摘要
在子结构的固定界面最低频率比整体结构基频较高的条件下,把结构动态特性计算的模态综合超单元法以其简化解拓广至结构动态响应的计算领域,并用固定界面 Ritz 矢量替代子结构的固定界面模态。通过数值运算,充分说明本方法经济有效,精度令人满意.
Under the conditions that the lowest frequency of the substructuralfixd interface boundary is higher than the fundamental frequency of the com-plete structure,the simplifying solution of superelement method of modal syn-thesis for substructure dynamic character calculation is extended to computa-tional domain of the substructure dynamic response,and the fixed interfaceRitz vectors are substituted for the fixed interface modes of substructure.Acomparison of the numerical results indicates that the method used in thispaper is economically effective and reasonably accurate.
关键词
动态响应
模态综合
模态迭加法
dynamic response
superelement method of modal synthesis
Ritz vector
mode superposition method
