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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 19    Special 3    December 2009

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A new variable stiffness absorber based on magneto-rheological elastomer
DONG Xiao-min(董小闵)1, YU Miao(余 淼)2, LIAO Chang-rong(廖昌荣)2, CHEN Wei-min(陈伟民)2

1. State Key Laboratory of Mechanic Transmission, Chongqing University, Chongqing 400044, China;
2. College of Opto-Electronic Engineering, Key Lab of Opto-Electronic Technology and System of Education Ministry, Chongqing University, Chongqing 400044, China

Abstract:A new adaptive variable stiffness absorber was proposed based on a smart material, magnetorheological elastomer (MRE), and its vibration control performance was investigated. Before developing the proposed absorber, the MREs were firstly fabricated by curing a mixture of 704 silicon rubber, carbonyl iron particles and a small amount of silicone oil under an external magnetic field. Then the mechanical properties of the fabricated MREs were measured. On the basis of the measured mechanical characteristics, the MRE absorber was developed and its working characteristics were also tested under various input currents and excited frequencies. Finally, the control responses of a two-degree-of-freedom dynamic system with a MRE absorber were presented under a chirp input and used to evaluate the effectiveness of the MRE absorber.

 

Key words: magneto-rheological elastomer; variable stiffness; absorber

ISSN 1672-7029
CN 43-1423/U

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