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Simulation and analysis method of particle system based on composite hyperellipsoid model

A technology of simulation analysis and super ellipsoid, which is applied in the field of granular systems, can solve problems such as inaccurate simulation results, and achieve the effect of improving authenticity and improving production efficiency

Active Publication Date: 2020-11-24
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to provide a simulation analysis method for a particle system based on a combined hyperellipsoid model, which solves the inaccurate simulation results caused by the inconsistency between the construction of the particle model and the real particle; improves the simulation of the particle system The authenticity of the results meets the needs of actual simulation; the application of simulation results to actual industrial processes improves production efficiency

Method used

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  • Simulation and analysis method of particle system based on composite hyperellipsoid model
  • Simulation and analysis method of particle system based on composite hyperellipsoid model
  • Simulation and analysis method of particle system based on composite hyperellipsoid model

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Embodiment 1

[0056] The particles in the particle system are drug particles, and the shape is capsule particles.

[0057] (1) According to the size and shape of the real particle, determine the shape, size and number of the sub-hyperellipsoids that make up the particle.

[0058] For real capsule-like particles, such as image 3 As shown, by measuring the size of real particles, the particle size data can be obtained. The total length is 12mm, and the diameter of the spheres on both sides is 4mm; It is two spheres and a cylindrical particle, the diameter of the sphere is 4mm, the diameter of the cylindrical particle is 4mm, and the height is 8mm.

[0059] (2) Construct sub-hyperellipsoids through super-ellipsoid models, and then assign different coordinate positions to sub-hyperellipsoid particle models according to the size of real particles, and combine sub-hyperellipsoids to form a combined hyperellipsoid model of particles.

[0060] Build process like image 3 As shown, according to ...

Embodiment 2

[0065] Like the drug particles provided in Example 1, the drug particles in this embodiment are cylindrical particles that protrude on both sides.

[0066] Such as Figure 4 As shown, by measuring the size of the real particle, the size data of the particle can be obtained, the diameter is 8mm, the height is 4mm, and the height of the cylindrical section is 2mm; according to the measured data, all the required sub-hyperellipsoid particle models are constructed, What this particle requires are two ellipsoidal particles and one cylindrical particle. According to the hyperellipsoid model particle formula, for ellipsoidal particles, a=b=4, c=1, s 1 =s 2 =2, for cylindrical particles, a=b=4, c=1, s 1 =20,s 2 =2; combine all sub-hyperellipsoidal particles obtained, the center coordinates of cylindrical particles are (0,0,0), and the coordinates of two ellipsoidal particles are (0,0,1) and (0,0 ,-1), through the combination of three sub-hyperellipsoid particle models, the real cy...

Embodiment 3

[0070] As shown in Example 2, the drug particles in this example are elliptical cylindrical particles that protrude on both sides: as Figure 5 As shown, two ellipsoids plus one elliptic cylinder can be combined to form a kind of elliptical cylindrical particle with two sides protruding. The simulation results obtained by using the combined hyperellipsoid model are closer to the actual data than those obtained by using the combined sphere model.

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Abstract

Disclosed by the present invention is a simulation analysis method for a particle system based on a combined hyperellipsoid model, comprising the following steps: (1) according to the size and shape of an actual particle, determining the shape, size and number of sub-hyperellipsoids constituting a particle; (2) constructing the sub-hyperellipsoids by means of a hyperellipsoid model, assigning a sub-hyperellipsoid model different coordinate locations according to the size of the actual particle, combining the sub-hyperellipsoids, and constructing a combined hyperellipsoid model of the particle; and (3) applying the combined hyperellipsoid model obtained in step (2) to discrete element simulation, and simulating a particle system in an industrial process to obtain a simulation result. The simulation analysis method provided by the present invention solves a simulation result being inaccurate due to the problem wherein the construction of a particle model does not comply with an actual particle, improves the reality of a simulation result of a particle system, satisfies the requirements of actual simulation, and applies a simulation result to the actual industrial process, thereby increasing production efficiency.

Description

technical field [0001] The invention relates to the field of particle systems, in particular to a simulation analysis method for particle systems based on a combined hyperellipsoid model. Background technique [0002] There are a large number of granular materials in nature, and obtaining the law of particle motion is of great significance for improving many industrial processes. Discrete element method is a relatively main simulation method for studying granular systems, and the accuracy of granular model has a great influence on the simulation results. The modeling between spherical particles is relatively simple, but for some non-spherical particles, the particle models mainly used at present mainly include hyperellipsoid model, combined sphere model, polyhedron model, etc. [0003] For the above particle models, there are certain shortcomings and deficiencies: [0004] The combined ball model is to realize the construction of complex particles by combining spherical pa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20
CPCG06F30/20
Inventor 赵永志刘子寒尤瑛
Owner ZHEJIANG UNIV
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