单元网格大小对热应力的影响

THE INFLUENCE ON THERMAL STRESS OF THE MESH GRID SIZE

在给定边界约束条件的情况下,热应力主要取决于温度载荷场的平均温度和等效梯度,而这两个因素主要由单元网格大小决定。针对结构热分析中的网格密度问题,应用MSC/NASTRAN有限元分析软件研究探讨有限元单元网格大小对结构热应力的影响。

Given the boundary condition constraints, thermal stress mainly depends on the average temperature and equivalent gradient of the loading field. And these two factors mainly depend upon the sizes of mesh grids. In this paper to the grid density problem in thermal analysis, we use MSC/NASTRAN to analysis and study the influence of the sizes of mesh grids on the structure thermal stress.