公开(公告)号：US09697307B2

公开(公告)日：2017-07-04

申请号：US15334100

申请日：2016-10-25

Applicant: COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATION

Inventor： Paul William Cleary

IPC: G06G7/48 ,  G06F17/50

CPC classification number: G06F17/5009 ,  G06F2217/16

Abstract: A discrete element method for modelling granular or particulate material, the method including a multiple grid search method wherein the multiple grid search method is a hierarchical grid search method, and wherein entities, such as particles and boundary elements, are allocated to cells of respective grids based on size. The search method further includes: (a) performing a search of cells in a first of the grid levels to determine pairs of entities which satisfy predetermined criteria to be included in a neighbor list for which both entities belong to the first grid level; (b) mapping each nonempty cell in the first grid level to each of the other grid levels, determining neighboring cells in each of the other grid levels and determining all pairs of entities belonging to pair of levels that satisfy the predetermined criteria for inclusion in the neighbor list; and (c) repeating (a) and (b) for all grid levels.

公开(公告)号：US20170046461A1

公开(公告)日：2017-02-16

申请号：US15334100

申请日：2016-10-25

Applicant: COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATION

Inventor： Paul William Cleary

IPC: G06F17/50

CPC classification number: G06F17/5009 ,  G06F2217/16

Abstract: A discrete element method for modelling granular or particulate material, the method including a multiple grid search method wherein the multiple grid search method is a hierarchical grid search method, and wherein entities, such as particles and boundary elements, are allocated to cells of respective grids based on size. The search method further includes: (a) performing a search of cells in a first of the grid levels to determine pairs of entities which satisfy predetermined criteria to be included in a neighbour list for which both entities belong to the first grid level; (b) mapping each nonempty cell in the first grid level to each of the other grid levels, determining neighbouring cells in each of the other grid levels and determining all pairs of entities belonging to pair of levels that satisfy the predetermined criteria for inclusion in the neighbour list; and (c) repeating (a) and (b) for all grid levels.

Abstract translation: 一种用于对粒状或颗粒材料进行建模的离散元素方法，该方法包括多网格搜索方法，其中多网格搜索方法是分层网格搜索方法，并且其中诸如粒子和边界元素的实体被分配给各个网格的小区 基于大小。 所述搜索方法还包括：（a）对所述网格级中的第一网格级别的小区进行搜索，以确定满足预定准则的实体对，以包含在所述两个实体属于所述第一网格级的邻居列表中; （b）将第一网格级别中的每个非空单元映射到每个其他网格级别，确定每个其他网格级别中的相邻小区，并且确定属于满足预定标准的一对级别的所有实体对对，以包含在 邻居名单 和（c）对于所有电网电平重复（a）和（b）。