蒸汽发生器一次侧人孔螺栓连接结构三维有限元分析  

Three-Dimentional Finite Element Analysis for Bolted Flange Joint Structure of Primary Manway of Steam Generator

作　　者：陈涛 陈蓉 张云波[2] 路燕[2] 

机构地区：[1]深圳中广核工程设计有限公司,518124 [2]环境保护部核与辐射安全中心,北京100082

出　　处：《核动力工程》2014年第4期31-34,共4页Nuclear Power Engineering

摘　　要：采用三维有限元模型,对核电厂蒸汽发生器一次侧人孔螺栓进行运行工况下的瞬态分析。综合考虑螺栓温度滞后、法兰转角及法兰与垫片嵌合面的弹塑性接触等因素,解决螺栓孔及人孔盖与法兰之间的空气传热问题,实现螺栓预紧模拟及螺栓载荷的动态提取,较真实地模拟出系统的变形协调性及传热特性,并根据规范对螺栓密封状态进行验证,对法兰连接结构及螺栓本身进行疲劳评价。Three-dimentional finite element model for bolted flange joint structure of primary manway of steam generator was built considering temperature lag of the bolt, turning angle of the flange and contact between gasket and the flange, nut and the cover. Transient analysis was carried out under normal and upset conditions. Problem of air heat trsfer in the bolt hole and between the cover and the flange were solved. Bolt pretension load was applied, and the change of the bolt load was obtained along with the time. Mechanical and heat haracterics of the joint structure was simulated. Leaktightness was validated and fatigue stress and displacement of the joint structure were estimated according to regulations.

关 键 词：蒸汽发生器 螺栓法兰 密封分析 瞬态分析 

分 类 号：TL353.11[核科学技术—核技术及应用]