0
research-article

Theoretical analysis and experimental identification of a vibration isolator with widely-variable stiffness

[+] Author and Article Information
Zhan Hu

School of Aerospace Engineering, Tsinghua University, Beijing 100084, China
huzhan1029@163.com

Xing Wang

Department of Mechanical Engineering, University of Bristol, Bristol BS81TR, UK; School of Aerospace Engineering, Tsinghua University, Beijing 100084, China
wangxingbuaa@163.com

Hongxiang Yao

School of Aerospace Engineering, Tsinghua University, Beijing 100084, China
yaohongxiang543@sina.com

Guangyuan Wang

Beijing Institute of Spacecraft System Engineering, Beijing 100094, China
zhuichilun@126.com

Gangtie Zheng

School of Aerospace Engineering, Tsinghua University, Beijing 100084, China
gtzheng@tsinghua.edu.cn

1Corresponding author.

ASME doi:10.1115/1.4039537 History: Received November 28, 2017; Revised February 21, 2018

Abstract

This paper develops an adjustable high-static-low-dynamic (AHSLD) vibration isolator with a widely-variable stiffness. By adjusting deformations of its horizontal springs, the natural frequency of the isolator can be substantially changed starting from a quasi-zero value. In this paper, the nonlinear static and dynamic analysis of the AHSLD isolator are presented. Effects of horizontal adjustments on the variation range of the stiffness and nonlinear dynamic characteristics are investigated. Good performance of the stiffness variation is validated by free-vibration tests. The wide-range variable stiffness from 0.33 N/mm to 23.2 N/mm is achieved in tests, which changes the natural frequency of the isolator from an ultra-low value of 0.72 Hz to 5.99 Hz. Besides, its nonlinear dynamic characteristics are also experimentally identified by applying the Hilbert transform. Both analytical and experimental results demonstrate the weakly-hardening nonlinearity in the tested AHSLD isolator, which will not degrade its performance in practical applications.

Copyright (c) 2018 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In