【摘要】 在假定有限元模型的质量矩阵与刚度矩阵均为对称阵,并且质量矩阵是精确的情况下,提出了一种修正刚度矩阵的新方法.该方法借助于矩阵的Kronecker积,把需修正的变量分离出来直接对其进行修正,不仅保证了刚度矩阵带状稀疏的特点,而且修正过程简单易行.数值例子验证了该方法的有效性.更多还原

【Abstract】 Assuming that the mass matrix and the stiffness matrix of a finite element model are symmetric and the mass matrix is exact,a new updating method for the stiffness matrix is established.By using the Kronecker product,all the modified variables to be modified can be found out and updated directly.Sparse characteristic of the updated matrix is preserved.The method is very simple and easy to realize.Numerical example shows that the presented method is quite accurate and efficient.更多还原