CN-121980890-A - Wall surface abrasion simulation method, device, equipment and medium irrelevant to grid size

CN121980890ACN 121980890 ACN121980890 ACN 121980890ACN-121980890-A

Abstract

The application relates to the technical field of numerical simulation, in particular to a wall abrasion simulation method, device, equipment and medium irrelevant to the grid size, which comprises the steps of obtaining a model file of a structure and a background grid irrelevant to the surface patch unit size of the model file; the method comprises the steps of obtaining collision contact points between scattered particles and the wall surface of a structure and wall surface abrasion volumes generated by the collision contact points due to the collision contact through simulation, accumulating the wall surface abrasion volumes of first grid nodes closest to the collision contact points in a background grid according to the wall surface abrasion volumes generated by the collision contact points due to the collision contact, and carrying out abrasion diffusion on the wall surface of the structure according to the latest accumulated wall surface abrasion volumes of second grid nodes corresponding to sampling points in the background grid to obtain a distribution cloud image of abrasion depth on the wall surface grid. The application can provide a mode which is irrelevant to the size of the surface patch unit of the model file to simulate the wall surface abrasion, thereby improving the accuracy of abrasion prediction and engineering applicability.

Inventors

HE YI
GUO SILIANG
ZHANG TENGFANG
KU QUAN
ZHANG RIKUI

Assignees

深圳十沣科技有限公司

Dates

Publication Date: 20260505
Application Date: 20260408

Claims (10)

1. A method of simulating wall wear independent of mesh size, the method comprising: Acquiring a fixed wall boundary model file of a structure and a background grid which is irrelevant to the size of a patch unit of the fixed wall boundary model file and surrounds the fixed wall boundary of the structure; Performing collision simulation on the solid wall boundary model in the solid wall boundary model file by adopting a discrete unit method to obtain collision contact points between discrete particles and the wall surface of the structure in the current simulation time step and the current wall surface abrasion volume generated by collision contact of the collision contact points; Accumulating the wall surface abrasion volume of a first grid node closest to the collision contact point in the background grid according to the current wall surface abrasion volume of the collision contact point due to collision contact; And carrying out abrasion diffusion on the wall surface of the structure according to the latest accumulated wall surface abrasion volume of the second grid node corresponding to the sampling point in the background grid to obtain a distributed cloud image of the abrasion depth on the wall surface grid, wherein the distance between the sampling point and the corresponding second grid node is smaller than or equal to a preset abrasion diffusion radius.
2. The grid-size-independent wall wear simulation method according to claim 1, wherein a background grid that is independent of the patch cell size of the fixed wall boundary model file and surrounds a fixed wall boundary of the structure is obtained by: Calculating node distances corresponding to the background grids according to the preset minimum size of the dispersion particles; Determining a minimum geometric bounding box of the solid wall boundary model according to the geometric dimension of the solid wall boundary model file; and carrying out background grid division on the inside of the geometric bounding box according to the node spacing to obtain the background grid.
3. The mesh size independent wall wear simulation method of claim 1, wherein performing collision simulation on a solid wall boundary model in the solid wall boundary model file by using a discrete unit method to obtain a current wall wear volume of the collision contact point due to collision contact comprises: Performing collision simulation on the solid wall boundary model in the solid wall boundary model file by adopting a discrete unit method to obtain the sliding distance of the discrete particles on the wall surface of the structure and the interaction force of the collision of the discrete particles and the structure; And calculating the abrasion volume of the secondary wall surface generated by collision contact of the collision contact point according to the sliding distance of the dispersion particles on the wall surface of the structure and the interaction force of the collision of the dispersion particles and the structure.
4. The mesh size independent wall wear simulation method of claim 1, wherein the first mesh node closest to the collision contact point is determined by the following formula: ; Wherein, the For the coordinates of the first mesh node, Is the X-axis coordinate of the first grid node, Is the Y-axis coordinate of the first grid node, Is the Z-axis coordinate of the first grid node, Indicating that the result is rounded off, To hit the X-axis coordinates of the contact point, To hit the Y-axis coordinate of the contact point, To hit the Z-axis coordinate of the contact point, Is the starting point of the background grid Is defined by the X-axis coordinates of (c), Is the starting point of the background grid Is set to be a coordinate of the Y-axis of (c), Is the starting point of the background grid Is defined by the Z-axis coordinate of (c), And the node distance corresponding to the background grid.
5. The method for simulating wall wear independent of grid size according to claim 1, wherein said performing wear diffusion on the wall of the structure according to the latest accumulated wall wear volume of the second grid node corresponding to the sampling point in the background grid to obtain a cloud image of the distribution of the wear depth on the wall grid comprises: judging whether the current simulation time step is a preset output time step of wall surface abrasion simulation or not; And if so, carrying out abrasion diffusion on the wall surface of the structure according to the latest accumulated wall surface abrasion volume of the second grid node corresponding to the sampling point in the background grid, and obtaining a distribution cloud image of the abrasion depth on the wall surface grid.
6. The method for simulating wall wear regardless of grid size according to claim 1 or 5, wherein the performing wear diffusion on the wall of the structure according to the latest accumulated wall wear volume of the second grid node corresponding to the sampling point in the background grid to obtain a distributed cloud image of the wear depth on the wall grid comprises: for each second grid node, calculating the abrasion influence degree value of the second grid node on the corresponding sampling point according to the distance between the second grid node and the corresponding sampling point; and taking the abrasion influence degree value of each second grid node corresponding to the sampling point as a weight, and carrying out weighted summation on the latest accumulated wall abrasion volumes of all the second grid nodes to obtain the abrasion depth of the distribution cloud chart at the sampling point.
7. The grid-size-independent wall wear simulation method according to claim 6, wherein the calculating the wear influence degree value of the second grid node on the corresponding sampling point according to the distance between the second grid node and the corresponding sampling point comprises: substituting the distance between the second grid node and the corresponding sampling point into a diffusion function, and calculating the abrasion influence degree value of the second grid node on the corresponding sampling point; The diffusion function satisfies the following condition: ; ; ; Wherein, the The abrasion influence degree value is the abrasion influence degree value when the distance between the second grid node and the corresponding sampling point is 0; the maximum abrasion influence degree value is preset; For the distance between the second grid node and the corresponding sampling point is R is a preset wear diffusion radius; distance between the second grid node and the corresponding sampling point; is the azimuth angle of the second grid node relative to the corresponding sampling point.
8. A wall wear simulation device independent of mesh size, the device comprising: the device comprises an acquisition module, a display module and a display module, wherein the acquisition module is used for acquiring a fixed wall boundary model file of a structure and a background grid which is irrelevant to the size of a patch unit of the fixed wall boundary model file and surrounds the fixed wall boundary of the structure; the computing module is used for carrying out collision simulation on the solid wall boundary model in the solid wall boundary model file by adopting a discrete unit method to obtain collision contact points between discrete particles and the wall surface of the structure in the current simulation time step and the current wall surface abrasion volume generated by the collision contact points due to collision contact; The computing module is further configured to accumulate wall wear volumes of first grid nodes closest to the collision contact point in the background grid according to the present wall wear volumes generated by the collision contact point due to collision contact; The computing module is also used for continuing the collision simulation of the next simulation time step, carrying out abrasion diffusion on the wall surface of the structure according to the latest accumulated wall surface abrasion volume of the second grid node corresponding to the sampling point in the background grid to obtain a distributed cloud image of the abrasion depth on the wall surface grid, wherein the distance between the sampling point and the corresponding second grid node is smaller than or equal to the preset abrasion diffusion radius.
9. An electronic device comprising a processor, a storage medium and a bus, the storage medium storing machine-readable instructions executable by the processor, the processor in communication with the storage medium via the bus when the electronic device is in operation, the processor executing the machine-readable instructions to perform the steps of the grid-size-independent wall wear simulation method of any one of claims 1 to 7.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program which, when executed by a processor, performs the steps of the grid-size-independent wall wear simulation method according to any one of claims 1 to 7.

Description

Wall surface abrasion simulation method, device, equipment and medium irrelevant to grid size Technical Field The invention relates to the technical field of numerical simulation, in particular to a wall surface abrasion simulation method, device, equipment and medium irrelevant to grid size. Background Numerical simulation is an important means for studying interactions between discrete particles and structures, and physical quantities that cannot be obtained by the test can be obtained through numerical simulation. For the simulation of wall wear, the discrete unit Method (DISCRETE ELEMENT Method, DEM) is one of the most dominant numerical methods. DEM characterizes discrete particles by spherical or non-spherical discrete elements, describing the geometry of the structure using a CAD model file (e.g., STL/OBJ format) based on mesh patches, where the mesh patch elements themselves have specific dimensions. When the traditional DEM method is adopted for abrasion prediction, a surface patch unit where abrasion occurs is positioned according to an impact contact point of particles and a structural object wall surface, and the abrasion volume generated by single impact is divided by the area of the surface patch unit to be used as the average abrasion depth of the surface patch unit. However, there are significant limitations to the conventional approach. The wear volume resulting from the impact is recorded only on the single panel element where the impact point is located. When the size of the patch unit of the structure model changes, even if the total wear volume remains unchanged, the calculation result of the average wear depth changes accordingly, resulting in a simulation result that does not conform to the actual physical wear distribution. Disclosure of Invention Accordingly, the present application aims to provide a wall wear simulation method, device, equipment and medium, which are independent of grid size, and can perform wall wear simulation in a manner independent of the panel unit size of a fixed wall boundary model file, eliminate the influence of the structure panel size on simulation results, and improve the accuracy of wear prediction and engineering applicability. In a first aspect, an embodiment of the present application provides a wall wear simulation method independent of grid size, where the method includes: Acquiring a fixed wall boundary model file of a structure and a background grid which is irrelevant to the size of a patch unit of the fixed wall boundary model file and surrounds the fixed wall boundary of the structure; Performing collision simulation on the solid wall boundary model in the solid wall boundary model file by adopting a discrete unit method to obtain collision contact points between discrete particles and the wall surface of the structure in the current simulation time step and the current wall surface abrasion volume generated by collision contact of the collision contact points; Accumulating the wall surface abrasion volume of a first grid node closest to the collision contact point in the background grid according to the current wall surface abrasion volume of the collision contact point due to collision contact; And carrying out the abrasion diffusion on the wall surface of the structure according to the latest accumulated wall surface abrasion volume of the second grid node corresponding to the sampling point in the background grid to obtain a distributed cloud image with abrasion depth on the wall surface grid, wherein the distance between the sampling point and the corresponding second grid node is smaller than or equal to a preset abrasion diffusion radius. In one possible embodiment, a background mesh is obtained that is independent of the patch cell size of the solid wall boundary model file and surrounds the solid wall boundary of the structure by: Calculating node distances corresponding to the background grids according to the preset minimum size of the dispersion particles; Determining a minimum geometric bounding box of the solid wall boundary model according to the geometric dimension of the solid wall boundary model file; and carrying out background grid division on the inside of the geometric bounding box according to the node spacing to obtain the background grid. In one possible implementation manner, performing collision simulation on the solid wall boundary model in the solid wall boundary model file by adopting a discrete unit method to obtain the present wall abrasion volume of the collision contact point due to collision contact, including: Performing collision simulation on the solid wall boundary model in the solid wall boundary model file by adopting a discrete unit method to obtain the sliding distance of the discrete particles on the wall surface of the structure and the interaction force of the collision of the discrete particles and the structure; And calculating the abrasion volume of the secondary wall surface generated by colli