publicationDate stringlengths 10 10 | abstract stringlengths 0 37.3k | title stringlengths 1 5.74k | doi stringlengths 11 47 ⌀ |
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2023-04-01 | Purpose The main purpose of this study was to investigate the effect of dampers equipped with shape memory alloys where steel connections equipped with slit dampers were used. For this purpose, 16 models equipped with SMA dampers were developed, SMA dampers have different lengths and stiffness. Methods In this study, a... | Evaluating the Effectiveness of a Shape Memory Alloy on a Connection Equipped with Slit Damper | 10.1007/s42417-022-00640-7 |
2023-04-01 | In this paper, the influence of ground motion duration on the inelastic displacement ratio, C_1, of highly damped SDOF systems is studied. For this purpose, two sets of spectrally equivalent long and short duration ground motion records were used in an analysis to isolate the effects of ground motion duration on. The e... | Effect of ground motion duration on inelastic displacement ratio of SDOF systems | 10.1007/s11803-023-2169-9 |
2023-04-01 | This study proposes a novel design and micromachining process for a dual-cantilever accelerometer. Comb and curved-surface structures are integrated into the sensing structure to modulate the squeeze-film damping, thus effectively optimizing the response frequency bandwidth. Owing to the high stress concentration on th... | High-Performance Single-Side Fabricated (111)-Silicon Dual-Cantilever Accelerometer with Squeeze-Film Air Damping Modulation | 10.1007/s12204-021-2288-2 |
2023-04-01 | Many vibrating systems, over some ranges of parameter values, exhibit a single unstable mode. Adding a small resonant secondary system to the unstable system is a well-known stabilization strategy. Here we show that even a nonresonant secondary system, if equipped with a limit cycle of its own, can stabilize the unstab... | Vibration stabilization by a nonresonant secondary limit cycle oscillator | 10.1007/s11071-022-08145-4 |
2023-04-01 | In this paper, a fault-tolerant control method for an input-series output-parallel modular grid-tied pulse-width modulation (PWM) current source inverter is proposed to address the most commonly seen single symmetrical gate-commutated thyristor (SGCT) open-circuit fault problems. This method actively offsets the neutra... | Fault tolerant control strategy for modular PWM current source inverter | 10.1007/s11708-022-0852-6 |
2023-04-01 | One of the widely used control devices is a tuned mass damper (TMD) due to its simplicity and cost-efficiency. Although using the TMD is so promising, there are still some challenging tasks; obtaining optimum design parameters and optimum placements of a structure plays a vital role in the effectiveness of a TMD. In ad... | Analysis of Different Placement Strategies of Multi-Tuned Mass Dampers Placed in Building Height | 10.1007/s13369-022-07440-x |
2023-04-01 | This paper presents an Active Tuned Mass Damper (ATMD) control approach for vibration reduction applied to a one-bay three-story scaled shear frame. The ATMD is composed of a Tuned Mass Damper (TMD) driven by the combined action of a modified Positive Position Feedback (mPPF) control law and a Model Predictive Controll... | Vibration Control Using a Positive Position Feedback-based Predictive Controller Applied to a One-Bay Three-Story Scaled Shear Frame | 10.1007/s42417-022-00613-w |
2023-04-01 | When the control moment gyroscope, momentum wheel, solar array drive mechanism, antenna drive mechanism, and refrigerator on spacecraft work, they produce micro-vibration, which seriously affects the accuracy of observation equipment. It is an effective way to suppress micro-vibration to install a vibration isolation d... | A reduced-order model of the three-parameter fluid viscous damper with consideration of fluid compressibility and bellows volume deformation | 10.1007/s11071-022-08211-x |
2023-04-01 | A novel cambered surface steel tube damper (CSTD) with a cambered surface steel tube and two concave connecting plates is proposed herein. The steel tube is the main energy dissipation component and comprises a weakened segment in the middle, a transition segment, and an embedded segment. It is believed that during an ... | Hysteretic behavior of cambered surface steel tube damper: Theoretical and experimental research | 10.1007/s11709-023-0925-6 |
2023-04-01 | Purpose The axial vibration of short fiber reinforced composite nanorods is investigated for the first time in this paper. Short fibers are randomly distributed or aligned in composite nanorods. Methods Nonlocal elasticity theory has been employed in the analysis. In addition to analytical solution of axial vibration p... | On the Axial Vibration of Viscously Damped Short-Fiber-Reinforced Nano/Micro-composite Rods | 10.1007/s42417-022-00643-4 |
2023-04-01 | This paper examines the optimized parameters for tuned mass dampers (TMDs) to reduce seismic vibrations of tall buildings; with soil–structure interaction effects (SSI). To illustrate the results, earthquake data are applied to the model and the jellyfish search optimization (JSO) method is used to obtain the best para... | Jellyfish search optimization for tuned mass dumpers for earthquake oscillation of elevated structures including soil–structure interaction | 10.1007/s42107-022-00530-z |
2023-04-01 | With advances in construction techniques and building materials, lightweight and flexible structures have been widely developed. Its light mass, low damping, and low frequency properties make it extremely vulnerable to human-induced vibration. Researchers have found that occupancy of a crowd would increase the damping ... | Identification of Human Body Dynamics from a Human-Structure System: An Experimental Study | 10.1007/s40799-022-00548-7 |
2023-04-01 | This study aims to investigate the performance of nonlinear viscous damper (NVD) in seismic vibration control of reinforced concrete moment-resisting frames. To this aim, five RC moment frames (1-, 2-, 4-, 8-, and 12-stories) with and without NVD were examined. To evaluate the seismic behavior of the models, different ... | Seismic Vibration Control of Moment-Resistant Concrete Frames Using Nonlinear Viscous Dampers | 10.1007/s40996-022-00916-8 |
2023-04-01 | In this study the efficiency of Semi Active Tuned Mass Damper (STMD) on seismic response reduction in a moment resisting frame steel building considering soil-pile-structure interaction is investigated in comparison with common Tuned Mass Damper (TMD). Substructure method is used for simulating the Soil-Pile-Structure ... | Seismic Performance Assessment of Semi Active Tuned Mass Damper in an MRF Steel Building Including Nonlinear Soil–Pile–Structure Interaction | 10.1007/s13369-022-07138-0 |
2023-03-31 | We develop a virtual element method for weakly damped wave equations on polygonal meshes. Very general polygonal meshes are used for the spatial discretization. In both $$L^{2}$$ L 2 norm and $$H^{1}$$ H 1 semi-norm, optimal order of convergence is obtained for the spatially discrete approximation. We employ the Crank–... | Virtual element methods for weakly damped wave equations on polygonal meshes | 10.1007/s40314-023-02252-7 |
2023-03-29 | In this note, we investigate again the blow-up phenomenon of weak solutions to the following initial-boundary value problem of the fourth-order equation with variable-exponent nonlinearity $$\begin{aligned} u_{tt}+\Delta ^2 u-M(\Vert \nabla u\Vert _2^2)\Delta u-\Delta u_t+|u_t|^{m(x)-2}u_t=|u|^{p(x)-2}u. \end{aligned}$... | Blow-Up of Solutions to the Fourth-Order Equation with Variable-Exponent Nonlinear Weak Damping | 10.1007/s00009-023-02391-5 |
2023-03-13 | In this paper, we are devoted to the study of a problem proposed in Aujol and Dossal (SIAM J Optim 29:3131–3153, 2019), which concerns the optimal convergence rates for damped inertial gradient dynamics with flat geometries. Fortunately, we find a solution to the problem. More specifically, we obtain an optimal decay r... | Optimal Convergence Rates for Damped Inertial Gradient Dynamics with Flat Geometries | 10.1007/s00245-023-09966-4 |
2023-03-09 | We consider the Euler-Bernoulli beam equation with a local Kelvin-Voigt dissipation type in the interval ( − 1 , 1 ) $(-1,1)$ . The coefficient damping is only effective in ( 0 , 1 ) $(0,1)$ and is degenerating near the 0 point with a speed at least equal to x α $x^{\alpha }$ where α ∈ ( 0 , 5 ) $\alpha \in (0,5)$ . We... | Stability for Euler-Bernoulli Beam Equation with a Local Degenerated Kelvin-Voigt Damping | 10.1007/s10440-023-00559-5 |
2023-03-01 | A new gravity sensor based on electromagnetic damping for the JMGrav marine gravimeter is presented. The new gravity sensor considered the advanced construction methods of the electromagnetic damping system of the gravimeter. The design features of the new system are discussed and the research survey data in the South ... | A marine gravimeter based on electromagnetic damping and its tests in the South China Sea | 10.1007/s00343-022-2110-5 |
2023-03-01 | The soil nonlinear hysteretic behaviour is usually described, in the moderate strain range, through the shear modulus reduction and material damping ratio (MRD) curves. In common practice, in absence of specific laboratory tests, the curves are estimated by employing empirical regression models. Such predictive models,... | The PoliTO–UniRoma1 database of cyclic and dynamic laboratory tests: assessment of empirical predictive models | 10.1007/s10518-022-01573-y |
2023-03-01 | This work entails an analysis of secondary resonances in the parametrically damped van der Pol equation, with and without external excitation. A potential application of this system is a vertical-axis wind-turbine blade, which can have cyclic damping, aeroelastic self-excitation, and direct excitation. We analyze the s... | Resonances of a forced van der Pol equation with parametric damping | 10.1007/s11071-022-08026-w |
2023-03-01 | This paper is devoted to stabilizing an ODE-PDE coupled system with boundary disturbance, where the PDE is chosen to be a wave equation with viscous damping. Applying the active disturbance rejection control (ADRC) technic, the unknown disturbance is estimated by the extended state observer (ESO). Assuming the absence ... | Stabilization of a Coupled ODE-wave System with Disturbances | 10.1007/s12555-021-1068-y |
2023-03-01 | To dampen periodic off-levelling motions within an inertial platform while undergoing horizontal accelerations of the same period and to achieve a levelling accuracy of a few tens of arcseconds with that system, an internally damped inertial platform for a marine scalar gravity system was the developed. Methods for att... | An internally damped inertial platform for marine gravimetry and a test case in the South China Sea | 10.1007/s00343-023-2337-9 |
2023-03-01 | An integral evolutionary model is constructed for calculating the thickness and flow rate of a fluid in a turbulent wave film, moving under the influence of gravity and tangential stress of a gas stream. Derivation of the model equations requires conditionally averaged Navier–Stokes equations with turbulent viscosity, ... | An integral model for turbulent wave liquid film | 10.1134/S0869864323020105 |
2023-03-01 | Underground structures such as tunnels are one of the important elements in the transportation network that may show different seismic behavior compared to structures built on the ground due to being buried in the ground and bearing high stresses. Therefore, it is very important to pay attention to the behavior of thes... | Effect of a Shock-Absorbing Material on Seismic Responses of the Longitudinal Buried Tunnel Using Theoretical Analysis and Finite Element Modeling | 10.1007/s10706-022-02330-3 |
2023-03-01 | Generator tripping strategies are generally decided by offline transient stability analysis. However, traditional methods can hardly ensure dynamic stability after GT. Simulation tests show that GT strategies change the topology and the state variables of a power system, which may weaken the system damping after GT. In... | A Novel Method to Estimate the System Damping After Generator Tripping | 10.1007/s42835-022-01261-6 |
2023-03-01 | In this study, we design ultralow density Mg−8.4Li (~ 1.46 g/cc), and Mg-9Li (~ 1.44 g/cc) alloys processed by Disintegrated Melt Deposition (DMD) having extraordinary properties outperforming the existing commercial magnesium (Mg) alloys in terms of specific strength, strain hardening ability and ductility. The develo... | Development of Ultralight Binary Mg-Li Alloys: Enhancing Damping, Ductility, and Ultimate Compressive Strength beyond 2000 MPa | 10.1007/s11665-022-07335-w |
2023-03-01 | The motion of both internal and surface waves in incompressible fluids under capillary and gravity forces is a major research topic. In particular, we review the derivation of some new models describing the dynamics of gravity-capillary nonlinear waves in incompressible flows. These models take the form of both bidirec... | Interfaces in incompressible flows | 10.1007/s40324-021-00283-w |
2023-03-01 | Inter-story isolation system (IIS) is increasingly being sought to add floors on top of existing buildings while controlling their base shear forces. One of the main issues with this application is the need to control the drift between the two structural parts and the acceleration of the superstructure, while optimizin... | Multi-objective optimization of the inter-story isolation system used as a structural TMD | 10.1007/s10518-022-01592-9 |
2023-03-01 | Supercritical transmission shafts, which have one or more critical speeds below their working speeds, are becoming more popular in new rotorcraft designs. To attenuate the excessive transcritical vibration, dry friction damper is a prevailing choice. In this paper, we focus on the basic working mechanism and parameter ... | Nonlinear modelling and parameter influence of supercritical transmission shaft with dry friction damper | 10.1007/s10999-022-09625-6 |
2023-03-01 | In this paper, the main purpose is to study existence of the global attractor for the weakly damped wave equation with gradient type nonlinearity. To this end, we first verify the existence and uniqueness of global weak solution by the Galerkin method and compulsively variational method. Furthermore, we obtained the gl... | Global Attractors for a Class of Weakly Damped Wave Equations with Gradient Type Nonlinearity | 10.1007/s44198-022-00079-0 |
2023-02-28 | In this paper, we consider the initial-boundary value problems with several fundamental boundary conditions (the Dirichlet/Neumann/Robin boundary condition) for the multi-component system of semi-linear classical damped wave equations outside a ball. By applying a test function approach with a judicious choice of test ... | Blow-up and lifespan estimates for solutions to the weakly coupled system of nonlinear damped wave equations outside a ball | 10.1007/s00028-023-00875-1 |
2023-02-27 | Quantum speed limit (QSL) represents the minimum evolution time of a quantum system. We investigate the QSL time of a two-level qubit in a phase-damping channel. By manipulating measurement-based feedback controls on the qubit, we show that the QSL time of the qubit can have an obvious decline when the measurement rate... | Quantum Speed Limit Under the Influence of Measurement-based Feedback Control | 10.1007/s10773-023-05318-8 |
2023-02-21 | The paper investigates the well-posedness and the complete regularity of the weak solutions, and the existence of strong global attractor for the strongly damped wave equation with critical nonlinearities on $$\mathbb {R}^3: u_{tt}-\Delta u-\Delta u_{t}+h(x,u_t)+g(x,u)=f(x)$$ R 3 : u tt - Δ u - Δ u t + h ( x , u t ) + ... | Complete regularity and strong attractor for the strongly damped wave equation with critical nonlinearities on
$$\mathbb {R}^{3}$$
R
3
... | 10.1007/s00028-023-00872-4 |
2023-02-13 | The energy dissipation capacity (EDC) of most current configurations of yielding steel dampers is susceptible to be improved by applying optimization concepts. Thus, this study proposes a methodology to enhance the EDC of a slotted hollow cylinder steel (HCS) damper under a cyclic displacement protocol while keeping th... | A proposal for the optimization of the geometric configuration of a hollow cylindrical steel damper with slots | 10.1007/s40430-022-03919-8 |
2023-02-12 | The present study investigates the dynamic mechanical response of crump rubber filled epoxy composites. The effect of crump rubber content (0, 10, 20 and 30 vol.%) on the storage modulus, loss modulus and damping properties is assessed by experimental and theoretical approaches. The experimental storage modulus decreas... | Evaluation of dynamic mechanical analysis of crump rubber epoxy composites: experimental and empirical perspective | 10.1007/s40430-023-04033-z |
2023-02-10 | This article focuses on the oscillation and asymptotic behavior of the third-order neutral differential equation with damping and distributed deviating arguments. Some new sufficient conditions for the discussed equation are established by using a generalized Riccati transformation, which extend and improve several kno... | Oscillation and Asymptotic Behavior of the Third-Order Neutral Differential Equation with Damping and Distributed Deviating Arguments | 10.1007/s12346-022-00733-4 |
2023-02-07 | Control systems based on fuzzy logic (FL) and proportional–integral–derivative (PID) are among the effective controllers which operate using an inference mechanism rule base and control loop mechanism that continuously calculates an error value. Because of that both of them are being used as a practical solution for ma... | Experimental evaluation of ride comfort performance for suspension system using PID and fuzzy logic controllers by advanced firefly algorithm | 10.1007/s40430-023-04057-5 |
2023-02-06 | This paper investigates a transmission problem of viscoelastic wave equations with degenerate nonlocal damping. We prove the global well-posedness of the problem with the aid of Faedo–Galerkin technique and the multiplier method. Meantime, by introducing a new Lyapunov functional, we establish the optimal explicit and ... | Global well-posedness and optimal decay rates for a transmission problem of viscoelastic wave equations with degenerate nonlocal damping | 10.1007/s00033-023-01949-3 |
2023-02-02 | In this paper, we study global stability dynamics for quasilinear damped Klein–Gordon equation with variable coefficients in $${\mathbb {R}}^n$$ R n for dimension $$n\ge 1$$ n ≥ 1 , without assuming that the quasilinear term satisfies the null condition. Due to the influence of damping term, we are able to prove that i... | Global Stability Dynamics of the Quasilinear Damped Klein–Gordon Equation with Variable Coefficients | 10.1007/s12220-022-01169-7 |
2023-02-01 | Friction force microscopy (FFM) explores the interaction in a sliding contact on the nanoscale, providing information on the frictional dynamics and lateral contact stiffness with lattice resolution. Recent FFM measurements on a NaCl crystal immersed in liquid (ethanol) surroundings displayed an increase of the effecti... | Surroundings affect slip length dynamics in nanoscale friction through contact stiffness and damping | 10.1007/s40544-021-0590-5 |
2023-02-01 | Inerter-based-dampers have received substantial interest from the earthquake engineering community in the last two decades. These typically consist of an inerter, a linear spring and a viscous damper arranged into various possible configurations. In this paper, for the first time, experimental results are presented fro... | Experimental shake table validation of damping behaviour in inerter-based dampers | 10.1007/s10518-022-01376-1 |
2023-02-01 | The damping characteristic of a specific type of high-strength alloys was researched by using a dynamic mechanical analyzer (DMA) and via the application of viscoelastic damping theory. The characteristics of temperature/frequency-dependent damping and coupling factor are provided from the perspective of dynamic applic... | The Characteristics of Temperature/Frequency-Dependent Damping and Quasi-Non-Stationary Random Dynamic Method | 10.1007/s40799-021-00531-8 |
2023-02-01 | This paper deals with the following Petrovsky equation with damping and nonlinear sources: $${u_{tt}} + {\Delta ^2}u - M\left({\left\| {\nabla u} \right\|_2^2} \right)\Delta u - \Delta {u_t} + {\left| {{u_t}} \right|^{m(x) - 2}}{u_t} = {\left| u \right|^{p(x) - 2}}u$$ u t t + Δ 2 u − M ( ‖ ∇ u ‖ 2 2 ) Δ u − Δ u t + | u... | Behavior of solutions to a Petrovsky equation with damping and variable-exponent sources | 10.1007/s11425-021-1926-x |
2023-02-01 | Abstract This paper introduces a comprehensive study on vibration damping of a lumped aeroelastic wing model with translational linear and torsional nonlinear spring elements considering different actuation scenarios. The wing models have two degrees of freedom (DoFs) representing translational and torsional oscillatio... | Function Approximation Technique (FAT)-Based Adaptive Feedback Linearization Control for Nonlinear Aeroelastic Wing Models Considering Different Actuation Scenarios | 10.1134/S2070048223010106 |
2023-02-01 | An array of air chambers embedded on the tunnel track is numerically investigated for different configurations. The air chambers act as an in-tunnel countermeasure to alleviate non-linear steepening of compression waves during propagation process thereby mitigating emission of high amplitude micro-pressure waves (MPWs)... | Effect of air chambers on the compression wave propagating along a high-speed railway tunnel | 10.1007/s12206-023-0122-5 |
2023-02-01 | One of the most effective approaches for seismic protection of structural systems is isolation. The majority of existing seismic protection systems are related to horizontal ground motion and only few focus on vertical seismic components, as this would require vertical flexibility, a feature conflicting with the need f... | Vertical seismic protection of structures with inerter-based negative stiffness absorbers | 10.1007/s10518-021-01284-w |
2023-02-01 | This paper presents the network-based modeling, validation and analysis of the nonlinear liquid spring damper model under vertical landing conditions of reusable launch vehicle. The impedance function of damper model is derived first. Then, its mechanical and hydraulic networks are newly established based on the hydro-... | Analysis of liquid spring damper for vertical landing reusable launch vehicle with network-based methodology | 10.1007/s11071-022-07944-z |
2023-02-01 | Evaluating safety and stability of concrete dams in highly seismic regions is an increasing concern. Therefore, proposing an effective model that can predict crack propagation with good accuracy and low computation time is essential. The purpose of this study is to develop a special purpose finite element program for n... | Nonlinear dynamic analysis of concrete gravity dams utilizing a simplified continuum damage model and different damping algorithms | 10.1007/s42107-022-00511-2 |
2023-02-01 | Ferrofluids are a type of nanometer-scale functional material with fluidity and superparamagnetism. They are composed of ferromagnetic particles, surfactants, and base liquids. The main characteristics of ferrofluids include magnetization, the magnetoviscous effect, and levitation characteristics. There are many mature... | Typical dampers and energy harvesters based on characteristics of ferrofluids | 10.1007/s40544-022-0616-7 |
2023-02-01 | Abstract Botrytis cinerea , Rhizoctonia solani and Hemileia vastatrix are three species of phytopathogenic fungi behind major crop losses worldwide. These have been selected as target models for testing the fungicide potential of a series of bis (ylidene) cyclohexanones. Although some compounds of this chemical class a... | Synthesis of bis(ylidene) cyclohexanones and their antifungal activity against selected plant pathogenic fungi | 10.1007/s11030-022-10431-7 |
2023-02-01 | Background Façade technologies are in continuous evolution and the idea to realize buildings equipped with cladding systems capable to undergo significant displacements relatively to the main structure has been considered by many authors as an opportunity to improve their vibration performances. Method From a structura... | Vibration Damping Performances of Buildings with Moving Façades Under Harmonic Excitation | 10.1007/s42417-020-00247-w |
2023-02-01 | Flexible microporous metal rubber (FMP-MR) is a high-damping material that dissipates energy by dry friction through internal spiral metal wires in contact with each other. However, the FMP-MR energy dissipation mechanism is not fully understood owing to its disordered grid interpenetrating structure. In this work, com... | Dry friction damping mechanism of flexible microporous metal rubber based on cell group energy dissipation mechanism | 10.1007/s40544-022-0599-4 |
2023-02-01 | An inerter is a two-terminal inertial element that can produce an amplified inertance and enhanced damping when operating with spring and damping elements. Its superior vibration mitigation effect has been proved by previous studies. Although H∞ optimal design of inerter-controlled single-degree-of-freedom structure ca... | Design of MDOF structure with damping enhanced inerter systems | 10.1007/s10518-022-01381-4 |
2023-02-01 | An improved incremental harmonic balance method (IHBM) is proposed by Wang (J Sound Vib 441:111–125, 2019) to solve the periodic responses of the continuous nonlinear stiffness systems. However, the nonlinear damping systems remain unsolved. This paper aims to investigate the nonlinear damping parts by the proposed IHB... | Vibration analysis of nonlinear damping systems by the discrete incremental harmonic balance method | 10.1007/s11071-022-07953-y |
2023-02-01 | To meet the excitation frequency in the range of 0-200 Hz engine mount to achieve better noise, vibration, and harshness performance (NVH). This paper proposes a new bell plate controllable multi-inertia channel MRF (magnetorheological fluid) mount for dynamic characteristic analysis and research. Firstly, designing a ... | Dynamic Characteristic Analysis of New Bell Plate Controllable Multi-Inertia Channel MRF Mount with Wide Frequency Isolation | 10.1007/s40799-021-00539-0 |
2023-02-01 | In recent years, the tuned mass damper inerter (TMDI) has been demonstrated in several theoretical studies to be an effective vibration absorber for the seismic protection of non-isolated buildings. Its effectiveness relies on careful tuning of the TMDI stiffness and damping properties, while its performance improves w... | Optimal design and assessment of tuned mass damper inerter with nonlinear viscous damper in seismically excited multi-storey buildings | 10.1007/s10518-022-01609-3 |
2023-02-01 | Inerter-based vibration absorbers (IVAs), such as the tuned-mass-damper-inerter (TMDI), have become popular in recent years for the earthquake protection of building structures. Previous studies using linear structural models have shown that IVAs can achieve enhanced vibration suppression, but at the expense of increas... | Tuned-mass-damper-inerter optimal design and performance assessment for multi-storey hysteretic buildings under seismic excitation | 10.1007/s10518-021-01236-4 |
2023-02-01 | Inerter-based passive control devices have great potential to efficiently mitigate damage to structures subjected to earthquakes as they can provide large added mass effects, while having a relatively small physical mass. The added mass effect of inerters is typically achieved through the conversion of translational mo... | Performance of structures with clutch inerter dampers subjected to seismic excitation | 10.1007/s10518-022-01514-9 |
2023-02-01 | A damping strategy using a friction ring damper for an industrial flywheel was numerically and experimentally investigated. The friction ring damper, located on the arms of the flywheel, was experimentally found to effectively reduce the vibration amplitude of the flywheel. The vibration energy was dissipated when rela... | Numerical and experimental investigations on a friction ring damper for a flywheel | 10.1007/s11071-022-07960-z |
2023-02-01 | Novel combinations of true negative stiffness dampers (NSDs) and inerter devices are used concurrently as supplemental dampers for response control of base-isolated structures. The combination of the inerter and NSD is denoted as negative stiffness inerter damper (NSID). Classical H∞ optimisation based on a well-known ... | Optimum parameters and performance of negative stiffness and inerter based dampers for base-isolated structures | 10.1007/s10518-022-01372-5 |
2023-02-01 | The unwanted vibrations of offshore structures induced by wave or earthquake loads can lead to the reduction of the service life and fatigue failure of the offshore platforms. This paper introduces tuned inerter damper (TID) to a jacket offshore platform as passive control device for mitigating the excessive vibrations... | Mitigating jacket offshore platform vibration under earthquake and ocean waves utilizing tuned inerter damper | 10.1007/s10518-022-01378-z |
2023-02-01 | An electromagnetic inertial mass damper (EIMD) is an inerter-based damper that can significantly enhance the seismic performance of a frame structure. However, the stochastic seismic analysis of a base-isolated structure (BIS) with the EIMD subjected to earthquake ground motions has rarely been reported. Based on a pro... | Stochastic seismic analysis of base-isolated structures with electromagnetic inertial mass dampers considering different soil conditions | 10.1007/s10518-021-01231-9 |
2023-02-01 | In this paper, a hybrid control system (HCS) endowing a base isolation system (BIS) with a Tuned Mass Damper Inerter (TMDI) is proposed for the protection of steel storage tanks from severe structural damages induced by seismic events. Among all the components of industrial plants, cylindrical steel storage tanks are w... | Multi-objective optimal design and seismic assessment of an inerter-based hybrid control system for storage tanks | 10.1007/s10518-022-01457-1 |
2023-01-21 | The present study investigates the performance of steel structures plagued with plan irregularities subjected to underground blast-induced excitations. The building plan irregularity is considered by comparing the structural performance of various geometrical shape buildings, namely square, rectangle, L shape and C sha... | Effect of plan irregularity on the performance of steel buildings subjected to blast-induced vibrations | 10.1007/s41062-023-01034-8 |
2023-01-16 | The dissipation behavior of granular balls in a Q-2D closed container subjected to vertical vibration is investigated by means of Discrete Element Method (DEM). Damping contour and phase diagram of vibrated granular balls in the interested excitation amplitude-frequency plane are obtained respectively, revealing ten di... | Does cavity dimension of vibrated granular container matter? | 10.1007/s10035-022-01299-3 |
2023-01-16 | Classical particle dampers suffer from their non-robust damping behavior, i.e. they can only be efficiently applied to a specific frequency range and amplitude range. The reason for that is that particle motion, also called motion mode, and damper efficiency show a strong correlation. By changing particle or container ... | Design of robust particle dampers using inner structures and coated container walls | 10.1007/s10035-022-01298-4 |
2023-01-16 | During flight, vibrations potentially cause aerodynamic instability and noise. Besides muscle control, the intrinsic damping in bird feathers helps to reduce vibrations. The vanes of the feathers play a key role in flight, and they support feathers’ aerodynamic function through their interlocked barbules. However, the ... | Aerodynamic vs. frictional damping in primary flight feathers of the pigeon Columba livia | 10.1007/s00339-023-06395-6 |
2023-01-13 | In this paper, a three-layer Rao–Nakra sandwich beam is considered where the core viscoelastic layer is constrained by the purely elastic or piezoelectric outer layers. In the model, uniform bending motions of the overall laminate are coupled to the longitudinal motions of the outer layers, and the shear of the middle ... | Long-Time Behavior of a Nonlinearly-Damped Three-Layer Rao–Nakra Sandwich Beam | 10.1007/s00245-022-09931-7 |
2023-01-11 | The goal of this paper is to consider damped elastic systems with nonlocal conditions in the framework of Banach spaces. Our first aim is to investigate the existence of mild solutions to damped elastic systems by means of fixed point for condensing maps avoiding the hypothesis of compactness on the semigroup. The seco... | A Study on Decay Mild Solutions of Damped Elastic Systems with Nonlocal Conditions in Banach Spaces | 10.1007/s00009-023-02260-1 |
2023-01-07 | We study semilinear damped wave equations with power nonlinearity $$|u|^p$$ | u | p and initial data belonging to Sobolev spaces of negative order $$\dot{H}^{-\gamma }$$ H ˙ - γ . In the present paper, we obtain a new critical exponent $$p=p_{\textrm{crit}}(n,\gamma ):=1+\frac{4}{n+2\gamma }$$ p = p crit ( n , γ ) : = ... | On the critical exponent and sharp lifespan estimates for semilinear damped wave equations with data from Sobolev spaces of negative order | 10.1007/s00028-022-00864-w |
2023-01-05 | As one damper controls the response of two adjoining interconnected structures, the interconnecting adjoining structures concept turns into an economic alternative. The functioning of adjoining similar two-degree-of-freedom structures interconnected by a nonlinear damper under random excitation is investigated. The gov... | Nonlinear damper interconnecting adjoining similar structures subjected to random excitation | 10.1007/s41062-022-01026-0 |
2023-01-01 | The quality factor defines the rate with which a nanomechanical resonator dissipates energy. Low energy loss, i.e., a high quality factor, is desirable for most applications of nanomechanical resonators. In this chapter, the three main sources of energy loss in nanomechanical resonators are presented. Energy can be los... | Damping | 10.1007/978-3-031-29628-4_3 |
2023-01-01 | The lack of rapid, simple, and reliable techniques in damage detection of large civil engineering structures has hindered the frequent application of available vibration-based structural health monitoring and damage detection methods. The basics of baseline data of undamaged structure detailed finite element models, or... | Damage Prediction by Using Nonlinearity of Damping | 10.1007/978-981-99-3471-3_4 |
2023-01-01 | The flow of current in the circuit branches and the voltage drop across circuit elements depend on their behavior and ability to store energy. For instance, the voltage drop across a resistor is in phase with its current passing through. However, that is not the same in a capacitor or an inductor. This makes the circui... | Circuit Response Analysis | 10.1007/978-3-031-21908-5_4 |
2023-01-01 | This paper considers a gyroscopic rigid rotor with restoring and damping characteristics of an elastic support. Differential equations of the rotor motion, which take into account the anisotropy of stiffness and damping, are solved analytically by the harmonic balance method. It is found that if the linear stiffness of... | Dynamic Simulation of Gyroscopic Rigid Rotor with Anisotropy of Elastic Support Restoring and Damping Characteristics | 10.1007/978-3-031-29815-8_33 |
2023-01-01 | This study addresses the modeling of different energy dissipation mechanisms for numerical prediction of the vertical acceleration demand in regular moment-resisting steel frame structures. One of the issues discussed is the consideration of viscous damping in the structural model. It is shown that well-established Ray... | Effect of damping model and inelastic deformation on the prediction of vertical seismic acceleration demand on steel frames | 10.1007/s10518-022-01530-9 |
2023-01-01 | This chapter provides an introduction to the optics and plasma physics concepts that will be used throughout the rest of the book. The optics section focuses on basic concepts of light wave propagation and Fourier optics, which will be useful when discussing optical smoothing techniques in Chap. 9 . After a general int... | Fundamentals of Optics and Plasma Physics | 10.1007/978-3-031-23424-8_1 |
2023-01-01 | A linear physical system with multiple sets of input and output can be represented by mathematical functions that relate any outputs to any inputs. These functions are unique and are defined based on the systems governing equations. The transfer function of a system is defined as the Laplace transform of the output res... | Transfer Functions | 10.1007/978-3-031-21908-5_8 |
2023-01-01 | Gilbert damping is one of the critical parameters in magnetic thin films for developing low-power spintronic devices, and $${\mathrm{Co}}_{40}{\mathrm{Fe}}_{40}{\mathrm{B}}_{20}$$ Co 40 Fe 40 B 20 (CFB) is one of the sought-after materials in this regard. Here, we report the effect of annealing on the structural, magne... | Effect of Annealing on Magnetization Reversal and Spin Dynamics in Co_40Fe_40B_20 Thin Films | 10.1007/s10948-022-06442-y |
2023-01-01 | Follower forces acting on elastic beams are considered, and their nonconservative character is discussed. The linearized bifurcation analysis of a double pendulum, known as Ziegler column , is performed. In absence of damping, the mechanism of flutter Flutter circulatory system (or circulatory, or reversible, Hopf bifu... | Dynamic Bifurcations Induced by Follower Forces | 10.1007/978-3-031-27572-2_11 |
2023-01-01 | This chapter describes seventeen fundamental experiments in vibration which can easily be conducted in the laboratory to understand the basic vibration theory which has been described in Chapter 2. The presentation is such that an academician can mix and match these experiments to suit the laboratory courses being taug... | Vibration Experiments | 10.1007/978-3-031-03968-3_10 |
2023-01-01 | We consider a fluid-plate interaction model where the two dimensional plate is subject to viscoelastic (strong) damping, as it occurs in some biological systems (Ozkaya et al., Fundamentals of biomechanics-equilibrium, motion, and deformation. Springer, New York, 2021). The strength of the Kelvin-Voigt damping is measu... | Fluid–Plate Interaction with Kelvin-Voigt Damping and Bending Moment at the Interface: Well-posedness, Spectral Analysis, Uniform Stability | 10.1007/978-3-031-21460-8_6 |
2023-01-01 | This chapter starts with the description of a charged particle motion in a plane light wave, including the figure of eight motion at higher intensities. The single particle dynamics in electron or ion plasma waves is discussed next; particle trapping, which plays an important role in the generation of suprathermal elec... | Single Particle Dynamics in Light Waves and Plasma Waves | 10.1007/978-3-031-23424-8_2 |
2023-01-01 | In this chapter, analysis and characterization of responses of mechatronics and measurement systems under static and dynamic conditions are presented. Details of first-order and second-order system characteristics and their experimental determination are covered. Examples including computer-aided analysis and simulatio... | Dynamic System Characteristics | 10.1007/978-3-031-29320-7_4 |
2023-01-01 | Cables stay bridges, due to the slenderness, have generally a very low inherent damping. Wind induced, vortex excitation, wake galloping, or rain-wind combination may cause excessive vibrations conduit to the risk of decrease the fatigue service life of the cables system. External damper systems in combination with a s... | Friction Damper Performance on Stay Cable Bridges in Vietnam, Solution Prediction, and In-Situ Testing | 10.1007/978-981-19-4835-0_12 |
2023-01-01 | The objective of this chapter is to show that nonsmooth processes may naturally occur as high-energy asymptotics in different oscillatory models with no intentionally introduced stiff constraints or external impacts. In other words, nonsmooth temporal mode shapes may be as natural as sine waves generated by same oscill... | Nonsmooth Processes as Asymptotic Limits | 10.1007/978-3-031-37788-4_3 |
2023-01-01 | This chapter discusses the absorption of light waves (and to a lesser extent, plasma waves) in plasmas. The collisional absorption coefficient of light waves (or plasma waves) is derived from first principles using a ballistic model and compared to the derivation from a fluid model. The associated plasma heating rate i... | Absorption of Light Waves (and EPWs) in Plasmas | 10.1007/978-3-031-23424-8_4 |
2023-01-01 | Epoxidised natural rubber (ENR) is foreseen as a good material of choice for a comprehensive range of technical rubber goods due to its unique properties. Properties of ENR such as oil resistance and low gas permeability are suitable for products that require resistance to oil and low permeation rates, such as seals an... | Epoxidised Natural Rubber in Technical Rubber Goods | 10.1007/978-981-19-8836-3_6 |
2023-01-01 | With the development of wind power and large-scale grid connection, more and more new challenges are brought to the safe operation of power system. It is of great significance to analyze the damping characteristics and stability of low-frequency oscillation of wind power grid connected system, so as to improve the perm... | Research on the Influence of Wind Power Grid Connected to Power System Damping Characteristics | 10.1007/978-981-99-0408-2_1 |
2023-01-01 | A new proportional damping model, named as bell-shaped, has recently been proposed to address the limitations of existing models for simulating un-modeled energy dissipation in large-scale structures subjected to seismic loading. This model relies on an expanded damping coefficient matrix in a sparse matrix form in ord... | Implementation and Performance of Bell-Shaped Damping Model | 10.1007/978-3-031-30125-4_13 |
2023-01-01 | Squeezed film damping (SFD) becomes a dominant damping mechanism in micro-electro-mechanical system (MEMS). Depending on the pressure variation in MEMS, SFD governs the dynamic parameters like quality factors (Q factors) and damping ratio. In the present paper, we calculate the Q factor and damping ratio of the trapezo... | Finite Element Analysis of Squeezed Film Damping on Trapezoidal Microcantilever Resonators at Different Pressure Levels | 10.1007/978-3-031-20353-4_17 |
2023-01-01 | The primary purpose of this article is to explore different types of wave solutions such as shock, solitary, and periodic solutions for the ion acoustic waves (IAWs) propagating in a collisional dusty plasma containing dust grain with a negative charge, positive ions, neutral particles, and electrons abiding q-nonexten... | Shock, Solitary, and Periodic Wave Solutions of the Ion Acoustic Waves for Nonextensive Dusty Plasma in the Framework of Korteweg-de Vries-Burgers Equation with Forcing and Damping Terms | 10.1007/978-981-19-8054-1_10 |
2023-01-01 | This paper focuses on the representative renewable energy bases in eastern Xinjiang and southern Qinghai regions, and conducts in-depth studies on the current status and problems of power grids in these regions. On the basis of the power grid characteristics, this paper proposes a DC grid based on the voltage source co... | Design and Simulation Modeling of ±800 kV HVDC Project for Improving Power Transfer Capability of Renewable Energy in Xinjiang-Qinghai Region | 10.1007/978-981-99-0063-3_44 |
2023-01-01 | Numerical Integration Algorithm plays a very important role in real-time hybrid experiments. Based on the Newmark (γ = 1/2, β = 1/4) average constant acceleration algorithm, the stability analysis equations of Chang Algorithm, CR Algorithm and TL Algorithm under the condition of negative stiffness were derived by using... | Comparison of Stability of Four Numerical Integration Methods Under Negative Stiffness | 10.1007/978-981-19-5217-3_101 |
2023-01-01 | The mechanics of nanomechanical resonators can be described by a lumped-element model. In this chapter, linear, coupled, and nonlinear damped and driven resonators are discussed by means of lumped-element models. Additionally, the phenomenon of parametric amplification is introduced. Such simplified models with a singl... | Lumped-Element Model Resonators | 10.1007/978-3-031-29628-4_1 |
2023-01-01 | The accuracy of the machined workpiece depends on the true conditions of the hydrodynamic linear guides. Linear guides based on hydrodynamic lubrication are still in use due to their high damping coefficient and high load carrying capacity. Measuring the true conditions of the hydrodynamic linear guide is important to ... | Development of Pressure Sensors Integration Method to Measure Oil Film Pressure for Hydrodynamic Linear Guides | 10.1007/978-3-031-18318-8_29 |
2023-01-01 | The possibility of increasing lifting mechanisms’ productivity through damping elastic mechanical vibrations that negatively affect the control quality, increase the dynamic winch loads, contribute to the accumulation of fatigue stresses in kinematic circuits, lead to the equipment premature failures and unplanned down... | Vibration Damping of Lifting Mechanisms for Elevators Using Control Systems | 10.1007/978-3-031-32774-2_2 |
2023-01-01 | Turbulent fluctuation of the liquid medium under lateral excitation is a major area of concern due to the potential severities it may cause if the contained structure is damaged. Therefore, this study focuses on variation in the self-damping efficiency of the liquid mass in a liquid tank under lateral excitation. For t... | Influence of Geometric Parameters in Self-damping Efficiency of Rectangular Liquid Storage Tanks | 10.1007/978-981-19-3371-4_12 |
2023-01-01 | This paper presents an investigation of complex mode shape analysis caused by non-linear damping. Nowadays, most academics are accustomed to complex mode shapes, which are a characteristic of most axisymmetric structures. The topic was deeply investigated during the 1980s, sparking the sharpest debates about their phys... | An Investigation of Complex Mode Shapes | 10.1007/978-3-031-04086-3_2 |
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