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Molluscan maggot material parameter acquisition method based on discrete elements

A parameter acquisition and discrete element technology, applied in the field of mechanical analysis, to achieve the effect of making up for the technical gap and solving the blank problem of physical parameters

Inactive Publication Date: 2019-04-16
周昕
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

At present, there are few reports on theoretically using the discrete element method to deal with the vibration separation of maggot particles, and there is no complete theoretical system for analyzing the mechanical problems of maggot particles during the separation process.

Method used

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Embodiment Construction

[0022] Working process of the present invention is as follows:

[0023] A discrete element-based soft material parameter acquisition method, including two parts: the acquisition of material physical parameters and the establishment of particle models; wherein the material physical parameters are material intrinsic parameters, material basic contact parameters and contact model parameters; material intrinsic parameters include Poisson's ratio, shear modulus, and density; material contact parameters include collision recovery coefficient, rolling friction coefficient, and static friction coefficient; contact model parameters are modeled; the particle model selects the soft ball model, including the following steps:

[0024] A discrete element-based method for acquiring soft material parameters, wherein the acquisition of material physical parameters includes the following steps.

[0025] Step A) The intrinsic parameters of the material include Poisson's ratio, shear modulus and ...

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Abstract

The invention provides a molluscan maggot material parameter acquisition method based on discrete elements. The method aims at solving problems existing in the prior art, and can be used for carryingout particle model analysis on a mixture of molluscan fly maggots and culture material particles by using a discrete element method and establishing a highly discrete molluscan particle model. The method has the beneficial effects that key parameters are provided for design of a maggot material separation vibrating screen, and practical research significance is achieved on separating of the maggotmaterial mixture by utilizing the vibrating screen.

Description

technical field [0001] The invention relates to the field of agricultural material screening, in particular to a mechanical analysis used in the material screening process. Background technique [0002] The discrete element method has been widely used in the motion analysis of discrete rigid elements. By carefully simulating the interaction of each discrete element, the mechanical problems in the contact process are analyzed. At present, there are few reports on theoretically using the discrete element method to deal with the vibration separation of maggots, and there is no complete theoretical system for analyzing the mechanical problems of maggot particles during the separation process. The maggot material model simulation analysis method based on the discrete element method of the present invention can make up for the gap in the theoretical basis of mechanical analysis of non-rigid bodies or soft particles in the vibration separation process of the discrete element partic...

Claims

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Application Information

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IPC IPC(8): G01N5/04G01N15/00G01N19/02G01N29/04G06F17/50G06T7/60A01K67/033
CPCA01K67/033G01N5/04G01N15/00G01N19/02G01N29/04G01N2291/023G06F30/20G06F2119/06G06T7/60
Inventor 周昕蔡静杨启志李雯
Owner 周昕
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