反应堆压力容器密封系统瞬态热弹塑性接触的高效解法

High Efficiency Algorithm for 3D Transient Thermo- Elasto-Plastic Contact Problem in Reactor Pressure Vessel Sealing System

本文在自行开发的三维瞬态密封分析程序的基础上,采用弹塑性小变形问题的非线性求解方法、接触问题的混合求解算法、接触传热有限元混合法、线性方程组求解器等方法,提高了计算效率,并对三维瞬态密封分析程序中相应的计算和分析模块进行了修改和补充。应用改进后的分析程序对压力容器模拟体进行密封分析,计算效率提高了一倍以上。

There are some complex operating cases such as high temperature and high pressure during the operating process of nuclear reactor pressure vessel. It is necessary to carry out mechanical analysis and experimental investigation for its sealing ability. On the basis of the self-developed program for 3-D transient sealing analysis for nuclear reactor pressure vessel, some specific measures are presented in this paper, to enhance the calculation efficiency in several aspects such as the non-linear solution of elasto-plastic problem, the mixed solution algorithm for contact problem as well as contact heat transfer problem and linear equation set solver. The 3-D transient sealing analysis program is amended and complemented, with which the sealing analysis result of the pressure vessel model can be obtained. The calculation results have good regularity and the calculation efficiency is twice more than before.