Buckling Strength of Lining Shells of Pressure Vessels
Buckling Strength of Lining Shells of Pressure Vessels
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DOI：
10.1115/1.2929045
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发表时间：
1992-08
影响因子：
1
通讯作者：
Y. Shimizu;Y. Moriwaki
中科院分区：
文献类型：
--
作者：
Y. Shimizu;Y. Moriwaki
本文从理论和实验两方面对压力容器内衬壳体的屈曲强度进行了研究。首先，利用新开发的计算机程序对衬砌壳体进行了分叉屈曲分析。在分析中，衬砌可以被视为一个受外压的壳体，并包裹在一个刚性空腔中。将离散元结构分析的矩阵位移法的概念推广到含刚性空腔旋转壳的失稳问题。预屈曲的平衡解是轴对称的，但每个单元内的扰动位移场由广义位移的傅立叶周向分量表示。其次，对圆柱壳在均布外压作用下的屈曲问题进行了实验研究。在实验中，壳体试件的径向向外位移受到约束。实验结果与计算机程序分析结果一致。并对几种衬砌壳体进行了数值计算，与无约束壳体的解析计算结果进行了比较。
In this paper, the buckling strength of the lining shells inside the pressure vessel was investigated both theoretically and experimentally. First, the bifurcation buckling analysis of the lining shells was carried out with the aid of the newly developed computer program. In the analysis, the lining could be considered to be a shell subjected to external pressure and encased in a rigid cavity. The concepts of the matrix displacement approach to discrete element structural analysis were extended to predict the instability of shells of revolution encased in rigid cavity. The equilibrium solution for prebuckling was axisymmetric, but the perturbation-displacement field within each element was represented by Fourier circumferential components of the generalized displacements. Second, several experiments on the buckling of cylindrical shell under uniform external pressure were conducted. In the experiments, outward radial displacement of the shell specimen was constrained. The experimental results agreed with the analytical ones by the computer program. Furthermore, numerical calculations were conducted for several kinds of lining shells, whose results were compared with the analytical ones for unrestrained shells.