大尺寸分布颗粒离散元数值计算中接触检测算法的改进研究

im at the disadvantage of the neighbor search algorithm in wide size distribution particle discrete element numerical calculation, the betterment grid method is put forward. The theories and solution ideas of the former algorithm and the betterment algorithm are analyzed. The differences in the efficiency and memory space between the two algorithms are compared. The superiority of the new algorithm is validated via the application in the simulation of carbon paste impact compaction. The method solves the low efficiency problem of contact detection algorithm in wide size distribution particle discrete element numerical calculation in some extent.