1000 MW级核电站上充泵外壳体热固耦合分析  

Thermo-coupling Analysis of the Outer Shell of a 1000 MW Nuclear Power Plant

作　　者：张世义 黄志祥 王天周 雪增红 陈平伟 ZHANG Shi-yi;HUANG Zhi-xiang;WANG Tian-zhou;XUE Zeng-hong;CHEN Ping-wei(School of Shipping and Marine Engineering,Chongqing Jiaotong University,Chongqing 400074;Chongqing Pump Factory Co.,Ltd.,Chongqing 400033)

机构地区：[1]重庆交通大学航运与船舶工程学院,重庆400074 [2]重庆水泵厂有限责任公司,重庆400033

出　　处：《液压与气动》2020年第11期113-119,共7页Chinese Hydraulics & Pneumatics

基　　金：重庆市重点创新专项(cstc2017zdcy_zdyf0023)。

摘　　要：核电站上充泵处于瞬间变化的温度场和热变形场中,在变化的热冲击作用下,会对上充泵的一些关键部位造成损害。此外,由于整个上充泵结构的热变形,对泵的转子的动力学性能产生严重的影响。建立了泵外壳模型,基于热固耦合理论,在阶跃载荷作用下,对其进行三维-热固耦合数值模拟分析,计算出了泵壳的热应力,并通过2种方法对热应力进行了评定。结果表明,泵壳结构体上出现的最大应力为106.74 MPa,小于ASMEⅡ所确定的材料应力强度;最大变形量为1.867 mm,小于外壳体与内壳体之间的间隙;应力叠加法和间接耦合法得出总应力强度分别为107.76 MPa和106.45 MPa,2种方法评定结果基本一致。上充泵热冲击是核电站规范中的强制性考核内容之一,通过热-固耦合仿真分析上充泵外壳体的热应力校核工作,具有实际工程意义。The charge pump of the nuclear power plant is in the instantaneously changing temperature field and thermal deformation field.Under the action of the changing thermal shock,it will cause damage to some key parts of the charge pump.In addition,due to the thermal deformation of the entire charge pump structure,it has a serious impact on the dynamic performance of the pump rotor.In this paper,the pump casing model is established.Based on the thermo-solid coupling theory,under the action of step load,the three-dimensional-thermo-solid coupling numerical simulation analysis is performed to calculate the thermal stress of the pump casing,and the thermal stress is calculated by two methods.Assessment.The results show that the maximum stress on the pump casing structure is 106.74 MPa,which is less than the material stress strength determined by ASMEⅡ;the maximum deformation is 1.877 mm,which is smaller than the gap between the outer casing and the inner casing;stress superposition method and indirect coupling The total stress intensity obtained by the method is 107.76 MPa and 106.45 MPa,and the evaluation results of the two methods are basically the same.The thermal shock of the top-charging pump is one of the mandatory assessment contents in the nuclear power plant specification.This paper analyzes the thermal stress check of the top-charging pump shell through thermal-solid coupling simulation,which has practical engineering significance.

关 键 词：核电上充泵 热固耦合 热冲击分析 应力评定 

分 类 号：TH137[机械工程—机械制造及自动化] O319.56[理学—一般力学与力学基础]