根据相同子结构串系数矩阵的特点 ,研究了直接求解线性代数方程组的方法 ,并将之应用于计算结构动力响应的直接积分法。以一悬臂板的简谐响应为例 ,进行了数值计算。计算结果与一般方法进行了比较 ,并就子结构数目和积分步数等进行了探讨。结果表明 ,利用子结构串的特点 ,大大缩减了计算时间 According to the characteristics of the string coefficient matrices of the same substructure, the method of solving the linear algebraic equations directly is studied and applied to the direct integral method of calculating the dynamic response of the structure. Taking a simple harmonic response of a cantilever plate as an example, a numerical calculation is carried out. The results are compared with the general method, and the number of substructures and integral steps are discussed. The results show that the use of substructures string characteristics, greatly reducing the calculation time