高压容器结构不连续区域的随机有限元分析  

RANDOM FINITE ELEMENT ANALYSIS OF THE UNCONTINUOUS AREA OF A HIGH PRESSURE VESSEL

作　　者：路智敏[1] 苗文勇[1] 汪艳萍[1] 汪琳琳[1] 

机构地区：[1]内蒙古工业大学化学工程学院,呼和浩特010051

出　　处：《内蒙古工业大学学报（自然科学版）》2011年第1期43-46,共4页Journal of Inner Mongolia University of Technology：Natural Science Edition

摘　　要：利用二阶矩法推导出圆柱壳和球壳基于弹性失效设计准则的中径公式的可靠度指标计算公式,并将其应用于一算例中。在此可靠性设计基础上建一圆柱壳和半球形封头连接的高压容器模型,然后利用ANSYS软件对其进行随机有限元分析,求出圆柱筒体与封头连接区的可靠度。结果表明:高压容器中圆柱筒体与封头连接区的可靠度远低于半球形封头与圆柱形筒体的可靠度。本文对输出的功能函数进行的灵敏度分析,可为结构参数的优化设计提供参考。the Intermediate Diameter formula based on the elastic failure norm about reliability of cylindrical shell and sphere shell with internal pressure were conducted by the second moment method and they were applied to an engineering case.Then a model which is a cylinder pressure vessel with a hemispherical head was built.Random finite element analysis of the models was made by ANSYS software.Reliability at the joined area of the cylinder vessel and the hemispherical head was calculated.The result shows that reliability at the joined area of the cylinder vessel and the hemispherical head in internal high pressure vessel is less than the shells in the vessel.At last the sensitivity of the output performance function was analysed.And provide a reference for optimum design of the structure.

关 键 词：压力容器 可靠性 二阶矩法 随机有限元 灵敏度 

分 类 号：TH6[机械工程—机械制造及自动化]