publicationDate stringlengths 10 10 | abstract stringlengths 0 37.3k | title stringlengths 1 5.74k | doi stringlengths 11 47 ⌀ |
|---|---|---|---|
2020-10-22 | In this paper, we consider the Cauchy problem for a generalized Boussinesq equation with double damping terms. By using improved convexity method combined with potential well method and Fourier transform, we show the finite time blow-up of the solution with arbitrarily high initial energy while many similar results req... | Blow-up for Generalized Boussinesq Equation with Double Damping Terms | 10.1007/s00009-020-01604-5 |
2020-10-19 | We consider the initial boundary value problem in exterior domain for strongly damped wave equations with power-type nonlinearity $$|u|^p$$ | u | p . We will establish blow-up results under some conditions on the initial data and the exponent p , using the method of test function with an appropriate harmonic functions.... | Finite Time Blow-Up for Wave Equations with Strong Damping in an Exterior Domain | 10.1007/s00009-020-01607-2 |
2020-10-17 | The paper presents a case study of a small off-road vehicle and its response to ground excitations regarding the geometrical suspension properties and the variation of adjustable damping parameters, that can change restoring force in fast bump, slow bump and rebound zones. The shock absorber behaviour in force–velocity... | Assessment of adjustable damping in the ride comfort of a baja SAE vehicle | 10.1007/s40430-020-02660-4 |
2020-10-17 | A priori bounds constitute a crucial and powerful tool in the investigation of initial boundary value problems for linear and nonlinear fractional and integer order differential equations in bounded domains. We present herein a collection of a priori estimates of the solution for an initial boundary value problem for a... | A priori bounds of the solution of a one point IBVP for a singular fractional evolution equation | 10.1186/s13662-020-03049-2 |
2020-10-06 | The aim of this work is to improve the oscillation results for second-order neutral differential equations with damping term. We consider the noncanonical case which always leads to two independent conditions for oscillation. We are working to improve related results by simplifying the conditions, based on taking a dif... | Amended oscillation criteria for second-order neutral differential equations with damping term | 10.1186/s13662-020-03013-0 |
2020-10-05 | Machine foundations are generally affected by the vibratory shocks from different machines. The behavior of these foundations is influenced by the properties of underlying soil and the excitation frequency of the applied dynamic load. The influence of material damping on the dynamic impedance functions of a circular di... | Effect of material damping on the impedance functions of an embedded circular foundation under vertical and horizontal excitation | 10.1007/s41062-020-00370-3 |
2020-10-01 | In this paper we prove that every compact invariant subset $$\mathscr{A}$$ associated with the semigroup S _ n,k ( t )_ t ≥0 generated by wave equations with variable damping, either in the interior or on the boundary of the domain where Ω ⊂ ℝ^3 is a smooth bounded domain, in H _0 ^1 (Ω) × L ^2(Ω) is in fact bounded in... | Regularity of Invariant Sets in Variable Internal Damped Wave Equations | 10.1007/s10255-020-0978-4 |
2020-10-01 | Aiming at the problem of global climate change and energy crisis, wind power has become the focus of energy sustainable development in all countries. The wind turbines (WTs) power system is connected to the grid via the power electronic converter, causing the system inertia level to drop. In this paper, the direct-driv... | Modeling and mechanism analysis of inertia and damping issues for wind turbines PMSG grid-connected system | 10.1007/s00500-020-04897-6 |
2020-10-01 | Based on the Hamilton’s principle, a nonlinear mathematical model of the cantilever-type piezoelectric energy harvester with a tip mass is systematically derived under parametric and external excitations. The proposed model accounts for geometric and electro-mechanical coupling nonlinearities, damping nonlinearity and ... | Performance analysis of piezoelectric energy harvesters with a tip mass and nonlinearities of geometry and damping under parametric and external excitations | 10.1007/s00419-020-01721-3 |
2020-10-01 | Purpose A randomly excited spring–damper–mass system placed on a uniformly moving belt is investigated with the consideration of the Coulomb friction between the system and the belt. The system response is analytically studied. The physical essence of friction and the influences of the belt speed, the friction amplitud... | Random Response of Spring–Damper–Mass–Belt System with Coulomb Friction | 10.1007/s42417-019-00168-3 |
2020-10-01 | Abstract The paper presents a generalization of the conventional analytical approach where the quasi-steady theory is utilised to evaluate the across-wind aerodynamic damping of slender single beam structures. This generalized theory considers the variation of structural and aerodynamic parameters along the structural ... | Predicted aerodynamic damping of slender single beam structures in across-wind vibrations | 10.1007/s10409-020-00981-0 |
2020-10-01 | In this paper, the Discrete Sources Method has been extended to describe the influence of the geometry asymmetry of a core-shell particle accounting for the effect of spatial dispersion inside the plasmonic metal shell. We found that varying the plasmonic shell thickness has more influence on the near field intensity d... | Discrete Sources Method for Investigation of the Influence of Geometry Asymmetry of Core-Shell Particles Accounting For Spatial Dispersion | 10.1007/s10598-021-09506-1 |
2020-10-01 | Abstract — The structural state of iodide titanium after deformation by drawing at 77 K, which is the final stage of severe plastic deformation (SPD), has been analyzed and estimated in this work. The SPD has been implemented by a sequential combination of deformation techniques (compression-squirting-extrusion-drawing... | Analysis of the Structural State Formed in Titanium at the Final Severe Plastic Deformation Stage | 10.1134/S0031918X20090100 |
2020-10-01 | In this study, we develop an analytical formula to approximate the damping coefficient as a function of the coefficient of restitution for a class of continuous contact models. The contact force is generated by a logical point-to-point force element consisting of a linear damper connected in parallel to a spring with H... | Optimal damping coefficient for a class of continuous contact models | 10.1007/s11044-020-09745-x |
2020-10-01 | Abstract This study is a continuation of the article “Formulation and solution of a generalized Chebyshev problem: First Part,” in which a generalized Chebyshev problem was formulated and two theories of motion for nonholonomic systems with higher order constraints were presented for its solution. These theories were u... | Formulation and Solution of a Generalized Chebyshev Problem: Second Part | 10.1134/S1063454120040111 |
2020-10-01 | In this paper, it is proposed a quantization procedure for the one-dimensional harmonic oscillator with time-dependent frequency, time-dependent driven force, and time-dependent dissipative term. The method is based on the construction of dynamical invariants previously proposed by the authors, in which fundamental imp... | Dynamical Invariants and Quantization of the One-Dimensional Time-Dependent, Damped, and Driven Harmonic Oscillator | 10.1007/s13538-020-00765-8 |
2020-10-01 | Damping ratio is an important and central parameter for the dynamic analysis of structures. The present study focuses on the estimation of the equivalent damping ratio in a post-yield region for RC frames, both with and without infills. One-story one-bay RC frames casted non-integrally with fly ash (FA) bricks and auto... | Post-yield Damping Ratio Estimation Studies for Masonry-Infilled Reinforced Concrete Frames | 10.1007/s40996-019-00342-3 |
2020-10-01 | This study proposes a new method toward optimizing the design of non-conventional tuned mass dampers in multi-degree-of-freedom systems. An important application of the proposed method is in mega-sub-controlled structures in which the seismic vibration of the system is controlled by using isolated sub-structures. The m... | Toward Optimizing Dynamic Characteristics of Non-conventional TMDs in Multi-degree-of-Freedom Systems | 10.1007/s40996-019-00338-z |
2020-10-01 | In this paper we consider the situation that three identical two-level atoms resonantly interact with three distant single-mode optical cavities via a one-photon hopping separately, and there exist the phenomena of atom-decay and cavity-decay. Under Jaynes-Cummings model the time evolution of the system is given. The t... | Tripartite Entanglement Dynamics in the System Consisting of Three Damping Jaynes-Cummings Models | 10.1007/s10773-020-04574-2 |
2020-10-01 | A numerical model is proposed for analyzing the effects of added mass and damping on the dynamic behaviors of hydrofoils. Strongly coupled fluid-structure interactions (FSIs) of hydrofoils are analyzed by using the 3-D panel method for the fluid and the finite element method for the hydrofoils. The added mass and dampi... | Numerical analysis of added mass and damping of elastic hydrofoils | 10.1007/s42241-020-0066-5 |
2020-10-01 | Amyotrophic lateral sclerosis (ALS) is a fatal and rapidly progressing motor neuron degenerative disease that is without effective treatment. The receptor for advanced glycation end products (RAGE) is a major component of the innate immune system that has been implicated in ALS pathogenesis. However, the contribution o... | Absence of Receptor for Advanced Glycation End Product (RAGE) Reduces Inflammation and Extends Survival in the hSOD1^G93A Mouse Model of Amyotrophic Lateral Sclerosis | 10.1007/s12035-020-02019-9 |
2020-09-28 | In this paper, we consider large time behaviour of solutions to the 3D Navier–Stokes equations with damping term $$|u|^{\beta -1}u$$ | u | β - 1 u ( $$\beta \ge 1$$ β ≥ 1 ). For $$\beta >\frac{7}{3}$$ β > 7 3 , we derive decay rates of the $$L^2$$ L 2 -norm of the solutions. By using Fourier splitting method, we also p... | Large time behaviour of solutions to the 3D Navier–Stokes equations with damping | 10.1007/s00033-020-01404-7 |
2020-09-16 | We are interested in studying a system coupling the compressible Navier–Stokes equations with an elastic structure located at the boundary of the fluid domain. Initially the fluid domain is rectangular and the beam is located on the upper side of the rectangle. The elastic structure is modeled by an Euler–Bernoulli dam... | Local Existence of Strong Solutions of a Fluid–Structure Interaction Model | 10.1007/s00021-020-00520-8 |
2020-09-11 | In this study, power capture performance of a heaving wave energy converter has been optimized by investigating the effect of variation of power take-off damping. The wave energy converter model used in this study utilizes the sliding discrete Fourier transform technique to estimate the local wave frequency. The power ... | Power capture performance of a heaving wave energy converter for varying b_rad/b_pto ratio | 10.1007/s42452-020-03230-y |
2020-09-08 | The waste of olive pomace (OP) particle filler was incorporated with glass fiber-reinforced composites (GFRP)/epoxy resin to manufacture OP particles-modified GFRP composites. Different weight ratios (0.5, 1, 2, 5, 10, and 15 wt%) of OP particles were incorporated within the common matrix of epoxy resin to investigate ... | An experimental investigation on dynamic and mechanical characterization of olive pomace-filled glass/epoxy composite laminates | 10.1007/s40430-020-02592-z |
2020-09-02 | In this paper, we study the initial boundary value problem for a Petrovsky type equation with a memory term, a linear weak damping and superlinear source. Finite time blow-up results have been obtained for the case in which the initial energy $$E(0)\le M$$ E ( 0 ) ≤ M , where M is a positive constant. By utilizing Levi... | Finite time blow-up for a nonlinear viscoelastic Petrovsky equation with high initial energy | 10.1007/s42985-020-00031-1 |
2020-09-01 | The investigation of soil response to dynamic loads is necessary to predict site-specific seismic hazard. This paper presents the results of cyclic and dynamic laboratory tests carried out after the 2016–2017 Central Italy Earthquake sequence, within the framework of the seismic microzonation studies of the most damage... | Dynamic characterization of fine-grained soils in Central Italy by laboratory testing | 10.1007/s10518-019-00611-6 |
2020-09-01 | The purpose of this work is to investigate the stabilization of a system of weakly coupled wave equations with one or two locally internal Kelvin–Voigt damping and non-smooth coefficient at the interface. The main novelty in this paper is that the considered system is a coupled system and that the geometrical situation... | A transmission problem of a system of weakly coupled wave equations with Kelvin–Voigt dampings and non-smooth coefficient at the interface | 10.1007/s40324-020-00218-x |
2020-09-01 | This paper is concerned with well-posedness and long-time dynamics for a class extensible beams with nonlocal Balakrishnan–Taylor and frictional damping. The related model describes vibrations in nonlinear extensible beams arising in connection with models of oscillation in pipes and supersonic panel flutter. Our main ... | Long-Time Dynamics of Balakrishnan–Taylor Extensible Beams | 10.1007/s10884-019-09766-x |
2020-09-01 | Deployable/retractable damped cantilever beams are a class of time-varying parametric structures which have attracted considerable research interest due to their many potential applications in the intelligent robot field and aerospace. In the present work, the dynamic characteristics of a deployable/retractable damped ... | Dynamic analysis of a deployable/retractable damped cantilever beam | 10.1007/s10483-020-2650-6 |
2020-09-01 | Gyeongju bentonite is a Ca-bentonite and a highly compacted buffer material primarily considered in Korea, as a part of an engineered barrier system (EBS) of high-level radioactive waste (HLW) repository. During the repository lifetime, the buffer material should guarantee the safe disposal of HLW against any external ... | Experimental Investigation on Small-Strain Dynamic Properties and Unconfined Compressive Strength of Gyeongju Compacted Bentonite for Nuclear Waste Repository | 10.1007/s12205-020-0372-z |
2020-09-01 | Abstract— Axisymmetric and non-axisymmetric in-plane vibrations of thin radially growing disc are considered in the frame of the Kelvin–Voigt model of linear viscoelasticity. The main focus of the research is on asymptotic behavior of solutions to the model. Mixed boundary value problems are formulated and converted in... | Axisymmetric and Non-Axisymmetric Vibration of Thin Growing Viscoelastic Disc | 10.3103/S0025654420050179 |
2020-09-01 | Formulas for calculating the change of vibration of the support of a turbine-generator set with an attached dynamic vibration damper are given in the frequency band of its efficient operation. In calculation with the relative damping ratio of the dynamic vibration damper, the value of which is determined by the propose... | Influence of Damping on the Calculation Results of the Vibration Parameters of the Support of a Turbine-Generator Set with an Attached Dynamic Vibration Damper | 10.1007/s10749-020-01221-y |
2020-09-01 | In this work, planar free vibrations of a single physical pendulum are investigated both experimentally and numerically. The laboratory experiments are performed with pendula of different lengths, for a wide range of initial configurations, beyond the small angle regime. In order to approximate the air resistance, thre... | Estimation of parameters of various damping models in planar motion of a pendulum | 10.1007/s11012-020-01197-z |
2020-09-01 | In order to improve the force tracking performance of hydraulic quadruped robots in uncertain and unstructured environments, an impedance-based adaptive reference trajectory generation scheme is used. Secondly, in order to improve the robustness to environmental changes and reduce the contact force errors caused by tra... | Robust force tracking control via backstepping sliding mode control and virtual damping control for hydraulic quadruped robots | 10.1007/s11771-020-4490-z |
2020-09-01 | Polymeric composites exhibit load sensitive stiffness unlike the case of homogeneous metallic material. Composites are widely used in dynamic loading environment and hence it is necessary to study their response in terms of structural properties. Behavioural changes of glass epoxy composite laminate on exposure to cycl... | Assessment of Cyclic Load Induced Energy Dissipation and Damping on GFRP Composite Laminate | 10.1007/s12221-020-9813-z |
2020-09-01 | In this paper, the considered two-DOF system consists of a linear oscillator (LO) under external harmonic excitation and an attached lightweight nonlinear energy sink (NES) with local potential and geometrically nonlinear damping. With the application of complex-averaging method, the steady-state dynamical behavior of ... | Dynamic analysis of the nonlinear energy sink with local and global potentials: geometrically nonlinear damping | 10.1007/s11071-020-05876-0 |
2020-09-01 | Nonlinear flexural vibrations of rectangular atomic force microscope cantilever have been investigated by both the theoretical model and experimental works. As for the theoretical model, the Timoshenko beam theory which takes the rotatory inertia and shear deformation effects into consideration has been adopted. To inc... | Experimental and theoretical investigations about the nonlinear vibrations of rectangular atomic force microscope cantilevers immersed in different liquids | 10.1007/s00419-020-01703-5 |
2020-09-01 | The efficacy of forty treatments of inorganic salts as possible alternatives to synthetic fungicides for suppressing damping-off of cotton seedlings was evaluated. Seed treatments at rates of 2, 4, 6, 8, and 10 g salt per kg seeds were applied. The results showed that potassium phosphate monobasic (2 g per kg seeds) wa... | Control of Cotton Seedling Damping-off by Treating Seed with Inorganic Salts | 10.1007/s10343-020-00510-w |
2020-09-01 | Carbonate soils are located in temperate and tropical regions of the earth. This kind of soil has special mechanical properties compared with siliceous sand due to special sedimentary environment. In this paper, resonant column device is used to investigate the shear modulus and damping ratio of carbonate sand in the S... | The study of dynamic properties of carbonate sand through a laboratory database | 10.1007/s10064-020-01785-z |
2020-09-01 | We developed a novel magnetic resonance elastography (MRE) analysis method based on Fourier transform to assess the responsive characteristics for different tissue stiffness and degree of transmission of the vibration wave emanating from a passive driver during MRE. A phantom tissue study was conducted with an MRE sequ... | Quantitative analysis of vibration waves based on Fourier transform in magnetic resonance elastography | 10.1007/s12194-020-00579-y |
2020-09-01 | Identifying the susceptible period when environmental factors affect disease risk is essential for understanding disease etiology. Most existing epidemiologic studies use oversimplified summaries of time-dependent exposures such as baseline or most current exposure, or the cumulative average of exposure over available ... | Latency estimation for chronic disease risk: a damped exponential weighting model | 10.1007/s10654-020-00658-9 |
2020-09-01 | Abstract The angular motion of a CubeSat-type nanosatellite with a passive magnetic attitude control system is mathematically modelled. The attitude control system consists of a permanent magnet and hysteresis dampers in the form of a plate or a set of rods. The parameters of the hysteresis dampers are studied using a ... | Modeling a Nanosatellite’s Angular Motion Damping Using a Hysteresis Plate | 10.1134/S2070048220050075 |
2020-09-01 | Semi-active systems with variable stiffness and damping have demonstrated excellent performance. The aim of this study is to investigate the new configuration of a semi-active single-stage nonlinear vibration isolation system with a Magneto-Rheological (MR) damper to reduce the magnitude of force transmissibility over ... | Modeling and controlling a semi-active nonlinear single-stage vibration isolator using intelligent inverse model of an MR damper | 10.1007/s12206-020-0804-1 |
2020-09-01 | Presently, earthquake-resistant design provisions are based on the assumption of inelastic behaviour of structures in major earthquake occurrences. It is generally possible to achieve ductile behaviour with significant damage in steel and reinforced concrete structures. The passive control system is generally used to p... | Vibration control of structure by top base isolated storey as tuned mass damper | 10.1007/s40435-020-00614-1 |
2020-08-28 | This work underlines the importance of the application of fractional-order derivative damping model in the modelling of the viscoelastic foundation, by demonstrating the effect of various orders of the fractional derivative on the dynamic response of plates resting on the viscoelastic foundation, subjected to concentra... | On the transient response of plates on fractionally damped viscoelastic foundation | 10.1007/s40314-020-01285-6 |
2020-08-27 | We introduce a new model of the nonlocal wave equation with a logarithmic damping mechanism, which is rather weak as compared with frequently studied fractional damping cases. We consider the Cauchy problem for the new model in $$\mathbf{R}^{n}$$ R n and study the asymptotic profile and optimal decay rates of solutions... | Asymptotic profile and optimal decay of solutions of some wave equations with logarithmic damping | 10.1007/s00033-020-01373-x |
2020-08-24 | Damped vibration of a cracked Timoshenko beam with ends supported with damper, linear and rotational springs is investigated. Frequencies in complex forms have been obtained for both cracked Euler–Bernoulli and Timoshenko beams. Depending upon the crack-depth and crack-location, frequencies have been tabulated in each ... | Damped vibration analysis of cracked Timoshenko beams with restrained end conditions | 10.1007/s40430-020-02558-1 |
2020-08-14 | This paper addresses the problem of determining the optimal parameters of a sky-hook damper type suspension in the control of the stationary random response of half car vehicle models traversing a rough road with constant velocity. The feedback control scheme is realized by approximating the sky-hook damper strategy, a... | Optimal response of half car vehicle model with sky-hook damper using LQR with look ahead preview control | 10.1007/s40430-020-02552-7 |
2020-08-01 | Based on the similarity theory, two physical models of the double-arch tunnel with and without the damping layer are set. Through the shaking table test and numerical simulation, the damping effect of the foam concrete damping layer on the acceleration, stress, displacement and internal force of the shallow-buried bias... | Shaking Table Test and Numerical Simulation for Dynamic Response of Shallow-Buried Bias Double-Arch tunnel | 10.1007/s10706-020-01267-9 |
2020-08-01 | Demand of higher speeds in rotor systems has elevated the possibility of numerous instabilities. Internal damping is one of the key parameters for instability in such machinery. Its studies are generally conducted for a possible range of chosen internal damping values. Hence, experimental estimation of internal damping... | Experimental Identification of Internal and External Damping in a Rotor System with a Fatigue-Crack Using Full Spectrum | 10.1007/s40799-020-00368-7 |
2020-08-01 | Here we consider a string composed by three different materials: thermo elastic, viscoelastic and elastic. Our main result is that the exponential stability depends on the position of each material. That is, we prove that the model is exponentially stable if and only if the viscoelastic material is not in the center of... | Stability in Thermoviscoelasticity with Second Sound | 10.1007/s00245-018-9495-8 |
2020-08-01 | In this paper, we investigate the large time behavior of one dimensional coupled vibrating systems with fractionnal control applied at the coupled point. We prove well-posedness by using the semigroup theory. Also we establish an optimal decay result by frequency domain method and Borichev–Tomilov theorem. | On the asymptotic behaviour of two coupled strings through a fractional joint damper | 10.1007/s12215-019-00423-2 |
2020-08-01 | This paper investigates the dynamic response of a coated half-plane subjected to a harmonic Hertz load on the coating surface. The complex modulus is used to describe the hysteretic damping of the elastic homogeneous coating and half-plane. Using the Helmholtz decomposition and Fourier integral transform technique, we ... | Dynamic Response of a Coated Half-Plane with Hysteretic Damping Under a Harmonic Hertz Load | 10.1007/s10338-019-00150-2 |
2020-08-01 | For a pulsating free surface source in a three-dimensional finite depth fluid domain, the Green function of the source presented by John [Communs. Pure Appl. Math. 3:45–101, 1950] is superposed as the Rankine source potential, an image source potential and a wave integral in the infinite domain $$(0, \infty )$$ ( 0 , ∞... | New formulation of the finite depth free surface Green function | 10.1007/s10665-020-10058-3 |
2020-08-01 | This paper presents an integrated, new, and generic framework for layout optimization of viscoelastic damping for noise control of mid-frequency vibro-acoustic systems. The method is developed based on the concept of power balance among different modal energies between coupled structural and acoustic subsystems and is ... | Layout optimization of viscoelastic damping for noise control of mid-frequency vibro-acoustic systems | 10.1007/s00158-020-02524-4 |
2020-08-01 | The dynamic varied elastic modulus and damping coefficient of underground goaf are most important factors which describes the goaf absorption ability on seismic wave energy. This numerical simulation study have focused on the effect of goaf area on earthquake-wave propagation and seismic response on the ground surface ... | Simulation Study on Seismic Response of Ground Surface Above an Underground Longwall Goaf | 10.1007/s00024-020-02493-1 |
2020-08-01 | Thermoelastic damping (TED) is one of the main internal energy dissipation mechanisms in micro-/nano-resonators. Accurate evaluation of TED is important in the design of micro-electromechanical systems and nano-electromechanical systems. In this paper, a theoretical analysis on the TED in functionally graded material (... | Thermoelastic Damping of Functionally Graded Material Micro-Beam Resonators Based on the Modified Couple Stress Theory | 10.1007/s10338-019-00155-x |
2020-08-01 | In this paper, it is considered a quasi-linear strongly-damped wave equation defined by a non-linear partial differential equation of third order. The equation describes motions of viscoelastic solids. We study the conservation laws of this equation. By applying the multiplier method of Anco and Bluman to the equation,... | Conservation laws and symmetry analysis for a quasi-linear strongly-damped wave equation | 10.1007/s10910-020-01146-x |
2020-08-01 | The paper highlights the importance of using site-specific shear modulus reduction ( G / G _max versus shear strain, γ ) curves and damping ratio ( D versus shear strain, γ ) curves for ground response analysis. In order to develop comprehensive G / G _max–γ and D – γ curves (i.e. over a wide range of strain level), tw... | Dynamic soil properties and seismic ground response analysis for North Indian seismic belt subjected to the great Himalayan earthquakes | 10.1007/s11069-020-03995-w |
2020-08-01 | In this paper, a control system is proposed for the vibration suppression of a semi-submersible offshore wind turbine equipped with a tuned liquid multi-column damper (TLMCD). The TLMCD consists of three columns of liquid integrated into the superstructure of the semi-submersible platform. To improve the vibration supp... | Semi-active vibration control of a semi-submersible offshore wind turbine using a tuned liquid multi-column damper | 10.1007/s40722-020-00171-x |
2020-07-31 | This paper proposes a novel, simple and high-efficient submerged structural stabilization system for a self-stabilizing buoy that provides a stable platform for oceanographic and meteorological sensors. The proposed stabilization system is a Seesaw-like Tuned Mass Damper (STMD) combined with a foil and is designed in a... | Design, assessment and evaluation of structural stabilization system for weather buoys using a moving foil | 10.1186/s40648-020-00178-x |
2020-07-16 | The dynamic properties of lime-solidified soft soil affect the safety and function of buildings. In this study, lime was used to solidify soft soil from the Binhai New District of Tianjin, China. A dynamic triaxial testing system was used to measure the dynamic stress-strain curves of solidified soft soil samples for d... | Experimental study on the dynamic properties of lime-solidified soft soil under cyclic loading | 10.1007/s12517-020-05721-z |
2020-07-06 | In this work, the exponential growth of solutions for a coupled nonlinear Klein–Gordon system with distributed delay, strong damping, and source terms is proved. Take into consideration some suitable assumptions. | Growth of solutions for a coupled nonlinear Klein–Gordon system with strong damping, source, and distributed delay terms | 10.1186/s13662-020-02801-y |
2020-07-05 | The stress–strain characteristics of soil under monotonic loading conditions and the dynamic properties of soils under cyclic loading are necessary for foundation engineering, ground response analysis and soil structure interaction studies. In the absence of site/region-specific properties, it is a common practice to u... | Monotonic and dynamic properties of riverbed sand and hill-slope soils of seismically active North-east India for ground engineering applications | 10.1186/s40703-020-00116-1 |
2020-07-03 | In this paper, we consider the spectral problem for a Stieltjes string with both ends fixed and with one-dimensional damping at an interior point. We solve an inverse problem of recovering parameters of the Stieltjes string using partial information on the string and partial information on the spectrum. First we prove ... | Inverse Problem for a Stieltjes String Damped at an Interior Point | 10.1007/s00020-020-02587-4 |
2020-07-01 | Abstract The damping composites from the materials with different elastic hysteresis properties have been studied at dynamic loads and temperatures of +23°C and –40°C. A sandwich shock absorber for a rail damping element that is 14 mm in thickness from fiber-reinforced rubber composite and thermoplastic elastomer, whic... | Damping Composites from Materials with Different Elastic Hysteresis Properties for Sandwich Shock Absorbers of Railroad Transport | 10.1134/S2075113320040218 |
2020-07-01 | A hybrid type magneto-rheological (MR) fluid damper based on electromagnet and two permanent magnets apart from electromagnet was designed and its characteristics were analyzed numerically. In the proposed MR damper, the magnetic field is generated by the permanent magnet and raised by the additional electromagnet. Thi... | Design and geometric parameter optimization of hybrid magnetorheological fluid damper | 10.1007/s12206-020-0627-0 |
2020-07-01 | In view of the problem that large-scale and high-penetration wind power access may weaken the stability of small interference in the power grid, this study proposes a novel additional damping controllers for the doubly-fed induction generator (DFIG) based on the genetic algorithm. A DFIG model and its control system is... | Genetic Algorithm-Based Analysis of the Effects of an Additional Damping Controller for a Doubly Fed Induction Generator | 10.1007/s42835-020-00440-7 |
2020-07-01 | Abstract This paper considers the classical methods of surface damping of bending vibrations of thin-walled structures and a promising integral version of a damping coating consisting of two layers of a material with pronounced viscoelastic properties separated by a thin reinforcing layer of a high modulus material. A ... | COMPLEX EIGENFREQUENCIES AND DAMPING PROPERTIES OF AN ELONGATED PLATE WITH AN INTEGRAL DAMPING COATING | 10.1134/S0021894420040148 |
2020-07-01 | Nanomaterials with their extremely high free surfaces can effectively augment damping in nanocomposites via frictional sliding along the interface of nanomaterials and a matrix. Despite this potential, existing state of knowledge about the damping behavior of graphene reinforced nanocomposites is at an embryonic stage.... | Graphene Size and Morphology: Peculiar Effects on Damping Properties of Polymer Nanocomposites | 10.1007/s11340-020-00592-7 |
2020-07-01 | We present a unified model of electrostatic sensors comprising cantilever microbeam resonators in fluid media. The model couples Euler–Bernoulli beam equation to the nonlinear Reynolds equation. Static, damped eigenvalue, and dynamic reduced-order models were developed and validated by comparing a nonlinear frequency r... | A unified model for electrostatic sensors in fluid media | 10.1007/s11071-020-05780-7 |
2020-07-01 | An improved version of the direct displacement-based design (DDBD) method for the seismic design of plane moment resisting frames in the framework of performance-based design approach is presented. The method employs a multi-degree-of-freedom equivalent system instead of the single-degree-of-freedom equivalent system u... | A direct displacement-based seismic design method using a MDOF equivalent system: application to R/C framed structures | 10.1007/s10518-020-00857-5 |
2020-07-01 | Abstract Theoretical explanation of the experimentally discovered effect of a decrease in the excitation energy of surface and volume plasma oscillations of valence Si (111) electrons during the implantation of Ba and alkaline-element ions with a large dose of D > 10^16 cm^–2 is presented in this paper. On the basis of... | Theoretical Explanation of the Effect of a Decrease in the Si(111) Plasmon Energy during the Implantation of Ions with a Large Dose | 10.1134/S102745102004031X |
2020-07-01 | Subjected to dynamic excitations, bolted joint interfaces exhibit nonlinear characteristics that significantly affect the dynamic response of assembled structures. In this paper, a novel modeling method is developed to improve the prediction accuracy of the tangential contact behavior of bolted joint interfaces. This m... | Modeling tangential friction based on contact pressure distribution for predicting dynamic responses of bolted joint structures | 10.1007/s11071-020-05765-6 |
2020-07-01 | Abstract Basic approaches are outlined to solving complex engineering problems arising in the design and operation of power units at nuclear power stations (NPS) and based on large-scale physical simulation of dynamic conditions and parameters of dynamics and structural strength of modern power facilities. A procedure ... | Physical Simulation of Dynamic Processes in Hydroeleastic Systems at Nuclear Power Stations | 10.1134/S0040601520070034 |
2020-07-01 | Abstract We study natural vibrations of the fluid column in a vertical oil well that occur during sudden shutdown or start-up of the well (water hammer). In this case, the period of vibration and the intensity of vibration damping are determined not only by the length and diameter of the fluid column in the well and th... | DAMPED NATURAL VIBRATIONS OF FLUID IN A WELL INTERFACED WITH A RESERVOIR | 10.1134/S002189442004001X |
2020-07-01 | This paper investigates the axial vibration of single-walled carbon nanotubes (SWCNTs) with fractional damping based on doublet mechanics. The Kelvin–Vigot model is used to incorporate damping effect for CNTs. By solving the equation of motion, the relation between natural frequency with scale parameter and fractional ... | Axial vibration of single-walled carbon nanotubes with fractional damping using doublet mechanics | 10.1007/s12648-019-01547-y |
2020-07-01 | Microbeam resonators are widely used due to their scientific and engineering applications. The accurate prediction of thermoelastic damping (TED) is necessary to evaluate the performance of resonators at micro- and nanoscales with less energy dissipation. This article aims to present an analytical method for analyzing ... | Thermoelastic damping analysis in microbeam resonators based on Moore–Gibson–Thompson generalized thermoelasticity theory | 10.1007/s00707-020-02688-6 |
2020-07-01 | A nonlinear vibration isolation system is promising to provide a high-efficient broadband isolation performance. In this paper, a generalized vibration isolation system is established with nonlinear stiffness, nonlinear viscous damping, and Bouc-Wen (BW) hysteretic damping. An approximate analytical analysis is perform... | Research on linear/nonlinear viscous damping and hysteretic damping in nonlinear vibration isolation systems | 10.1007/s10483-020-2630-6 |
2020-07-01 | A damped Newton’s method to find a singularity of a vector field in Riemannian setting is presented with global convergence study. It is ensured that the sequence generated by the proposed method reduces to a sequence generated by the Riemannian version of the classical Newton’s method after a finite number of iteratio... | Damped Newton’s method on Riemannian manifolds | 10.1007/s10898-020-00885-0 |
2020-06-22 | In this paper, we prove that the existence of global attractors for a Kirchhoff wave equation with nonlinear damping and memory. | Global attractors for Kirchhoff wave equation with nonlinear damping and memory | 10.1186/s13661-020-01413-5 |
2020-06-19 | In this paper, we study the initial-boundary value problem for a system of nonlinear viscoelastic equations with Balakrishnan–Taylor damping terms and nonlinear source of polynomial type. We demonstrate that the nonlinear source of polynomial type is able to force solutions to blow up infinite time even in presence of ... | Blow-Up of Solutions for a System Viscoelastic Equation with Balakrishnan–Taylor Damping and Nonlinear Source of Polynomial Type | 10.1007/s40819-020-00858-7 |
2020-06-10 | A new semi-active mass damper, included active joint to control Lock/Unlock between the mass of damper and structure, is proposed to avoid “de-tuning effect” in this study. A ten-floor shear building with Tuned Mass Damper (TMD) and Semi-Active Mass Damper (SAMD) under excitation of 26 earthquake records is simulated b... | Development of semi-active mass damper with impulsive reaction | 10.1007/s12046-020-01395-1 |
2020-06-02 | In the present study, it was attempted to investigate the cyclic resistance of equi-proportionate silt–sand range pond ash (with 50% fines) at relatively high shear strains using the strain-controlled cyclic triaxial test. The cyclic triaxial tests have been performed considering the effect of relative compaction (97–9... | Experimental Investigation on Dynamic Characterization of Equi-Proportionate Silt–Sand Range Pond Ash at High Strain | 10.1007/s40891-020-00211-4 |
2020-06-01 | This paper considers a spherical particle damper that is subjected to impact loading. An experiment using a viscoanalyser machine was performed to obtain the viscoelastic properties (Young’s modulus and loss factor) at any temperature and any frequency. This procedure extracts the master curve for the viscoelastic mate... | Viscoelastic Behaviour of Element of Particle Damper: Experimental and Numerical Study | 10.1007/s40997-018-0277-3 |
2020-06-01 | This paper presents a theoretical investigation on the response of free vibration of functionally graded material (FGM) micro-plates with thermoelastic damping (TED). Continuous through thickness variation of the mechanical and thermal properties of the FGM plate is considered. By employing the simplified one-way coupl... | Analysis of free vibration of functionally graded material micro-plates with thermoelastic damping | 10.1007/s00419-020-01664-9 |
2020-06-01 | Reynolds equation for aerostatic bearing is numerically solved to obtain the stiffness, damping and critical frequency characteristics. The inertia and critical frequency are simulated as a function of bearing number and nozzle restriction number. The Reynolds equation is resolved for given dynamic properties of vibrat... | Numerical Simulation of Aerostatic Bearing Stiffness, Damping and Critical Frequency Properties Using Linear Stability Analysis | 10.1007/s40032-020-00566-7 |
2020-06-01 | In this study, we focus on the controllability of fractional-order damped systems in linear and nonlinear cases with multiple time-varying delays in control. For the linear system based on the Mittag-Leffler matrix function, we define a controllability Gramian matrix, which is useful in judging whether the system is co... | Controllability of fractional-order damped systems with time-varying delays in control | 10.1631/FITEE.1900736 |
2020-06-01 | In this article, we deal with the existence of mild L -quasi-solutions for damped elastic systems in Banach spaces. The results improve and extend some relevant results in ordinary differential equations and partial differential equations. Under monotone condition and the noncompactness measure condition on nonlinearit... | Mixed monotone iterative technique for damped elastic systems in Banach spaces | 10.1007/s11868-019-00296-0 |
2020-06-01 | An efficient global optimization algorithm has been developed by combining GA (genetic algorithm) and SA (simulated annealing). It is observed that the coupled optimization algorithm can converge faster than each single algorithm. It is applied for the design optimization of damper coil springs that absorb the torsiona... | Coupled GA-SA Optimization Algorithm and Application for Compressive Curved Damper Springs of Automotive Lockup Clutches | 10.1007/s12239-020-0061-4 |
2020-06-01 | Dealing with the physical interaction between humans and robots, Series Elastic Actuators (SEAs) are identified as one solution to overcome many limits, such as reducing contact forces or detect collisions. Nevertheless, the low-damping dynamic of a SEA can lead to undesired behaviours, especially during particular app... | A Robust Linear Control Strategy to Enhance Damping of a Series Elastic Actuator on a Collaborative Robot | 10.1007/s10846-019-01071-5 |
2020-06-01 | The aim of this work is to compare two different joining technologies for steel and carbon fibre reinforced polymer materials in a hybrid gear in order to improve the dynamic behaviour in terms of natural frequencies and damping properties. A comprehensive approach for the design and prototyping of hybrid metal-composi... | A comparative analysis of adhesive bonding and interference fitting as joining technologies for hybrid metal-composite gear manufacturing | 10.1007/s12008-020-00647-y |
2020-06-01 | The studies on acoustical behaviour of composite boards made from five different types of natural fibres (bagasse, bamboo, banana, coir and corn husk) have been carried out for their utilization as sound-absorbing materials. The composite boards of all five types of fibres were prepared in three different density range... | Acoustical behaviour of natural fibres-based composite boards as sound-absorbing materials | 10.1007/s13196-020-00255-z |
2020-06-01 | In this paper, stability investigations of a novel roughing-finishing end mill are carried out. This tool possesses two sharp finishing teeth and two radially recessed, chamfered roughing teeth. By applying the same tool for roughing and finishing operations, tool changes and process time can be reduced. For the stabil... | Process stability of a novel roughing-finishing end mill | 10.1007/s11740-020-00963-y |
2020-06-01 | The equation governing the dynamics of a heat-exchanger tube is a delay differential equation (DDE). In all the earlier studies, only the stability boundaries in the parametric space of mass-damping parameter and reduced flow-velocity were reported. The contour plots showing the damping in different regions of the stab... | A note on damping in heat-exchanger tubes subjected to cross-flow | 10.1007/s40435-019-00590-1 |
2020-06-01 | This study presents an advanced algorithm for controlling the web longitude and tension of nonlinear roll-to-roll systems in the form of a cascade structure. Parameter variation and disturbance attenuation problems are addressed systematically. The features of this article are divided into two parts. First, active damp... | Active damping injection controller for web longitude and tensions of nonlinear roll-to-roll systems | 10.1007/s11071-020-05711-6 |
2020-06-01 | We prove $$L^r$$ L r -estimates on periodic solutions of periodically forced, linearly damped mechanical systems with polynomially bounded potentials. The estimates are applied to obtain a nonexistence result of periodic solutions in bounded domains, depending on an upper bound on the gradient of the potential. The res... | Nonexistence of Periodic Orbits for Forced–Damped Potential Systems in Bounded Domains | 10.1007/s00332-020-09607-y |
2020-06-01 | A new metal foam magneto-rheological (MR) fluid damper is optimized, and the mechanical performance is investigated experimentally. With a magnetic field, MR fluid is extracted from the metal foam and fills up the shear gap to produce the MR effect. The magnetic field density in the shear gap and the structural paramet... | Parameter optimization of a metal foam magneto-rheological damper | 10.1007/s10999-019-09463-z |
2020-06-01 | Purpose An experimental–numerical study of an inverted pendulum system to control a reduced model of a main system is developed in this work. Method Initially, a dynamic system model with one degree of freedom (1DoF) translational in the horizontal direction is analyzed. To this system is coupled a passive control devi... | Experimental Analysis of One-Degree-of-Freedom (1DoF) Dynamic System Controlled by Optimized Inverted Pendulum | 10.1007/s42417-020-00198-2 |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.