publicationDate stringlengths 10 10 | abstract stringlengths 0 37.3k | title stringlengths 1 5.74k | doi stringlengths 11 47 ⌀ |
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2015-01-01 | Cables are structural elements designed to bear tensile forces and experience vibration problems due to their slenderness and low mass. In the field of civil engineering, they are mostly used in bridges where the vibrations are mainly induced by wind, rain, traffic and earthquakes. This paper proposes the use of a tune... | Performance Analysis of Cables with Attached Tuned-Inerter-Dampers | 10.1007/978-3-319-15248-6_44 |
2015-01-01 | Vehicle suspension design is primarily characterised by conflicting targets concerning ride comfort, demanded handling performance qualities and save driving. Recent developments in the field of active and semi-active vehicle suspensions – aiming to dissolve these conflicts as far as possible – derive both from technol... | Virtual chassis tuning with emphasis on the damper characteristics – a method for optimal integrative damper adjustment by means of vertical and lateral dynamics simulation and evaluation criteria | 10.1007/978-3-658-09711-0_22 |
2015-01-01 | This study aims to evaluate the seismic performance of steel frames upgraded with shape memory alloy (SMA)-based self-centering viscous dampers. The proposed Superelastic Viscous Damper (SVD) relies on SMA elements for re-centering capability and employs viscoelastic (VE) damper that consists of two layers of a high da... | Seismic Performance Assessment of Steel Frames Upgraded with Self-Centering Viscous Dampers | 10.1007/978-3-319-15248-6_43 |
2015-01-01 | The vehicle semi-active suspension with magneto-rheological damper(MRD) has been a hot topic since this decade, in which the robust control synthesis considering load variation is a challenging task. In this paper, a new semi-active controller based upon the inverse model and sliding mode control (SMC) strategies is pr... | Semi-active sliding mode control of vehicle suspension with magneto-rheological damper | 10.3901/CJME.2014.0918.152 |
2015-01-01 | In the present chapter some of the most relevant applied forces and joint reaction forces are introduced. There are many types of forces that can be present in multibody systems, such as gravitational forces, spring-damper-actuator forces, normal contact forces, tangential or frictional forces, external applied forces ... | Force Elements and Reaction Forces | 10.1007/978-3-319-16190-7_11 |
2015-01-01 | One of the tasks within the FP7-SERIES project was the creation of a European Platform for Geographically Distributed Tests. This platform was envisioned to be able to deal with different protocols and algorithms so that its users and facilities would not be restricted to one specific protocol. The platform should also... | Geographically Distributed Continuous Hybrid Simulation Tests Using Shaking Tables | 10.1007/978-3-319-10136-1_8 |
2015-01-01 | Coupling of adjacent dissimilar buildings connected by semiactive dampers involving base isolation is one of the more viable techniques against seismic hazards mitigation through which counter-acting forces exert one upon another in addition to isolation effect. The proposed study two buildings of dissimilar in dynamic... | Comparative Study of Seismically Excited Coupled Buildings with VF Damper and LR Bearing | 10.1007/978-81-322-2193-7_86 |
2015-01-01 | Loss of personal mobility is a large and growing issue that can be caused by a variety of medical problems. Knee pain, muscle weakness, and their associated conditions are among the most common causes of impaired walking. Currently, conventional solutions include simple braces, canes, and medication. In more extreme ca... | Novel Quasi-Passive Knee Orthosis with Hybrid Joint Mechanism | 10.1007/978-3-319-10723-3_6 |
2015-01-01 | A solution procedure is proposed to approximate the probability density function (PDF) solution of high-dimensional non-linear systems under Poisson impulses. The PDF solution yields the generalized Fokker–Planck–Kolmogorov (FPK) equation. First a state-space-split method is proposed to reduce the high-dimensional gene... | Approximate Probability Density Function Solution of Multi-Degree-of-Freedom Coupled Systems Under Poisson Impulses | 10.1007/978-3-319-07167-1_19 |
2015-01-01 | Within this contribution, a linear-elastic Laval/Jeffcott rotor is considered, which is symmetrically supported in two identical semi-floating ring bearings. Run-up simulations and bifurcation analyses are carried out to investigate the stability and bifurcation phenomena of the rotor-bearing system. In particular, the... | Stability and bifurcation phenomena of Laval/Jeffcott rotors in semi-floating ring bearings | 10.1007/s11071-014-1759-5 |
2015-01-01 | The goal of this paper is to concentrate on dynamics and vibration attenuation of the electromechanical system flexibly coupled with a baseplate and damped by a double impact element. The model is constructed with four degrees of freedom in the mechanical oscillating part, three translational and one rotational. The sy... | Vibration Attenuation of the Electromechanical System by a Double Impact Element | 10.1007/978-3-319-21206-7_3 |
2015-01-01 | Squeeze Film Dampers (SFDs) are effective means to reduce shaft vibration and eliminate instabilities in high performance rotating machinery. Presently there is a need to characterize the performance of ultra-short length SFDs for aero jet engines where overall weight and space are at a premium. The paper presents forc... | Dynamic Forced Performance of Short Length Open-Ends Squeeze Film Damper with End Grooves | 10.1007/978-3-319-06590-8_70 |
2015-01-01 | Tuned-Mass-Damper (TMD) is a passive control device for vibration control Vibration control of structures. However, the requirement of higher mass ratio restricts its applicability for seismic excitations. The improved performance of TMD is attempted herein by supplementing it with nonlinear restoring devices made of S... | Shape Memory Alloy-Tuned Mass Damper (SMA-TMD) for Seismic Vibration Control | 10.1007/978-81-322-2193-7_108 |
2015-01-01 | A model for a Magneto-Rheological ( MR ) damper based on Artificial Neural Networks ( ANN ) is proposed. The design of the ANN model is focused to get the best architecture that manages the trade-off between computing cost and performance. Experimental data provided from two MR dampers with different properties have be... | Nonparametric Modeling of an Automotive Damper Based on ANN: Effect in the Control of a Semi-active Suspension | 10.1007/978-3-319-11271-8_19 |
2015-01-01 | Energy based seismic analysis is expected to provide better idea for design and damage assessment of structure subjected to seismic load compared to displacement based analysis as former can take care of repeated plastic deformations. However, the approach based on energy concepts has not been explored in depth. At the... | Energy Assessment of Friction Damped Two Dimensional Frame Subjected to Seismic Load | 10.1007/978-81-322-2193-7_100 |
2015-01-01 | In the last three decades, there has been great deal of interest in the use of control systems to mitigate the effects of dynamic environmental hazards like earthquake and strong winds on the civil engineering structures. A variety of control systems have been considered for these applications that can be classified as... | Seismic and Wind Response Reduction of Benchmark Building Using Viscoelastic Damper | 10.1007/978-81-322-2193-7_112 |
2015-01-01 | Since hysteretic dampers have nonlinear restoring-force characteristics with sensitive plastic flow and input earthquake ground motions propagating random media are extremely random in time and frequency domains, the seismic response of a building structure with hysteretic dampers deviates greatly depending on the inst... | Optimal Placement of Hysteretic Dampers via Adaptive Sensitivity-Smoothing Algorithm | 10.1007/978-3-319-18320-6_13 |
2015-01-01 | The dynamic properties of automotive chassis are affected by several different factors. Especially with respect to transmission of structure-borne sound, flexible bearings in chassis play an important role. In contrast to elastomer bushings, friction afflicted ball joints have not yet been studied with regard to this s... | Motion behaviour of ball joints in automotive chassis with respect to structure-borne sound | 10.1007/978-3-658-08844-6_91 |
2015-01-01 | Nowadays, proportional integral derivative (PID) controller is the most popular control algorithm applied in engineering systems and has been generally accepted in industrial control. Recent developments in commercial vehicles have heightened the need for improving the ride comfort. The application of magnetorheologica... | Vibration Control of Semi-active MR Seat Suspension for Commercial Vehicles Using Genetic PID Controller | 10.1007/978-3-319-09918-7_64 |
2015-01-01 | Humanoid robot requires a robust prevention system against external disturbances to protect itself from falling to the ground and to perform its tasks completely. In this paper, a Falling Prevention System for humanoid robot is proposed to avoid falling from the disturbances, and helps humanoid robot recover its balanc... | Falling Prevention System from External Disturbances for Humanoid Robots | 10.1007/978-3-319-16841-8_10 |
2015-01-01 | Magneto-rheological (MR) fluid damper is a semi-active control device that has recently received more attention because they offer the adaptability of active control devices without requiring the associated large power sources. But inherent nonlinear nature of the MR fluid damper is one of the challenging aspects for u... | Hysteresis modeling of magneto-rheological damper using self-tuning Lyapunov-based fuzzy approach | 10.1007/s12541-015-0004-6 |
2015-01-01 | Rail dampers are designed to reduce the rail component of rolling noise by increasing the attenuation with distance along the rail (decay rate, DR). There is no standardized method to assess the performance of rail dampers. The method described here, developed during the Franco-German STARDAMP project, uses laboratory ... | Estimating the Performance of Rail Dampers Using Laboratory Methods and Software Predictions | 10.1007/978-3-662-44832-8_7 |
2015-01-01 | This article considers the dynamic analysis and semiactive vibration control on a building-like structure, excited on its base through an external force generated by an electromechanical shaker providing harmonic and seismic motion at the base of the overall structure. The mathematical model of the overall system is ob... | Semiactive Vibration Control in a Three-Story Building-Like Structure Using a Magnetorheological Damper | 10.1007/978-3-319-15248-6_48 |
2014-12-12 | PACS: 07.10.Cm (Micromechanical devices and systems), 46.40.Ff (Resonance and damping of mechanical waves), 07.79.-v (Scanning probe microscopes and components), 07.07.Df (Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing). Background The functionality of atomic force microscopy (AFM) and nan... | Influence of squeeze-film damping on higher-mode microcantilever vibrations in liquid | 10.1140/epjti/s40485-014-0010-6 |
2014-12-01 | Present guidelines indicate the need to deorbit new satellites launched into low Earth orbit (LEO) within 25 years from their end of life. Our research task is to develop a new technology suitable to deorbit a satellite at the end of life with as small an impact as possible on the mass budget of the mission. An alterna... | Two-bar model for free vibrations damping of space tethers by means of spring-dashpot devices | 10.1007/s12567-014-0065-x |
2014-12-01 | To maximize stability in a constant-speed hydromechanical system, close attention must be paid to parameter selection in the dynamic vibrational damper within the centrifugal regulator. | Dynamic vibrational damping within a constant-speed hydromechanical system | 10.3103/S1068798X14120259 |
2014-12-01 | We consider the Timoshenko model for vibrating beams under effect of two nonlinear and localized frictional damping mechanisms acting on the transverse displacement and on the rotational angle. We prove that the damping placed on an arbitrarily small support, unquantitized at the origin and without assuming equal speed... | Uniform decay rates for the energy of Timoshenko system with the arbitrary speeds of propagation and localized nonlinear damping | 10.1007/s00033-013-0380-7 |
2014-12-01 | A displacement-based design (DBD) procedure aiming to proportion hysteretic damped braces (HYDBs) in order to attain, for a specific level of seismic intensity, a designated performance level of a structure is proposed for the retrofitting of framed buildings. A key step for the reliability of the DBD procedure is the ... | Equivalent viscous damping for displacement-based seismic design of hysteretic damped braces for retrofitting framed buildings | 10.1007/s10518-014-9601-5 |
2014-12-01 | This paper is devoted to studying the effects of a vanishing structural damping on the controllability properties of the one dimensional linear beam equation. The vanishing term depends on a small parameter ɛ ∈ (0, 1). We study the boundary controllability properties of this perturbed equation and the behavior of its b... | Uniform controllability for the beam equation with vanishing structural damping | 10.1007/s10587-014-0140-7 |
2014-12-01 | Single machine infinite bus (SMIB) power system and multi-machine power system (MMPS) stability improvement by tuning of static var compensator (SVC) based controller parameters are investigated in the proposed method. The design problem is formulated as an optimization problem with a time-domain simulation-based objec... | Improvement of power system stability using genetically optimized SVC controller | 10.1007/s13198-014-0233-6 |
2014-12-01 | This paper deals with the analysis of active constrained layer damping (ACLD) of large amplitude vibrations of smart magneto–electro–elastic (MEE) doubly curved shells. The constraining layer of the ACLD treatment is composed of the vertically/obliquely reinforced 1–3 piezoelectric composite (PZC). The constrained visc... | Active control of large amplitude vibrations of smart magneto–electro–elastic doubly curved shells | 10.1007/s10999-014-9252-3 |
2014-12-01 | Highly concentrated colloidal suspensions exhibit a discontinuous shear-thickening behaviour. The transition from a low to a high viscosity state is associated to a large energy dissipation. This effect could find applications in structural damping while the viscosity increase brings added stiffness. In the present wor... | Energy dissipation in concentrated monodisperse colloidal suspensions of silica particles in polyethylene glycol | 10.1007/s00396-014-3378-6 |
2014-12-01 | Relaxation time spectra (RTS) derived from time domain induced polarization data (TDIP) are helpful to assess oil reservoir pore structures. However, due to the sensitivity to the signal-to-noise ratio (SNR), the inversion accuracy of the traditional singular value decomposition (SVD) inversion method reduces with a de... | A time domain induced polarization relaxation time spectrum inversion method based on a damping factor and residual correction | 10.1007/s12182-014-0367-9 |
2014-12-01 | Hydrodynamic coefficients due to horizontal oscillation in surge motion for a floating, hollow cylinder placed above a fixed, coaxial, bottom-mounted cylinder are investigated within the framework of linear, water wave theory. This problem of radiation by this specific pair of two cylinders can be considered as a wave ... | Hydrodynamic coefficients in surge for a radiating hollow cylinder placed above a coaxial cylinder at finite ocean depth | 10.1007/s00773-014-0280-3 |
2014-12-01 | This paper presents the results of nonlinear finite element analyses conducted on stainless steel shear links. Stainless steels are attractive materials for seismic fuse device especially for corrosion-aware environment such as coastal regions because they are highly corrosion resistant, have good ductility and toughne... | Numerical study of the cyclic load behavior of AISI 316L stainless steel shear links for seismic fuse device | 10.1007/s11709-014-0276-4 |
2014-12-01 | This article extends a signal-based approach formerly proposed by the authors, which utilizes the fractal dimension of time frequency feature (FDTFF) of displacements, for earthquake damage detection of moment resist frame (MRF), and validates the approach with shaking table tests. The time frequency feature (TFF) of t... | Experimental validation of a signal-based approach for structural earthquake damage detection using fractal dimension of time frequency feature | 10.1007/s11803-014-0271-8 |
2014-12-01 | The transfer matrix method is a rather unusual strategy of modeling linear multibody systems, however, it is able to elegantly model systems including both discrete and continuous elements and to solve such kind of problems with any precision required. This is achieved by transforming differential to algebraic equation... | Recursive eigenvalue search algorithm for transfer matrix method of linear flexible multibody systems | 10.1007/s11044-013-9399-y |
2014-11-28 | In this paper, we are concerned with a nonlinear coupled viscoelastic wave equations with initial-boundary value conditions and nonlinear damping and source terms. Under suitable assumptions on relaxation functions, damping terms, and source terms, by using the energy method we proved a global nonexistence result for c... | Global nonexistence of solutions for nonlinear coupled viscoelastic wave equations with damping and source terms | 10.1186/s13661-014-0250-z |
2014-11-01 | The effects of annealing on the Gilbert damping constant and the magnetic properties are investigated in CoFeB films sandwiched by either Ta, Ru, or Pd layers. As the annealing temperature increases, the damping constant is found to be slightly decreased first and then, rapidly increased. The minimum damping constant i... | Optimization of the Gilbert damping constant by annealing CoFeB films sandwiched by Ta, Ru, and Pd layers | 10.3938/jkps.65.1611 |
2014-11-01 | The logarithmic decrement of damped vibrations of materials is determined using a theoretical-experimental method. The method is based on measuring the deflection amplitudes of flat cantilever test specimens during their damped vibrations according to the first resonance mode, on the description of internal viscous fri... | Theoretical-Experimental Method for Determining the Parameters of Damping Based on the Study of Damped Flexural Vibrations of Test Specimens. 3. Identification of the Characteristics of Internal Damping | 10.1007/s11029-014-9451-x |
2014-11-01 | We explore the notion of resonant absorption in a dynamic time-dependent magnetised plasma background. Very many works have investigated resonance in the Alfvén and slow MHD continua under both ideal and dissipative MHD regimes. Jump conditions in static and steady systems have been found in previous works, connecting ... | Resonant Damping of Propagating Kink Waves in Time-Dependent Magnetic Flux Tube | 10.1007/s11207-014-0569-8 |
2014-11-01 | After a brief review of the history of viscosity from classical to quantal fluids, a discussion of how the shear viscosity η of a finite hot nucleus is calculated directly from the width and energy of the giant dipole resonance (GDR) of the nucleus is given in this paper. The ratio η / s with s being the entropy volume... | Viscosity: From air to hot nuclei | 10.1007/s12043-014-0857-8 |
2014-11-01 | This paper proposes the use of the non-time based control strategy named Delayed Reference Control (DRC) to the control of industrial robotic cranes. Such a control scheme has been developed to achieve two relevant objectives in the control of autonomous operated cranes: the active damping of undesired load swing, and ... | A Non-Time Based Controller for Load Swing Damping and Path-Tracking in Robotic Cranes | 10.1007/s10846-014-0036-7 |
2014-11-01 | This paper proposes a variable walking trajectory generation method for biped robots based on redundancy analysis. In designing a bipedal trajectory for locomotion, maintaining locomotion stability without falling down and natural patterns of the locomotion are important. First, the positions and orientations of the fe... | Variable walking trajectory generation method for biped robots based on redundancy analysis | 10.1007/s12206-014-1007-4 |
2014-11-01 | This paper presents a novel method, based on the particle impact damping (PID), for the attenuation of regenerative vibration in boring operation. A specially designed boring bar having a cavity near machining-end for partial filling of spherical particles has been developed. Characteristics of boring bar with and with... | Investigation into effect of particle impact damping (PID) on surface topography in boring operation | 10.1007/s00170-014-6201-0 |
2014-11-01 | The flexural and vibration properties were examined in order to evaluate the anti-vibration characteristics of rubber modified reinforced concrete beam. The rubberised mixtures were produced by replacing 5, 7.5, and 10 % by mass of the fine aggregate with 1–4 mm scrap truck tyre crumb rubber particles. A series of rein... | Anti-vibration characteristics of rubberised reinforced concrete beams | 10.1617/s11527-013-0151-0 |
2014-11-01 | Continuing on the recent observation that sudden death of entanglement can occur even when a single qubit of a 2-qubit state is exposed to noisy environment (Yashodamma and Sudha in Results Phys 3:41–45, 2013 ), we examine the local action of a noise on bipartite qubit–qutrit and qutrit–qutrit systems. We show that dep... | Effectiveness of depolarizing noise in causing sudden death of entanglement | 10.1007/s11128-014-0812-0 |
2014-11-01 | The paper is devoted to description of certain ways of extending the domain of convergence of Newton’s method. This paper is a survey of contributions of representatives of Soviet and Russian mathematical school, namely, Kalitkin, Puzynin, Madorskij and others. They introduced different kinds of damping multiplier and ... | Modifications of Newton’s method to extend the convergence domain | 10.1007/s40324-014-0020-y |
2014-11-01 | Vibrations generated by blasting carried out during the quarrying of material induce dynamic stresses that can give rise to damage of diverse considerations in surrounding buildings and structures. The adverse effects of vibrations caused by explosives used in mining and civil works can be controlled by suitably planni... | Influence of depth and geological structure on the transmission of blast vibrations | 10.1007/s10064-014-0595-7 |
2014-11-01 | Absorption systems observed along the line of sights to distant quasars are observed at all redshifts and the full range of the electromagnetic spectrum is needed to recover the variety of transitions of different elements. However, some important elements are found within the Lyman forest and their absorption line pro... | DLA abundances in the CUBES’s spectral window | 10.1007/s10509-014-2017-5 |
2014-10-16 | We study periodic solutions of the suspension bridge model proposed by Lazer and McKenna with a periodic damping term. Under the Dolph-type condition and a small periodic damping term condition, the existence and the uniqueness of a periodic solution have been proved by a constructive method. Two numerical examples are... | Periodic oscillation in suspension bridge model with a periodic damping term | 10.1186/s13661-014-0231-2 |
2014-10-16 | The long time behavior of the solutions for the strongly damped wave equation is considered with nonlinear damping, a nonlinear forcing term, and with a periodic boundary condition. We prove that the global attractor which captures all trajectories in H 1 ( Ω ) × L 2 ( Ω ) is a compact set in H 2 ( Ω ) × H 1 ( Ω ) . MS... | Regularity of the attractor for strongly damped wave equations with nonlinearity | 10.1186/1029-242X-2014-396 |
2014-10-01 | Accurate determination of the squeeze-film damping in rare air is crucial for the design of high- Q MEMS devices. In the past, for the MEMS structures with no perforations, there have been two approaches to treating the squeeze-film damping in rare air: the approach based on the continuum assumption and the approach us... | A numerical molecular dynamics approach for squeeze-film damping of perforated MEMS structures in the free molecular regime | 10.1007/s10404-014-1349-3 |
2014-10-01 | The initial boundary value problem for nonlinear wave equations of Kirchhoff systems with memory type in a bounded domain is considered. By modifying the method introduced in a work by Autuori et al. (Arch Rational Mech Anal 196:489–516, 2010 ), we establish the nonexistence result of global solutions with the initial ... | Global nonexistence for nonlinear Kirchhoff systems with memory term | 10.1007/s00033-013-0367-4 |
2014-10-01 | A nonlinear impact damping model of single-degree-of-freedom spur cylindrical gear with backlash and time-varying stiffness was established. Systematic analyses of the dynamic responses were performed. First, the nonlinear damping coefficient was considered as a constant parameter with two types of compliance exponent,... | Effect of nonlinear impact damping with non-integer compliance exponent on gear dynamic characteristics | 10.1007/s11771-014-2355-z |
2014-10-01 | We study oscillatory properties of solutions to a class of nonlinear second-order differential equations with a nonlinear damping. New oscillation criteria extend those reported in [ROGOVCHENKO, Yu. V.—TUNCAY, F.: Oscillation criteria for second-order nonlinear differential equations with damping , Nonlinear Anal. 69 (... | Oscillation of second-order nonlinear differential equations with damping | 10.2478/s12175-014-0271-1 |
2014-10-01 | Particle damping is a derivative of impact damping, which can be used to achieve structural damping. Real-time applications of particle damping are scarce in literature. For this study, a boring bar, filled with various metal particles, was used for internal turning operation, and the impacts on the surface roughness ... | Impact of Particle Damping Parameters on Surface Roughness of Bored Surface | 10.1007/s13369-014-1209-1 |
2014-10-01 | The authors study decay properties of solutions for a viscoelastic wave equation with variable coefficients and a nonlinear boundary damping by the differential geometric approach. | General decay rate estimates for viscoelastic wave equation with variable coefficients | 10.1007/s11424-014-1056-x |
2014-10-01 | This paper estimates fundamental translational period and damping ratio parameters and examines the changes in dynamic characteristics of a set of low-to-medium rise buildings in Lorca town (SE of Spain) affected by the May 11th, 2011 earthquake. These building parameters have been calculated analysing structural dynam... | Changes in dynamic characteristics of Lorca RC buildings from pre- and post-earthquake ambient vibration data | 10.1007/s10518-013-9489-5 |
2014-10-01 | The equation considered in this paper is $$x'' + h(t)\:x'|x'| + \omega^2\sin x = 0,$$ x ′ ′ + h ( t ) x ′ | x ′ | + ω 2 sin x = 0 , where h ( t ) is continuous and nonnegative for $${t \geq 0}$$ t ≥ 0 and ω is a positive real number. This may be regarded as an equation of motion of an underwater pendulum. The damping f... | Asymptotic stability of a pendulum with quadratic damping | 10.1007/s00033-013-0361-x |
2014-10-01 | Studies of thermal fluctuations in discocytes, echinocytes, and spherocytes suggest that the coupling between lipid bilayer and cytoskeleton can affect viscoelastic behavior of single erythrocyte membranes. To test this hypothesis, we developed a 3D constitutive model describing viscoelastic behavior of erythrocyte mem... | Modeling analysis of the lipid bilayer–cytoskeleton coupling in erythrocyte membrane | 10.1007/s10237-014-0559-7 |
2014-10-01 | In this work, we study the synchronization of two coupled chaotic oscillators. The uncoupled system corresponds to a mass attached to a nonlinear spring and driven by a rolling carpet. For identical oscillators, complete synchronization is analyzed using Lyapunov stability theory. This first analysis reveals that stabi... | Effect of coupling, synchronization of chaos and stick-slip motion in two mutually coupled dynamical systems | 10.1007/s11071-014-1504-0 |
2014-10-01 | Analysis of experimental data shows that the nature of the oscillating motion of an aircraft does not depend uniquely on the value of the coefficients of aerodynamic damping derivatives. The present work makes an attempt to explain this phenomenon and develops a methodology to adequately characterize the oscillating mo... | Method determining the nature of oscillating motion of the aircraft based on the analysis of coefficients of aerodynamic damping derivatives | 10.1134/S0869864314050060 |
2014-10-01 | Nonlinear damping suspension is a promising method to be used in a rotor-bearing system for vibration isolation between the bearing and environment. However, the nonlinearity of the suspension may influence the stability of the rotor-bearing system. In this paper, the motions of a flexible rotor in short journal bearin... | Effects of nonlinear damping suspension on nonperiodic motions of a flexible rotor in journal bearings | 10.1007/s11071-014-1526-7 |
2014-10-01 | In order to solve fretting instability problem of gear shaft shoulder due to torsional vibration in mechanical system, the mathematical model of fretting instability vibration of gear shaft shoulder was established by adopting the method of combining kinematics and tribology, and the numerical analysis was applied to t... | Fretting instability characteristics for gear shaft shoulder | 10.1007/s11771-014-2358-9 |
2014-10-01 | Most of modern tall buildings using lighter construction materials with high strength and less stiffness are more flexible, which occurs excessive wind-induced vibration, resulting in occupant discomfort and structural unsafety. It is necessary to predict wind-induced vibration response and find out a method to mitigat... | Passive control of along-wind response of tall building | 10.1007/s11771-014-2388-3 |
2014-10-01 | In this paper, we obtain the critical exponent for a wave equation with structural damping and nonlinear memory: $$ u_{tt}-\triangle u + \mu\,(-\triangle)^{\frac12} u_t = \int\nolimits_0^t (t-s)^{-\gamma}\,|u(s,\cdot)|^p\,ds,$$ u t t - ▵ u + μ ( - ▵ ) 1 2 u t = ∫ 0 t ( t - s ) - γ | u ( s , · ) | p d s , where μ > 0.... | A wave equation with structural damping and nonlinear memory | 10.1007/s00030-014-0265-2 |
2014-10-01 | The problem of minimizing the dynamics response of a damped cantilever Timoshenko beam subjected to earthquake excitation is investigated in this paper. The ground acceleration is expressed in terms of a Fourier series that is modulated by an enveloping function. The method of lines and modal approach are developed for... | Dynamics and magneto-rheological control of vibration of cantilever Timoshenko beam under earthquake loads | 10.1007/s11071-014-1429-7 |
2014-09-10 | This paper is concerned with the Cauchy problem of nonlinear wave equations with potential, strong, and nonlinear damping terms. Firstly, by using variational calculus and compactness lemma, the existence of standing waves of the ground states is obtained. Then the instability of the standing wave is shown by applying ... | Standing waves and global existence for nonlinear wave equations with potential, strong, and nonlinear damping terms | 10.1186/s13661-014-0144-0 |
2014-09-01 | The experimental equipment, model, test conditions, and methods used for determining the streamwise damping on a setup with free oscillations on rolling bearings are described. Characteristics of aerodynamic damping of the model with two positions of the rotation axis and Mach numbers M_∞ = 2, 4, and 6 are measured. Ir... | Damping characteristics of a reentry vehicle at hypersonic velocities | 10.1134/S0021894414050162 |
2014-09-01 | The dynamic Hartree-Fock theory with point-like interaction is used to calculate the speed of sound and damping factor of a zero-sound wave propagating in a degenerate Fermi gas. This wave propagates slower than Fermi velocity. It is shown, that if the interaction is weak and density is small, then the damping of such ... | “Slow” wave of zero-sound in degenerate Fermi gas | 10.2478/s11534-014-0491-6 |
2014-09-01 | An analytical model based on a nonlinear deflection equation and the Reynolds equation is proposed to describe the dynamic behavior of an electrically actuated micro-beam with two piezoelectric layers. The proposed model takes explicit account of the fringing field effect, the axial stress effect, the residual stress e... | Analysis of nonlinear dynamic behavior of electrically actuated micro-beam with piezoelectric layers and squeeze-film damping effect | 10.1007/s11071-014-1384-3 |
2014-09-01 | This paper deals with the nonlinear vibration of a beam subjected to a tensile load and carrying multiple spring–mass–dashpot systems. The nonlinearity is attributable to mid-plane stretching, damping, and spring constant. Explicit expressions are presented for the frequency equations, mode shapes, nonlinear frequency,... | Nonlinear vibration of an axially loaded beam carrying multiple mass–spring–damper systems | 10.1007/s11071-014-1402-5 |
2014-09-01 | The Hopf and double Hopf bifurcations analysis of asymmetrical rotating shafts with stretching nonlinearity are investigated. The shaft is simply supported and is composed of viscoelastic material. The rotary inertia and gyroscopic effect are considered, but, shear deformation is neglected. To consider the viscoelastic... | Hopf bifurcation analysis of asymmetrical rotating shafts | 10.1007/s11071-014-1367-4 |
2014-09-01 | Ring-opening copolymerization of caprolactone and glycidyl methacrylate can generate cyclic and linear double-bond-functionalized copolymers. These polymers can be cross-linked by thiol–ene click reaction, and/or radical copolymerized with 2-hydroxyethyl methacrylate. Networks having interesting and variable damping pr... | Cross-linking and damping properties of poly(caprolactone-co-glycidyl methacrylate) | 10.1038/pj.2014.29 |
2014-09-01 | Using the IWOP technique, Wigner function theory and TFD theory, the quantization of a mesoscopic biological cell equivalent circuit is proposed, The quantum fluctuations of the mesoscopic biological cell are researched in thermal vacuum state and vacuum state. It is shown that the IWOP technique, Wigner function theor... | The IWOP Technique and Wigner-Function Approach to Quantum Effect of Mesoscopic Biological Cell | 10.1007/s10773-014-2114-9 |
2014-09-01 | The problems of optimal design of structure-inhomogeneous thermostabilizing constructions have been investigated. Variational problems of the optimal design of structure-inhomogeneous thermostabilizing constructions have been formulated. The parameters determining the physicomechanical and geometric structures of the c... | Methods of Investigating the Limiting Possibilities of Structure-Inhomogeneous Thermostabilizing Constructions | 10.1007/s10891-014-1104-3 |
2014-09-01 | Magnetorheological (MR) damper is one of the most advanced applications of semi active damper in controlling vibration. Due to its continuous controllability in both on and off state its practice is increasing day by day in the vehicle suspension system. MR damper’s damping force can be controlled by changing the visco... | Optimal design of Magneto-Rheological damper comparing different configurations by finite element analysis | 10.1007/s12206-014-0828-5 |
2014-09-01 | An innovative variable stiffness device is proposed and investigated based on numerical simulations. The device, called a folding variable stiffness spring (FVSS), can be widely used, especially in tuned mass dampers (TMDs) with adaptive stiffness. An important characteristic of FVSS is its capability to change the sti... | A novel semi-active TMD with folding variable stiffness spring | 10.1007/s11803-014-0258-5 |
2014-09-01 | Isolation bearings and dampers are often installed between piers and superstructures to reduce the seismic responses of bridges under large earthquakes. This paper presents a novel steel damper for bridges. The damper employs steel plates as energy dissipation components, and adopts a vertical free mechanism to achieve... | Development of steel dampers for bridges to allow large displacement through a vertical free mechanism | 10.1007/s11803-014-0249-6 |
2014-09-01 | An improved hydraulic yaw damper model with series in-service clearance and comprehensive stiffness was proposed by Wang et al. (Nonlinear Dyn 65(1–2):13–34 2011 ). In order to study how in-service parameter variations to the hydraulic yaw damper affect the dynamics of a Chinese $$\hbox {SS}_{9}$$ SS 9 locomotive, this... | A locomotive’s dynamic response to in-service parameter variations of its hydraulic yaw damper | 10.1007/s11071-014-1393-2 |
2014-08-20 | In the case where nonlinearities are superquadratic at infinity, we study the existence of ground state homoclinic orbits for damped vibration systems without periodic conditions by using variational methods. Here the (local) Ambrosetti-Rabinowitz superquadratic condition is replaced by a general superquadratic conditi... | Ground state homoclinic orbits of superquadratic damped vibration systems | 10.1186/1687-1847-2014-230 |
2014-08-01 | We present an experimental study about the vortex dynamics in liquid metal flow under the influence of confined non-homogeneous magnetic field, so-called magnetic obstacle. A permanent magnet installed on a moving rail beneath a cell, filled with eutectic alloy GaInSn, moves with constant velocities with the correspond... | Vortex dynamics in the wake of a magnetic obstacle | 10.1007/s12650-014-0204-7 |
2014-08-01 | A series of shake-table tests was conducted by inserting and replacing 4 different types of dampers, or by removing them in a full-scale 5-story steel frame building. The objective is to validate response-control technologies that are increasingly adopted for major Japanese buildings without being attested to-date by a... | Full-scale dynamic testing of response-controlled buildings and their components: concepts, methods, and findings | 10.1007/s11803-014-0246-9 |
2014-08-01 | The dissipative properties of most structural materials are usually described by a viscous damping parameter determining the rate of energy dissipation. The parameter stem from the traditionally adopted rheological Kelvin model. However, the analytical description of the dynamic properties of modern structural material... | An identification of nonlinear dissipative properties of constructional materials at dynamical impact loads conditions | 10.1007/s11012-014-9931-z |
2014-08-01 | The membranous utricle sac of the red-eared turtle was mounted in a piezoelectric actuated platform mounted on the stage of a light microscope. The piezoelectric actuator oscillated the base of the neuroepithelium along a linear axis. Displacements were in the plane of the utricle and consisted of a linear sinusoidal-s... | Experimental Measurement of Utricle System Dynamic Response to Inertial Stimulus | 10.1007/s10162-014-0456-x |
2014-08-01 | The analytic function of relativistic nonextensive distribution is given, and employed to solve the Landau damping of longitudinal oscillation in ultra-relativistic plasmas. The unified expression of Landau damping which reduces to the result in relativistic Maxwellian distributed plasmas in the extensive limit is obta... | Landau damping of longitudinal oscillation in ultra-relativistic plasmas by analytic function of nonextensive distribution | 10.1007/s10509-014-1917-8 |
2014-08-01 | A numerical study of an application of magnetorheological (MR) damper for semi-active control is presented in this paper. The damper is mounted in the suspension of a Duffing oscillator with an attached pendulum. The MR damper with properties modelled by a hysteretic loop, is applied in order to control of the system r... | Magnetorheological damping and semi-active control of an autoparametric vibration absorber | 10.1007/s11012-014-9892-2 |
2014-08-01 | Metal passive energy dissipation dampers are widely used in building structures, but research into their use in high-voltage electrical installations has been limited. This paper employs the passive energy dissipation method for a high-voltage arrester as an example. Metal energy dissipation dampers are designed using ... | Damping Efficiency Analysis of Metal Dampers for a High-Voltage Electrical Arrester | 10.1007/s13369-014-1291-4 |
2014-08-01 | Damping performance of a passive constrained layer damping (PCLD) structure mainly depends on the geometric layout and physical properties of the viscoelastic damping material. Properties such as the shear modulus of the damping material need to be tailored for improving the damping of the structures. This paper presen... | Topology optimization of microstructures of viscoelastic damping materials for a prescribed shear modulus | 10.1007/s00158-014-1049-3 |
2014-08-01 | Silica gel, a typical desiccant widely used in industry to absorb moisture, is a porous inert colloid with different sizes in beaded or angular shape. The mixture of silica gel and pore fluid of matched refractive index has been used as transparent media to mimic the behavior of sand. Previous studies have been focused... | Investigation on the shear moduli and damping ratios of silica gel | 10.1007/s10035-014-0495-3 |
2014-08-01 | This paper presents the design, formulation, and performance optimization of a new hybrid electromagnetic damper in response to the demand for a tunable, regenerative and fail-safe damping device for various applications. Damping in a multitude of engineering applications has a variable threshold requirement based on s... | Hybrid variable damping control: design, simulation, and optimization | 10.1007/s00542-014-2214-8 |
2014-08-01 | Clay soils are very useful as liners in geotechnical structures such as landfill sites, dams, water channels, etc. Swelling is a common problem in clay liners, however. To better understand swelling properties, in the present study clay nanocomposites were produced by means of the sol gel method, using a hydrophobic cl... | The Dynamic Shear Modulus and Damping Ratio of Clay Nanocomposites | 10.1346/CCMN.2014.0620405 |
2014-08-01 | Fluid viscous dampers are extensively adopted as efficient and cheap energy dissipation devices in structural seismic protection. If we consider the usefulness of these passive control devices, the exact recognition of their mechanical behavior is of outstanding importance to provide a reliable support to design a very... | A comparative study on parameter identification of fluid viscous dampers with different models | 10.1007/s00419-014-0869-3 |
2014-08-01 | This paper deals with a novel type of the friction damping brace systems and its development using slip resistance for seismic retrofitting of damaged structures. In the system, slotted bolt holes are placed on the shear faying surface with a view to dissipating a considerable amount of passive energy. Superelastic sha... | Performance-based optimal design of self-centering friction damping brace systems between recentering capability and energy dissipation | 10.1007/s12206-014-0721-2 |
2014-07-30 | This paper proposes designing of Static Synchronous Series Compensator (SSSC) based damping controller to enhance the stability of a Single Machine Infinite Bus (SMIB) system by means of Invasive Weed Optimization (IWO) technique. Conventional PI controller is used as the SSSC damping controller which takes rotor speed... | Design of static synchronous series compensator based damping controller employing invasive weed optimization algorithm | 10.1186/2193-1801-3-394 |
2014-07-01 | Every transducer needs some deconvolution operation to return the original signal. In the seismometer’s case, this is usually done by using the pole-zero instrument models. This method assumes that the seismometer can be described by a linear model that can be schematized by a ratio of polynomials of the Laplace variab... | Deconvolving seismic signals with a SPICE model of the seismometer | 10.1007/s10950-014-9425-4 |
2014-07-01 | The aerodynamic component of damping of a vibrating plate in the range of parameters characteristic of damped flexural vibrations of test specimens is investigated. On the basis of a large series of numerical simulations in the dynamics of two-dimensional flow of gas around a plate, we managed to suggest a unified appr... | Theoretical-Experimental Method for Determining the Parameters of Damping Based on the Study of Damped Flexural Vibrations of Test Specimens 2. Aerodynamic Component of Damping | 10.1007/s11029-014-9413-3 |
2014-07-01 | NiTi exhibits distinct damping properties associated with the martensite-austenite transformation. We fabricated net-shape NiTi parts layer-by-layer using a laser beam that locally melted the NiTi powder. The damping properties of such NiTi parts were analyzed by the decay of cantilever vibrations in comparison to conv... | Damping of Selective-Laser-Melted NiTi for Medical Implants | 10.1007/s11665-014-0889-8 |
2014-07-01 | For structures deployed in space using cables where vibration damping is critical for structural stability, cable damping is significant to structural performance. To provide a better understanding of damping mechanism of carbon fiber cables, this paper describes the tests of cable damping under different experimental ... | Experimental and Analytical Investigation of Carbon Fiber Cable Vibration Damping | 10.1007/s11340-014-9878-y |
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