基于线性弹塑性模型的主蒸汽超级管道管嘴应力指数计算和优化设计  

Calculation and optimization design of stress index of main steam super pipeline nozzle based on linear elastic-plastic model

作　　者：詹敏明 宋煜 李飞 武心壮 ZHAN Minming;SONG Yu;LI Fei;WU Xinzhuang(Shanghai Nuclear Engineering Research and Design Institute Co.,Ltd.,Shanghai 200233,China)

机构地区：[1]上海核工程研究设计院有限公司,上海200233

出　　处：《压力容器》2021年第5期52-58,共7页Pressure Vessel Technology

基　　金：国家科技重大专项(2020ZX06002003)。

摘　　要：主蒸汽超级管道是核电站的重要管道之一,介绍了国内某型核电站超级管道管嘴的设计方法,讨论了超级管道应力评定过程中应力指数B_(2)的重要性。利用线性弹塑性材料模型和ANSYS有限元软件,通过极限载荷法计算得到管嘴的应力指数B_(2),并与ASME规范中公式法计算得到的B_(2)作比较,结果显示公式法计算的B_(2)有较大裕量。据此结论对超级管道的管嘴进行优化设计,优化后管嘴的B_(2)仍小于公式法计算值,说明超级管道应力评定(公式法计算的B_(2))结果对优化后的管嘴适用,设计优化后的管嘴强度满足ASME规范要求。The main steam super pipe is one of the important pipelines in nuclear power plant.The design method of super pipe nozzle of a nuclear power plant in China is introduced,and the importance of stress index B_(2) in the process of stress evaluation of super pipe is discussed.Using the linear elastic-plastic material model and ANSYS finite element software,the stress index B_(2) of the nozzle is calculated by the limit load method,and is compared with the B_(2) value calculated by the formula method in the ASME code,the results show that the B_(2) value calculated by the formula method has a large margin.According to this conclusion,the optimal design of the nozzle of the super pipeline shows that the B_(2) value of the optimized nozzle is less than the calculated value of the formula method,indicating that the stress evaluation result of the super pipeline(formula method B_(2))is still applicable to the optimized nozzle,and the strength of the optimized nozzle meets the requirements of the ASME code.

关 键 词：超级管道 极限载荷法 应力指数 设计优化 

分 类 号：TH123[机械工程—机械设计及理论] TQ055.8[化学工程]