摘要
提出了一种三维冲击-动力接触问题的有限元混合算法,该算法用库仑摩擦定律表述动力接触面的边界条件;按修正的Cholesky分解算法建立接触面的有效柔度阵方程。在按Newmark算法作逐步积分计算中,每一时间步的迭代计算。
A mixed finite element algorithm of three-dimensional impact-dynamic contactproblems is developed.The Coulomb’s law of friction is employed to describe the boundary cundl-tions on dynamic contact surface,and a modified Cholesky elimination algorithm is used to establishthe effective flexibility matrix equation of the dynamic contact surface. In the process of iterationsby using Newmark direct numerical integration.the iterations of each time step are condensed onlyon the solutions of the effective flexibility equation on contact surface. The results show that the al-gorithm presented in this paper has a high effeciency and numerical accuracy,and it can be widelyused in the numerical simulation of complex impact-dynamic contact engineering problerns
出处
《重庆大学学报(自然科学版)》
CAS
CSCD
1994年第2期52-57,共6页
Journal of Chongqing University
基金
国家自然科学基金
关键词
冲击
动力接触
有限元法
算法
impact-dynamic contact problems
finite element method
dynamic responses