【摘要】 近年来我国大型结构抗震弹塑性分析得到了广泛应用,其中OpenSees作为一款开源有限元程序已逐渐成为最具国际影响力的计算平台之一。但是由于该软件的矩阵求解器效率较低,难以满足大型结构的计算需求。因此本文以GPU高性能求解为技术手段,在OpenSees中集成了两个基于迭代法的并行线性求解器,并通过两个大规模模型验证了基于GPU进行大型结构弹塑性分析的可靠性和高效性(加速比9~15),为进一步开展基于OpenSees的大型结构地震灾变行为研究提供了高效的计算方法。更多还原

【Abstract】 Numerical simulation using finite element(FE) software packages has been widely adopted to investigate the seismic performance of large-scale structures,recently. Among these,Open System for Earthquake Engineering Simulation(OpenSees),as an open-source FE software program,has increasingly become one of the most influential packages. However,the computational efficiency of the matrix solvers currently cannot satisfy the demand for numerical simulation of large-scale structures. Consequently,two new,parallel,iterative linear solvers are proposed and implemented in Open Sees based on two graphic processing unit-based( GPU-based) libraries. The time history analysis of two typical large-scale structures are performed using the proposed solvers. The speed-up ratio of the proposed solvers are up to 9 to 15(achieved with high accuracy in results). The research outcome can provide an effective computing technology for further numerical analysis of the seismic behavior of large-scale structures.更多还原