摘要
文中分析了集中质量矩阵取代采用一致质量矩阵后对体系自振频率造成的误差,并指出集中质量矩阵应该有条件的使用。并根据相对容许误差,给出了实际计算中采用集中质量矩阵时单元尺寸的选取方法。
The error in the system self-oscillating frequency after the substitution of the concentrated mass matrix for the consistent mass matrix is analysed in this paper and the concentrated mass matrix should be ased under some conditions.At last,the unit size selection methed in the applycation of the concentrated mass matrix and its real culculation is given out accoroling to the relative allowable error.
出处
《青海大学学报（自然科学版）》
2010年第1期35-39,共5页
Journal of Qinghai University(Natural Science)
关键词
有限单元法
集中质量矩阵
一致质量矩阵
finite element method concentrated mass matrix consistent mass matrix
