期刊
JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES
卷 26, 期 10, 页码 1290-1300出版社
SAGE PUBLICATIONS LTD
DOI: 10.1177/1045389X14541492
关键词
Magnetorheological elastomer; shifting frequency; mixed mode
资金
- National Natural Science Foundation of China [61203098]
- National Science-Technology Support Plan [2012BAF06B04]
- Fundamental Research Funds for the Central Universities [CDJZR11128801, CDJZR120018, CDJZR13120090]
A new magnetorheological elastomer isolator in shear-compression mixed mode is designed in this article. Two pieces of magnetorheological elastomer fabricated with different dimensions are utilized in the isolator. One magnetorheological elastomer operates on shear mode, and the other operates on compression mode. Next, a finite element method magnetic package is used to analyze the designed magnetic circuit system, and a test system is established to obtain the frequency response of magnetorheological elastomer isolator with mixed mode. It is found that the natural frequency of magnetorheological elastomer isolator changes greatly with variable current applied, and the amplitude of vibration is attenuated widely. Compared with the natural frequency of 0A, the increment of natural frequency is up to 103% with applied current reaches to 1.5A. Finally, the dynamic model of isolator system is established, and the stiffness and damping coefficients of magnetorheological elastomer isolator are identified by the experimental method. Meanwhile, the variable range for stiffness and damping of magnetorheological elastomer isolator with mixed mode is greater than that of single mode, which has been proved in theory and experiments.
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