A nonlinear vibration isolator achieving high-static-low-dynamic stiffness and tunable anti-resonance frequency band

被引：127
作者：
Sun, Xiuting [1 ,2 ,3 ]
Jing, Xingjian [2 ,3 ]
机构：
[1] Univ Shanghai Sci & Technol, Sch Mech Engn, Shanghai, Peoples R China
[2] Hong Kong Polytech Univ, Dept Mech Engn, Hong Kong, Hong Kong, Peoples R China
[3] Hong Kong Polytech Univ, Shenzhen Res Inst, Shenzhen, Peoples R China
来源：
MECHANICAL SYSTEMS AND SIGNAL PROCESSING | 2016年 / 80卷
关键词：
Vibration isolation; Nonlinear stiffness and damping; Structural nonlinearity; Anti-resonance; QUASI-ZERO-STIFFNESS; ISOLATION SYSTEM; SEAT SUSPENSION;
D O I：
10.1016/j.ymssp.2016.04.011
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
This study investigates theoretically and experimentally a vibration isolator constructed by an n-layer Scissor-Like Structure (SLS), focusing on the analysis and design of nonlinear stiffness and damping characteristics for advantageous isolation performance in both orthogonal directions. With the mathematical modeling, the influence incurred by different structural parameters on system isolation performance is studied. It is shown that, (a) nonlinear high-static-low-dynamic stiffness and damping characteristics can be seen such that the system can achieve good isolation performance in both directions, (b) an anti-resonance frequency band exists due to the coupling effect between the linear and nonlinear stiffness in the two orthogonal directions within the structure, and (c) all these performances are designable with several structural parameters. The advantages of the proposed system are shown through comparisons with an existing quasi-zero-stiffness vibration isolator (QZS-VI) and a traditional mass-spring-damper vibration isolator (MSD-VI), and further validated by experimental results. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：166 / 188
页数：23
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