequency range starting from $$1\hbox { kHz}$$ 1 kHz . In... | Friction-induced noise in drum brakes: finite-element modeling and experiments with special focus on damping | 10.1007/s00419-022-02189-z |
2022-08-01 | The stiffness and damping of the fluid pivot journal bearing (FPJB) which has been selected as the subject of study in this paper are systematically investigated. Based on the FPJB structure and principle of operation, geometrical models have been established and numerical methods (FDM) are used to determine the floati... | Effect of Structural Parameters on Dynamic Characteristic of Fluid Pivot Journal Bearing | 10.1007/s40032-022-00842-8 |
2022-08-01 | Magnetorheological (MR) fluid properties are essential in analyzing the performance of any MR fluid system. The fluid properties are dependent on shape, size, and magnetic saturation of the magnetic particles. Preliminary characteristics with SEM, particle size analysis (PSA), and vibration sample magnetometer (VSM) on... | Impact of increased particle concentration on magnetorheological fluid properties and their damping performance | 10.1007/s13367-022-00029-8 |
2022-08-01 | Blast polishing offers an operator-friendly solution to many of the previously encountered polishing difficulties. However, the process lacks studies into the control of key parameters, one of which is viscoelasticity (particularly present in biological-based abrasive medias). Together with analytical-empirical models,... | Spring-dashpot vibrational model for the investigation of viscoelasticity in gelatinous abrasive media and subsequent control of parameters for the blast polishing of Ti-6Al-4 V alloy | 10.1007/s00170-022-09863-0 |
2022-08-01 | The main motivation of the present study is to propose a new framework of multi-objective brain emotional learning-based intelligent controller (MOBELBIC) for tuning the command voltage of MR dampers in real-time for smart base-isolated structures. To address the main goal of the seismic control of such structures i.e.... | A new framework of multi-objective BELBIC for seismic control of smart base-isolated structures equipped with MR dampers | 10.1007/s00366-021-01414-7 |
2022-08-01 | Lossless positive-real systems have been widely studied in the literature. They are systems in which the energy is entirely transferred between input and output. In this paper, new aspects related to the linear quadratic gaussian (LQG) control of lossless positive-real systems are reported including both the continuous... | LQG control of linear lossless positive-real systems: the continuous-time and discrete-time cases | 10.1007/s40435-021-00857-6 |
2022-07-30 | In this paper, we consider the general decay of solutions for the weak viscoelastic equation of Kirchhoff type containing Balakrishnan–Taylor damping with nonlinear delay and acoustic boundary conditions. By using suitable energy and Lyapunov functionals, we prove the general decay for the energy, which depends on the ... | General decay for weak viscoelastic equation of Kirchhoff type containing Balakrishnan–Taylor damping with nonlinear delay and acoustic boundary conditions | 10.1186/s13661-022-01633-x |
2022-07-28 | Nowadays, thin-walled structures are used as energy dampers in various industries to increase energy absorption. This study aims to improve the crashworthy performance and ductility of the simple thin-walled aluminum foil square tube structure and reduce its weight by making different slot shapes. Various slots have be... | Numerical and experimental investigation of energy absorption capacity in slotted thin-walled square tube structures | 10.1007/s40430-022-03677-7 |
2022-07-23 | Abstract This research work proposes an equivalent approach modelling the peculiar hysteretic behavior of passive variable friction damper, for engineers who call for a simplified way to simulate such damper in anti-earthquake engineering practice with acceptable accuracy. This approach models the special nonlinear beh... | An equivalent approach for modelling butterfly-hysteresis passive variable friction damper | 10.1007/s42452-022-05098-6 |
2022-07-22 | In this paper, we consider a one-dimensional coupled Timoshenko type system in the light of the second spectrum of frequency (no blow-up on second wave speed) with a single weakly nonlinear feedback acting only on the angular rotation. Without imposing any restrictive growth assumption near the origin on the damping te... | Impact of the Damaging Consequences of the Second Spectrum on the Stabilization of Nonlinear Timoshenko Systems | 10.1007/s10440-022-00516-8 |
2022-07-18 | This paper studies the long-time behavior of solutions for a transmission problem of Timoshenko beam with memory. We show that the stability of the system holds for a much larger class of relaxation functions and get better decay rate than the ones existing in the literature. We also give some numerical tests to valida... | Uniform energy decay rates for a transmission problem of Timoshenko system with two memories | 10.1007/s00033-022-01799-5 |
2022-07-15 | Bentonites have good application in solid walls, waterproof materials, and landfill cushions, but the cushions of landfills in seasonal frozen regions are susceptible to the effects of freeze–thaw cycles, overhead dynamic loads, and landfill leachate, which can lead to strength change and structural instability. In thi... | Effect of freeze–thaw cycles on the dynamic parameters of modified Na^+-bentonite by different cations | 10.1007/s10064-022-02812-x |
2022-07-11 | In this paper, we study the direct/indirect stability of locally coupled wave equations with local Kelvin-Voigt dampings/damping, where we assume that the supports of the dampings and the coupling coefficients are disjoint. First, we prove the well-posedness, strong stability, and polynomial stability for some one dime... | Stability results of locally coupled wave equations with local Kelvin-Voigt damping: Cases when the supports of damping and coupling coefficients are disjoint | 10.1007/s40314-022-01956-6 |
2022-07-06 | We study the effect of heating–cooling imbalance on slow magnetohydrodynamic waves in solar coronal loops with time-varying background temperature in the presence of thermal conduction, optically thin radiation and heating. The MHD equations governing the plasma motion are solved numerically to examine the effects of h... | Effect of heating–cooling imbalance on slow mode with time-dependent background temperature | 10.1007/s12036-022-09824-9 |
2022-07-06 | Non-linear fluid viscous dampers have found widespread applications in engineering practice for seismic mitigation of civil structures. Topology optimization has emerged as an appealing means to achieve the optimal design of non-linear viscous dampers in terms of both layouts and parameters. However, the conventional m... | Topology optimization of non-linear viscous dampers for energy-dissipating structures subjected to non-stationary random seismic excitation | 10.1007/s00158-022-03281-2 |
2022-07-05 | Compacted clay-aggregate composites are extensively utilized or found in various geotechnical engineering projects such as the core of earth embankment dams, the pile foundation of offshore structures, or the impervious blankets in waste disposal landfills. In this study, data from resonant column tests at small shear ... | Analysis of the stiffness and damping characteristics of compacted sand-in-fines granular composites: a multiscale investigation | 10.1007/s10035-022-01247-1 |
2022-07-01 | Background Magneto-Rheological (MR) fluids are made—up of iron particles suspended in carrier liquid containing additives in proportion to make reversible changes to the whole suspension rheological properties (apparent viscosity, shear stress). MR dampers have generated a lot of interest amongst researchers in the las... | Development of Low-Cost Optimal Magneto-rheological Damper for Automotive Application | 10.1007/s42417-022-00486-z |
2022-07-01 | Synthetic Aperture Radar (SAR) plays a major role in identifying oil spills on the sea surface. However, obtaining information of oil spill thickness (volume) is still a challenge. Emulsification is an important process affecting the thickness and normalized radar cross section (NRCS) of oil film. Experiments of crude ... | Experimental research on oil film thickness and its microwave scattering during emulsification | 10.1007/s00343-021-1183-x |
2022-07-01 | In this paper, the analytical blowup solutions of the N-dimensional radial symmetric compressible Euler equations are constructed. Some previous results of the blowup solutions for the compressible Euler equations with constant damping are generalized to the time-depending damping case. The generalization is untrivial ... | Analytical Blowup Solutions to the Compressible Euler Equations with Time-depending Damping | 10.1007/s10255-022-1100-x |
2022-07-01 | This paper proposes a novel current feedback-free speed regulation method for servo systems subject to system parameter and load uncertainties. The proposed solution has two features. First, the position measurement from the rotary encoder constitutes the speed and acceleration estimates for control loops through a pos... | Nonlinear output-feedback speed servo systems through active damping injection and position filtering approaches without current feedback | 10.1007/s43236-022-00451-9 |
2022-07-01 | Direct modal analysis of second-order systems with damping is generally not possible unless the damping and stiffness matrices commute, thereby admitting simultaneous diagonalization. When these matrices do not commute, the so-called complex-stiffness damping method has been employed to great effect, but the existing f... | A dual-oscillator approach to complex-stiffness damping based on fourth-order dynamics | 10.1007/s11071-022-07597-y |
2022-07-01 | This study is aimed at investigating the effects of anisotropic supports on the stability of slender rotors parametrically excited by external loads. An axisymmetric shaft described by scaling a spinning Timoshenko beam on anisotropic supports is studied, loaded by oscillating axial end thrust and twisting moment, with... | Effects of anisotropic supports on the stability of parametrically excited slender rotors | 10.1007/s11071-022-07487-3 |
2022-07-01 | An investigation on seismic response characteristics and modal parameters of a cable-stayed bridge with movable bearings using vibration records obtained from a seismic monitoring system is presented in this paper. The object of this study is the Tokachi cable-stayed bridge, a single plane prestressed cable-stayed brid... | Influence of movable bearings performance on the dynamic characteristics of a cable-stayed bridge : insights from seismic monitoring records | 10.1007/s10518-021-01282-y |
2022-07-01 | Equations and relations have been obtained for describing one-dimensional filtration waves in a homogeneous isotropic porous medium in plane, radial, and spherical cases. To this end, use was made of the equation of motion of a liquid phase with account taken of frictional forces, which in the case of stationary filtra... | Filtration Waves | 10.1007/s10891-022-02559-y |
2022-07-01 | This paper presents a single-degree-of-freedom (SDOF) constitutive model for assessing the performance of freestanding block contents of buildings. The model incorporates a bespoke damper to account for energy dissipation associated with rocking. It is advantageous in its direct correlation, via energy conservation, to... | A discretely damped SDOF model for the rocking response of freestanding blocks | 10.1007/s11803-022-2085-4 |
2022-07-01 | This work formulates a comprehensive model of a nonlinear aeroelastic system developed for the analysis of complex aeroelastic phenomena related to structural and aerodynamic nonlinearities. The system is formulated as a two-dimensional cantilevered elastica with a rigid airfoil section firmly attached at its tip under... | Nonlinear aeroelastic analysis of a damped elastica-aerofoil system | 10.1007/s11071-022-07479-3 |
2022-07-01 | The damping properties of fluorinated polyacrylate (FPA) composites with expanded graphite (EG) partially substituted for mica as fillers have been studied. EG was prepared by a rapid expansion method by microwave (MW) irradiation. The effects of the EG and natural graphite (NG) as partial substitutions for mica and th... | Damping properties of expanded graphite filled fluorinated polyacrylate composites | 10.1007/s00289-021-03711-z |
2022-07-01 | The Mg- x Zn- y Ga ( x + y = 1 at.%) alloys are prepared by high strain rate rolling at 300 °C with the rolling strain rate of 9.1 s^−1. The effects of the Zn/Ga ratio on microstructure, mechanical, damping and thermal properties of the as-rolled alloys are investigated by x-ray diffraction, tensile testing, dynamic... | Effect of Zn/Ga Ratio on Damping and Thermal Behaviors of Fine-Grained Mg-Zn-Ga Sheets | 10.1007/s11665-022-06605-x |
2022-07-01 | Gas turbine generator sets are widely used in IGCC system, gas-steam combine cycle, distributed energy system et al. for its advantages of low pollution, high efficiency, quick start and stop. The structure of gas turbine rotor can be divided into integral rotor and rod-fastened rotor. Experimental study shows that the... | Study on the bistable vibration behaviour of a rod-fastened rotor-bearing system | 10.1007/s11071-022-07501-8 |
2022-07-01 | Background The architected mechanical metastructures have garnered significant research attention for various engineering applications due to their remarkable mechanical properties and unique deformation behavior. The lattice-based micro-structured materials have shown enhanced mechanical properties and the ability to ... | Energy Absorption of Hourglass Shaped Lattice Metastructures | 10.1007/s11340-022-00840-y |
2022-07-01 | This paper mainly focus on the global existence of the strong solutions for the generalized Navier-Stokes equations with damping. We obtain the global existence and uniqueness when $$\alpha \ge {5 \over 4}$$ α ≥ 5 4 for β ≥ 1 and when $${1 \over 2} + {2 \over \beta} \le \alpha \le {5 \over 4}\,{\rm{for}}\,\,{8 \over 3}... | Global Existence of Strong Solutions for the Generalized Navier-Stokes Equations with Damping | 10.1007/s10255-022-1106-4 |
2022-07-01 | Aerospace thin-walled parts vibrates during the process of milling due to their characteristics of low rigidity, which influences the machining quality of the workpiece. Based on the characteristics of magnetorheological fluid excitation solidification, a magnetorheological damping fixture is designed to semi-actively ... | An improved dynamics modeling during milling of the thin-walled parts based on magnetorheological damping fixture | 10.1007/s00170-022-09489-2 |
2022-07-01 | Nonlinearity can take an important and critical role in engineering systems, and thus cannot be simply ignored in structural design, dynamic response analysis, and parameter selection. A key issue is how to analyze and design potential nonlinearities introduced to or inherent in a system under study. This is a must-do ... | The X-structure/mechanism approach to beneficial nonlinear design in engineering | 10.1007/s10483-022-2862-6 |
2022-07-01 | The article considers theoretical and experimental aspects of determining the dynamic characteristics of a water rotary pump with an adjustable wide-frequency platelike damper of dynamic vibrations (DDV). To solve this problem, a computational model of the mechanical oscillatory system pump–DDV was developed, and the a... | Calculation-and-Experimental Determination of the Dynamic Characteristics of a Rotary Pump with a Platelike Dynamic Vibration Damper | 10.1007/s11223-022-00434-y |
2022-07-01 | Purpose Track irregularities and wheel-track interaction in rail vehicles travelling at high speeds cause excessive vibrations in the train body, which affect travellers by declining ride comfort. Suspension systems play an essential role in mitigating vibration and enhancing ride comfort. In this context, secondary la... | Modelling and Analysis of a Passenger Train for Enhancing the Ride Performance Using MR-Based Semi-active Suspension | 10.1007/s42417-022-00479-y |
2022-07-01 | Purpose The novel metallic damper device for passive vibration control of structures, which is designed primarily for seismic protection of buildings, is described in this paper. It consists of the base plate, fixed into foundation, with two concentric cycles of vertical components and a middle steel activating plate a... | Experimental and Numerical Study of Energy Dissipation Components of a New Metallic Damper Device | 10.1007/s42417-022-00485-0 |
2022-06-30 | We introduce the new concepts of pseudo numerical range for operator functions and families of sesquilinear forms as well as the pseudo block numerical range for $$n\!\times \! n$$ n × n operator matrix functions. While these notions are new even in the bounded case, we cover operator polynomials with unbounded coeffic... | Pseudo Numerical Ranges and Spectral Enclosures | 10.1007/s11785-022-01232-9 |
2022-06-28 | This paper is concerned with the Cauchy problem for semilinear wave equation with space-dependent scattering damping and combined nonlinearities. The blowup results of solution are established by introducing proper test functions. Moreover, upper bound lifespan estimates of a solution to the Cauchy problem with small i... | Blowup for semilinear wave equation with space-dependent damping and combined nonlinearities | 10.1186/s13662-022-03719-3 |
2022-06-23 | We present a generalised Lindblad equation (GLE) for position-dependent mass (PDM). Using the GLE, we obtain the probability density, Fisher information (FI), Von Neumann entropy and the quantum Fisher information (QFI) in two different generalised Jang and Dekker cases. The behaviours of the above measures are analyse... | Jang and Dekker oscillators in position-dependent mass formalism | 10.1007/s12043-022-02366-3 |
2022-06-20 | In this paper, we consider the global existence and blow up mechanism of classical solutions for one dimensional isentropic compressible Euler equations with over damping term like $$\mu (1+t)^{\lambda } v$$ μ ( 1 + t ) λ v , where $$\mu >0$$ μ > 0 and $$\lambda >0$$ λ > 0 are physical parameters. Using wave decomposit... | Classical Solutions for 1D Compressible Euler Equations with Over Damping | 10.1007/s00021-022-00709-z |
2022-06-16 | Perpendicular magnetic anisotropy-based magnetic tunnel junctions (p-MTJs) with low Gilbert damping constant (α) are of particular interest for fast and low-power consumption magnetic random-access memory (MRAM). However, obtaining a faster switching speed and lower power consumption is still a big challenge. Herein, w... | Mo-based perpendicularly magnetized thin films with low damping for fast and low-power consumption magnetic memory | 10.1007/s11433-021-1875-6 |
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