基于频响函数综合的舱筏隔振系统灵敏度分析和优化＊

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振动与冲击 ›› 2011, Vol. 30 ›› Issue (5) : 145-151.

论文

基于频响函数综合的舱筏隔振系统灵敏度分析和优化＊

黄修长; 徐时吟; 张志谊; 华宏星

作者信息 +

Design sensitivity analysis and optimization of a floating raft system using an FRF-based substructuring method

Huang Xiu-chang;Xu Shi-yin;Zhang Zhi-yi;Hua Hong-Xing

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摘要

摘要：利用频响函数综合方法，推导了浮筏隔振系统连接点的位移，给出基座上的力和输入到基座的功率流对浮筏隔振系统的上、下层隔振器的刚度和阻尼的设计灵敏度表达式，并分别以最小化某一频段内输入到基座的功率流和传递到基座的力的均方值为优化目标，结合灵敏度分析方法，对上、下层隔振器的刚度进行了优化。优化结果表明，基于子结构灵敏度分析的方法是一种有效的优化方法，以最小化传递到基座的力的均方值为优化目标得到的隔振器的最优刚度不能同时使输入到基座的功率流有很大的衰减。

Abstract

Abstract: A general method for the design sensitivity analysis of forces on and power transmission to the base in a typical floating raft system is presented using the FRF-based substructuring formulation. The proposed method gives an expression of design sensitivity in terms of the partial derivatives of the physical parameters of upper and lower isolators as well as the transfer functions of the substructures. An optimization scheme involving the derived sensitivity formula is applied to obtain the optimal physical parameters of isolators of the floating raft system to minimize the mean-square forces transmitted to the base and the time-averaged power transmission to the base, respectively. The simulation results have demonstrated that the proposed method is efficient and accurate, and that the minimization of force transmissibility does not necessarily provide a minimum power transmission.

导出引用

黄修长;徐时吟;张志谊;华宏星. 基于频响函数综合的舱筏隔振系统灵敏度分析和优化＊[J]. 振动与冲击, 2011, 30(5): 145-151

Huang Xiu-chang;Xu Shi-yin;Zhang Zhi-yi;Hua Hong-Xing. Design sensitivity analysis and optimization of a floating raft system using an FRF-based substructuring method[J]. Journal of Vibration and Shock, 2011, 30(5): 145-151