含负刚度器件的Maxwell模型动力吸振器的参数优化

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Abstract The maxwell model of the viscoelastic material was applied to a dynamic vibration absorber (DVA) system to form a Maxwell model dynamic vibration absorber with negative stiffness spring,and the parameters of the model were optimized. At first,the analytical system solution was obtained based on the established motion differential equation. Then,three fixed points were found in the amplitude-frequency curves of the primary system. The design formulae for the optimal tuning ratio of the DVA were obtained by adjusting the three fixed points to the same height according to the fixed-point theory. According to the characteristics of negative stiffness elements,the optimal negative stiffness ratio was obtained and it could keep the system stable. The optimal damping ratio was obtained by minimizing the maximum value of the amplitude frequency curves. At last,the comparisons of the presented DVA with three other traditional DVAs under the harmonic and random excitations show that the presented DVA in this paper performs better in vibration absorption.

Key words： dynamic vibration absorber negative stiffness fixed-point theory parameter optimization

Received: 08 August 2017 Published: 15 February 2019

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	Articles by authors
	HAO Yan
	SHEN Yongjun
	YANG Shaopu
	XING Haijun

Cite this article:

HAO Yan,SHEN Yongjun,YANG Shaopu, et al. Parameter optimization of a maxwell model dynamic vibration absorber with negative stiffness[J]. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(4): 20-25.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2019/V38/I4/20

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