核电水泵在热冲击下瞬态热效应的研究和分析（Ⅱ）──三维时变有限元分析和计算  

The Research and Analysis on the Transient Heating Effect in the Pump of Nuclear Power Station under Thermal Shock (Ⅱ)-Three Dimensional Finite Element Analysis and Computation

作　　者：曹清[1] 吴益敏[1] 张直明[1] 

机构地区：[1]上海大学机械电子工程学院

出　　处：《上海大学学报（自然科学版）》1996年第1期25-31,共7页Journal of Shanghai University:Natural Science Edition

基　　金：上海高等学校科技发展基金

摘　　要：本文首先推导了非耦合热传导方程和拟静态热弹性运动方程的有限元求解公式；然后，根据核电水泵的结构及其性能参数，估算出了水泵不同区域处的对流换热系数；最后，在进行了大量的试算工作和有关数值考核计算的基础上，采用三维时变温度场、热应力和热变形场有限元分析方法，详细考察了核电停堆冷却泵在受热载冲击下各瞬时的瞬态温度场及热应力、热变形场的分布状况和变化行为．本文的研究工作初步形成了对核电水泵机组在热冲击下的瞬态热效应分析的研究方法；同时亦为最终替代代价昂贵的实物实验提供了坚实的理论基础和关键的计算手段．Formulations of the finite element methods for non-coupled heat conduction equations and quasi-static thermoelastic equations are derived in this paper. And estimations of the convection heat transfer coefficients in different parts of the nuClear pump under research are worked out.Then on the basis of a great deal of tryout computational efforts and relevant numerical examining examples, the finite element method is adopted to solve the three-dimensional transient temperature field the thermal stress field and the thermal deformation field of the nuclear pump.The distribution status and valing features of the temperature fild,the thermal stress field and the thermal deformation field at various transient moments are given.Through computing the primary analytical research methods for studying the transient heating effects in the pump of nuclear power station under thermal shock are obtained.

关 键 词：三维有限元法 温度场 热应力场 热变形场 核电厂 

分 类 号：O343.6[理学—固体力学]