核电站结构地震动态响应并行计算研究
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摘要
为了分析核电站复杂结构地震动态响应,以MPI作为基本并行编程环境,在LINUX操作系统下,开发了核电站结构地震动态响应的并行有限元计算程序。该程序采用黏弹性边界模拟外行波向远域地基的辐射,方程的求解采用时域显式解法,能够模拟包含各类静动荷载以及温度、接触等因素作用下的结构响应。经算例验证,该程序正确可靠。利用该程序对某核电站取水口建筑物进行了动态响应分析,并与ANSYS软件的分析进行比较,所花费时间从单机串行程序的20h40min减少到并行程序下的2h15min。结果证明,该并行程序具有较高的并行度以及良好的并行效率。
A parallel computation finite element method(FEM) program for nuclear power station structure dynamic response was developed with the LINUX operating system using the message passing interface(MPI) as the parallel computation environment to analyze nuclear power station complex structure earthquake dynamic response.The viscous-spring boundary condition was used to simulate the outward wave in the program with the explicit formulation in the time domain used to solve the equations,which can simulate the structural response on multiple factors including some static and dynamic loads,the temperature change and the contact.Tests show that the program is correct and reliable.The parallel computing program was then used to analyze the dynamic response of the water intake building of a nuclear station compared with the analyses using the ANSYS software with the computation time reduced from 20 h and 40 min under the single serial computer condition to 2 h and 15 min under the parallel computer condition.The results indicate that the parallel computation program has excellent parallelism degrees and efficiencies.
A parallel computation finite element method(FEM) program for nuclear power station structure dynamic response was developed with the LINUX operating system using the message passing interface(MPI) as the parallel computation environment to analyze nuclear power station complex structure earthquake dynamic response.The viscous-spring boundary condition was used to simulate the outward wave in the program with the explicit formulation in the time domain used to solve the equations,which can simulate the structural response on multiple factors including some static and dynamic loads,the temperature change and the contact.Tests show that the program is correct and reliable.The parallel computing program was then used to analyze the dynamic response of the water intake building of a nuclear station compared with the analyses using the ANSYS software with the computation time reduced from 20 h and 40 min under the single serial computer condition to 2 h and 15 min under the parallel computer condition.The results indicate that the parallel computation program has excellent parallelism degrees and efficiencies.
引文
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[6]刘晶波,李彬.三维黏-弹性静动力统一人工边界[J].中国科学(E辑),2005,35(9):966-980.LIU Jingbo,LI Bin.A unified viscous-spring artificialboundary for 3-D static and dynamic applications[J].Sciencein China:Series E,2005,35(9):966-980.(in Chinese)
[7]张国栋,陈飞,金星,等.边界条件设置及输入地震波特性对边坡动力响应影响分析[J].振动与冲击,2011,30(1):102-105.ZHANG Guodong,CHEN Fei,JING Xing,et al.Effect ofdifferent boundary conditions and seismic waves on seismicresponse of a slope[J].Journal of Vibration and Shock,2011,30(1):102-105.(in Chinese)
[8]唐菊珍.基于FEPG的组合网格法与接触问题的Lagrange乘子法[D].桂林:桂林电子科技大学,2006.Tang Juzhen.Combined grid method and Lagrange multipliermethod based on FEPG[D].Guilin:Guilin University ofElectronic Technology,2006.(in Chinese)
[9]刘书,刘晶波,方鄂华.动接触问题及其数值模拟的研究进展[J].工程力学,1999,16(6):14-28.LIU Shu,LIU Jingbo,FANG Ehua.The advances of studies onthe dynamic contact problem and its numerical methods[J].Engineering Mechanics,1999,16(6):14-28.(in Chinese)
[10]李久楷,朱俊,宁交贤.MPI并行计算性能的研究[J].四川大学学报:自然科学版,2009,46(6):1659-1662.LI Jiukai,ZHU Jun,NING Jiaoxian.Research on theperformance of MPI parallel computing[J].Journal ofSichuan University:Natural Science Edition,2009,46(6):1659-1662.(in Chinese)
[11]陈厚群.坝址地震动输入机制探讨[J],水利学报,2006,37(12):1417-1423.CHEN Houqun.Discussion on seismic input mechanism atdam site[J].Journal of Hydraulic Engineering,2006,37(12):1417-1423.(in Chinese)
[12]陈成军,柳阳,张元章,等.基于PANDA的并行显式有限元程序开发[J].计算力学学报,2011,4(28):204-207.CHEN Chengjun,LIU Yang,ZHANG Yuanzhang,et al.Programming of parallel explicit finite element based onPANDA[J].Chinese Journal of Computational Mechanics,2011,4(28):204-207.(in Chinese)
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