机械结构动特性的灵敏度分析与修改

The Sensitivity Analysis and Modification of Dynamic Behavior of Mechanical Structures

本文推导了一般粘滞阻尼系统的一阶和高阶灵敏度计算式,并引用连续摄动思想,采用了把高阶灵敏度分析与连续摄动分析相结合的方法,对机械结构的动态特性进行灵敏度分析与修改.根据此法编制了灵敏度分析与修改的通用程序,通过实验验证,说明了本方法和程序的有效性。

In the beginning of this paper,the first and high-order sensitivity calcu- lation equations for a damped system are derived.Then,by introducing the idea of continuous perturbation theory,a new method for sensitivity analysis and modification of mechanical structures is proposed.In this method,only a set of complexmodel data are needed as initial conditlons.The structure para- meters can be varied almost without limit.A general computer program of this new method is also provided.Finally,computer simulation and model tests have been experimented with this method.The effectiveness of the meth- od and programs are proved.Additionally,a modification method of multiply frequencies is proposed for all order frequencies.