东南大学学报（自然科学版）Issue(5)：917-922,6.DOI:10.3969/j.issn.1001-0505.2013.05.003
基于离散元法的杆系结构几何非线性大变形分析
Geometric nonlinear analysis with large deformation of member structures by discrete element method
摘要
Abstract
The discrete element method ( DEM) was applied in geometric nonlinear analysis with large deformation of member structures including two-dimension and three-dimension frames.Based on the simple beam theory, the spring contact stiffness expression for analysis of member structures was derived.The estimation method of the critical value for the time step size was proposed, and the verification of numerical test was carried out.Since the DEM is essentially used to resolve dynamic problem of structures, for the problem of calculating the static solution, the proposed damping coef-ficient is taken as 0.7 considering the numerical accuracy and computational efficiency.Three classi-cal numerical examples were presented, including two planar frames and a spatial reticulated struc-ture.Their static and dynamic large deflection behaviours were simulated respectively.The calcula-tion results agree well with the solutions by other numerical methods.Wi thout assemblnig stiffness matrixes and iterations during s tructural geometric nonlinear analysis, the DEM is reliable in dealing wiht large deformation problem for member struc tures.关键词
离散元法/杆系结构/弹簧接触刚度/几何非线性/静动力响应Key words
discrete element method/member structure/spring contact stiffness/geometrical non-linearity/static and dynamic response分类
建筑与水利引用本文复制引用
齐念,叶继红..基于离散元法的杆系结构几何非线性大变形分析[J].东南大学学报（自然科学版）,2013,(5):917-922,6.基金项目
国家杰出青年科学基金资助项目（51125031）． （）
