摘要
提出模拟件-产品件有限元数值计算方法研究反应堆压力容器(RPV)顶盖与多个控制棒驱动机构(CRDM)管座焊接的残余应力分布。进行模型件制造和试验测试,获得温度循环、残余应力等数据,针对模拟件残余应力进行数值计算,以试验数据标定模拟件模型和算法并进行优化,最后将优化算法和模型应用于产品件的数值计算。将该方法用于包含2个非中心孔位置J型焊缝的RPV顶盖产品件焊接残余应力算。结果表明:模拟件-产品件的研究方法可应用于核电大型焊接结构的残余应力高效数值分析,CRDM管座焊缝之间的应力叠加效果不明显。
A mockup-to-production method was proposed to investigate the welding residual stress induced by the welding of reactor pressure vessel （RPV） head and control rod drive mechanism （CRDM） nozzle. The mockup was built firstly, the welding temperature and residual stress were measured from the mockup; then the finite element simulation on the mockup was carried out and the simulated temperature and stress results were validated by the experimental data; based on the mockup, the simulation model and algorithms were further optimized and were finally used to simulate the residual stress of the product. The residual stress in the nuclear RPV head with two J-type welds at the locations of non-center hoIe were efficiently simulated with the proposed method. In addition, the superposition effect at the region between the two J-type welds were investigated. Results show that the mockup-to-production method is an efficient and effective method for the simulation of large nuclear welded structures; the superposition effect at the region between two J-type welds in RPV head is not significant.
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2015年第6期75-78,共4页
Nuclear Power Engineering
