摘要
本文提出了计算结构动力方程的4次,五次精度的五条件稳定积分格式的ρ法,法具有良好的算法阻尼特性和周期延长率。没有超越现象,和以往的高精度方法相比,ρ法具有存贮空间小,计算量少的优点。ρ法的无条件稳定性的证明,可不要求阻尼矩阵满足振型正交条件。
The paper poses a p method of unconditionally stable direct integration, with fourth-order and fifthorder accuracy. The p method shows a good algorithmic damping 籲d period extension property, and no 'overshooting' phenomenon. It needs less calculation and storage space than other high accurate methods. The proof of its unconditionally stable requires no damping matrix to satisfying the condition of the orthogonality of modes.
出处
《力学学报》
EI
CSCD
北大核心
1989年第4期459-468,共10页
Chinese Journal of Theoretical and Applied Mechanics
关键词
结构
动力方程
精度
ρ法
算法阻尼
algorithmic damping, period extension, unconditionally stable.
