非平稳激励下薄板结构减振附加阻尼层的拓扑优化

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Abstract This paper investigates the optimal distribution of damping material on thin-plate structures under non-stationary stochastic excitation.In the topology optimization model, the relative densities of the damping material were taken as design variables, and the design objective is to minimize the structural displacement variances at specified positions under a given volume constraint of damping material.Since the structure was subjected to non-stationary stochastic force, the stochastic responses were solved rapidly based on an explicit time domain method (ETDM).The analysis of the displacement variance sensitivity was implemented by using the ETDM based on an adjoint variable method.Then the topology optimization problem was solved with an optimal criteria (OC) method.Numerical examples illustrate the feasibility and effectiveness of the proposed method for vibration attenuation of structures through dynamic topology optimization of damping layer under non-stationary stochastic excitation.

Key words： non-stationary stochastic excitations thin plate structures added damping layer vibration attenuation topology optimization

Received: 27 September 2018 Published: 15 April 2020

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	Articles by authors
	LI Xueping
	LIN Mengfeng
	WEI Peng
	SU Cheng

Cite this article:

LI Xueping,LIN Mengfeng,WEI Peng, et al. Topology optimization of attached damping layers on thin plate structures for vibration attenuation under non-stationary stochastic excitations[J]. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(8): 250-257.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2020/V39/I8/250

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