摘要
根据堆心的三维均匀化动力学模型，给出了分析堆心地震响应的基本方程和定解条件．采用有限元法进行离散，并应用Ｗｉｌｓｏｎ －θ直接积分法编制了数值计算软件，给出了一个数值算例．计算了在地震加速度激励下。
Nuclear reactor core is composed of a great number of tubular beams, which are immersed in a fluid with period structure. The fluid structure interaction is an important phenomenon influencing the dynamical response of bundle, and it's very complex. Much effort has been made upon the development of a mathematical model capable of predicting the global behavior of the beam bundle. Based on the 3-D homogenization model, fundamental equations and boundary conditions are presented for the analysis of the core's seismic response. Finite element method is employed for detailed analysis. Results of responses of the fluid pressure and the beam deflection under seismic excitation are presented.
出处
《同济大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
1999年第6期643-647,共5页
Journal of Tongji University:Natural Science
基金
上海市教委重点学科资助
教育部固体力学开放实验室资助
关键词
核反应堆
均匀化
地震响应
堆心
数值计算
nuclear reactor core
seismic
beam bundle
fluid structure interaction
homogenization
