用ALE格式有限元法分析快中子增殖堆的假想堆芯破损事故  

ALE FINITE ELEMENT ANALYSIS OF HYPOTHETICAL CORE DISRUPTIVE ACCIDENT IN LIQUID-METAL FAST BREEDER REACTOR

作　　者：刘闯[1] 张雄[1] 陆明万[1] 

机构地区：[1]清华大学工程力学系,北京100084

出　　处：《工程力学》2006年第2期157-162,共6页Engineering Mechanics

基　　金：国家高技术研究发展(八六三)计划(614-01-02)

摘　　要：任意拉格朗日欧拉(ALE)格式具有网格划分灵活、计算精度高、适用范围广的优点,尤其适用于处理自由液面变化剧烈的快堆假想堆芯破损事故(HCDA)的流固耦合问题。采用ALE格式建立了HCDA分析的有限元计算公式,编制了相应的有限元计算程序,对快堆假想堆芯破损事故进行了流固耦合分析。用国际常用于检验快堆分析程序的CONT标准考题进行了验证,结果与国外多个程序的计算结果相吻合。Arbitrary Lagrangrian-Eulerian （ALE） method has many advantages, such as flexible meshing, high computational precision and wide applicability. It is especially applicable to the fluid-structure interaction problem in hypothetical core disruptive accident （HCDA） of liquid-metal fast breeder reactor. In HCDA the free surface of liquid sodium deforms severely. In present paper, the FEM equations for HCDA analysis are derived based on the ALE formulation. A relevant FEM code is developed and used to analyze the fluid-structure interaction problem of HCDA. The CONT standard examination, which is usually used to check the computational programs for LMFBR, is performed and the numerical results agree well with the available results in the open literature.

关 键 词：快堆 假想堆芯破损事故 有限元 任意拉格朗日欧拉格式 流固耦合 

分 类 号：O33[理学—一般力学与力学基础] O35[理学—力学]