publicationDate stringlengths 10 10 | abstract stringlengths 0 37.3k | title stringlengths 1 5.74k | doi stringlengths 11 47 ⌀ |
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2017-08-01 | In the present study, the nature of dielectric layer above metal layer in surface plasmon resonance sensor is investigated. The performance-defining parameters, i.e., shift in resonance angle, half width at half maximum, and minimum reflection intensity, are investigated according to the variation of refractive index (... | Influence of Dielectric Coating on Performance of Surface Plasmon Resonance Sensor | 10.1007/s11468-016-0366-3 |
2017-08-01 | In this work, we investigate the dynamics of quantum correlation measured by measurement-induced nonlocality (MIN) and local quantum uncertainty (LQU) in correlated amplitude damping (CAD) channel. We find that the memory parameter brings different influences on MIN and LQU. In addition, we propose a scheme to protect ... | Protecting Quantum Correlation from Correlated Amplitude Damping Channel | 10.1007/s13538-017-0509-9 |
2017-08-01 | High dimensional quantum system plays a vital role in quantum information processing. However, decoherence induced by the coupling between quantum system and environment often destroys quantum resource. In this paper, we study the dynamics and protection of qutrit quantum coherence (QC) under amplitude damping (AD) dec... | Protecting Qutrit Quantum Coherence | 10.1007/s10773-017-3407-6 |
2017-08-01 | This paper investigates the low-velocity impact response of a shear deformable laminated beam which contains both carbon nanotube reinforced composite (CNTRC) layers and carbon fiber reinforced composite (CFRC) layers. The effect of matrix cracks is considered, and a refined self-consistent model is selected to describ... | Nonlinear low-velocity impact on damped and matrix-cracked hybrid laminated beams containing carbon nanotube reinforced composite layers | 10.1007/s11071-017-3557-3 |
2017-08-01 | The major function of smoke control system is to prevent smoke from penetrating to vertical shaft or stairwell by pressurizing vestibule where is generally located between the vertical shaft and living room. Thus, it is important to calculate the required flow rate of air supply for remaining the pressure difference of... | The effect of damper leakage and fire size on the performance of smoke control system in high-rise building | 10.1007/s12206-017-0750-8 |
2017-08-01 | The external squeeze film damping (SFD) of microelectromechanical systems (MEMS) resonators is a dominant factor to lower the quality factor (Q-factor) due to their large surface area to volume ratio and small spacing. To improve the Q-factor of MEMS resonators, the effect of gas rarefaction (low gas ambient pressure i... | Effect of gas rarefaction on the quality factors of micro-beam resonators | 10.1007/s00542-016-3068-z |
2017-08-01 | 目 的 针对典型高铁轨道结构, 对钢轨减振器的设计参数进行研究, 进一步揭示钢轨减振器的工作机理, 为合理设计和应用提供科学依据。 创新点 运用基于傅里叶变换的无限长周期结构动态特性的分析方法, 从轨道结构的频散特性、共振特性、振动衰减特性和振动能量(近似声辐射能力)等多个方面对钢轨减振器的参数进行研究; 提出荷载移动对振动衰减率的影响问题。 方 法 运用基于傅里叶变换的无限长周期结构动态特性的分析方法, 结合典型高铁轨道结构, 对钢轨减振器的设计参数对轨道结构动力学特性的影响进行研究。研究的动力学特性包括: 频散特性、共振特性、振动衰减特性和振动能量(近似声辐射能力)。 结 论 1. 加装钢轨减振器会引入新的阻带, 从而增加整个阻... | Theoretical investigation into the effect of rail vibration dampers on the dynamical behaviour of a high-speed railway track | 10.1631/jzus.A1600697 |
2017-08-01 | A magneto rheological (MR) fluid damper offers cost effective solution for semiactive vibration control in an automobile suspension. The performance of MR damper is significantly depends on the electromagnetic circuit incorporated into it. The force developed by MR fluid damper is highly influenced by the magnetic flux... | Optimization of Magneto-Rheological Damper for Maximizing Magnetic Flux Density in the Fluid Flow Gap Through FEA and GA Approaches | 10.1007/s40032-016-0251-z |
2017-08-01 | The dynamics of jacket supported offshore wind turbine (OWT) in earthquake environment is one of the progressing focuses in the renewable energy field. Soil–structure interaction (SSI) is a fundamental principle to analyze stability and safety of the structure. This study focuses on the performance of the multiple tune... | Multiple tuned mass damper based vibration mitigation of offshore wind turbine considering soil–structure interaction | 10.1007/s13344-017-0054-x |
2017-07-29 | In this paper, we consider a hydroelastic model to examine the radiation of waves by a submerged sphere for both heave and sway motions in a single-layer fluid flowing over an infinitely extended elastic bottom surface in an ocean of finite depth. The elastic bottom is modeled as a thin elastic plate and is based on th... | Effects of elastic bed on hydrodynamic forces for a submerged sphere in an ocean of finite depth | 10.1007/s00033-017-0837-1 |
2017-07-01 | The viscous damping coefficient (VDC) of hydraulic actuators is crucial for system modeling, control and dynamic characteristic analysis. Currently, the researches on hydraulic actuators focus on behavior assessment, promotion of control performance and efficiency. However, the estimation of the VDC is difficult due to... | Theoretical Investigation of the Viscous Damping Coefficient of Hydraulic Actuators | 10.1007/s10033-017-0153-x |
2017-07-01 | The consequences of emergencies of turbosets for different application are revealed, the cause of forced shutdown and even catastrophic destructions of which many researchers consider the rotor-to-stator rubbing and development—to a greater or lesser extent—of the phenomena of the rotor generation roll over the stator.... | Forces exciting generation roll at rotor vibrations when rotor-to-stator rubbing | 10.1134/S0040601517070072 |
2017-07-01 | Active damped LCL-filter-based inverters have been widely used for grid-connected distributed generation (DG) systems. In weak grids, however, the phase-locked loop (PLL) dynamics may detrimentally affect the stability of grid-connected inverters due to interaction between the PLL and the controller. In order to solve ... | Impact of phase-locked loop on stability of active damped LCL-filter-based grid-connected inverters with capacitor voltage feedback | 10.1007/s40565-017-0302-3 |
2017-07-01 | In this paper, linear and nonlinear vibration absorbers are designed to suppress regenerative chatter in micro-milling process. Suppressing regenerative chatter leads to improve surface finish. Micro-milling process is considered as a two degree of freedom system, and the run-out effects of cutting tool are also taken ... | Application of linear and nonlinear vibration absorbers in micro-milling process in order to suppress regenerative chatter | 10.1007/s11071-017-3488-z |
2017-07-01 | The air spring component with a damper inside is widely used in the commercial vehicle as a vibration isolator. The nonlinear dynamics of the air spring component is important for full vehicle ride comfort evaluation. This paper aims to develop a mechanical model of the air spring component which can reproduce the air ... | Nonlinear dynamic model of air spring with a damper for vehicle ride comfort | 10.1007/s11071-017-3535-9 |
2017-07-01 | Cable stayed Bridges are highly vulnerable to strong wind load induced vibrations which are responsible of generating aerodynamic instability and in a critical situation lead to structural failure. This paper focuses on buffeting response and flutter instability in a cable stayed Bridge. A strong fluctuating wind is as... | Aerodynamic stability parameters optimization and global sensitivity analysis for a cable stayed Bridge | 10.1007/s12205-016-0962-y |
2017-07-01 | A bistable nonlinear energy sink conceived to mitigate the vibrations of host structural systems is considered in this paper. The hosting structure consists of two coupled symmetric linear oscillators (LOs), and the nonlinear energy sink (NES) is connected to one of them. The peculiar nonlinear dynamics of the resultin... | The tuned bistable nonlinear energy sink | 10.1007/s11071-017-3444-y |
2017-07-01 | This study investigates the efficiency of two types of rehabilitation methods based on economic justification that can lead to logical decision making between the retrofitting schemes. Among various rehabilitation methods, concentric chevron bracing (CCB) and cylindrical friction damper (CFD) were selected. The perform... | Effectiveness of two conventional methods for seismic retrofit of steel and RC moment resisting frames based on damage control criteria | 10.1007/s11803-017-0404-y |
2017-06-29 | Beam lifetime of a synchrotron is dominated by Touschek scattering. In the beamline Phase II project of Shanghai synchrotron radiation facility, a passive third harmonic cavity is to be installed for bunch lengthening and instability suppressing. In this paper, the beam dynamics of the cavity is investigated. The param... | Improving Touschek lifetime and synchrotron frequency spread by passive harmonic cavity in the storage ring of SSRF | 10.1007/s41365-017-0259-y |
2017-06-09 | Ni–Mn–Ga–Cu microwires, with diameter of 20–80 μm, length of 30–150 mm and fined columnar grains, were produced by melt-extraction technique. The damping capacity of the extracted microwires was investigated by stretching a microwire under a tensile stress using dynamic mechanical analyzer. The damping capacity of the ... | High damping capacity of Ni–Mn–Ga–Cu microwires prepared by melt-extraction technique | 10.1007/s12598-017-0925-6 |
2017-06-01 | Under the condition of actual sea state, hydrodynamic characteristics of floating horizontal-axis turbine are related to wave characteristics and floating carrier motion responses. We recently published the hydrodynamic performance and axial damping coefficient of the horizontal-axis tidal current turbine influenced by... | The effects of roll motion of the floating platform on hydrodynamics performance of horizontal-axis tidal current turbine | 10.1007/s00773-016-0408-8 |
2017-06-01 | This paper deals with the speed response characteristic of the concentrated flux synchronous motor (CFSM) using ferrite magnets for the electric power steering (EPS) system. To analyze the response characteristic of the CFSM, an analytical method using the electromechanical undamped natural frequency and damping ratio ... | Design of ferrite magnet CFSM to improve speed response of EPS system | 10.1007/s12239-017-0049-x |
2017-06-01 | We present an ab initio theory of the Gilbert damping in ferromagnetic alloys with substitutional disorder. The theory is based on nonlocal torques that are represented by nonrandom, site-off-diagonal, and spin-independent matrices, which simplifies the configuration averaging. The formalism is developed for the relati... | Ab Initio Theory of the Gilbert Damping in Random Ferromagnetic Alloys | 10.1007/s10948-016-3662-4 |
2017-06-01 | In this paper, the response behaviors of two parallel structures coupled by Lead Extrusion Dampers (LED) under various earthquake ground motion excitations are investigated. The equation of motion for the two parallel, multi-degree-of-freedom (MDOF) structures connected by LEDs is formulated. To explore the viability o... | Seismic analysis of parallel structures coupled by lead extrusion dampers | 10.1007/s40091-017-0157-x |
2017-06-01 | This paper describes a test stand along with a model of a lance used in glass works. A prototype friction damper was used for vibration damping of the lance. Experimental tests were conducted, whose aim was to determine operating conditions under which the damper will be the most effective. Damping was evaluated based ... | Testing the vibration damping of a glass gatherer robot arm using a friction damper | 10.1016/j.acme.2016.10.004 |
2017-06-01 | Thin film bulk acoustic resonator (FBAR) higher quality factor ( Q ) provides steep skirt and low insertion losses in the pass band. In this paper, three different loss sources are identified and FBAR is design and simulated in order to reduce the losses. Firstly, the FBAR’s top electrode is simulated for the areas of ... | Design and Simulation of FBAR for Quality Factor Enhancement | 10.1007/s12647-016-0195-z |
2017-06-01 | This paper is concerned with the analysis of active constrained layer damping (ACLD) of geometrically nonlinear vibrations of sandwich plates with facings composed of fuzzy fiber reinforced composite (FFRC). FFRC is a novel composite where the short carbon nanotubes (CNTs) which are either straight or wavy are radially... | Active damping of geometrically nonlinear vibrations of sandwich plates with fuzzy fiber reinforced composite facings | 10.1007/s40435-015-0180-3 |
2017-06-01 | There is an inherent trade-off between stability and transparency in haptic interaction systems when interacting with virtual environments. Therefore, no perfect transparency can be displayed with absolute stability. For meaningful interactions, anyhow, some level of transparency is necessary for providing realistic fe... | An enhanced force bounding approach for stable haptic interaction by including friction | 10.1007/s12541-017-0097-1 |
2017-06-01 | Structural dynamic characteristics are the most significant parameters that play a decisive role in structural damage assessment. The more sensitive parameter to the damage is the damping behavior of the structure. The complexity of structural damping mechanisms has made this parameter to be one of the ongoing research... | Approximation of structural damping and input excitation force | 10.1007/s11709-016-0371-9 |
2017-06-01 | In this paper, a novel structural modification approach has been adopted to eliminate the early coupling between the bending and torsional mode shapes of vibrations for a cable stayed bridge model generated using ABAQUS software. Two lateral steel beams are added to the middle span of the structure. Frequency analysis ... | A novel structural modification to eliminate the early coupling between bending and torsional mode shapes in a cable stayed bridge | 10.1007/s11709-016-0376-4 |
2017-06-01 | Attention focuses on how plastic deformation and asymmetric loading affect the properties of Fe‒Al and Mn–Cu damping alloys. When the vibrational amplitude is small, the damping properties of Fe‒Al alloys are highly sensitive to external static loads; the sensitivity is much less for Mn–Cu alloys. With decrease in the ... | Influence of plastic deformation and asymmetric loading on the properties of Fe–Al and Mn–Cu damping alloys | 10.3103/S0967091217060031 |
2017-06-01 | A design sensitivity analysis for the transient response of the non-viscously damped dynamic systems is presented. The non-viscously (viscoelastically) damped system is widely used in structural vibration control. The damping forces in the system depend on the past history of motion via convolution integrals. The non-v... | Design sensitivity analysis for transient response of non-viscously damped dynamic systems | 10.1007/s00158-016-1636-6 |
2017-06-01 | Time-dependent problems modeled by hyperbolic partial differential equations can be reformulated in terms of boundary integral equations and solved via the boundary element method. In this context, the analysis of damping phenomena that occur in many physics and engineering problems is a novelty. Starting from a recent... | Energetic BEM-FEM coupling for the numerical solution of the damped wave equation | 10.1007/s10444-016-9500-1 |
2017-06-01 | The importance of robust feedback control for uncertain negative imaginary system lies in its practical relevance and engineering applications, for example, lightly damped flexible structures with collocated position sensors and force actuators. This article investigates an LMI based robust static state internally stab... | LMI based robust state feedback control of negative-imaginary systems | 10.1007/s40435-015-0188-8 |
2017-06-01 | In modern technology, the protection of mechanical objects from vibrational effects is an important problem. The task of increasing the efficiency of a vibration–isolation system as applied to vehicles is discussed. Operator equations that describe the movement of a single-mass system for active vibration isolation wit... | Investigations of the dynamic characteristics of an active vibration–isolation system of an object with varying parameters | 10.3103/S1068371217060025 |
2017-06-01 | Magnetorheological dampers (MR) are one of the semi active devices, which has the capability of providing variable damping force for the variable input current. Induced force is directly dependent on the amount of magnetic flux density developed in effective fluid flow gap of the MR damper. In the present work, influen... | Optimisation of monotube magnetorheological damper under shear mode | 10.1007/s40430-017-0709-9 |
2017-06-01 | A three-storey half scale reinforced concrete (RC) building is fixed with X-shaped metallic damper at the ground floor level, is designed and fabricated to study its seismic response characteristics. Experimental studies are carried out using the (4 m × 4 m) tri-axial shake-table facility to evaluate the seismic respon... | Earthquake Response of Reinforced Concrete Building Retrofitted with Geopolymer Concrete and X-shaped Metallic Damper | 10.1007/s40030-017-0209-z |
2017-05-12 | We consider a nonlinear Schrödinger equation with Dirac interaction defect. Moreover, non-standard boundary conditions are introduced in connection to the behavior of the solutions. First, we prove that this kind of Schrödinger equation can be characterized by an autonomous dynamical system. Then, based on this result,... | Existence of global attractor for one-dimensional weakly damped nonlinear Schrödinger equation with Dirac interaction and artificial boundary condition in half-line | 10.1186/s13662-017-1194-2 |
2017-05-05 | In this paper we consider a quasilinear viscoelastic wave equation with initial-boundary conditions, strong damping and source term. Under suitable assumptions on the initial data and the relaxation function, we establish a blow-up result of a solution for negative initial energy and some positive initial energy if the... | Blow-up and global existence for solution of quasilinear viscoelastic wave equation with strong damping and source term | 10.1186/s13661-017-0796-7 |
2017-05-01 | In this paper, we study the well-posedness and exponential decay for the porous thermoelastic system with the heat conduction given by Cattaneo’s law and a time-varying delay term, the coefficient of which is not necessarily positive. Using the semigroup arguments and variable norm technique of Kato, we first prove tha... | Well-posedness and exponential decay for a porous thermoelastic system with second sound and a time-varying delay term in the internal feedback | 10.1007/s00161-017-0556-z |
2017-05-01 | We investigate the Cauchy problem for the Vlasov–Poisson system with radiation damping. By virtue of energy estimate and a refined velocity average lemma, we establish the global existence of nonnegative weak solution and asymptotic behavior under the condition that initial data have finite mass and energy. Furthermore... | Existence, uniqueness and asymptotic behavior for the Vlasov–Poisson system with radiation damping | 10.1007/s10114-016-6310-9 |
2017-05-01 | In this paper, a study of the thermoelastic damping of a gold microbeam resonator in the context of the generalized thermoelasticity with one relaxation time has been improved. An explicit formula of thermoelastic damping has been derived in general form includes the speed of the beam in the direction of its principal ... | Effect of the speed, the rotation and the magnetic field on the Q-factor of an axially clamped gold micro-beam | 10.1007/s11012-016-0498-8 |
2017-05-01 | We propose a comprehensive numerical procedure to calculate the hydrodynamic coefficients of a moving body with NACA0012 hydrofoil by means of Computational fluid dynamics (CFD). To accomplish maneuverability study and dynamic analysis of an Autonomous underwater vehicle (AUV), these hydrodynamic coefficients were obta... | Numerical investigation of oscillation frequency and amplitude effects on the hydrodynamic coefficients of a body with NACA0012 hydrofoil section | 10.1007/s12206-017-0422-8 |
2017-05-01 | The spin-orbit driven phenomena, such as the anisotropic magnetoresistance (AMR), the anomalous Hall conductivity (AHC), and the Gilbert damping in disordered fcc-PdCo alloys were studied from first principles using a unified electronic structure model. In PdCo alloys around equiconcentration composition partial order ... | Galvanomagnetic Transport Properties and Gilbert Damping in Ferromagnetic PdCo Alloys | 10.1007/s10948-016-3661-5 |
2017-05-01 | The damped harmonic oscillator is modeled as a local mode X with mass m and frequency $$\omega _{0}$$ ω 0 immersed in a phonon bath with spectral density function $$j_{0}(\omega $$ j 0 ( ω ). This function behaves as $$\omega ^{s}\, (s= 1,2,3,\ldots )$$ ω s ( s = 1 , 2 , 3 , … ) when $$\omega \rightarrow 0$$ ω → 0 . Th... | The mass renormalization for the translational Brownian motion | 10.1007/s10910-017-0741-0 |
2017-05-01 | It is shown that explosive welding may be used to create bimetal material exhibiting simultaneously high strength and good damping capacity. Bimetal strength is provided due to a layer of high-strength high-quality steel 30KhGSA, and damping capacity is provided as a result of using a layer of damping steel 60G40D. A h... |
Preparation of Bimetal with Good Damping Properties
| 10.1007/s11015-017-0455-3 |
2017-05-01 | We study the theory of bending of a layered stack. The theoretical model takes into account shear and normal strains and stresses. We perform the detailed analysis of the distribution of stresses in a three-layer beam for different frequencies of vibrations. We also estimate the shock-absorbing properties of the beam w... | Determination of Energy Dissipation in Layered Beams Under Vibratory Loads | 10.1007/s11003-017-0022-x |
2017-05-01 | Hydrogen bonding is considered to have significant effect on the interaction between polymeric chains and on the viscoelasticity of the polymeric materials. In this paper, we attempt to discuss the relationship between hydrogen bonding density and damping behavior and mechanical properties of polyethylene-based polymer... | High damping and mechanical properties of hydrogen-bonded polyethylene materials with variable contents of hydroxyls: Effect of hydrogen bonding density | 10.1007/s10118-017-1918-5 |
2017-05-01 | Among the retrofitting techniques available, steel braces can be considered as one of the most efficient solution for seismic performance upgrading of RC frame structures. Added Damping and Stiffness (ADAS) elements are designed to dissipate energy thought the flexural yielding deformation of mild-steel plates. The cur... | Evaluating response modification factor (R) of reinforced concrete frames with chevron brace equipped with steel slit damper | 10.1007/s12205-016-1055-7 |
2017-05-01 | AZ31 alloy sheet fabricated by rolling was processed by friction stir processing (FSP) with different passes. The effect of FSP on the microstructure and damping capacity of AZ31 alloy sheet was discussed. The fine and equiaxed grains were obtained in the stirred zone (SZ) for FSPed samples from 1 pass to 3 passes with... | Effect of friction stir processing on microstructure and damping capacity of AZ31 alloy | 10.1007/s11771-017-3506-9 |
2017-05-01 | The material removal rate and required workpiece surface quality of thin-walled structure milling are greatly limited due to its severe vibration, which is directly associated with the dynamic characteristics of the system. Therefore, the suppression of vibration is an unavoidable problem during milling. A novel partia... | Partial Surface Damper to Suppress Vibration for Thin Walled Plate Milling | 10.1007/s10033-017-0107-3 |
2017-05-01 | A phenomenological approach which we refer to as kinematic is proposed to describe hysteresis; according to this approach, the force and kinematic parameters of a mechanical system are related by a first-order ordinary differential equation. The right-hand side is chosen in the class of functions ensuring the asymptoti... | Vibrations of mechanical systems with energy dissipation hysteresis | 10.3103/S0025654417030037 |
2017-04-01 | This paper presents the implementation of fractional order PID (FO-PID) controller using hardwired modules of constant phase element (CPE). A new approach of phase shaping by slope cancellation of asymptotic phase plots for zeros and poles within the given bandwidth is realized. Analog circuits, which exhibit analog fr... | Design of new practical phase shaping circuit using optimal pole–zero interlacing algorithm for fractional order PID controller | 10.1007/s10470-016-0920-0 |
2017-04-01 | This paper describes an efficient method to predict the nonlinear steady-state response of a complex structure with multi-scattered friction contacts. The contact friction force is equivalent to additional stiffness and damping based on optimal approximation theory, and as a consequence, the computation is simplified g... | An effective numerical method for calculating nonlinear dynamics of structures with dry friction: application to predict the vibration response of blades with underplatform dampers | 10.1007/s11071-016-3239-6 |
2017-04-01 | In this paper, we analyze the dynamics of tuned mass dampers with inerters. In the beginning, we describe the influence of inertance value with respect to the overall mass of the damping device. For further analysis, we pick three practically significant cases—each corresponding to different composition of tuned mass d... | Effects of play and inerter nonlinearities on the performance of tuned mass damper | 10.1007/s11071-016-3292-1 |
2017-04-01 | We investigate the shape of the solution of the Cauchy problem for the damped wave equation. In particular, we study the existence, location and number of spatial maximizers of the solution. Studying the shape of the solution of the damped wave equation, we prepare a decomposed form of the solution into the heat part a... | Movement of time-delayed hot spots in Euclidean space | 10.1007/s00209-016-1735-5 |
2017-04-01 | Machining is one of the important manufacturing processes used in industry. Dynamic interaction between the tool and the workpiece may lead to the occurrence of chatter vibrations, which are associated with problems of poor surface finish, reduced workpiece quality, and low productivity. In the past, researchers develo... | Dynamic damping of machining vibration: a review | 10.1007/s00170-016-9862-z |
2017-04-01 | This paper investigates the stabilizing effect of process damping at low cutting speeds for regenerative machine tool vibrations of milling processes. The process damping is induced by a velocity-dependent cutting force model, which takes into account that the actual cutting velocity is different from the nominal one d... | Extension of process damping to milling with low radial immersion | 10.1007/s00170-016-9780-0 |
2017-04-01 | In this paper, we consider a viscoelastic flexible structure modeled as an Euler-Bernoulli beam. The beam is moving in the direction of its axis. This is one of the main features of this work. We will be dealing with variable intervals of integration and therefore the standard computation using differentiation under th... | Stability of an Axially Moving Viscoelastic Beam | 10.1007/s10883-016-9317-8 |
2017-04-01 | Machining chatter often becomes a big hindrance to high productivity and surface quality in actual milling process, especially for the thin-walled workpiece made of titanium alloy due to poor structural stiffness. Aiming at this issue, the stability lobes are usually employed to predict if chatter may occur in advance.... | Chatter prediction utilizing stability lobes with process damping in finish milling of titanium alloy thin-walled workpiece | 10.1007/s00170-016-9834-3 |
2017-04-01 | The Metal-Matrix Composites (MMCs) containing hollow spherical reinforcements are under active development for the applications such as space structures, submarine hulls etc. where weight is of critical importance. When these materials are subjected to a time varying strain field, energy is dissipated because of the th... | Dynamic Effects in Elastothermodynamic Damping of Hollow Particle Reinforced Metal-Matrix Composites | 10.1007/s40032-016-0253-x |
2017-04-01 | In this article, we study the weak dissipative Kirchhoff equation $${u_{tt}} - M\left( {\left\| {\nabla u} \right\|_2^2} \right)\Delta u + b\left( x \right){u_t} + f\left( u \right) = 0$$ u t t − M ( ‖ ∇ u ‖ 2 2 ) Δ u + b ( x ) u t + f ( u ) = 0 , under nonlinear damping on the boundary $$\frac{{\partial u}}{{\partial ... | General energy decay of solutions for a weakly dissipative Kirchhoff equation with nonlinear boundary damping | 10.1007/s10255-017-0669-y |
2017-04-01 | The paper studies different types of dampers for rotor supports of gas turbine engines (GTE). The advantages of hydrodynamic dampers are shown. Hydrodynamic dampers for GTE rotor supports are studied. A new design and technique of calculation are proposed for an adjustable hydrodynamic damper. | Trends in research of hydrodynamic damping in rotor supports of gas turbine engines | 10.3103/S1068799817020118 |
2017-04-01 | This paper presents a new damping boring bar with a variable stiffness dynamic vibration absorber (VSDVA) based on dynamic vibration absorber theory. The new designed VSDVA is installed in a cavity which is in the front of the damping boring bar. A new vibration reduction method is proposed by adjusting the stiffness o... | Research on the performance of damping boring bar with a variable stiffness dynamic vibration absorber | 10.1007/s00170-016-9612-2 |
2017-04-01 | Attention focuses on reducing the vibration of energy-intensive electrical systems, such as the power units of autonomous vehicles. The amplitude–frequency spectra of input and output vibrational signals for hydraulic vibrational bearings and cable vibrational dampers are investigated. Cable vibrational dampers are mor... | Damping of vibrations at resonant frequencies of electrical systems | 10.3103/S1068798X17040049 |
2017-04-01 | Chatter usually occurs in cutting of thin-walled workpiece due to poor structural stiffness, which results in poor surface quality and damaged tool. Aiming at process damping caused by interference between a tool flank face and a machined surface of thin-walled part, the dynamic model and critical condition of stabilit... | Investigation on chatter stability of thin-walled parts in milling based on process damping with relative transfer functions | 10.1007/s00170-016-9431-5 |
2017-04-01 | A novel nonlinear structure with adjustable stiffness, damping and inertia is proposed and studied for vibration energy harvesting. The system consists of an adjustable-inertia system and X-shaped supporting structures. The novelty of the adjustable-inertia design is to enhance the mode coupling property between two or... | Nonlinear vibration energy harvesting with adjustable stiffness, damping and inertia | 10.1007/s11071-016-3231-1 |
2017-04-01 | In this paper, we propose a method based on collocation of exponential B-splines to obtain numerical solution of a nonlinear second-order one-dimensional hyperbolic equation subject to appropriate initial and Dirichlet boundary conditions. The method is a combination of B-spline collocation method in space and two-stag... | Numerical solution of second-order one-dimensional hyperbolic equation by exponential B-spline collocation method | 10.1134/S1995423917020070 |
2017-03-22 | In this paper we study the initial value problem for the nonlinear wave equation with damping and source terms u t t − ρ ( x ) − 1 Δ u + u t + m 2 u = f ( u ) $$ u_{tt}-\rho(x)^{-1}\varDelta u+u_{t}+m^{2}u=f(u) $$ with some ρ ( x ) $\rho(x)$ and f ( u ) $f(u)$ on the whole space R n $\mathbb{R}^{n}$ ( n ≥ 3 $n\geq 3$ )... | Global non-existence for some nonlinear wave equations with damping and source terms in an inhomogeneous medium | 10.1186/s13661-017-0762-4 |
2017-03-22 | In the present work we study the influence of both the fluctuation effects of the atom velocity and the atomic decay on the fidelity corresponding to a protocol for the quantum state transfer between two modes of a bimodal cavity QED. In our model the atom interacts separately with each mode, which is made possible by ... | Comparing the effects of atomic damping and velocity fluctuations upon transfer of quantum state in a bimodal cavity QED | 10.1007/s11082-017-0989-4 |
2017-03-01 | Vibration in heat exchangers is one of the main problems that the industry has faced over last few decades. Vibration phenomenon in heat exchangers is of major concern for designers and process engineers since it can lead to the tube damage, tube leakage, baffle damage, tube collision damage, fatigue, creep etc. In the... | Experimental study on cross-flow induced vibrations in heat exchanger tube bundle | 10.1007/s13344-017-0011-8 |
2017-03-01 | This paper presents the propagation of thermoelastic waves along circumferential direction in homogeneous, transradially isotropic spherical curved plates. Mathematical modeling of the problem to obtain dispersion curves for transversely isotropic thermally conducting spherically curved elastic plates leads to coupled ... | Circumferential Waves in Transradially Isotropic Thermoelastic Spherical Curved Plates | 10.1007/s40010-016-0283-z |
2017-03-01 | A procedure for deriving the complete equations of motion to compute an isolator’s displacement due to strong ground motion is applied to structures isolated with friction pendulum systems. The resulting equations, which contain the vertical inertia forces, were studied to estimate the influence of these forces on the ... | The influence of the vertical inertia forces on the behavior of friction pendulum bearings (FPB) | 10.1007/s00419-016-1201-1 |
2017-03-01 | This paper investigates the response of microcantilever and microbridge actuators, under alternating current (AC) and direct current (DC) excitations. The analysis is carried out by simulating the electrical equivalent circuit of the actuators. An analogous circuit model for evaluation of velocity and acceleration in t... | An analysis of electrostatically actuated micro vibrating structures incorporating squeezed film damping effect using an electrical equivalent circuit | 10.1007/s40430-016-0492-z |
2017-03-01 | In this paper, we study the time evolution of the geometric phase and nonlocal correlations for a three-level atom interacting with the quantum field emerged in a nonlinear Kerr medium. We discuss the dependence of the physical quantifiers on the phase damping effect. We examine the effects of the initial state and dif... | Quantum Phase and Nonlocal Correlations for a Three-Level System Interacting with Laser Light in a Nonlinear Kerr Medium Under Decoherence | 10.1007/s10946-017-9626-8 |
2017-03-01 | This paper focuses on the transient nonlinear dynamics and targeted energy transfer (TET) of a Bernoulli–Euler beam coupled to a continuous bistable nonlinear energy sink (NES). This NES comprises a cantilever beam with the partial constrained layer damping (PCLD) and an end mass controlled by a nonlinear magnetostatic... | Highly efficient continuous bistable nonlinear energy sink composed of a cantilever beam with partial constrained layer damping | 10.1007/s11071-016-3220-4 |
2017-03-01 | Due to their low intrinsic damping, stay cables in cable-stayed bridges are vulnerable to dynamic excitation. The cables have often been exhibiting undesirable and excessive vibrations, which result in increasing maintenance frequency and disruption to normal operations of the entire bridges. Mitigation of undesired ca... | Tuned mass-high damping rubber damper on a taut cable | 10.1007/s12205-016-0857-y |
2017-03-01 | A novel micro-vibration sensitive-type high-damping Al matrix composites reinforced with Li_7- x La_3Zr_2- x Nb_ x O_12 (LLZNO, x = 0.25) was designed and prepared using an advanced spark plasma sintering (SPS) technique. The damping capacity and mechanical properties of LLZNO/Al composites (LLZNO content: 0-40 wt.%) w... | Enhanced micro-vibration sensitive high-damping capacity and mechanical strength achieved in Al matrix composites reinforced with garnet-like lithium electrolyte | 10.1007/s11706-017-0363-2 |
2017-03-01 | Carbonate sands comprise typical foundation soils for offshore engineering structures such as oil platforms, found in natural deposits. These sands have a high shear strength but also very high compressibility which characteristics are due to the shape and the low tensile strength of the grains. For the seismic design ... | The behavior of a carbonate sand subjected to a wide strain range of medium-frequency flexural excitation | 10.1007/s40948-016-0045-z |
2017-03-01 | A geometric nonlinear damping is proposed and applied to a quasi-zero stiffness (QZS) vibration isolator with the purpose of improving the performance of low-frequency vibration isolation. The force, stiffness and damping characteristics of the system are presented first. The steady-state solutions of the QZS system ar... | Force and displacement transmissibility of a quasi-zero stiffness vibration isolator with geometric nonlinear damping | 10.1007/s11071-016-3188-0 |
2017-03-01 | The deployment of a synchrophasor-based wide-area measurement system (WAMS) in a power grid largely improves the observability of power system dynamics and the operator’s real-time situational awareness for potential stability issues. The WAMS in many power grids has successfully captured system oscillation events, e.g... | Location methods of oscillation sources in power systems: a survey | 10.1007/s40565-016-0216-5 |
2017-03-01 | In this paper, the performance of multiple tuned liquid damper (MTLD) has been investigated in mitigating the response of a structure under dynamic loading, i.e., harmonic excitation. For comparative study, the responses of single-tuned liquid damper (STLD) have also been considered. A set of experiments are conducted ... | An experimental study on response control of structures using multiple tuned liquid dampers under dynamic loading | 10.1007/s40091-016-0146-5 |
2017-03-01 | Tuned mass dampers (TMDs) are one of the most widely used devices to mitigate vibrations in structures. Usually, in conventional TMDs, viscous dampers convert the energy of vibration into heat. A new type of TMDs, called regenerative TMDs, has been developed. Energy transducers either are coupled to traditional TMDs or... | Development of piezoelectric energy-harvesting tuned mass damper | 10.1007/s11431-016-0280-5 |
2017-03-01 | This paper presents a novel multifunctional magnetic actuator, which not only damp the vibration of machine tools but also measure the cutting force in real time. The actuator is composed of four identical electromagnetic units which are linearized with a novel design strategy. The magnetic force can be delivered in tw... | Active damping of machine tool vibrations and cutting force measurement with a magnetic actuator | 10.1007/s00170-016-9118-y |
2017-03-01 | The concept introduced previously by the authors on the best sound absorber having the maximum allowable efficiency in absorbing the energy of an incident sound field has been extended to arbitrary linear elastic media and structures. Analytic relations have been found for the input impedance characteristics that the b... | Impedance approach to designing efficient vibration energy absorbers | 10.1134/S1063771017020014 |
2017-03-01 | A technique for determining the damping properties of a rigid isotropic material from the experimental data on the damping capacity of elongated cantilever-fixed test specimens due to the internal and external aerodynamic damping is proposed. The following two methods for eliminating the aerodynamic damping component a... | Identification of the damping properties of rigid isotropic materials by studying the damping flexural vibrations of test specimens | 10.3103/S0025654417020108 |
2017-03-01 | This paper is dedicated to exploit the same optimization mechanism of targeted energy transfer under different types of excitation. Specifically, a linear oscillator (LO) coupled with a vibro-impact nonlinear energy sink is analytically studied with an asymptotical method. The optimization mechanism under periodic exci... | Optimization mechanism of targeted energy transfer with vibro-impact energy sink under periodic and transient excitation | 10.1007/s11071-016-3200-8 |
2017-03-01 | This paper is focused on the dynamic characteristics of a flexible rotor with squeeze film damper excited by two frequencies. The multiple harmonic balance method and Runge–Kutta method are combined to analyze the periodic solution and quasi-periodic solution of the system. The nonlinear characteristics discussed are f... | Dynamic characteristics of flexible rotor with squeeze film damper excited by two frequencies | 10.1007/s11071-016-3204-4 |
2017-03-01 | Tuned mass dampers are common solutions for passive control of bridge responses against dynamic loads. The present work concerns multiple-support seismic excitation as the source of dynamic loading and studies TMD performance in controlling consequent vertical response of simply supported steel bridges. TMD parameter o... | Optimal Seismic Control of Steel Bridges by Single and Multiple Tuned Mass Dampers Using Charged System Search | 10.1007/s40999-016-0102-6 |
2017-02-15 | We consider the damped wave equation with Dirichlet boundary conditions on the unit square parametrized by Cartesian coordinates x and y . We assume the damping a to be strictly positive and constant for $$x<\sigma $$ x < σ and zero for $$x>\sigma $$ x > σ . We prove the exact $$t^{-4/3}$$ t - 4 / 3 -decay rate for the... | Optimal decay rate for the wave equation on a square with constant damping on a strip | 10.1007/s00033-017-0781-0 |
2017-02-08 | We study the Cauchy problem for the nonlinear damped wave equation and establish the large data local well-posedness and small data global well-posedness with slowly decaying initial data. We also prove that the asymptotic profile of the global solution is given by a solution of the corresponding parabolic problem, whi... | The Cauchy problem for the nonlinear damped wave equation with slowly decaying data | 10.1007/s00030-017-0434-1 |
2017-02-01 | Squeezed air film between two closely spaced vibrating microstructures is the important source of energy dissipation and has profound effects on the dynamics of microelectromechanical systems (MEMS). Perforations in the design are one of the methods to model these damping effects. The literature reveals that the analyt... | Analytical solution for squeeze film damping of MEMS perforated circular plates using Green’s function | 10.1007/s11071-016-3136-z |
2017-02-01 | In this paper, the solitary waves of a viscous plasma confined in a cylindrical pipe is investigated under two types of boundary condition. By using the reductive perturbation theory, a quasi-KdV equation is derived and a damping solitary wave is obtained. It is found that the damping rate increases with the viscosity ... | Damping solitary wave under the second and third boundary condition of a viscous plasma | 10.1007/s12648-016-0897-7 |
2017-02-01 | In this work a practical demonstration for simultaneous levitation and rotation for a ferromagnetic cylindrical object is presented. A hollow steel cylinder has been arranged to remain suspended stably under I-core electromagnet utilizing dc attraction type levitation principle and then arranged to rotate the levitated... | System and Method for Obtaining Simultaneous Levitation and Rotation of a Ferromagnetic Object | 10.1007/s40031-016-0215-y |
2017-02-01 | In the process of designing a machine tool virtual models are required to predict the dynamic behavior and optimize the machine tool performance. For this purpose, the different influencing factors mass, stiffness and damping properties as well as friction forces, feed drive controls and movements have to be considered... | Modeling of the dynamic behavior of machine tools: influences of damping, friction, control and motion | 10.1007/s11740-016-0704-5 |
2017-02-01 | Magnetorheological dampers are used for semi-active control of the vehicles vibration because of their useful features such as reducing the dynamic tire forces, improvement the ride quality of the passengers and protection of the vehicle from rollover. The dynamic model of these dampers is nonlinear. Therefore, their n... | Active chaos control of a heavy articulated vehicle equipped with magnetorheological dampers | 10.1007/s11071-016-3163-9 |
2017-02-01 | The distributed formation control of fractional-order multi-agent systems is mainly studied under directed communication graphs in this paper. Firstly, a control law with relative damping and communication delay are proposed. Then, some sufficient conditions for achieving formation control are derived using matrix theo... | Distributed formation control of fractional-order multi-agent systems with relative damping and communication delay | 10.1007/s12555-015-0132-x |
2017-02-01 | This paper makes qualitative analysis to the bounded traveling wave solutions for a kind of nonlinear dispersive-dissipative equation, and considers its solving problem. The relation is investigated between behavior of its solution and the dissipation coefficient. Further, all approximate damped oscillatory solutions w... | Qualitative analysis and approximate damped oscillatory solutions for a kind of nonlinear dispersive-dissipative equation | 10.1007/s10255-017-0632-y |
2017-02-01 | An analytical description of a qubit interacting non-linearly and non-resonantly with a lossy cavity via intensity-dependent coupling has been obtained. With the amplitude cavity damping as a particular type of the thermal amplitude reservoir damping, Wehrl entropy and Wehrl density are used to investigate the dynamics... | Stationary phase-space information in a qubit interacting non-linearly with a lossy single-mode field in the off-resonant case | 10.1007/s11082-017-0917-7 |
2017-01-19 | In this paper, we extend the finite propagation speed property for the compressible Euler equations with damping from the three -dimensional case to the general N -dimensional case. Subsequently, blowup results of the N -dimensional compressible Euler equations with damping are obtained. More precisely, we show that if... | Blowup phenomena for the
$$\varvec{N}$$
N
-dimensional compressible Euler equations with damping | 10.1007/s00033-017-0770-3 |
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