平面张拉薄膜屈曲过程的数值分析  

Numerical studies on buckling process of tensioned plane membrane

作　　者：马瑞[1] 杨庆山[1] 王晓峰[1] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044

出　　处：《北京交通大学学报》2013年第4期114-118,共5页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：国家自然科学基金资助项目(51278049)

摘　　要：基于显式算法,以ANSYS/LS-DYNA为平台,采用壳单元,对平面张拉薄膜在剪切位移荷载作用下褶皱的产生及发展过程进行研究,分析了褶皱在不同发展阶段波长和幅值的变化规律.针对平面张拉薄膜屈曲过程的特点,将此过程划分为3个阶段:前屈曲阶段,屈曲阶段,后屈曲阶段,分别研究了各个阶段薄膜面外变形分布特征及对结构特性的影响.With the explicit algorithm adopted, the transition of the wrinkles in the tensioned plane membranes under shear loading conditions are analyzed by a shell element of ANSYS/LS-DYNA. Wavelengths and amplitudes of wrinkles and their variation in different processes are also obtained. The whole buckling process of a tensioned plane membrane can be characterized by such three stages as pre-buckling, buckling and post-buckling. And the distributions of the out-plane displacement in each stage and their influence on the behaviors of the structure are also studied.

关 键 词：张拉薄膜结构 非线性屈曲 褶皱发展过程 初始缺陷 显式算法 

分 类 号：TU311.1[建筑科学—结构工程]