核反应堆堆心的地震响应分析
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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，堆心内流体压力和管梁挠度的响应曲线
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.
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.
引文
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[2] 张若京.统一的管阵流固耦合介质均匀化模型[J] .力学学报,1997 ,29(2) :220 - 223 .
[3] 张若京.管束- 流体耦合振动的附加质量和等效声速[A] .中国力学学会.现代力学与科技进步———庆祝中国力学学会成立40 周年[C] .北京:清华大学出版社,1997 .559 - 562 .
[4] ZHANG Ruo -jing. Aunified 3 - Dhomogenization model of beam bundle influid[J] .Transactions ofthe ASME,Journalof Pressure Vessel Technology ,1998 ,120 :56 - 61 .
[5] ZHANG Ruo - jing .Structurual homogenized analysisfor nuclear reactor core[J] . Nuclear Engineering and Design ,1998 ,183 :151 - 156 .
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