关键词: 高压容器, 强度, 分析, 有限元法, 热应力

Abstract: In this paper the thermal elastic contact stress under a super-high pressure cylinder body in a perforation simulating device is carried out by the mixed-method of finite-element.The mathematical model to be used in the paper can reduce the iteration processes in calculating contact forces to the calculation of a few screwthread contact points,which may avoid the generation and solution of initial equations for many times and greatly increase the calculation speed.Also,a virtual-springs may be used to solve the singular problem of global stiffness matrix.The device has been tested with perforation explosion experiments for many times over the last two years, which shows that the results of the theoretical analysis is correct and the body may work safety and reliably.

Key words: high pressure vessel, intensity, analysis, finite element method, thermal stress