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本文研究复杂结构的动力学设计问题。发展了多频优化、多模态优化和频率响应优化等多种动力学设计方法,考虑了设计变量上、下限,重量上、下限,以及静强度准则等约束条件。采用结构按设计变量建立的有限元模型,根据动力学要求的灵敏度分析确定设计变量,用最优化方法进行结构动力修改。计算实例证明了方法有效,并满足工程需要。
This paper studies the dynamic design of complex structures. A variety of dynamic design methods, such as multi-frequency optimization, multi-modal optimization and frequency response optimization, have been developed. The upper and lower limits of the design variables, the weight upper and lower limits, and the static strength criteria have been considered. The finite element model of the structure according to the design variables was used to determine the design variables based on the sensitivity analysis of the dynamics requirements. The structural dynamics were modified by the optimization method. The calculation example proves that the method is effective and meets the engineering needs.