给出两个矩阵同时合同对角化与同时相似对角化的一些条件。

The conditions of simultaneous diagonalization of two matrices are given.

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本文在位移元本征应力模式基础上引进调节参数，同时，利用矩阵H对角化方法计算杂交元应力子空间的本征应力模式，然后由此方便有效地计算特征值，从而大大提高了计算效率。

The parameters are introduced based on the natural stress modes of the displacement element, and the method of matrix H diagonalization was introduced to improve the calculation of the natural.

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