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

A Method for Identifying Kinetic Chain of Granular System

An identification method and dynamic chain technology, which can be used in image analysis, instruments, calculations, etc., and can solve problems such as unseen and opaque

Active Publication Date: 2016-01-27
QINGDAO TECHNOLOGICAL UNIVERSITY
View PDF6 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the photoelastic experiment carried out at this stage is only a model experiment, and the real particles cannot be measured by the photoelastic method due to their different shapes, textured surfaces and opaque materials. Therefore, the results of the photoelastic experiment can only be real sand particles. The force model and constitutive relationship of soil particles provide a reference, which is not enough for most practical projects to be directly adopted, and has certain limitations
At the same time, there is no relevant report on the actual measurement method of the kinetic chain of the real particle system

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 Method for Identifying Kinetic Chain of Granular System
  • A Method for Identifying Kinetic Chain of Granular System
  • A Method for Identifying Kinetic Chain of Granular System

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0033] In this embodiment, a plurality of steel bars with a circular section are loaded, and the dynamic chain of the steel bar section is extracted. The length of the steel bar is 2 cm, and the diameter is 5 mm. The specific steps are as follows:

[0034] (1) Uniform artificial speckle is sprayed on the end of the steel bar. The particle size of the artificial speckle is 0.2mm to 0.6mm. The artificial speckle is used as the carrier for the subsequent calculation of the digital image correlation method;

[0035] (2), put the steel bars randomly image 3In the shown experimental container, the container is fixed as a whole by the rigid tank 1 and the plexiglass 2 through the first screw 3, the thickness of the plexiglass 2 is changed according to the experimental conditions, and the distance between the plexiglass 2 and the rigid tank 1 is determined by Add a backing plate to adjust, and the experimental container can be fixed on the experimental platform by the second screw 4;...

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

PropertyMeasurementUnit
lengthaaaaaaaaaa
diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of granular system power transmission chain identification, and relates to a method for identifying a granular system power transmission chain. The method includes the steps that firstly, a granular system is loaded, and granular system images before and after deformation are collected to be used as an original image and a target image respectively; then, the original image and the target image are analyzed, and after a displacement field and a strain field in the granular system surface of the target image at the corresponding moment are obtained, the stress of each point is obtained according to the strain of each point in the strain field; afterwards, image edge detection is conducted on the target image, granular centroids are identified, the coordinates of the granular centroids and the position coordinates of contact points of all granules are read, a force equilibrium and torque equilibrium equation is established for each granule, and the size and orientation of contact force at different contact points on all the granules are acquired through calculation; at last, the contact force of each granule is drawn, and the graph which is continuously represented by the contact force between adjacent granules is the path of the power transmission chain. The method is simple, scientific in principle, convenient and flexible to use, high in practicability, large in development prospect and wide in applied range.

Description

Technical field: [0001] The invention belongs to the technical field of particle system force chain identification, and relates to a method for particle system power chain identification, which calculates macroscopic physical quantities such as particle force and displacement in real time, and realizes the identification and extraction of the particle system power chain. Background technique: [0002] As a complex system formed by the interaction of a large number of discrete particles, granular matter is ubiquitous in nature, daily life, and production. Its mechanical properties are between solids and liquids, and are far more complex than ordinary solids and liquids. Solid mechanics, fluid mechanics theory or condensed matter physics knowledge to explain. In 2005, granular matter and turbulent flow were listed as one of the 100 scientific problems by Science. The research on the basic mechanics of granular matter has become the frontier of science in recent years, and it i...

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): G01N15/00G06T7/00G06F19/00
Inventor 陈凡秀张慧新庄琦孔亮
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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