燃料包壳大变形行为三维有限元分析研究  

The Study of Cladding Large Deformation Base on Three Dimension Finite Element Analysis Method

作　　者：韩智杰[1] 贺亚男 刁均辉[1] 季松涛[1] HAN Zhijie;HE Yanan;DIAO Junhui;JI Songtao(China Institute of Atomic Energy,Beijing,102413 China;Xi'an Jiaotong University,Xi'an,Shaanxi Province,710049 China)

机构地区：[1]中国原子能科学研究院,北京102413 [2]西安交通大学,陕西西安710049

出　　处：《科技创新导报》2020年第29期31-35,共5页Science and Technology Innovation Herald

摘　　要：包壳鼓胀大变形行为是失水事故过程中的重要燃料安全问题。为了研究局部效应对包壳鼓胀大变形的影响,通过自定义锆合金包壳材料蠕变性能,建立了三维有限元非线性A BAQUS分析模型。根据给定的包壳温度、压力边界条件,研究讨论了升温速率、超压速率、温度及温度不均匀分布对失水事故下包壳大变形的影响,结果表明,局部周向温差是各向异性包壳在鼓胀过程中发生弯曲的主要原因。包壳大变形三维有限元分析模型对指导包壳鼓胀试验具有积极作用。The cladding ballooning large deformation behavior is an important fuel safety issue during loss of coolant accident.In order to study the effect of local effects on the cladding ballooning large deformation,a three-dimensional finite element nonlinear ABAQUS model was established by def ining the creep properties of the zirconium alloy.The effects of heating rate,overpressure,temperature and non-uniform temperature distribution on the cladding large deformation under loss of coolant accident condition are simulated and discussed by the given cladding temperature and pressure boundary conditions.The results show that the local circumferential temperature difference is an important reason for the bending of a few cladding during the ballooning.The three-dimensional finite element analysis model of the cladding large deformation has a positive meaning on guiding the cladding ballooning test.

关 键 词：包壳大变形 有限元分析 三维 包壳鼓胀 

分 类 号：TL364.4[核科学技术—核技术及应用]