摘要
考虑到柔性结构几何非线性的特点,采用显式动态分析方法,利用ansys/ls-dyna壳单元对张拉平面膜材褶皱的发展过程进行数值模拟和研究分析。把薄膜结构褶皱的整个发展过程划分为缺陷、微观褶皱和宏观褶皱3种状态,并给出每种状态的特点。选择带有不同初始缺陷的膜片进行加载分析,对每种状态进行了详细描述,且对初始缺陷在每种状态时的影响进行了对比。研究结果表明:把张拉平面膜材褶皱划分为3种状态可以更有效的衡量褶皱发展的程度,并可以方便的对处于特定状态的结构进行研究和描述。
Considering the geometric nonlinearity of Flexible Structures, the paper adopted the explicit dynamic method to analyze the transition of the wrinkles in the tension plane membrane by use of shell elements based on ansys/ls-dyna package. The transition of the membrane wrinkles was divided into three states, imperfection state, micro wrinkles state and macro wrinkles state. The features of each state were simulated. The tensioned membranes with different initial imperfections were calculated and analyzed. The influences of initial imperfections in each state were described and compared. The results show that the transition levels can be measured more effectively by dividing the process into three states. In addition, the tensioned membrane in each state can be described and analyzed effectively and conveniently.
出处
《工程力学》
EI
CSCD
北大核心
2011年第8期70-76,82,共8页
Engineering Mechanics
关键词
薄膜褶皱
薄壳单元
显式动态分析
张拉薄膜
初始缺陷
membrane wrinkling
shell elements
explicit dynamic analysis
tension plane membrane
initialimperfections
