核动力装置管道有限元分析及VR仿真研究

Finite Element Analysis and VR Simulation of Nuclear Power Plant Pipeline

针对不同点蚀坑深度,利用有限元分析软件分析核动力装置高压管道内部的静态应力分布,并结合奥氏体不锈钢的材料特性计算出管道最小安全系数。利用VR技术,对高压管道应力腐蚀的整个过程做了直观的虚拟仿真。结果表明:点蚀坑的存在会导致高压管道安全系数下降,但安全系数与点蚀坑深度之间的关系呈现出不同的发展阶段,即安全系数快速下降阶段、相对稳定阶段以及再次下降阶段。

For the different depth pitting corrosion pits,the static stress distribution within high-pressure pipeline of nuclear power plant was analyzed using finite element analysis software,and the minimum pipeline safety factor was calculated combining with the material properties of austenitic stainless steel.The results show that the existence of pitting corrosion pit would lead to the decrease of safety factor.But the different development stages of the relationship between the safety factor and the depth were showed：safety factor rapid decline phase,relatively stable phase and again decline phase.Finally,the whole stress corrosion process of the high-pressure pipeline was virtually simulated intuitively by the VR technique.