一种精确结构静力重分析法  

An exact method for structural static reanalysis

作　　者：黄传奇[1] 

机构地区：[1]南京航空航天大学飞行器系

出　　处：《计算结构力学及其应用》1996年第3期295-302,共8页

摘　　要：本文提出了一种结构静力重分析方法。通过引入结构刚体位移特征向量，可以导出结构广义柔度矩阵，原阶数较高的刚度方程被转化成一阶数较小的线性系统，位移一般解可以在边界条件尚未引入结构刚度矩阵之前导出，对于有局部变化的结构，新的结构广义柔度矩阵可以迅速进行修改。这种静力重分析可以用在载荷条件、边界条件、结构单元同时或分别改变时的静力分析之中，文中提供了两个算例。This paper presents a structural static reanalysis method. Through the introduction of structural rigid motion eigenvectors, the generalized structural compliance matrix can be introduced and the original stiffness equation of higher order is transformed into a linear system of much lower order. The general solution of displacements can be expressed prior to any assignment of boundary conditions. For locally modified structures, the structural compliance matrix can be adjusted quickly. This static reanalysis method can be used for structures with modifications on boundary conditions, loading conditions and structural elements, either independently or in combination. Two test examples are provided in the paper to prove the efficiency of the method.

关 键 词：静力重分析 有限元法 结构分析 

分 类 号：TB121[理学—工程力学] O242.2[理学—力学]