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本文提出结构模态分析的一个新方法──无对接界面的自由子结构法。它具有在 子结构模态综合时没有对接界面自由度的优点。通过算例表明，本文方法在求解结构 低阶主模态时具有较高的计算精度。文中还提出计及子结构高阶截余模态剩余影响的 修正方法。
This paper presents a new method of structural modal analysis—the free substructure method with no interface. It has the advantage of not having a degree of freedom in the interface when submode modal synthesis. The numerical example shows that the proposed method has high accuracy in solving the low-order principal mode of the structure. The paper also proposes a correction method that takes into account the residual effects of high-order modes of substructures.