【摘要】 文中应用混合类型的子结构模态综合方法缩减复杂坝基系统的有限元动力分析方程，以减少相应的计算时间，并提出了计入自由子结构高阶模态静力影响的修正方法，以提高模态综合精度。算例表明：这些方法对于求解复杂主从结构系统的特征值问题是很效的。更多还原

【Abstract】 Synthetic method of hybrid component mode synthesis method is used for the modal analysis of a dam-rock foundation system discretized by finite elements. An improved technique for hybrid CMS method is also developed for considering the static effect of truncated higher modes of the rock foundation in the system synthesis procedure. The numerical examples show that the method proposed in this paper has high computational precision.更多还原