基于ESO法的九宫板阻尼结构的优化设计方法

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Abstract Topological optimization design for 3*3 grid stiffened panel was conducted using Evolutionary Structural Optimization method (ESO) with the amount of constrained damping layers as the constraint condition, and the maximization of loss factor of modality as the target function. The optimization was completed using a self-coded C program based on ESO method, which can call ABAQUS software to model the structure. The results showed that the modal damping loss factor of compound 3*3 grid stiffened panel remains unchanged firstly, , then it gradually decrease after increasing to the maximum value.The normalization first modal loss factor of the 3*3 grid stiffened panel with additional damping layers become bigger and bigger when the removal ratio increases, showing that the additional damping layers in the middle portion of the 3*3 grid stiffened panel contributes much to the suppressing vibration performance the structure. Mises stress distributed contour and the Maximum Mises stress value of this structure with 0% ,50%,100% volume amount of constrained damping layer are compared in order to study optimal layout impact on the 3*3 grid stiffened panel in resonance conditions. The results show that the optimal layout with 50% volume amount of constrained damping layer has little effect on the Mises stress distribution but the maximum Mises stress value decreases obviously. The method are used in optimization design of genergy complex structure to reach the aims of sacrificing little damping value with less mass, which can be widely used in optimization design of general damping structures, and has strong practicability.

Key words： Topological optimization Sensitivity analysis Constraint damping structure

Received: 08 June 2015 Published: 15 November 2016

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	Articles by authors
	LIU Shuang-yan
	LI Yu-long
	DENG Qiong
	XU Yi-hang

Cite this article:

LIU Shuang-yan,LI Yu-long,DENG Qiong, et al. Study on topological optimization design of 3*3 grid stiffened panel with additional damping layers based on evolutionary structural optimization[J]. JOURNAL OF VIBRATION AND SHOCK, 2016, 35(22): 197-203.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2016/V35/I22/197

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