A method for constructing a breakable grain particle discrete element simulation model

Abstract

The invention discloses a method for constructing a breakable grain particle discrete element simulation model. The method comprises the following steps that 1, measuring the three-dimensional characteristic size of grain particles; 2, generating a grain particle three-dimensional model by using a computer; 3, preliminarily establishing a grain particle discrete element simulation model through discrete element software; 4, introducing a virtual cylinder bonding key into the discrete element simulation model obtained in the step 3; 5, taking a force and deformation curve obtained by a conventional physical and mechanical test as a target; repeatedly adjusting mesoscopic parameters of the discrete element simulation model; the force obtained by calculation and actual measurement of the simulation model is matched with the deformation curve; according to the method, the characteristic that the cereal grains have crushable and viscoelastic mechanical properties is considered at the same time, so that the discrete element simulation model of the cereal grains is closer to actual cereal grains, and the method can be widely applied to cereal grain crushing mechanism research in the grainprocessing process.

Description

technical field [0001] The invention relates to the technical field of numerical simulation of a grain processing process, in particular to a method for constructing a discrete element simulation model of breakable grain particles. Background technique [0002] In the process of grain processing, there are extensive interactions between grain particles and between grain particles and processing equipment, such as extrusion, shearing, impact, etc. However, during the interaction process, grain particles will be broken due to external loads exceeding their own limit strength. As far as grain processing such as corn slag production and wheat flour production is concerned, the crushing of grain particles will help to improve its eating taste, improve the human body's ability to absorb its nutrients, maximize the efficacy of functional components in grains, and improve the quality of grains. added value. On the contrary, for grain processing such as rice milling and sorghum ric...

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Problems solved by technology

According to the available literature and patent materials, the establishment of a discrete element simulation model for breakable grain particles from the perspective of viscoelastic properties has not been reported yet.

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