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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。
In order to analyze the dynamic response of complex structure of nuclear power plant to earthquake, MPI is used as the basic parallel programming environment. Under LINUX operating system, parallel finite element program of dynamic response of nuclear power station structure is developed. The program uses the viscoelastic boundary to simulate the radiation from the external waves to the far-field foundation. The solution of the equation uses the explicit solution of the time-domain method, which can simulate the structural response under various static and dynamic loads, including temperature, contact and other factors. The example verified that the program is correct and reliable. Using this program, the dynamic response analysis of a nuclear power station intake structure was carried out and compared with the ANSYS software analysis. The time taken for it to decrease from 20h40min to 2h15min under the parallel program. The results show that the parallel program has high parallelism and good parallel efficiency.