基于Octree-SBFEM跨尺度模型的大型商用飞机撞击核电厂的精细化损伤演化分析  

Cross-Scale Refined Damage Evolution Analysis of Impact of Large Commercial Aircraft on a Reactor Building Based on Octree-SBFEM

作　　者：邹德高[1,2] 隋翊 陈楷 潘蓉[3] 熊京川 Zou Degao;Sui Yi;Chen Kai;Pan Rong;Xiong Jingchuan(State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian,Liaoning,116024,China;School of Hydraulic Engineering,Faculty of Infrastructure Engineering,Dalian University of Technology,Dalian,Liaoning,116024,China;Nuclear and Radiation Safety Center,Ministry of Environmental Protection,Beijing,100082,China;China Nuclear Power Design Co.Ltd.(Shenzhen),Shenzhen,Guangdong,518000)

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024 [2]大连理工大学建设工程学部水利工程学院,辽宁大连116024 [3]环境保护部核与辐射安全中心,北京100082 [4]深圳中广核工程设计有限公司,广东深圳518000

出　　处：《核动力工程》2019年第5期140-145,共6页Nuclear Power Engineering

基　　金：地震行业科研专项经费项目(No.201208013);国家科技重大专项资助项目(2011zx06002010-7)

摘　　要：采用比例边界多面体有限元分析方法,结合八分树网格离散技术,开展了第三代核电厂在大型商用客机撞击下屏蔽厂房的损伤演化分析,讨论了基础效应、撞击区域形状选取和结构-地基相互作用的影响。结果表明:比例边界多面体有限元分析方法具有极强的网格离散能力、单元质高量少,且对模型修改有极高的适应性,与传统方案相比,效率可提高几十倍;精细化模型更准确地模拟了损伤演化与渐进破坏过程;飞机撞击核岛分析中的基础效应及结构-地基相互作用(SSI效应)在非岩性地基时不可忽略。Combined with the scaled boundary polyhedron finite element analysis method,this paper firstly applies the Octree Technique to the nuclear engineering.The refined damage evolution analysis of large commercial aircraft crashing into GenerationⅢ+nuclear power plants is developed.Meanwhile,the influence of foundation effect,shape of impact region chosen and SSI effect is discussed.The results indicate that the cross-scale refined analysis method is with extremely strong capability of discrete grid,high quality and little quantity of element.Furthermore,the method is highly flexible for the model modification;the refined FEM model simulates more accurately the damage evolution and gradually destruction process;the structure-soil interaction(SSI)effect in the analysis of the aircraft impact on nuclear islands cannot be ignored in non-lithology foundation.

关 键 词：八分树 比例边界有限元 塑性损伤 AP1000 飞机撞击 结构-地基相互作用 

分 类 号：TL37[核科学技术—核技术及应用]