Study on Mechanical Properties of A Periodic Structure Vibration Isolator

ZHU Dongmei, FAN Zhanbei, LIU Haiping, LIU Guoyong


A small volume and high stiffness periodic metal isolator composed of elastic plates and supporting columns is designed. Firstly,  the static load test is carried out by using microcomputer controlled electronic testing machine,  and the load-displacement characteristic curve is obtained. Based on the finite element method,  a finite element model of periodic structure is established,  and the static analysis is carried out under the same working conditions as the test. On this basis,  the influence of the main dimension parameters on the stiffness is studied. The results show that the thickness of elastic sheet has great influence on the stiffness,  while the inner diameter and the number of layers have little influence on the stiffness. Finally,  by using the equivalent spring-mass model of the periodic structure isolator with multiple degrees of freedom,  its dynamic equation is established by means of modal superposition method,  and the expression of force transfer rate is deduced. A simulation is carried out based on the finite element analysis which is verified by experiment. The results show that the theory and simulation match well. When the load mass exceeds a certain value,  the periodic structure can be simplified to single degree of freedom.



Keywords:  small volume and high stiffness,   periodic structure,   isolators,   dynamic response

Full Text:



WILKE P S, JOHNSON C D, GROSSERODE P, et al. Whole - spacecraft vibration isolation for broadband attenuation [C] // Aerospace Conference. Big Sky, MT, USA:IEEE, 2000:315—321.

JOHNSON C D, WILKE P S, PENDLETON S C. Three -axis, six t passive vibration isolation system:34205417 [P]. 2002-07-26.

JOHNSON C D, WILKE P S, DARLING K R. Multi -axis whole- spacecraft vibration isolation for small launch vehicles [C] // Smart Structures and Materials 2001. SPIE, 2001:162-174.

SHU L H, HU Z C, LI Z Q. Research progress of vibration isolators for foreign ships [J]. Ship Science and Technology, 2006 (3):109— 112. (In Chinese)

SHEN J P. Dynamic characteristics analysis of multi-plate vibration isolation structure [D]. Harbin:School of Mechanical and Electrical Engineering, Harbin Engineering University, 2015:12—13. (In Chinese)

YAN L T, LI H, DING Y, et al. Design and experimental research of the whole satellite impact reduction device[J]. Journal of Vibration and Shock, 2017, 36(14):138-141, 173.(In Chinese)

NING R H, ZHU S J, WENG X T, et al. Study on bending vibration characteristics of finite period structural beams [J]. Journal of Wuhan University of Technology, 2018, 42(4):686—690.(In Chinese)

RAJAN P, ABHIJIT S. Broadband vibration isolation for rods and beams using periodic structure theory [J]. Journal of Applied Mechanics, 2019, 86(2):021004.

ZOU G P, LIU Z, CHANG Z L, et al. Experimental study on vibration performance of wire mesh rubber isolator [J]. Ordnance Material Science and Engineering, 2015 (5):4—8.(In Chinese)

LIU Y W, SHANG D J, CAO P Z, et al. A metal vibration isolator supporting an underwater sound barrier:201610363781.X [P]. 2016-08-10.(In Chinese)

ZHAGN Y H. Modeling and load characteristics of metal spring isolator [D]. Chengdu:School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, 2017:1—20.(In Chinese)

LIU Z, CHEN H, WANG G S. Analysis of impact acceleration response of wire mesh rubber isolator [J]. Noise and Vibration Control, 2018, 38(2):208—211.(In Chinese)

GAO S Y, SHEN H M. Mechanics of vibration [M]. Beijing:China Railway Publishing House, 2016:23—24.(In Chinese)


  • There are currently no refbacks.