结构减振设计的协同优化分析

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振动与冲击 ›› 2009, Vol. 28 ›› Issue (8) : 113-116,.

论文

结构减振设计的协同优化分析

黄海燕1,王德禹2

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COLLABORATIVE OPTIMIZATION ON REDUCING STRUCTURAL VIBRATION

HUANG hai-yan1,WANG De-yu2

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文章历史 +

摘要

建立一种适用于工程结构减振设计的协同优化模型。在学科级优化子模型中，分别使用了不同的目标函数；在系统级优化子模型中，以如何获得尽可能接近于子学科独立优化的最优解为目标函数。系统级目标函数消除了量纲和数量级的影响。该模型采用分布协同的双层结构，允许在每一级优化中使用不同的优化策略。以减速器和板梁柱混合结构为例，对其进行了单学科和多学科优化分析。实例结果表明，在结构减振设计时，采用协同优化模型进行优化设计，不仅可以有效的降低结构动力特性参数，而且优化后结构的综合性能更佳，说明该模型能应用于实际工程结构的减振设计。

Abstract

This paper presents a collaborative optimization (CO) strategy on reducing vibration of engineering structure. Different objective functions in various subsystem-level optimization models are used. In system-level optimization model, a new objective function is advised to minimize relative deviation value between the collaborative objective function and single disciplinary objective function. And it eliminates the effect of different dimensions and the order of magnitudes among objectives. The proposed CO architecture enables multi-objectives of the system and subsystem-level’s to be considered at both levels during optimization. A bi-level optimization strategy is advised. The proposed optimization and strategy are demonstrated with two examples. One of them is a reducer optimization problem, and another is a mixed structure which is made up of pillar, beam and plate. The results of examples show that the proposed CO model is feasible and reliable, and can not only effectively decrease the dynamic responses of engineering structure, but also the final structure has better global properties.