定位格架静态屈曲载荷分析方法研究

Method Study on Static Buckling Load Analysis of Spacer Grid

静态屈曲载荷是评价定位格架整体结构性能的重要准则。在分析定位格架各连接构件特征对整体静态屈曲载荷的影响基础上,开展基于有限元分析方法(FEA)的3×3定位格架静态临界屈曲载荷分析方法研究。结果表明:合理的焊点连接与接触参数设置,可较为准确地模拟燃料棒夹持状态;燃料棒装载状态、初始夹持力以及摩擦力对该分析方法的计算结果影响较大。

Static buckling load is an important concept for assessing the structural performance of the spacer grid.The finite element analysis(FEA)of static critical buckling load for 3×3 spacer grid has been investigated with analyzing the influence of grid structural characteristics.Results show that the fuel rod retaining state can be accurately simulated by the suitable setting of welding spot and contact.The fuel rod loading state,initial retaining force and friction have great effects on the results of this method.