应用有限元法对某热试验支架进行热-结构耦合变形分析

文章应用有限元分析软件计算某热试验支架在常温纯静力环境下及低温热-结构耦合环境下(100K)的变形分布情况,分析在这两种环境下热试验支架上试件的绝对变形量和相对变形量,从而研究低温环境对试件结构变形分布的影响。通过仿真计算得知：低温环境下,试验支架结构整体产生了收缩；试件的相对变形量与其约束状况有一定的关系,不对称约束可能会使试件在低温下的相对变形量增大。

THERMAL-STRUCTURAL COUPLING DEFORMATION ANALYSIS OF A TEST BEARER WITH FEM METHOD

In order to research the effect of low temperature on test specimen deformation,the paper calculates the deformation distribution of a thermal test bearer under the environment of room temperature and low temperature with thermal-structural coupling FEM method,and analyzes the absolute and relative deformation of the test specimen under the two environments.The results show that constriction is caused in the whole test bearer; and there is a relation between relative deformation of test specimen and its confinement.