外部超单元在车身结构动力学分析中的应用

摘要

在阐述模态综合法基本理论的基础上,提出车身结构外部超单元的划分方法,并分别采用外部超单元模态综合法和自动部件模态综合法求解车身结构的模态及响应.通过与传统计算结果对比表明,在车身模态计算和车身频响计算中.外部超单元模态综合法和自动部件模态综合法与传统计算结果吻合程度均较好.且节省了90％以上重复计算时间和50％的存储空间.%Based on Component Mode Synthesis (CMS) theories, a partition method of external superelements in automotive body structure is proposed. External superelement CMS method and Automated Component Mode Synthesis (ACMS) method are applied to mode and frequency response analysis of the automotive body structure. Compared results show that, in mode and frequency response analysis of the automotive body structure, both the calculation results of external superelement CMS method and ACMS are relatively consistent with those of the traditional calculation. Furthermore, more than 90% of the recalculating time and 50% of the memory space are saved.