Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A two-dimensional deformable convex polygon block discrete element method based on distance potential function

A discrete element method, discrete element technology, applied in special data processing applications, design optimization/simulation, etc.

Active Publication Date: 2021-06-08
HOHAI UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the discrete element method of arbitrary convex polygonal block based on distance potential function is not deformable in the prior art, and a two-dimensional deformable convex polygonal block discrete element method based on distance potential function is provided to improve discrete Insufficiency of element method makes numerical simulation more realistic

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A two-dimensional deformable convex polygon block discrete element method based on distance potential function
  • A two-dimensional deformable convex polygon block discrete element method based on distance potential function
  • A two-dimensional deformable convex polygon block discrete element method based on distance potential function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0037] The invention provides a two-dimensional deformable convex polygon block discrete element method based on a distance potential function, comprising the following steps:

[0038] Step 1, establish a deformable discrete unit system, such as figure 1 As shown, this system includes multiple discrete units, and the finite units formed by dividing the discrete units into grids; each grid after the discrete units are divided into grids is defined as a grid unit, and the node coordinates of this grid unit Consistent with the node coordinates of the finite element, the parameters of the discrete element include the node coordinates, mass, damping ratio, and stiffness of the discrete element, and the parameters of the finite element include the node coordinates, mass matrix, damping matrix, and stiffness matrix of the finite element;

[0039] Step 2,...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a two-dimensional deformable convex polygon block discrete element method based on a distance potential function, comprising: establishing a deformable discrete element system, determining the time step of the system; calculating the relationship between each contact element and the target at the current time step The contact force of the element is converted into the equivalent nodal force vector of the load; the dynamic control equation in the incremental form of the system is established from the equivalent nodal force vector of the load, and the displacement of the finite element is obtained; according to the displacement of the finite element, update each finite element coordinate information; repeat the calculation until all time steps are calculated. This method realizes the deformability of the discrete element system, realizes the problems of contact detection and contact force calculation of units of different sizes and shapes, reduces the number of actual division units, improves the calculation efficiency, and enables the discrete element model to more accurately reflect the block. Internal stress and strain conditions can be used to simulate more practical engineering problems.

Description

technical field [0001] The invention relates to a two-dimensional deformable convex polygon block discrete element method based on a distance potential function, belonging to the technical field of deformable discrete elements. Background technique [0002] The discrete element method is a numerical simulation method specially used to solve discontinuous media problems. This method can accurately capture the discontinuous deformation characteristics of block systems such as separation, slip damage, and overturning rotation. Whereas deformable discrete elements can be compressed, separated or slid. Discrete element method can more realistically simulate the large deformation characteristics in rock mass, so discrete element method has been greatly developed in many fields such as theoretical research and engineering application. [0003] At present, Professor A.MUNJIZA from the United Kingdom proposes the finite discrete element method, which divides the research object into...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23
CPCG06F30/23
Inventor 赵兰浩邵琳玉刘勋楠李同春毛佳彭大伟
Owner HOHAI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com