Vibration Isolation Characteristics Analysis of X-shaped Quasi-Zero Stiffness Vibration Isolator

被引：5
|
作者：
Yao G. [1 ]
Yu Y.-H. [1 ]
Zhang Y.-M. [2 ]
Wu Z.-H. [1 ]
机构：
[1] School of Mechanical Engineering & Automation, Northeastern University, Shenyang
[2] Equipment Reliability Institute, Shenyang University of Chemical Technology, Shenyang
来源：
Dongbei Daxue Xuebao/Journal of Northeastern University | 2020年 / 41卷 / 05期
关键词：
Equivalent reduced stiffness; Incremental harmonic balance method (IHB); Quasi-zero stiffness(QZS); Transmissibility; Vibration isolator; X-shaped structure;
D O I：
10.12068/j.issn.1005-3026.2020.05.009
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
An X-shaped structure is applied to quasi-zero stiffness isolator to improve its low frequency isolation performance. The dynamic equation of the system is established by using the Newton's motion law. The amplitude-frequency response curves of the system are obtained by using the incremental harmonic balance method. The effect of equivalent reduced stiffness γ on system transmissibility is discussed. Research results show that the reasonable numerical interval of dimensionless pre-compression length of horizontal spring is (0, 2). In the resonant region, the increase of γ can significantly reduce the force transmissibility. At higher excitation frequencies, the effect of the change of γ on the vibration isolation performance of the system is weak. With the decrease of γ, the displacement transmissibility in the resonance region decreases sharply. In addition, the decrease of γ will also reduce the resonance frequency and make the jump phenomenon disappear. Therefore, the equivalent reduced stiffness γ of the X-shaped quasi-zero stiffness isolator is an ideal parameter which can effectively reflect the effect of low-frequency vibration isolation of the system. The effect of equivalent reduced stiffness γ is discussed in detail. © 2020, Editorial Department of Journal of Northeastern University. All right reserved.
引用
收藏
页码：662 / 666
页数：4
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