用动态缩聚法求解结构的特征值问题

Dynamics condensation method for structuraleigenvalue problem

基于逐级逼近思想提出了一种新的动态缩聚法。保留和压缩的自由度通过一个缩聚矩阵联系，最初的缩聚矩阵由系统子矩阵定义。用循环的方法逐级逼近特征值及特征向量。计算实例验证了上述方法的可行性。

An important dynamic condensation method is presented for accurate calculation of struc- tural eigenproperties. The kept and reduced of freedom in the approach are related through a condensation matrix that is uesd to form a condensation eigenvalue problem. The eigenproperties calculated in an iteration are utilized to update the condensation matrix until a desired convergence in the eigenvalues is achieved. Numerical examples are presented to show the applicability of the proposed method.