离散元与有限元耦合的时空多尺度计算方法

Time and space multiscale numerical method by coupling discrete element method and finite element method

采用力学与动力学参数传递以及权值分配法,建立了离散元与有限元耦合的时空多尺度计算方法。弹性应力波传播算例模拟结果表明,时空多尺度计算方法具有时间与空间多尺度双重优势,有效提高了数值计算效率,并且模拟结果满足精确性要求。同时,将这一多尺度计算方法应用于激光辐照下受拉铝板破坏行为的数值模拟中,得到的模拟结果与实验结果基本一致。

Through mechanical and dynamic parameters transition and weight value distribution,a time and space multiscale numerical method by coupling Discrete Element Method(DEM) and Finite Element Method(FEM) was proposed.Simulation of an example of elastic stress-wave propagation was carried out.The results show that the multiscale numerical method possesses the dual superiorities of multiscale time and multiscale space,which significantly improve the efficiency of simulation.It is shown that the simulation results...