筒体整体补强结构强度分析

Stress analysis of integral reinforced structure under internal pressure

针对内压圆柱壳大开孔率开孔整体锻件补强结构 ,进行了三维线弹性有限元应力分析 ,并应用电测应力分析方法对开孔区的应力分布进行了实验验证 ,得到了一些有价值的结论。有限元计算和电测应力分析的结果证明 ,用电阻应变测量方法测量到的是应变片长度范围内应力场的平均值 ,而得不到该区域内的最大应力值。以DXF文件为中介 ,用数学方法自动生成的有限元计算模型是可靠的 ,能够保证开孔区域内的单元都是比较规整、均匀的 8节点单元 ,可使用不协调位移模式 。

For the cylindrical shells subject to internal pressure, the integral reinforced structure of forging is studied by strain gauging method The strain gauging method and the finite element method are applied in this work to examine the distributions of stress at reinforced area, and both the results of analysis are compared with to each other Some valuable conclusions are arrived It is shown that the peak stress can not be measured by strain gauging method, and the average values of steep stress field nearby the measured point are obtained