Electromagnetic shunt damping for shock isolation of nonlinear vibration isolators

2020 ◽  
Vol 479 ◽  
pp. 115370 ◽  
Author(s):  
Bo Yan ◽  
Hongye Ma ◽  
Lu Zhang ◽  
Chuanyu Wu ◽  
Xinong Zhang
Keyword(s):  
Nonlinear Vibration ◽  
Vibration Isolators ◽  
Shunt Damping ◽  
Shock Isolation

Nonlinear Electromagnetic Shunt Damping for Nonlinear Vibration Isolators

2019 ◽  
Vol 24 (4) ◽  
pp. 1851-1860 ◽  
Author(s):  
Bo Yan ◽  
Hongye Ma ◽  
Wenguang Zheng ◽  
Bin Jian ◽  
Ke Wang ◽  
...  
Keyword(s):  
Nonlinear Vibration ◽  
Vibration Isolators ◽  
Shunt Damping

Shock isolation characteristics of a bistable vibration isolator with tunable magnetic controlled stiffness

2021 ◽  
pp. 1-28
Author(s):  
Bo Yan ◽  
Peng Ling ◽  
Yanlin Zhou ◽  
Chuan-yu Wu ◽  
Wen-Ming Zhang
Keyword(s):  
Damping Ratio ◽  
Excitation Amplitude ◽  
Relative Displacement ◽  
Vibration Isolator ◽  
Maximum Acceleration ◽  
Vibration Isolators ◽  
Displacement Ratio ◽  
Shock Isolation ◽  
Maximum Relative Displacement ◽  
Isolation Performance

Abstract This paper investigates the shock isolation characteristics of an electromagnetic bistable vibration isolator (BVI) with tunable magnetic controlled stiffness. The theoretical model of the BVI is established. The maximum acceleration ratio (MAR), maximum absolute displacement ratio (MADR) and maximum relative displacement ratio (MRDR) are introduced to evaluate the shock isolation performance of the BVI. The kinetic and potential energy are observed to further explore the performance of the BVI. The effects of the potential barrier, shape of potential well, damping ratio on the BVI are discussed compared to the linear vibration isolators (LVI). The results demonstrate that the intrawell oscillations and snap-through oscillations are determined by the excitation amplitude and duration time of main pulse. MADR and MRDR of the BVI are smaller than those of the LVI. The maximum acceleration peak amplitude of the BVI is far below that of the LVI, especially when the snap-through oscillation occurs. In brief, the proposed BVI has a better shock isolation performance than the LVI and has the potential to suppress the shock of space structures during the launch and on-orbit deploying process.

Dynamic Analysis of Nonlinear Vibration Isolation System Based on Flexible Foundation

2014 ◽  
Vol 1030-1032 ◽  
pp. 766-769
Author(s):  
Shu Ying Li ◽  
Rui Huo ◽  
Xing Ke Cui ◽  
Cui Ping Liu ◽  
Dao Kun Zhang
Keyword(s):  
Nonlinear Vibration ◽  
Power Flow ◽  
Vibration Isolation ◽  
Low Frequency ◽  
Coupled System ◽  
Optimized Design ◽  
Isolation System ◽  
Vibration Isolation System ◽  
Vibration Isolators ◽  
Flexible Foundation

In this paper,a general dynamic model of the isolation coupled system which is composed of isolation object,nonlinear vibration isolation support,and flexible foundation is established,calculated method of applying vibration power flow to analyze isolation effectiveness is studied.Further more,as an calculation example,a air spring vibration isolation system of HS-700 engines is numerically simulated.Designs several low-frequency nonlinear vibration isolators and analyzes its vibration isolation effect.It discusses the effect of the vibration isolator parameters on the transmitted power flow of the system.The results provide a theoretical basis for the optimized design of nonlinear vibration isolation system.

On the Displacement Transmissibility of a Base Excited Viscously Damped Nonlinear Vibration Isolator

2009 ◽  
Vol 131 (5) ◽  
Author(s):  
Zarko Milovanovic ◽  
Ivana Kovacic ◽  
Michael J. Brennan
Keyword(s):  
Nonlinear Systems ◽  
Nonlinear Vibration ◽  
Performance Characteristics ◽  
Vibration Isolator ◽  
Base Excitation ◽  
Vibration Isolators ◽  
System Parameters ◽  
Beneficial Effects ◽  
Absolute Displacement ◽  
Stiffness And Damping

In this article vibration isolators having linear and cubic nonlinearities in stiffness and damping terms are considered under base excitation. The influence of the system parameters on the relative and absolute displacement transmissibility is investigated. The performance characteristics of the nonlinear isolators are evaluated and compared with the performance characteristics of the linear isolators to highlight the beneficial effects in the nonlinear systems considered.

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