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利用复模态的矩阵摄动理论，分析一般粘性阻尼系统的模态频率和复振型对结构质量、刚度及阻尼修改的灵敏度特性，从而阐明选择结构摄动修改方案和最灵敏位置的一般原理，减小了复杂结构动态特性修改设计的计算量。通过对ＲＤＴ１试验台动态特性的摄动分析计算，获得满足试验台工作特别要求的动态特性的结构设计方案。
The complex modes matrix perturbation theory is used to analyze the modal frequencies of general viscous damping system and the sensitivity characteristics of complex modes to the modification of structural mass, stiffness and damping, so as to illustrate the general principle of the perturbation modification scheme and the most sensitive position of the selected structure , Reducing the computational complexity of modifying the design of dynamic characteristics of complex structures. Through the dynamic analysis of the dynamic characteristics of the RDT1 test rig, the structural design of the dynamic characteristics that meets the special requirements of the test rig is obtained.