【摘要】 基于ESO方法并结合工程实际的需要,对三维结构的多频率优化进行了研究.建立了多频优化模型,导出了结构多频率优化灵敏度公式,给出了优化迭代步骤和衡量优化效率的性能指标,并采用灵敏度重分析技术减少了计算工作量.给出的算例显示了本研究方法的正确性和有效性.更多还原

【Abstract】 Based on the evolutionary structural optimization(ESO) and according to engineering real requirements,the research on the three dimensional structural multiple frequency optimizations is carried out paper.First,a multiple frequency optimization model is built,and a set of structural multi-frequency optimization sensitivity formula is derived.Then,a re-analysis technology for frequency sensitivities is adopted to reduce its calculation quantity.And an multi-frequency optimization procedure and a performance index of the optimization efficiency are given.The examples given show that the method proposed is applicable and effective.更多还原