publicationDate stringlengths 10 10 | abstract stringlengths 0 37.3k | title stringlengths 1 5.74k | doi stringlengths 11 47 ⌀ |
|---|---|---|---|
2020-01-01 | Active vibration dampers can reduce or eliminate unwanted vibrations, but determining a good control policy can be challenging for highly nonlinear systems. For these types of systems, reinforcement learning is one method to optimize a control policy with only limited prior knowledge of the system dynamics. An experime... | Reinforcement Learning for Active Damping of Harmonically Excited Pendulum with Highly Nonlinear Actuator | 10.1007/978-3-030-12391-8_15 |
2020-01-01 | Damping plays an important role in the simulation of the mechanical system. Various damping models are used such us non-viscous damping, coulomb damping, and hysteresis damping. For mathematical convenience, Rayleigh damping is usually used in a gear system to model damping. Rayleigh damping coefficients (RDCs) can be ... | Rayleigh Damping Coefficients Identification Using the Wavelet Transform on Two Stage Gear System | 10.1007/978-3-030-24247-3_23 |
2020-01-01 | The fast mechanical switch equipped with the Thomson-coil actuator is one of the key devices in hybrid HVDC circuit breaker. And electromagnetic damping technology can solve the problems of high-speed damping operation without adding additional mechanical parts. In order to make the opening/closing operation process as... | Effect of Voltage on Thomson-Coil Actuator for Fast Mechanical Switch | 10.1007/978-3-030-31680-8_129 |
2020-01-01 | We consider the following Cauchy problem for a wave equation with time-dependent damping term b ( t ) u _ t and mass term m ( t )^2 u , and a time-dependent non-linearity h = h ( t , u ): u t t − Δ u + b ( t ) u t + m 2 ( t ) u = h ( t , u ) , t ≥ 0 , x ∈ ℝ n , u ( 0 , x ) = f ( x ) , u t ( 0 , x ) = g ( x ) . $$\dis... | Small Data Solutions for Semilinear Waves with Time-Dependent Damping and Mass Terms | 10.1007/978-3-030-36138-9_14 |
2020-01-01 | This paper presents the full spectrum analysis of a cracked Jeffcott rotor with the internal and external damping. In this study, a mathematical model is developed for a Jeffcott rotor considering both external and internal damping, crack force, and unbalance force. The crack in the rotor model is considered as switchi... | A Full Spectrum Analysis of a Jeffcott Rotor with Switching Crack in the Presence of Internal and External Damping | 10.1007/978-981-15-5693-7_9 |
2020-01-01 | Abstract An asymptotic method for investigating small oscillations of fluids in cylindrical tanks with longitudinal damping partitions is presented. The effect of the number and width of partitions on the hydrodynamic parameters and the damping coefficients of fluid oscillations is studied in detail for the case of a c... | Fluid Oscillations in Cylindrical Tanks with Longitudinal Damping Partitions | 10.1134/S001546281906003X |
2020-01-01 | The article is dedicated to the study of anti-vibration properties of vehicle suspension at optimal instantaneous damping control in oscillation cycle. These suspensions in foreign literature are called “semi-active control suspensions.” However, its vibration isolation properties have not been thoroughly analyzed. Thi... | Vibration Isolation Properties of Vehicle Suspension at Optimal Instantaneous Damping Control in Oscillation Cycle | 10.1007/978-3-030-22041-9_87 |
2020-01-01 | The logarithmic decrement method is perhaps the most common technique for estimating the damping ratio of linear systems with viscous damping. The approach directly relates the damping ratio to two samples collected from peaks of a recorded free oscillation. These peaks are separated by one or more oscillation periods ... | Optimizing Logarithmic Decrement Damping Estimation via Uncertainty Analysis | 10.1007/978-3-030-12243-0_3 |
2020-01-01 | In this chapter, we study the electrostatic boundary-value problems involving planar two-dimensional electron gas layers. The main interest and the key first applications of presented boundary-value problems concern doped graphene, while keeping in mind the analysis can be applied to semiconductor inversion layers, hig... | Electrostatic Problems Involving Two-Dimensional Electron Gases in Planar Geometry | 10.1007/978-3-030-43836-4_6 |
2020-01-01 | In acoustoelectric and piezotronic devices, the redistribution or motion of charge carriers is caused or affected by mechanical loads through the electric field produced via piezoelectric coupling. This coupling can also happen in composite structures of piezoelectric dielectrics and nonpiezoelectric semiconductors. In... | Composite Structures | 10.1007/978-3-030-48206-0_6 |
2020-01-01 | Frequency spectra of torsional vibration and contact force are very important to understand the dynamic behavior of a horizontal axis wind turbine drivetrain system (WTDS). The drivetrain has three gear stages, namely one planetary and two parallel gear stages. Hence, a mathematical model is developed to understand the... | Dynamic Analysis of Wind Turbine Drivetrain Under Constant Torque | 10.1007/978-981-15-4032-5_55 |
2020-01-01 | Large-capacity wind farms may increase the risk of torsional vibration of turbine generator shafts in the wind-thermal-bundled power transmitted by series-compensated system, therefore the analysis and suppression strategy of sub-synchronous oscillation (SSO) in such system needs to be thoroughly studied. In this paper... | Analysis and Suppression Strategy of Sub-synchronous Oscillation for Wind-Thermal-Bundled Power Transmitted by Series-Compensated System | 10.1007/978-981-13-9783-7_1 |
2020-01-01 | High Quality factor ( Q factor) resonator is a mandatory requirement for very fine resolution Hemispherical Resonator Gyroscope (HRG). It is a measure of damping. This paper discusses the role of Thermo Elastic Dynamic Damping (TEDD) when the resonator is operating in its functional vibration mode. Finite Element (FE) ... | Design of Inertial Class Gyroscope Resonator with Ultrahigh Quality Factor for Interplanetary Space Missions | 10.1007/978-981-15-0124-1_95 |
2020-01-01 | In most of the applications of vibration compared to the elastic and inertia forces, the magnitude of damping forces is small. Under certain circumstances, these small forces may, however, create great influence. Damping is one of the important parameters in the study of dynamic systems. It is generally measured under ... | Analysis of Internal Damping in Rotating Shaft | 10.1007/978-981-15-1124-0_60 |
2020-01-01 | We study the linearized Vlasov equations and the linearized Vlasov–Fokker–Planck equations in the weakly collisional limit in a uniform magnetic field. In both cases, we consider periodic confinement and Maxwellian (or close to Maxwellian) backgrounds. In the collisionless case, for modes transverse to the magnetic fie... | The Linearized Vlasov and Vlasov–Fokker–Planck Equations in a Uniform Magnetic Field | 10.1007/s10955-019-02441-x |
2020-01-01 | In boring process, casted, forged, or extruded holes in components are finished with a boring bar having cutting insert at its frontend. Dynamic and static deflections are always there in the boring bar due to its slenderness. The generating force for chatter is supplied by the cutting process itself, so it creates pro... | Experimental Investigation of Chatter in Boring Operation Using Shim | 10.1007/978-981-15-3746-2_23 |
2020-01-01 | An algorithm for controlling the hydraulic damping of an innovative articulation for an articulated vehicle was tested with respect to the stability of the vehicle movement while avoiding a road obstacle at 50 km/h by a double change of the lane. Related maneuvers were simulated using LabVIEW software. Two testing meth... | Selected Tests of a Control System for an Articulated Vehicle with Innovative Articulation | 10.1007/978-3-030-29993-4_9 |
2020-01-01 | This paper presents a novel arrangement of a current blocking shunt circuit for the mitigation of multiple structural resonances. The number of required electrical components is reduced compared to the previous versions of this circuit proposed in the literature. This paper also proposes a tuning methodology for the el... | A Simplified Current Blocking Piezoelectric Shunt Circuit for Multimodal Vibration Mitigation | 10.1007/978-3-030-12243-0_4 |
2020-01-01 | In order to avoid damage to mechanical structure, the vibration damping is necessary. The conventional methods of damping are less effective as well as tedious. This paper deals with passive techniques of vibration damping using piezoelectric material. Piezoelectric materials called as smart materials are bonded to str... | Effective Vibration Damping Using Self-tuning Smart Material | 10.1007/978-981-15-2329-8_7 |
2020-01-01 | This paper presents preliminary experimental results from a novel shaking table testing campaign investigating the dynamic response of a two-degree-of-freedom (2DOF) physical specimen with a grounded inerter under harmonic base excitation and contributes a nonlinear dynamic model capturing the behavior of the test spec... | Shake Table Testing of a Tuned Mass Damper Inerter (TMDI)-Equipped Structure and Nonlinear Dynamic Modeling Under Harmonic Excitations | 10.1007/978-3-030-41057-5_122 |
2020-01-01 | Vibrating flip-flow screens provide an effective solution for screening highly viscous or fine materials. However, only linear theory has been applied to their design. Yet, to understand deficiencies and to improve performance an accurate model especially of the rubber shear springs equipped in screen frames is critica... | A Non-linear Model of Rubber Shear Springs Validated by Experiments | 10.1007/978-3-030-34713-0_32 |
2020-01-01 | Reduction of the vibration amplitude is often problem in mechanical and civil engineering. Damping of the oscillation could be done by changing the mass and stiffness. This approach often requires a change in the constructive system solution. The alternative is active vibration damping systems, which, depending on the ... | Systems for Passive and Active Vibration Damping | 10.1007/978-3-030-18072-0_10 |
2020-01-01 | Surface treatments on aluminum substrates are introduced to improve the bonding characteristics between rubber and aluminum components that are widely used in automotive industries. This present work involves the modification of surface roughness of aluminum plates either by sand blasting or anodizing or graphene coati... | Effect of Aluminum Surface Treatment on the Damping Properties of Aluminum-Rubber Bonding System | 10.1007/978-981-15-0950-6_76 |
2020-01-01 | One of the greatest challenges to the optimization of assembled systems is a lack of understanding of how jointed interfaces augment system dynamics. Thus, a design tool that can assess the nonlinearity of a joint prior to manufacturing and experimentation will lead to significant savings in qualification testing and i... | A Priori Methods to Assess the Strength of Nonlinearities for Design Applications | 10.1007/978-3-030-12391-8_35 |
2020-01-01 | In order to further improve the average off-road speed of special vehicles, a semi-active oil and gas spring design scheme is proposed, and the multi-stage damping adjustable function can be realized by parallel proportional throttle valve. Based on the physical model of oil and gas springs, the series-parallel relatio... | Modeling and Simulation Analysis of Semi-active Oil and Gas Spring Characteristics | 10.1007/978-3-030-34387-3_51 |
2020-01-01 | Abstract The mechanical and damping characteristics of titanium–aluminum foam composite materials obtained via casting of a mold with aluminum filled with pore-forming granules and titanium fittings are investigated in this work. Titanium reinforcement of aluminum foam is shown to increase the strength of a foamed mate... | Mechanical and Operational Characteristics of Layered Titanium–Aluminum Foam Composite Materials | 10.1134/S2075113320010244 |
2020-01-01 | Perturbed Markov chains are popular models for description of information networks. In such models, the transition matrix $$\mathbf {P}_0$$ of an information Markov chain is usually approximated by matrix $$\mathbf {P}_{\varepsilon } = (1 - \varepsilon ) \mathbf {P}_0 + \varepsilon \mathbf {D}$$ , where $$\mathbf {D}$$... | Perturbation Analysis for Stationary Distributions of Markov Chains with Damping Component | 10.1007/978-3-030-41850-2_38 |
2020-01-01 | The objective of this work is to establish an accurate non-linear parametric model which relates the physical parameters with the damping characteristics of the hydraulic damper before relieving. A new non-linear parametric model including the sub-models of the orifice, hydraulic fluid, pressure chambers, reservoir cha... | Study on the Non-linear Parametric Model of Hydraulic Dampers Before Relieving for Railway Vehicles | 10.1007/978-3-030-38077-9_72 |
2020-01-01 | We investigate the nonlinear dynamic response of a device made of two electrically coupled cantilever microbeams. The vibrations of the microbeams triggered by the electric actuation lead to the redistribution of the air flow in the gap separating them and induce a damping effect, known as the squeeze-film damping. Thi... | Multifidelity modeling and comparative analysis of electrically coupled microbeams under squeeze-film damping effect | 10.1007/s11071-019-04928-4 |
2020-01-01 | To study the transient interaction between the transformers and the power system is essential use very accurate transformer models considering the dependence of damping with frequency. In this work the fundamentals of transformer parameters calculation for high frequency transients using finite elements method (FEM) ar... | Calculation of Circuit Parameters of High Frequency Models for Power Transformers Using FEM | 10.1007/978-981-15-5600-5_14 |
2020-01-01 | The Gilbert damping parameter $$\alpha$$ represents the rate of energy dissipation associated with magnetic dynamics, characterizing the relaxation of magnetic dynamics to its equilibrium state. In Chap. 2 , it is assumed that $$\alpha$$ of ferrimagnetic GdFeCo is constant in the temperature range across $${T}_{\mathrm... | Gilbert Damping Parameter of Ferrimagnets Probed by Domain Wall Motion | 10.1007/978-981-15-9176-1_3 |
2020-01-01 | This paper proposes a novel fully integrated digitally controlled active inductor for damping of ultrasonic transducer. Using new grounded inductor simulator (GIS) topology, the work addresses number of design challenges to demonstrate a feasibility of active damping of a transformer-less ultrasonic distance measuremen... | A fully integrated digitally controllable grounded inductor simulator with a large inductance range for damping of ultrasonic transducers | 10.1007/s10470-019-01396-z |
2020-01-01 | The study of both linear and nonlinear structural vibrations routinely circles the concise yet complex problem of choosing a set of coordinates which yield simple equations of motion. In both experimental and mathematical methods, that choice is a difficult one because of measurement, computational, and interpretation ... | Transient dynamics, damping, and mode coupling of nonlinear systems with internal resonances | 10.1007/s11071-019-05198-w |
2020-01-01 | Synchronous static compensator (STATCOM) can also be used to improve the dynamic performance of a power system apart from being used for reactive power compensation. This article performs a comparative study for robust STATCOM control designs based on graphical loop-shaping and simultaneous tuning using Particle Swarm ... | Comparative Study for Robust STATCOM Control Designs Based on Loop-Shaping and Simultaneous Tuning Using Particle Swarm Optimization | 10.1007/978-981-15-4775-1_45 |
2020-01-01 | Detection of inadequate tightening in bolted joints is quintessential to ensure structural rigidity and to prevent catastrophic failure. Studies show that 30% of assembly failures occur due to inadequate tightening. In the present study, three vibration-based techniques are presented and compared to detect inadequate t... | Modeling and Experimental Studies on the Dynamics of Bolted Joint Structure: Comparison of Three Vibration-Based Techniques for Structural Health Monitoring | 10.1007/978-981-15-5693-7_21 |
2020-01-01 | In order to improve the efficiency of damping characteristic adjustment for vehicle suspension shock absorber, the control system with a magnetorheological (MR) damper was proposed to realize the adjustable damping characteristic. The Bingham model of a MR damper was establish based on the damping force of the MR dampe... | Realization of Adjustable Damping Characteristic Based on a Magnetorheological Damper | 10.1007/978-3-030-38077-9_194 |
2020-01-01 | The use of shape memory alloys (SMA) is really promising in the field of vibration mitigation. Indeed, several works are already available in the literature, describing how to exploit the special features of SMAs in order to design and build dampers and tuned mass dampers (TMD). Regarding TMDs, the features of SMA mate... | Adaptive Multi-modal Tuned Mass Dampers Based on Shape Memory Alloys: Design and Validation | 10.1007/978-3-030-12676-6_14 |
2020-01-01 | In Chap. 3 , the Gilbert damping parameter $$\alpha $$ is obtained from the field-driven domain wall mobility and is found to be temperature-insensitive across the angular momentum compensation temperature, $${T}_{\mathrm{A}}$$ . Here, it should be noted that the most common experimental method to determine $$\alpha $$... | Gilbert Damping Parameter of Ferrimagnets Probed by Magnetic Resonance | 10.1007/978-981-15-9176-1_4 |
2020-01-01 | Operational Modal Analysis (OMA) is one of the most used technique to study structures under environmental excitations, for the purpose of structural health monitoring, acceptance test and model updating. In OMA, the modal parameters are obtained only from the measured data using environmental vibrations as unknown inp... | Influence of User-Defined Parameters Using Stochastic Subspace Identification (SSI) | 10.1007/978-3-030-41057-5_127 |
2020-01-01 | Based on the post-inhibitory rebound (PIR) spike induced by inhibitory current pulse, in the present paper, a novel counterintuitive phenomenon that the inhibitory autapse with time delay can induce the resting state changed to stable spiking pattern is identified near subcritical Hopf bifurcation of Hodgkin–Huxley mod... | Different dynamics of repetitive neural spiking induced by inhibitory and excitatory autapses near subcritical Hopf bifurcation | 10.1007/s11071-019-05342-6 |
2020-01-01 | This work explores the role of asymmetrical damping and geometrical nonlinearities in the suspension system of a simplified vehicle model in order to improve comfort. Improving comfort for passengers is a constant challenge for the automotive industry. Although technologies have been introduced for this purpose, many v... | Interaction between asymmetrical damping and geometrical nonlinearity in vehicle suspension systems improves comfort | 10.1007/s11071-019-05374-y |
2020-01-01 | Identification of modal parameters, when a structure is under operational conditions is termed Operational Modal Analysis (OMA). Current OMA techniques are based on the assumption of linear time-invariant systems, and thus have limited applicability when applied to structures known to violate these assumptions. The pre... | Output-Only Estimation of Amplitude Dependent Friction-Induced Damping | 10.1007/978-3-030-12115-0_3 |
2020-01-01 | This chapter gives a comprehensive review on R&D efforts to develop bio-based thermosetting resins and biocomposites for use in critical applications such as aircraft fabrication, rail transportation, and construction by a Chinese research consortium in collaboration with international teams. This work was initially mo... | Biopolymers and Biocomposites | 10.1007/978-3-030-35346-9_9 |
2020-01-01 | Recently, a new algorithm was presented (Festjens et al., Int J Mech Sci 75 (2013) 170–177) that allows one to predict the effective natural frequency and damping ratio as a function of amplitude for a structure with bolted joints. This paper applies a variant on that algorithm to a finite element model of the “S4 Beam... | Predicting S4 Beam Joint Nonlinearity Using Quasi-Static Modal Analysis | 10.1007/978-3-030-12391-8_5 |
2020-01-01 | Structural damping ratio which quantifies the energy dissipation of civil structures under external excitations plays a critical role in the seismic design and assessment of civil structures. In existing building design provisions and guidelines, however, the structural damping ratio is only suggested either as a singl... | Damping Ratios of Reinforced Concrete Structures Under Actual Ground Motion Excitations | 10.1007/978-3-030-12115-0_36 |
2020-01-01 | Scrap Tire Derived Materials (STDM) mixed with soil are often being used as geomaterials in civil engineering projects for reducing dynamic loads acting on geo-structures and soil liquefaction remediation purposes. On the other hand, any soil dynamic analysis involving STDM needs an estimation of dynamic characteristic... | An Artificial Intelligence Approach for Modeling Shear Modulus and Damping Ratio of Tire Derived Geomaterials | 10.1007/978-981-15-0890-5_49 |
2020-01-01 | This manuscript deals with a fractional PID controller which is proposed for inverted pendulum on a cart system (IPCS). The mathematical equivalent of the system is done by Euler–Lagrange’s method with the consideration controller and system frequency response specifications controller parameters like $$K_{p}$$ , $$K_{... | Control Quality Enhancement of Inverted Pendulum Using Fractional Controller | 10.1007/978-981-15-2256-7_64 |
2020-01-01 | In this study, a nonlinear mathematical model for drum-type washing machines is developed considering rotating unbalance type excitation. Nonlinear differential equations of motion are converted into a set of nonlinear algebraic equations by using harmonic balance method (HBM). The resulting nonlinear algebraic equatio... | Vibration Analysis of Washing Machines in the Drum Plane | 10.1007/978-3-030-34713-0_54 |
2020-01-01 | Inerter-based tuned mass dampers (TMDs) have been developed recently with the goal of improving upon the performance of traditional TMDs. However, studies investigating the response of single-degree-of-freedom (SDOF) systems with inerter-based TMDs have been primarily limited to ones considering harmonic loads and stat... | Response of a SDOF System with an Inerter-Based Tuned Mass Damper Subjected to Non-stationary Random Excitation | 10.1007/978-3-030-12115-0_27 |
2020-01-01 | A simplified physical model of a high-speed train yaw damper is developed which has the ability to reproduce its dynamic performance with less computational efforts. It is then suitably validated with experimental results considering static and dynamic conditions. At last, comparisons of vehicle dynamics relevant to ve... | A Simplified Yaw Damper Model for Use in Dynamics Simulation | 10.1007/978-3-030-38077-9_69 |
2020-01-01 | Power systems stabilizers (PSSs) have been extensively used as supplementary excitation controllers to damp out the low-frequency oscillations in the range of 0.2–3 Hz. These controllers are able to provide additional damping to enhance the overall system stability. However, conventional PSS (CPSS) performance deterior... | Application of Evolutionary Algorithms to Power System Stabilizer Design | 10.1007/978-3-030-37830-1_2 |
2020-01-01 | The paper presents a study on adaptive vibration control applied in a semi-active vehicle suspension. The simulation-based analysis is dedicated to laboratory tests conducted for an experimental all-terrain vehicle subjected to mechanical exciters emulating road-induced vibration. The implemented simulation environment... | FxLMS Control of an Off-Road Vehicle Model with Magnetorheological Dampers | 10.1007/978-3-030-50936-1_63 |
2020-01-01 | This paper presents the seismic control problem of a broad Liquefied Natural Gas (LNG) storage tank using Sliding Mode Control (SMC) with base isolation technique. To reduce seismic forces, the LNG tank is isolated from base by laminated isolation bearing made from intrinsic rubber. In order to control excessive displa... | Design of Sliding Mode Control for LNG Storage Tank System | 10.1007/978-981-15-0226-2_2 |
2020-01-01 | Most classical substructuring methods yield great approximation accuracy if the underlying system is not damped. One approach is a fixed interface method, the Craig-Bampton method. In contrast, many other methods (e.g., MacNeal method, Rubin method, Craig-Chang method) employ free interface modes, (residual) attachment... | Overview of Free Interface Substructuring Approaches for Systems with Arbitrary Viscous Damping in Dynamic Substructuring | 10.1007/978-3-030-12184-6_11 |
2020-01-01 | In this chapter, the problems of the fifth chapter are fully solved, in detail and step-by-step. In solving the problems of this chapter, all the subjects of the previous chapters are applied. Moreover, the concepts of quality factor, circuit responses, impulse function, time-dependent second-order homogeneous and nonh... | Solutions of Problems: Second-Order and Higher-Order Circuits | 10.1007/978-3-030-50711-4_6 |
2020-01-01 | The measurement and diagnosis of high-voltage cables as part of commissioning tests On-Site is a particular challenge. To circumvent the problems of high reactive power delivery On-Site, resonant testing systems are widely used to perform an AC voltage test. As an alternative for resonance testing, the Damped AC (DAC) ... | Comparative Investigations on Surface Discharge at a Surface Discharge Arrangement Under AC and Damped AC (DAC) | 10.1007/978-3-030-31680-8_111 |
2020-01-01 | In this paper by using the Poincaré compactification of R^3 we make a global analysis of the model x′ = − ax + y + yz, y′ = x − ay + bxz, z′ = cz − bxy. In particular we give the complete description of its dynamics on the infinity sphere. For a + c = 0 or b = 1 this system has invariants. For these values of the param... | On the global dynamics of a three-dimensional forced-damped differential system | 10.1080/14029251.2020.1757232 |
2020-01-01 | This paper presents an adaptive optimal control strategy for an adaptive two-degree-of-freedom quarter car model with magnetorheological dampers. The method assumes the system is fitted with sensors to “read” the road profile ahead of the vehicle. The main objective of the adaptive optimal control is to minimise the ro... | Comfort Improvement of an Adaptive Vehicle Suspension via Pointwise-Constrained Optimal Control | 10.1007/978-3-030-38077-9_200 |
2020-01-01 | Calculation of the time course and speed of the oscillation motion dampened by centripetal force typically represented by sliding friction is rather complicated mathematical task, which is unnecessary to solve repeatedly for individual stages of the given oscillations until they are completely subdued. Using classical ... | Solution of Damped Oscillations by Coulomb Friction at the Karakuri Mechanism Using MAPLE Software | 10.1007/978-3-030-33146-7_44 |
2020-01-01 | In high-speed rotating machinery, the internal damping becomes predominant that further aggravates the appearance of cracks in the rotor due to severe unstable vibrations. The internal damping comes into existence in thick shafts when the fibers of the material are alternately compressed and stretched due to the asynch... | Active Control of Internal Damping Instabilities in a Cracked Rotor with Magnetic Bearing | 10.1007/978-981-15-5693-7_10 |
2020-01-01 | Shutdown System Shutdown system constitutes a part of reactor safety system of Indian Pressurized Heavy Water Reactor (IPHWR). The system is required to be seismically qualified to demonstrate its capability of functioning and maintaining structural integrity during and after a seismic Seismic event. Experimental studi... | Seismic Performance of Shutdown System of Indian Pressurized Heavy Water Reactors | 10.1007/978-981-13-8767-8_70 |
2020-01-01 | This paper introduces the details of a transient damping feature extracting method based on the bridge monitoring data with the aid of the frequency slice wavelet transform (FSWT) which is a time-frequency space analysis tool and its application to damage detection of the bridges. The proposed method via the state repr... | A Damage Detection Method by Transient Damping Feature Based on Monitoring Data | 10.1007/978-981-13-8331-1_3 |
2020-01-01 | Past experience of earthquakes has shown the importance of asymmetry effects on the severity of the damage sustained by structures. In order to mitigate torsional response of asymmetric structures under seismic loads, employing passive energy dissipating equipment, such as viscous dampers, has been investigated by many... | On the Response of Asymmetric Structures Equipped with Viscous Dampers Subjected to Simultaneous Translational and Torsional Ground Motion | 10.1007/978-3-030-33532-8_28 |
2020-01-01 | This study investigates the effect of a tool holder with a metallic damping alloy on both vibration reduction and surface finish improvement for use in an end-milling process. Two different configurations of damping alloys are designed: a collet and a sleeve inside a conventional tool holder. To determine the system ch... | Surface finish improvement using a damping-alloy sleeve-insert tool holder in the end milling process | 10.1007/s00170-019-04757-0 |
2020-01-01 | In order to study the phenomenon of sub-synchronous oscillation (SS0) in thermal power plants considering different topologies, based on the IEEE first standard model, this paper uses the PSCAD simulation platform to build models of different topological structures of thermal power plants. The complex torque coefficien... | Research on SSO Influence with Consideration of Topology Structure Based on CTC Analysis Method | 10.1007/978-3-030-62483-5_2 |
2020-01-01 | This article proposes a method of selecting the damping factor (DF) based on finding the boundaries of the range of the domain of the DF for a model of effective controls, reflecting the spread of influence on the directed weighted signed graphs. The graph model is a fuzzy cognitive map (FCM). Two ranges of the subset ... | Effect of Resonance in the Effective Control Model Based on the Spread of Influence on Directed Weighted Signed Graphs | 10.1007/978-3-030-50097-9_28 |
2020-01-01 | The paper discusses the classical methods of surface damping of bending vibrations in thin-walled structures. Furthermore, the perspective integral version of a damping coating has been proposed. Such coating consists of two layers of material with pronounced viscoelastic properties with a thin reinforcing layer of hig... | Vibration of the Plate with Integral Layer Damping: Experimental and Theoretical Studies | 10.1007/978-3-030-47883-4_46 |
2020-01-01 | Daily increase in plastic waste amounts is a serious environmental problem and it is among the major challenges worldwide. Reusing this waste material can be therefore an appropriate solution to overcome this problem. Besides, recycling plastic waste as reinforcing material has become a cheap and viable alternative for... | Shaking Table Study on PET Strips-Sand Mixtures Using Laminar Box Modelling | 10.1007/s10706-019-01057-y |
2020-01-01 | Abstract This paper considers a possible approach to the embodiment of a gantry crane motion control while moving cargo. Two different methods for determining the controlling acceleration that provides vibration damping of the cargo are proposed. The first method is based on the application of the classical Pontryagin ... | Motion Control of a Loaded Gantry Crane by Prescribing Its Acceleration | 10.1134/S1063454120010100 |
2020-01-01 | Dynamic Mechanical Analysis is carried out on treated and untreated kenaf, thespesia lampas and okra fiber polyester composites. Results indicate that composites with fibers treated by sodium hydroxide have higher storage modulus, decreased loss modulus and damping factor Best properties are noted for treated okra fibe... | Dynamic Mechanical Properties of Kenaf, Thespesia Lampas and Okra Fiber Polyester Composites | 10.1007/978-3-030-43690-2_52 |
2020-01-01 | The importance of placing the piezoelectric patch at the optimal location for getting the maximum vibration control using the shunt circuit technique is discussed here. A shunt circuit damper converts the mechanical vibration to the electrical energy, which is then dissipated as heat using resistors. The energy dissipa... | Optimal Location of Piezoelectric Patch in Passive Vibration Control | 10.1007/978-981-15-5693-7_40 |
2020-01-01 | In maximizing the power transmission from solar electricity to the grid, the use of power converters is very essential. In the early days, the problems in terms of power quality (PQ) have meant that both the voltage quality and current quality of the PV system linked to the grid are becoming increasingly crucial, parti... | Design and Analysis of PV-Based DSTATCOM with LCL Filter for Localized Distribution System | 10.1007/978-981-15-2256-7_35 |
2020-01-01 | Lanzhou–Xinjiang high-speed railway has passed through several wind areas, and it is necessary to study pantograph–catenary coupling under wind environment. In this paper, SS400 + pantograph used in Lanzhou–Xinjiang line is utilized to study the pantograph–catenary parameter matching. Firstly, the sliding vibration law... | Optimal Matching of High-Speed Pantograph Parameters Considering Catenary Suspension Irregular Point and Wind Damping | 10.1007/978-981-15-2862-0_51 |
2020-01-01 | The body vibration damping process with a dynamic shock vibration damper containing a system of successive shock pairs in which the colliding elements are magnets is considered. The projected parameters’ effect of the vibration damper on the body oscillations is considered. The features of setting up the system in the ... | Damping of Oscillations by a Vibro-Impact System with Serial Magnetic Impact Pairs | 10.1007/978-3-030-38708-2_25 |
2020-01-01 | Numerical wave tanks are widely-acknowledged tools in studying waves and wave-structure interactions. They can generate waves under realistic scales and offers more information on the fluid field. However, most numerical wave tanks suffer from issues known as the numerical dissipation and numerical dispersion. The form... | A simple method of depressing numerical dissipation effects during wave simulation within the Euler model | 10.1007/s13131-019-1524-1 |
2020-01-01 | The article compares robustness of five selected speed control systems to the changes in the controlled plant, which is a two mass system with backlash introduced between the motor and the linking shaft. Authors propose a test procedure which will take into account typical dynamical and steady states occurring in elect... | Comparison of Robustness of Selected Speed Control Systems Applied for Two Mass System with Backlash | 10.1007/978-3-030-50936-1_114 |
2020-01-01 | The paper is concerned with a laboratory study on wave damping efficiency of structures of this type, needed for their functional design. Systematic test series of dikes without and with piles were carried out to evaluate wave energy dissipations by the porous base and rows of piles are evaluated separately so that the... | Wave Damping Efficiency of Porous Piled Dikes on a Mangrove Foreshore | 10.1007/978-981-15-0291-0_118 |
2020-01-01 | The frequency response analysis (FRA) is a known highly sensitive method to detect mechanical and electrical defects in power transformers. Investigations already showed, that this technique is applicable to detect broken windings or shorted turns in rotor and stator of rotating machines. Here, the applicability of FRA... | Reliable Diagnostics on Rotating Machines Using FRA | 10.1007/978-3-030-31676-1_70 |
2020-01-01 | We focus this study on the dynamics of a Rubber-Layer Roller Bearing (RLRB) for vibrational base isolation. By exploiting viscoelastic friction arising from rigid cylinders rolling on concave rigid plates padded with rubber layers, the device is able to provide a nonlinear damping behavior. Specifically, we consider th... | Rubber-Layer Roller Bearings (RLRB) for Base Isolation: The Non-linear Dynamic Behavior | 10.1007/978-3-030-41057-5_109 |
2020-01-01 | The hybrid solution of natural-synthetic fibres can be an effective option to enhance the moisture resistance of natural fibre reinforced polymer composites. This work aims at studying the effect of long-term water immersion of hybrid composites on their mechanical and damping properties. These properties were investig... | Long-term Immersion in Water of Flax-glass Fibre Hybrid Composites: Effect of Stacking Sequence on the Mechanical and Damping Properties | 10.1007/s12221-020-9494-7 |
2020-01-01 | This paper experimentally investigates the static and dynamic properties of polypropylene fiber reinforced concrete (PPFRC). And also, the main objective of this present study is to examine the dynamic behavior of damaged and undamaged PPFRC beams in free-free constraints. The static properties have been carried out by... | Experimental Modal Analysis of Polypropylene Fiber Reinforced Concrete | 10.1007/978-981-13-9008-1_42 |
2020-01-01 | A key aspect of the seismic performance of bridges is the energy dissipation mechanism. The most usual mechanisms are the formation of plastic hinges in the piers, seismic isolation, and the addition of supplemental damping devices (such as hydraulic or hysteretic dampers). The present study assesses the feasibility of... | Alternative solutions for supplemental energy dissipation in bridges | 10.1007/s10518-019-00733-x |
2020-01-01 | This paper focus on the nature of a high-damping soft elastic material based on Eucommia ulmoides gum (EUG) obtained by epoxidation of EUG first and then in situ reaction between epoxy group and sodium bisulfite. The influence of degree of modification ( M mol%) and degree of sulfonation ( S mol%) of the product sulfon... | Preparation of high-damping soft elastomer based on Eucommia ulmoides gum | 10.1007/s00289-019-02723-0 |
2020-01-01 | Tuned liquid column dampers (TLCDs) have an extensive usage as effective vibration absorbers to enhance the structure response under the effect of seismic or wind loads. In this study, parameter optimization of nonlinear model of a TLCD in frequency domain under harmonic excitation is proposed in order to improve the p... | Frequency Domain Nonlinear Modeling and Analysis of Liquid-Filled Column Dampers | 10.1007/978-3-030-34747-5_5 |
2020-01-01 | The aim of the study is to demonstrate a couple of special states which can be encountered at the system of a ball moving in a spherical cavity working as a passive tuned mass damper (TMD) of slender engineering structures. The system includes six degrees of freedom with three non-holonomic constraints being under hori... | Stable and unstable solutions in auto-parametric resonance zone of a non-holonomic system | 10.1007/s11071-019-04948-0 |
2020-01-01 | The implementation, operation and efficacy of semi-active (SA) structural control systems based on the adoption of magnetorheological (MR) devices are still object of research. For a such system, generally a complex electronic equipment is required to acquire then elaborate then generate signals to properly command the... | Use, Effectiveness and Long Term Reliability of MR Dampers for Seismic Protection of Framed Structures | 10.1007/978-3-030-41057-5_143 |
2020-01-01 | In this paper a model-based method for estimating the damper excitations and velocity amplitudes by means of synthetic road irregularities are shown. They are based on a stationary white noise process with power density 1. With two 1^st order filters it is possible to generate realistic synthetic road irregularities wh... | Model-Based Estimation of Damper Excitations and Velocities Due to Road Surface Irregularities with Focus on Ride Comfort | 10.1007/978-3-030-38077-9_202 |
2020-01-01 | Natural hazards like landslides, tsunami, earthquake, cyclone and volcanic eruption are most rigorous natural hazards in the environment that causes damage to structures. These natural calamities produce a potent remembrance because of heavy damage to the environment. Accordingly, a structural engineer faces a challeng... | Robust Controller for Seismic Response Mitigation | 10.1007/978-981-15-4676-1_12 |
2020-01-01 | This paper discusses averaging and vibrational control of mechanical control-affine systems with piecewise linear damping and high-frequency inputs. The results are used for dynamic analysis and vibrational control of a three-degree-of-freedom, planar, horizontal pendulum. The system has non-symmetric, linear viscous d... | Vibrational control of mechanical systems with piecewise linear damping and high-frequency inputs | 10.1007/s11071-019-05361-3 |
2020-01-01 | Abstract Outbreaks of individual species populations are important phenomena in many aspects and are not alike in terms of the theory of multispecies community dynamics. Outbreaks of insect populations develop more quickly with long-lasting effects experienced by the forest industry. These events are considered as extr... | A Continuous Model for Oscillating Outbreaks of the Population of a Phytophagous Moth, the Tent Caterpillar, Malacosoma disstria (Lepidoptera, Lasiocampidae) | 10.1134/S0006350920010169 |
2020-01-01 | The present work investigates the effectiveness of Magnetorheological Damper (MR) damper coupled with the smart self-powered system, MR damper acts as electromagnetic induction (EMI) device in controlling seismic vibration. The proposed smart damping system with an EMI device is capable of converting vibration energy i... | Experimental Investigation of a Self-powered Magnetorheological Damper for Seismic Mitigation | 10.1007/978-981-15-0802-8_61 |
2020-01-01 | An innovative application of a new corrugated steel plate damper (CSPD) in steel arch bridges is proposed to enhance their seismic performance. The mechanical properties of the CSPD were investigated by static and quasi-static parametric analysis using ABAQUS software, and validation of the CSPD finite element models w... | The Mechanical Properties of a New Corrugated Steel Plate Damper and Its Application in a Steel Arch Bridge | 10.1007/s12205-020-0888-2 |
2020-01-01 | In this paper, a Proportional Integral Derivative (PID) controller is designed to mitigate the vibration response of the structure. The simulation is done for three degrees of freedom system under different earthquakes using MATLAB and Simulink. Different earthquakes are considered to find the capability of the control... | Classical PID Controller for Semi-active Vibration Control of Seismically Excited Structure Using Magneto-Rheological Damper | 10.1007/978-981-13-9213-9_19 |
2020-01-01 | We consider the damped wave equation with the energy critical power type nonlinearity. It is known that the global solution with a finite space-time norm decays to 0 as time goes to infinity. In the present paper, we give the asymptotic order that the solution goes to a solution of the linear heat equation. | Remark on Asymptotic Order for the Energy Critical Nonlinear Damped Wave Equation to the Linear Heat Equation via the Strichartz Estimates | 10.1007/978-3-030-58215-9_10 |
2020-01-01 | Chapter 8 is dedicated to the topic of controlled and uncontrolled responses to trauma, that is, wound healing and polytrauma, a topic that has been experiencing a paradigm change of medical thinking during the past 15 years. At first, the DAMP-promoted wound healing process as a classical homeostatic defensive functio... | DAMP-Controlled and Uncontrolled Responses to Trauma: Wound Healing and Polytrauma | 10.1007/978-3-030-53868-2_8 |
2020-01-01 | This paper presents the neuro-fuzzy modeling approach to analyze the test results of MR damper. Every Electric current in provides to MR Fluid will have a different output. On the other hand, the meandering type valve has a different output and calculation. Therefore, the prototype of MR Damper that has been made was t... | Neuro-fuzzy Hysteresis Modeling of Magnetorheological Dampers | 10.1007/978-981-15-4481-1_59 |
2020-01-01 | Abstract Ribosomal genes encode ribosomal RNA (rRNA), which is an integral part of ribosomes. The main function of ribosomal genes in the cell is the synthesis of rRNA. However, ribosomal genes can also perform other functions in the body. It was found that DNA of ribosomal genes (rDNA) is an active biomolecule, which ... | Noncanonical Functions of the Human Ribosomal Repeat | 10.1134/S1022795420010044 |
2020-01-01 | Under-platform damper is used to attenuate resonant response and further prevent high cycle fatigue failure of turbine blades. The aim of this work is to improve the representation of contact interfaces in modeling an asymmetrical under-platform damper. A new reduced-order contact model with a lumped parameter form is ... | Reduced-Order Modeling Friction for Line Contact in a Turbine Blade Damper System | 10.1007/978-3-030-34747-5_20 |
2020-01-01 | Multiple pantograph operation is an unfavourable condition for current collection, since the trailing pantograph is subjected to high vibrations and elevated contact force variations, due to the perturbation induced on the overhead line by the leading pantograph. In a previous work it was shown that a diversification o... | Semi-active Dampers for Multiple Pantograph Operation | 10.1007/978-3-030-38077-9_27 |
2020-01-01 | The influence of the nonlinearity of pendulum-tuned mass dampers (PTMD) on vibration control of H-section hangers was studied analytically. Firstly, the coupled system of a slender H-section hanger and an attached PTMD was simplified to a two-degree-of-freedom (2-DOF) system. The equations of motion were derived for th... | Nonlinear Behavior of Pendulum-Tuned Mass Dampers for Vibration Control of H-Section Hangers | 10.1007/978-3-030-34747-5_7 |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.