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本文对固定界面模态综合法作出两点简化。其一是用所谓迭代Ritz矢代替子结构的固有振动模态,以节约计算机时。其二是由平衡条件消去全部或部分界面自由度,以减缩最后综合规模。这样做就要求采用集聚质量矩阵,而且对应于被消去自由度的质量应等于零或极小。附有算例。
This article makes two simplifications for the fixed interface modal synthesis method. One is to replace the natural vibration modes of the substructure with so-called iterative Ritz vectors to save the computer. The second is to eliminate all or part of the interface freedom from the equilibrium conditions to reduce the final comprehensive scale. Doing so requires the use of an accumulating mass matrix, and the quality corresponding to the degree of freedom to be eliminated should be equal to zero or minimum. With examples.