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2017-01-09 | In this paper, we study a Timoshenko system with local Kelvin–Voigt damping, which models the dynamics of a beam. We prove that the energy of the system decays exponentially or polynomially and the decay rate depends on properties of material coefficient function. The method is based on the frequency analysis and inequ... | Stability of a Timoshenko system with local Kelvin–Voigt damping | 10.1007/s00033-016-0765-5 |
2017-01-01 | This chapter discusses three typical topics of rotor dynamics problems: internal/external damping effects, vibration due to non-symmetrical shaft stiffness and thermal unbalance behavior. Though a rotor should rotate in a stable manner in a rotation test, problems are encountered in some cases. Most of the problems are... | Stability Problems in Rotor Systems | 10.1007/978-4-431-55456-1_11 |
2017-01-01 | We conduct a series of tensile analyses on metal-plate specimens to investigate the relation between the fatigue level and the material’s response to external loads. We use Electronic Speckle-Pattern Interferometery (ESPI) to measures the in-plane displacement, and an acoustic transducer to assess the elastic modulus o... | Dynamic Deformation with Static Load | 10.1007/978-3-319-41600-7_3 |
2017-01-01 | This paper deals with a class of elastic systems with structural damping subject to nonlocal conditions. By using a suitable measure of noncompactness on the space of continuous functions on the half-line, we establish the existence of mild solutions with explicit decay rate of exponential type. An example is given to ... | Decay mild solutions for elastic systems with structural damping involving nonlocal conditions | 10.3103/S1063454117010083 |
2017-01-01 | This work looks at the effectiveness of constant weight metastructures for vibration suppression. A metastructure is a structure with distributed vibration absorbers. The metastructures are compared to a baseline structure of equal mass. The equal mass constraint shows that any increase in performance is due to the add... | Constant Mass Metastructure with Vibration Absorbers of Linearly Varying Natural Frequencies | 10.1007/978-3-319-54810-4_16 |
2017-01-01 | True behaviour of an arbitrary structural system is dynamic and nonlinear. To analyze this behaviour in many real cases, e.g. structures in regions under high seismic risk, a versatile approach is to discretize the mathematical model in space, and use direct time integration to solve the resulting initial value problem... | Integration Step Size and Its Adequate Selection in Analysis of Structural Systems Against Earthquakes | 10.1007/978-3-319-47798-5_10 |
2017-01-01 | With regard to G.H. Bryan’s publication in 1890, we call the following Bryan’s law (or Bryan’s effect): “The vibration pattern of a revolving cylinder or bell revolves at a rate proportional to the inertial rotation rate of the cylinder or bell”. Bryan’s factor is the proportionality constant that can be theoretically ... | On Electronically Restoring an Imperfect Vibratory Gyroscope to an Ideal State | 10.1007/978-3-319-56050-2_12 |
2017-01-01 | This chapter specifies the definitions, calculation and measurement of basic vibration properties: natural frequency, modal damping, resonance and Q -value ( Q -factor) Q-value (Q-factor) . Basic properties featuring in a vibrating system, which are obtained from the free vibration waveform, are: Natural frequency Natu... | Basics for a Single-Degree-of-Freedom Rotor | 10.1007/978-4-431-55456-1_2 |
2017-01-01 | Mechanical vibrations represent one of the key issues in the development of direct drives with a complex mechanical structure, i.e., with non-stiff connections between motor and driven mechanisms and with variable moments of inertia. A solution for motion control in relation to a direct drive, with highly dynamic perfo... | Selected Methods for a Robust Control of Direct Drive with a Multi-mass Mechanical Load | 10.1007/978-3-319-45735-2_4 |
2017-01-01 | We analyze the deterministic and stochastic components of the realizations of longitudinal vibrations of a rod weakened by a crack determined with the help of numerical solutions of a nonlinear differential equation with stochastic driving force. It is shown that the damping coefficient strongly affects the structure o... | Influence of the Parameters of Damping and Stochastic Loading on the Properties of Longitudinal Vibrations of a Rod with Crack | 10.1007/s11003-017-9993-x |
2017-01-01 | External damping devices For direct damping apparatuses Damping apparatus , base isolation Base isolation , hanging isolation Hanging isolation , dynamic absorber Dynamic absorber and lock-up and shock transmission devices, three types of techniques are available for vibration control: passive, semi-active and active, ... | Control Techniques for External Damping Devices | 10.1007/978-3-642-31854-2_28 |
2017-01-01 | A study into the vibration characteristics of adhesively bonded single-lap joints has been carried out to investigate the effect of joint geometry and temperature variation on overall system damping. Concepts of vibration damping are introduced, and it is shown how to determine the damping of a system. The methodology ... | Vibration Damping of Adhesively Bonded Joints | 10.1007/978-3-319-42087-5_30-2 |
2017-01-01 | We propose a simulation model using viscous damping to predict the moving velocity (v) of a landslide before it reaches a strain limit. We call this model “Lumped mass damper model”, and it is based on a motion equation using a mass system model composed of a damper. The damper introduces a damping force in the opposit... |
Simulation Model to Predict Landslide Speed Using Velocity-Dependent Viscous Damping | 10.1007/978-3-319-53498-5_67 |
2017-01-01 | The dynamic response characteristics of a one-mass-spring-damper system are outlined. The resonant vibration, damping, and natural periods of the dynamic system are explained. Multi-masses-springs-dampers systems for the dynamic response analysis of buildings and other structures, and three methods of solving the diffe... | Dynamic Response Analysis | 10.1007/978-981-10-2516-7_14 |
2017-01-01 | The following formulas and problems are restricted to vibrations of linear systems with one degree of freedom. | Vibrations | 10.1007/978-3-662-53437-3_7 |
2017-01-01 | In order to improve the comfort of passengers in electrical vehicles, it is increasingly important to consider the vibroacoustic behavior of electrical machines during the design phase. In this work, a weakly coupled multiphysical model for electrical machine vibration and noise prediction is presented and applied to a... | Vibrational Model Updating of Electric Motor Stator for Vibration and Noise Prediction | 10.1007/978-3-319-54858-6_28 |
2017-01-01 | Ionic polymer metal composites (IPMCs) are electro-active polymers with excellent electromechanical coupling properties. They are efficient candidates in many advanced technological applications such as actuators, artificial muscles, biomimetic sensors, etc. The manufacturing of electrodes for IPMCs is very critical in... | Ionic Polymer Metal Composites | 10.1007/978-3-662-49514-8_7 |
2017-01-01 | The paper presents analysis of vibration transferred on the car body under different damping properties of suspension. Vehicle must be considered as a multi-technical system in which non-linear phenomena occur. The springing elements in modern cars are coil springs with non-linear characteristics, and the damping eleme... | Vibration Signal Processing for Identification of Relation Between Liquid Volume and Damping Properties in Hydraulic Dampers | 10.1007/978-3-319-51445-1_13 |
2017-01-01 | In 2001, Taylor Devices Inc. developed special Viscous Dampers for use on the Millennium Bridge in London, England. These dampers were specified and designed to be used for mitigating the dynamic response of the bridge due to pedestrian traffic. Prior to the integration of the dampers, the bridge had experienced unacce... | Long-Term Performance of Specialized Fluid Dampers Under Continuous Vibration on a Pedestrian Bridge | 10.1007/978-3-319-54777-0_2 |
2017-01-01 | Understanding of the dynamic properties of municipal solid waste (MSW) and the response of waste landfill for cyclic loads are important for safe seismic design and ensuring sustainability of landfills. This study presents estimation of the dynamic properties through field and laboratory tests of MSW landfill and dynam... | Dynamic Properties of Municipal Solid Waste and Amplification of Landfill Site | 10.1007/978-981-10-4077-1_5 |
2017-01-01 | The rapid growth of energy demand in the recent years mandated exploiting energy resources alternative to the conventional fossil fuel-based resources. Nowadays, the renewable energy resources became a fundamental component of the current power systems. Numerous challenges are induced by these recent bulk systems such ... | Inter-area Oscillation Damping in Power Systems with Deep Penetration of Wind Energy | 10.1007/978-981-10-1721-6_81 |
2017-01-01 | The purpose of this work is the study of the dynamic behavior of sandwich beams with shear damage. The linear vibration method is used in this study. The technique focuses on the response of the material’s resonance modes as a function of the driving amplitude by sweeping the frequency. The sandwich materials used in t... | Characterization of Sandwich Beams with Shear Damage by Linear Vibration Method | 10.1007/978-3-319-41459-1_6 |
2017-01-01 | We rigorously discuss the infrared behavior of the uniform three-dimensional dipolar Bose systems. In particular, it is shown that low-temperature physics of the system is controlled by two parameters, namely isothermal compressibility and intensity of the dipole–dipole interaction. By using a hydrodynamic approach, we... | Infrared Behavior of Dipolar Bose Systems at Low Temperatures | 10.1007/s10909-016-1659-9 |
2017-01-01 | One of the more common forms of passive vibration isolation in mechanical systems has been the use of elastomeric or foam pads. Cellular silicone foam is one such example which has been used for vibration isolation and mitigating the effects of mechanical shock. There are many desirable properties of cellular silicone,... | Empirically-Derived, Constitutive Damping Model for Cellular Silicone | 10.1007/978-3-319-54735-0_8 |
2017-01-01 | This chapter discusses an approximate evaluation Approximate evaluation method to consider the effects of the dynamic characteristics of a bearing on the complex eigenvalues Complex eigenvalues (damping characteristics as the real part and damped natural frequency as the imaginary part). The method consists basically o... | Approximate Evaluation for Eigenvalues of Rotor-Bearing Systems | 10.1007/978-4-431-55456-1_7 |
2017-01-01 | This chapter discusses the discovery of the attenuation peak Attenuation peak in copper Materials (studied) copper (monocrystal) and carbon steels Materials (studied) carbon steels subjected to cyclic tension load and also the nonlinear peaks in carbon steels subjected to rotating-bending fatigue Fatigue rotating bendi... | Remaining-Life Assessment of Fatigued Metals | 10.1007/978-4-431-56036-4_16 |
2017-01-01 | A simple yet reasonably accurate constitutive model of shape memory alloys (SMAs) has been developed. It can treat more than three phases or/and variants and duplicate their rate-dependent deformation behavior quantitatively. This model was applied to damping enhancement analysis. Damping oscillations of cantilever bea... | One-Dimensional Phase Transformation Model and Its Application to Damping Enhancement Analysis | 10.1007/978-3-319-53306-3_2 |
2017-01-01 | After a brief overview of nanoplasmonics experiments that defy explanation with classical electrodynamics, we introduce nonlocal response as a main reason for non-classical effects. This concept is first introduced phenomenologically, and afterwards based on the semi-classical hydrodynamic Drude model (HDM) that indeed... | Nonlocal Response in Plasmonic Nanostructures | 10.1007/978-3-319-45820-5_12 |
2017-01-01 | Classical structural analysis techniques have proven time and time again to be remarkably accurate for systems consisting of a single, continuous piece of material. Unfortunately, nearly all real engineering structures are assembled from multiple parts, joined by bolts, rivets, or other fasteners, and these joints intr... | Effect of Far-Field Structure on Joint Properties | 10.1007/978-3-319-54930-9_7 |
2017-01-01 | A new dynamic particle difference method (PDM) for the simulation of a proportionally damped system subjected to dynamic load and the fracture simulation of cracked concrete beam is presented. The dynamic PDM utilizes only node model without involving any mesh or grid structure to take advantage of the merits of strong... | Dynamic particle difference method for the analysis of proportionally damped system and cracked concrete beam | 10.1007/s10704-016-0150-6 |
2017-01-01 | This chapter discusses an evaluation method for rotor vibration characteristics by utilizing the open-loop frequency response of the system, instead of conventional eigenvalue analysis. The vibration characteristics of a rotor system are represented by the (damped) natural frequency and damping ratio. They have been es... | Rotor System Evaluation Using Open-Loop Characteristics | 10.1007/978-4-431-55456-1_8 |
2017-01-01 | Aiming at the limitation of the traditional flexible robot’s single adjustment stiffness or damping, a magnetorheological (MR) actuator of which stiffness and damping can be adjusted simultaneously and independently is proposed for the robot joint. The principle of equivalent variable stiffness and damping is analyzed ... | Research on Variable Stiffness and Damping Magnetorheological Actuator for Robot Joint | 10.1007/978-3-319-65298-6_11 |
2017-01-01 | This work describes an integrated method of 3D modelling algorithms with a modal approach in a multibody environment which provides a slimmer and more efficient simulation of flexible component contacts realistically reproducing system impacts and vibrations. A non-linear numerical model of the impulse contact forces b... | An effective model for the sliding contact forces in a multibody environment | 10.1007/978-3-319-45781-9_68 |
2017-01-01 | The paper investigates the causes of failure of low pressure steam turbine blade of the last stage and suggests few techniques to overcome the failure causes is presented in this paper. The blade under investigation is made of chrome alloy steel. The fracture occurred at the airfoil region of the blade. The investigati... | Study of corrosive fatigue and life enhancement of low pressure steam turbine blade using friction dampers | 10.1007/s12206-016-1203-5 |
2017-01-01 | Positive Position Feedback (PPF) is a widely used control technique for damping the lightly damped resonant modes of various dynamic systems. Though PPF controller is easy to implement any rigorous mathematical optimization is not possible due to the controller structure. Therefore, almost all PPF designs reported in l... | Selection of Positive Position Feedback Controllers for Damping and Precision Positioning Applications | 10.1007/978-981-10-6463-0_25 |
2017-01-01 | This paper presents a new design of a Lyapunov-redesigned control system for large horizontal wind disturbance rejection on a small-scale unmanned autonomous helicopter (UAH). In this paper, the wind disturbance cannot be treated as small perturbations around the equilibrium state any more. Instead, wind disturbances a... | Wind Disturbance Rejection in Position Control of Unmanned Helicopter by Nonlinear Damping | 10.1007/978-3-319-68345-4_52 |
2017-01-01 | Mitigation and analysis of very fast transient over voltages (VFTO) is very important in gas-insulated substations (GIS). In this paper a power transformer rating of 1500 MVA in 1000 kV GIS has been considered and different techniques for mitigation and analysis of VFTOs at the transformer are applied and the same resu... | Mitigation and Analysis of Very Fast Transient over Voltages (VFTOs) of Transformer in 1000 KV Gas-Insulated Substation (GIS) Using Wavelet Transform | 10.1007/978-981-10-1708-7_8 |
2017-01-01 | In this chapter the dynamic problems for piezoelectric nanosized bodies with account for coupled damping and surface effects are considered. For these problems we propose new mathematical model which generalizes the models of the elastic medium with damping in sense of the Rayleigh approach and with surface effects for... | Mathematical Models and Finite Element Approaches for Nanosized Piezoelectric Bodies with Uncoulped and Coupled Surface Effects | 10.1007/978-981-10-3797-9_1 |
2017-01-01 | High damping rubber bearings have been used in the seismic isolation of buildings worldwide for almost 30 years now. After a brief introduction to the process leading to their manufacturing, a description is given of the main tests required by current seismic codes for the design of such devices. An extensive review is... | Modeling of High Damping Rubber Bearings | 10.1007/978-3-319-56136-3_7 |
2017-01-01 | Structures of ancient Mediterranean cultures that have survived numerous earthquakes over the span of millennia relied on multifaceted rocking columns to dissipate seismic energy. Rocking columns are again emerging as an effective mechanism in modern structural systems; understanding the rocking behavior can provide in... | Analytical and Experimental Analysis of Rocking Columns Subject to Seismic Excitation | 10.1007/978-3-319-54777-0_10 |
2017-01-01 | Spherical friction pendulums (FP) represent the common approach to isolate civil engineering structures against earthquake excitation. As these devices are passive and friction damping is nonlinear the optimal friction coefficient for minimum absolute acceleration of the building depends on the peak ground acceleration... | Semi-Active Base Isolation of Civil Engineering Structures Based on Optimal Viscous Damping and Zero Dynamic Stiffness | 10.1007/978-3-319-54777-0_1 |
2017-01-01 | This paper presents ride comfort and road holding analysis of passive and semi-active suspension system using quarter car model. Semi-active suspension system with magnetorheological (MR) damper was modeled as non-parametric model-based magnetic flux density in the fluid flow gap. The skyhook control strategy was used ... | Vertical dynamic analysis of a quarter car suspension system with MR damper | 10.1007/s40430-015-0481-7 |
2017-01-01 | In this paper, the feasibility of using the finite element analysis method to predict the shelf life of the tea moisture proof package is studied. The finite element software was used to construct the diffusion model, with the aid of the finite element software heat conduction module, and the suitable conductivity coef... | Finite Element Analysis of Moisture Diffusion in Damp-Proof Packing | 10.1007/978-981-10-3530-2_76 |
2017-01-01 | In this study, simplified numerical models are developed to analyze the soil-structure interaction (SSI) effect on frame structures equipped with viscoelastic dampers (VEDs) based on pile group foundation. First, a single degree-of-freedom (SDOF) oscillator is successfully utilized to replace the SDOF energy dissipated... | Simplified analysis of frame structures with viscoelastic dampers considering the effect of soil-structure interaction | 10.1007/s11803-017-0377-x |
2017-01-01 | The magneto-rheological (MR) dampers used in automotive suspension improve the energy dissipation capacity for the vertical oscillations of the car body and wheel of the vehicle by increasing the damping force developed by piston motion. The determining of the time constant of the magneto-rheological fluid is essential... | Experimental Researches on the Magneto-Rheological Dampers Response to the Control Parameters | 10.1007/978-3-319-45447-4_28 |
2017-01-01 | The paper fills the gap in studying acoustic manifestations of a gas inclusion near an interface and makes it possible to analytically describe the behavior of a bubble at a small (comparable with its size) distance from the boundary. It is shown that the use of a specific (bispherical) coordinate system allows separat... | Oscillations of a gas inclusion near an interface | 10.1134/S1063771016060099 |
2017-01-01 | In order to study damping characteristic and its influencing factors of E glass fiber/polyurethane composite leaf spring, we use finite element simulation method. Give a detailed research method of it: According to the structure semesters of the spring, building 3D models of composite laminate and spring and carrying o... | Damping Analysis and Test Research of a Composite Leaf Spring in a Light Bus | 10.1007/978-981-10-3527-2_29 |
2017-01-01 | To reduce lateral vibrations of rotating machines, the damping devices are placed between the rotor and its frame. This is enabled by magnetorheological squeeze film dampers. To achieve their optimum performance their damping effect must be adaptable to the current working conditions. In this paper, modelling of the ma... | Multi-physical Analysis of the Forces in the Flexible Rotor Supported by the Magnetorheological Squeeze Film Dampers | 10.1007/978-3-319-44087-3_12 |
2017-01-01 | High cycle fatigue (HCF) caused by large resonant stresses is a common cause for turbine blades failure. Passive damping systems, such as friction dampers are often used by aero-engine manufacturers to reduce the resonant stresses and mitigate the risk of HCF. The presence of friction dampers makes the dynamics of the ... | DIC Measurement of the Kinematics of a Friction Damper for Turbine Applications | 10.1007/978-3-319-54930-9_9 |
2017-01-01 | Vehicle suspension systems are usually based on passive actuators and control modes in which the damping and stiffness parameters are predefined and kept constant for all road profiles and vehicle response. A different approach is to use active systems to monitor and control the suspension motion in order to improve th... | Fuzzy Based Control of a Vehicle Suspension System Using a MR Damper | 10.1007/978-3-319-43671-5_48 |
2017-01-01 | Dampers are frequently used for vibration reduction and isolation. While passive dampers are still being used, semi-active dampers such as MR and ER dampers have found their ways to expensive commercial applications. They use magnetorheological (MR) or electrorheological (ER) fluids as the damper fluid, subjected to a ... | Application of Nonlinear Displacement-Dependent Dampers in Suspension Systems | 10.1007/978-3-319-54404-5_17 |
2017-01-01 | Random motions on the line and on the plane with space-varying velocities are considered and analyzed in this paper. On the line we investigate symmetric and asymmetric telegraph processes with space-dependent velocities and we are able to present the explicit distribution of the position $$\mathcal {T}(t)$$ T ( t ) , ... | Random Motions with Space-Varying Velocities | 10.1007/978-3-319-65313-6_2 |
2017-01-01 | Carrier tracking phase lock loop (PLL) applied extensively in GNSS receivers and high-precision time transfer systems. The PLL is one of the important structures for carrier phase tracking in receivers. Generally, carrier phase noise can be degraded by local frequency references. However, this modification induces phas... | Optimal Carrier Tracking PLL in the Presence of Phase Noise in GNSS Receiver | 10.1007/978-981-10-4588-2_80 |
2017-01-01 | The paper presents an approach to dumping of the pendulum during dynamic stabilization in an arbitrary angle. The rapid oscillations of the pendulum’s suspension point cause that created effective potential has a local minimum which guarantees the stability of the pendulum. The external disturbances bring an additional... | Damping of the pendulum during dynamic stabilization in arbitrary angle position | 10.1007/978-3-319-60699-6_6 |
2017-01-01 | The Bergsøysund Bridge is currently being extensively monitored with accelerometers, anemometers, wave radars and GNSS sensors. By applying Covariance-driven Stochastic Subspace Identification (Cov-SSI), the modal parameters of the bridge are estimated. The results are interpreted in the context of the environment, rep... | Covariance-Driven Stochastic Subspace Identification of an End-Supported Pontoon Bridge Under Varying Environmental Conditions | 10.1007/978-3-319-54777-0_14 |
2017-01-01 | This work describes a novel method for measuring the damping, the elastic modulus and the non-linear behavior of high strength low damping fiber materials such as para-aramids, silicon carbide (SiC) and carbon. The method is based on resonant response characterization of a spring-mass system excited by a sine-wave forc... | A New Testing Machine for the Dynamic Characterization of High Strength Low Damping Fiber Materials | 10.1007/s11340-016-0208-4 |
2017-01-01 | This study proposes to use the non-linear properties of the support bearing viscoelastic material for damping of resonance oscillations of a vertical unbalanced gyroscopic rotor. To this end, it analyzes in detail the impact of non-linear damping and non-linear elastic characteristics of the support bearing material on... | Dynamics of a Vertical Unbalanced Gyroscopic Rotor with Nonlinear Characteristics | 10.1007/978-3-319-45450-4_11 |
2017-01-01 | In this paper, a damped harmonic oscillator with multiple delays is investigated. The existence conditions under which the origin of the system is a Bogdanov–Takens (B–T) singularity are derived. By utilizing the center manifold reduction and choosing suitable bifurcation parameters, the second- and the third-order nor... | Bogdanov–Takens bifurcation in an oscillator with positive damping and multiple delays | 10.1007/s11071-016-3040-6 |
2017-01-01 | This research compares spatial damping identification methods, both theoretically and experimentally. In contrast to the commonly used damping methods (modal, proportional) the spatial damping information improves structural models with a known location of the damping sources. The real case robustness of full FRF matri... | Frequency Based Spatial Damping Identification—Theoretical and Experimental Comparison | 10.1007/978-3-319-54735-0_3 |
2017-01-01 | Machining vibrations and dynamic instability of machine tools is an important consideration in machining systems. Common approaches for improving their dynamic performance target either the process, or intelligent, yet complex control systems with actuators. Given that machine tools’ dynamic characteristics are largely... | Development and analysis of a consciously designed Joint Interface Module for improvement of a machining system’s dynamic performance | 10.1007/s00170-016-8781-3 |
2017-01-01 | Energy dissipation devices are widely utilized to improve the response of structures subjected to dynamic loadings (e.g. earthquakes, winds). In particular, viscous dampers are hydraulic devices widely employed in structural engineering that dissipate the kinetic energy by producing a damping force against the motion. ... | Reliability-Based Methodology for the Optimal Design of Viscous Dampers | 10.1007/978-3-319-47886-9_29 |
2017-01-01 | Tail Drive Shaft of a helicopter transmits torque from the main gear box to the tail rotor and in most of the helicopter designs, tail shafts are designed to work in supercritical speeds. In order to limit resonance vibrations of the tail drive shaft, dry friction dampers can be used. Therefore, in order to study the e... | Effect of Dry Friction Damping on the Dynamic Response of Helicopter Tail Shaft | 10.1007/978-3-319-54648-3_3 |
2017-01-01 | This paper describes the application of a Brain Emotional Learning (BEL) controller to improve the response of a SDOF structural system under an earthquake excitation using a magnetorheological (MR) damper. The main goal is to study the performance of a BEL based semi-active control system to generate the control signa... | Brain Emotional Learning Based Control of a SDOF Structural System with a MR Damper | 10.1007/978-3-319-43671-5_46 |
2017-01-01 | In this paper we investigate the implementation of the so-called freezing method for second order wave equations in one and several space dimensions. The method converts the given PDE into a partial differential algebraic equation which is then solved numerically. The reformulation aims at separating the motion of a so... | Freezing Traveling and Rotating Waves in Second Order Evolution Equations | 10.1007/978-3-319-64173-7_14 |
2017-01-01 | In this chapter, seismic vulnerability of smart structures is assessed using fragility analysis framework. The fragility analysis framework is effective to evaluate the performance and the vulnerability of structures under a variety of earthquake loads. To demonstrate the effectiveness of the seismic fragility analysis... | Seismic Fragility Analysis of Faulty Smart Structures | 10.1007/978-3-319-47798-5_11 |
2017-01-01 | The problem of improving driving safety for vehicles equipped with magnetorheological (MR) dampers is considered. It is proposed to control the MR dampers using the clipped LQ (Linear Quadratic) control which can be regarded as the two-dimensional Skyhook algorithm. The strategy is applied to a half-car model with four... | The clipped LQ control oriented on driving safety of a half-car model with magnetorheological dampers | 10.1007/978-3-319-60699-6_21 |
2017-01-01 | The number of electronic components in modern vehicle chassis systems has been increasing, and energy harvesting systems are one of the main parts. Energy harvesting dampers have been developed to improve the energy efficiency, and in this paper, a ball-screw type energy harvesting damper system is modeled, and the dyn... | Vehicle Dynamic Analysis for the Ball-Screw Type Energy Harvesting Damper System | 10.1007/978-3-319-50904-4_86 |
2017-01-01 | Tuned mass dampers (TMDs) used in seismic vibration control are positioned on the top of the structures and it is the optimum position for regular structures. For structure with different stiffness values for each story, the optimum place of a TMD may be different. In this study, the story position of TMD is also inclu... | Tuning and Position Optimization of Mass Dampers for Seismic Structures | 10.1007/978-981-10-3728-3_23 |
2017-01-01 | In this study, a new approach is proposed for optimization of tuned mass damper positioned on the top of seismic structures. The usage of metaheuristic algorithms is a well-known and effective technique for optimum tuning of parameters such as mass, period and damping ratio. The aim of the study is to generate a new me... | Optimum Tuning of Mass Dampers by Using a Hybrid Method Using Harmony Search and Flower Pollination Algorithm | 10.1007/978-981-10-3728-3_22 |
2016-12-08 | We study the asymptotic properties of the solutions of a class of even-order damped differential equations with p -Laplacian like operators, delayed and advanced arguments. We present new theorems that improve and complement related contributions reported in the literature. Several examples are provided to illustrate t... | Asymptotic behavior of even-order damped differential equations with p-Laplacian like operators and deviating arguments | 10.1186/s13660-016-1246-2 |
2016-12-01 | The approach of the phenomenological universalities of growth is considered to describe the behaviour of a system showing an oscillatory growth. Two phenomenological classes are proposed to consider the oscillatory behaviour of a system. One of them is showing oscillatory nature with constant amplitude and the other re... | Phenomenological approach to describe oscillatory growth or decay in different dynamical systems | 10.1007/s12648-016-0884-z |
2016-12-01 | Tibetan heritage buildings have a high historical and cultural value. They have endured adverse environmental loadings over hundreds of years without significant damage. However, there are few reports on their structural characteristics under normal environmental loadings and their behavior under dynamic loadings. In t... | Modal parameter identification and damping ratio estimation from the full-scale measurements of a typical Tibetan wooden structure | 10.1007/s11803-016-0358-5 |
2016-12-01 | We have observed and quantified the adiabatic and transient chirp in a directly modulated laser. The wavelength excursion for both chirp terms is well characterized by the phase rate equation model that describes the chirp behavior. In this study, the effect of gain compression and linewidth enhancement factor, below a... | Effect of gain compression above and below threshold on the chirp characteristics of 1.55 µm distributed feedback laser | 10.1007/s10043-016-0268-9 |
2016-12-01 | In recent years, a number of researches into dynamic characteristics of the noise and vibration in the railway have been performed. Since the high frequency vibration, which occurs in the irregularity(roughness) of the wheel and rail running surfaces, causes the track noise in railway system, analytic study with measur... | Effect of linearized contact spring in track dynamic system | 10.1007/s13296-016-0077-9 |
2016-12-01 | The best known model for numerically simulating the hysteretic behavior of various structural components is the bilinear hysteretic system. There are two possible mechanical formulations that correspond to the same bilinear model from a mathematical viewpoint. The first one consists of a linear elastic spring connected... | Mechanical formulations for bilinear and trilinear hysteretic models used in base isolators | 10.1007/s10518-016-0014-5 |
2016-12-01 | Dampers are used to control response of structure in recent years. Seismic response is reduced by adding energy dissipation capacity to the building. Dampers are provided to dissipate energy to reduce the damages on buildings. Relative displacement of two floors are opposed by damper elements. Dampers dissipate energy ... | Inelastic Seismic Response of Building with Friction Damper | 10.1007/s40030-016-0184-9 |
2016-12-01 | Wave propagation in damped elbow pipes is investigated with the Fourier–Legendre spectral element method. The damped steady-state dispersion relationship is constructed by the frequency–wavenumber spectral decomposition of the governing wave equation, based on the strain–displacement relation of the ring coordinate. Th... | Numerical modeling of wave propagation for damped elbow pipes using Fourier–Legendre spectral element method in polar coordinates | 10.1007/s00419-016-1164-2 |
2016-12-01 | Raising the structural seismic-resistant capability by ductility design and structural control to alleviate the structural response to earthquake are two main concepts of modern structural design. Ductile designed building is subjected to nonlinear status to dissipate energy, thus eliminating the crisis caused by reson... | Development and Laboratory Confirmation of Innovative Self-Reliance Controller | 10.1007/s13369-016-2219-y |
2016-12-01 | The research on the form and control method of impact load arresting buffer has been an active topic in the field of buffer arresting system (BAS). It becomes significant on reducing the weight of arresting system, improving the hindered efficiency, and guaranteeing the security of BAS. The hydraulic hindered device of... | Impact arresting process mechanical modeling and sliding model buffer control based on magneto-rheological fluid | 10.1007/s12204-016-1782-4 |
2016-12-01 | Mitochondria and mitochondrial debris are found in the brain’s extracellular space, and extracellular mitochondrial components can act as damage associated molecular pattern (DAMP) molecules. To characterize the effects of potential mitochondrial DAMP molecules on neuroinflammation, we injected either isolated mitochon... | Extracellular Mitochondria and Mitochondrial Components Act as Damage-Associated Molecular Pattern Molecules in the Mouse Brain | 10.1007/s11481-016-9704-7 |
2016-12-01 | Due to migration of people to urban area, high land costs and use of light weight materials modern buildings tend to be taller, lighter and flexible. These buildings possess low damping. This increases the possibility of failure during earthquake ground motion and also affect the serviceability during wind vibrations. ... | Evaluation of Sloped Bottom Tuned Liquid Damper for Reduction of Seismic Response of Tall Buildings | 10.1007/s40030-016-0185-8 |
2016-12-01 | Semi-active control is based on the use of the emerging concept of active control and passive control. The developed accumulator semi-active hydraulic damper (ASHD) is converted to interaction element (IE) of active interaction control (AIC). Systemic equations of motion, control law and control rulers of this proposed... | Shaking table test and verification of development of an accumulated semi-active hydraulic damper as an active interaction control device | 10.1007/s12046-016-0570-z |
2016-12-01 | Magnetorheological (MR) dampers are devices that can be used for structural vibration reduction under seismic excitation. These devices are used in semi-active control which require less power compared to active devices and offer high reliability compared to passive devices. Despite the advantages of MR damper, use of ... | Parameter Identification of Long Stroke and Short Stroke MR Damper for its Use in Semi-Active Vibration Control | 10.1007/s40030-016-0182-y |
2016-11-12 | A theoretical model is developed to analyze oil-film stiffness and damping coefficients of SGRSs using two different cavitation models, i.e., the Reynolds and JFO boundary conditions. By applying the small perturbation method, the steady and perturbed Reynolds equations could be obtained. The control volume method was ... | Theoretical and Experimental Study of Cavitation Effects on the Dynamic Characteristic of Spiral-Groove Rotary Seals (SGRSs) | 10.1007/s11249-016-0784-6 |
2016-11-01 | The authors investigate the global existence and asymptotic behavior of classical solutions to the 3D non-isentropic compressible Euler equations with damping on a bounded domain with slip boundary condition. The global existence and uniqueness of classical solutions are obtained when the initial data are near an equil... | The 3D non-isentropic compressible Euler equations with damping in a bounded domain | 10.1007/s11401-016-1039-4 |
2016-11-01 | This is an exploration of dynamic tides on elastic bodies. The body is thought of as a dynamical system described by its modes of oscillation. The dynamics of these modes are governed by differential equations that depend on the rheology. The modes are damped by dissipation. Tidal friction occurs as exterior bodies exc... | Dynamic Elastic Tides | 10.1007/s10569-016-9682-3 |
2016-11-01 | Internal damping process in a ribbon of NiTi shape memory alloy (NiTi SMA) during a reverse transformation, from low temperature phase (martensite) to high temperature phase (austenite), has been studied by dynamic mechanical analysis (DMA) and using fractional calculus for the experimental data analysis. A mechanical ... | Application of fractional calculus to modeling the dynamic mechanical analysis of a NiTi SMA ribbon | 10.1007/s10973-016-5552-1 |
2016-11-01 | In this work, the thermoelastic damping of a nano-scale resonator is analyzed by the generalized thermoelasticity theory based on two-temperature model (2TLS). The effect of two-temperature parameter and relaxation time in nano-scale resonator are investigated for beams under clamped conditions. Analytical expressions ... | A two-temperature model for evaluation of thermoelastic damping in the vibration of a nanoscale resonators | 10.1007/s11043-016-9309-9 |
2016-11-01 | The movement of a tubular manometric spring that experiences oscillations in the plane of curvature of the central axis in a viscous medium is investigated. The Manometr software package for automatic calculation of the damping parameters is developed. Experimental estimation of the reliability of the results obtained ... | Theoretical Foundations of the Design of Vibration-Resistant Manometers | 10.1007/s11018-016-1055-5 |
2016-11-01 | Aim of the paper is to propose a new approach for the determination of the so termed self-damping, or internal damping, of metallic cables. The formulation is developed starting from a recent mechanical model of a strand, from which the hysteretic bending behavior of stranded cables is derived. Each wire of the cable i... | A new approach to the definition of self-damping for stranded cables | 10.1007/s11012-016-0444-9 |
2016-11-01 | Many physical phenomena might be modeled with the well-known Mathieu equation. Engineering applications, such as wind turbine blade dynamics, and helicopter rotor dynamics, lead to equations of motions with frequency-dependent coefficients. In such applications, the rotations cause the periodic parametric excitations. ... | Stochastic stability of the non-homogeneous damped Mathieu equation | 10.1007/s11071-016-2977-9 |
2016-11-01 | A hardware and software system for studying the damping and elastic properties of soft materials in a low-frequency range of deformation up to 100 Hz, which most fully corresponds to the range of dynamic actions in actual service conditions of structures, is proposed. A novel identification method for evaluating the el... | Theoretical-Experimental Method for Evaluating the Elastic and Damping Characteristics of Soft Materials Based on Studying the Resonance Flexural Vibrations of Test Specimens | 10.1007/s11029-016-9608-x |
2016-11-01 | A subcritical or supercritical rotor is often employed to improve the energy storage efficiency of flywheel systems. Consequently, it is necessary to introduce Squeeze film dampers (SFD) in the rotor-bearing system to suppress the lateral vibration of the rotor. Although the dynamic behavior of the rotor-bearing system... | Dynamic analysis for the energy storage flywheel system | 10.1007/s12206-016-1001-0 |
2016-11-01 | Extensive investigations were conducted in (Brameshuber et al., Standsicherheit horizontal belasteter Mauerwerkwände unter geringer Auflast, 2014 ) to analyse the load bearing and deformation behaviour especially of lightly loaded basement walls made of hollow clay units under out-of-plane shear load. Particular attent... | Lightweight masonry basement walls under out-of-plane loading | 10.1617/s11527-016-0805-9 |
2016-11-01 | Entropic uncertainty relation (EUR) quantifies the precision of measurements for arbitrary two non-commuting observables within a specified system. Due to exposure in a noisy environment, a practical system unavoidably suffers from decay by interacting with the environment. Inthis paper, we investigate the dynamic beha... | Entropic Uncertainty Relation Under Dissipative Environments and Its Steering by Local Non-unitary Operations | 10.1007/s10773-016-3085-9 |
2016-11-01 | Many works have been focused on the use of the base isolation to improve the dynamic response of the rigid blocks, avoiding the overturning of these systems. In this paper the effects of a mass damper on the rocking motion of a non-symmetric rigid block, subject to one-sine pulse type excitation, is investigated. The d... | On the use of a pendulum as mass damper to control the rocking motion of a rigid block with fixed characteristics | 10.1007/s11012-016-0448-5 |
2016-11-01 | In this paper, a comprehensive review of the present literature on energy generated magnetorheological (MR) fluid based damper, modeling and applications of the MR damper are presented. The review starts with an introduction of the basic of MR fluid and their different modes, consequences with different types of MR flu... | Advancement in energy harvesting magneto-rheological fluid damper: A review | 10.1007/s13367-016-0035-2 |
2016-11-01 | This paper introduces a new type of tuned liquid damper (TLD) having a relatively simple, easy-to-model behavior and high effectiveness in controlling structural vibrations. It consists of a traditional TLD with addition of a floating roof. Since the roof is much stiffer than water, it prevents wave breaking, hence mak... | Modeling and experimental validation of a new type of tuned liquid damper | 10.1007/s00707-015-1536-7 |
2016-10-27 | Accurate determination of squeeze-film damping (SFD) plays an important role in the design of high- Q microresonators. Many analytical models for predicting SFD on the microplate vibrating in a tilting motion have been well established in the past. However, most of the previous works focused on the rectangular torsion ... | Squeeze-film damping of circular microplates vibrating in a tilting motion | 10.1007/s10404-016-1816-0 |
2016-10-01 | The simple constant hysteretic damping model is known to be non-causal although it is used often in diverse branches of engineering. In this paper the response of a single degree of freedom oscillator having linear hysteretic damping under arbitrary force excitation has been studied after deriving the impulse response ... | On Response of a Single-Degree-of-Freedom Oscillator with Constant Hysteretic Damping Under Arbitrary Excitation | 10.1007/s40032-016-0249-6 |
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