A study on a temperature and frequency dependent rubber constitutive model and vibration performance of a shock absorber

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (16) : 256-262.

DUAN Chenghong1, WANG Fujun1, LUO Xiangpeng1, LIU Jing2

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Abstract

With the rapid development of China's aerospace industry, all kinds of electronic equipment such as specialized electronic communication devices are widely used in spacecraft. Due to the severe vibrations during launch process and the various impacts and pressure changes that may occur in space, the vibration issue of such electronic devices requires special attention, and rubber shock absorbers are commonly used for vibration reduction. For rubber shock absorber, firstly, the frequency dependence and temperature dependence of rubber materials are considered, a modified six-parameter fractional derivative model was derived. Secondly, a sine sweep test and random vibration test were carried out on electronic devices equipped with rubber shock absorber. Thirdly, the finite element analysis of the structure was conducted, and the finite element analysis results were compared with the test results. Finally, the damping performance at different temperatures was predicted by finite element analysis. The results show that the modified six-parameter fractional derivative model provides a good representation of vibration performance of rubber. Additionally, the rubber shock absorber exhibits good damping performance. However, the damping effectiveness decreases as the temperature decreases.

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rubber constitutive model / frequency and temperature / vibration / finite element analysis

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DUAN Chenghong1, WANG Fujun1, LUO Xiangpeng1, LIU Jing2. A study on a temperature and frequency dependent rubber constitutive model and vibration performance of a shock absorber[J]. Journal of Vibration and Shock, 2024, 43(16): 256-262

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