摘要
在插值理论下,给出了梁杆系统在常规有限元方法中描述的切线刚度阵.由二阶理论和随动坐标法建立了梁杆系统精确几何非线性有限元增量平衡方程和切线刚度阵.针对有限元方法在结构稳定性分析中的应用,对常规有限元方法和精确方法进行了比较,用实例说明,精确方法较常规方法在计算精度、工作量方面有着巨大的优势.
Accurate geometrical-nonlinear FEM updated equilibrium equation and tangent stiffness matrix of beam and truss system analysis is presented by means of the2nd order theory and concomitant coordinate method.Based on FEM using in analysis of beam and truss system,the conventional and accurate FEM are com-pared,it is deduced that the accurate method has great superiority on aspects of calculating precision.
出处
《哈尔滨建筑大学学报》
北大核心
2002年第4期25-28,共4页
Journal of Harbin University of Civil Engineering and Architecture
关键词
梁杆结构
稳定性
有限元法
二阶理论
随动坐标法
几何非线性
the2nd theory
concomitant coordinate method
beam and truss system
geometrical-nonlinear
the accurate method
the conventional method
