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Simulation analysis method of particle system based on combined hyperellipsoidal 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: 2019-03-08
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 analysis method of particle system based on combined hyperellipsoidal model
  • Simulation analysis method of particle system based on combined hyperellipsoidal model
  • Simulation analysis method of particle system based on combined hyperellipsoidal model

Examples

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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 the obtained self-hyperellipsoidal particles, 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 re...

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

The invention discloses a simulation analysis method of a particle system based on a combined hyperellipsoid model, comprising the following steps of (1) according to the size and shape of a real particle, determining the shape, size and number of sub-hyperellipsoids constituting the particle; (2) constructing the sub-super ellipsoid by the super-ellipsoid model, then giving the sub-super ellipsoid model different coordinate positions according to the real particle size, and combining the sub-super ellipsoid to form the combined super-ellipsoid model of the particle; (3) applying the combinedhyper-ellipsoidal model obtained in step (2) to the discrete element simulation to simulate the particle system in the industrial process, and obtaining the simulation results. The simulation analysismethod provided by the invention solves the problem that the simulation result is inaccurate because the construction of the particle model is inconsistent with the real particle. The authenticity ofthe simulation results of the particle system is improved, and the actual simulation needs are met. The simulation results are applied to the actual industrial process, and the production efficiencyis improved.

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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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 赵永志刘子寒尤瑛
Owner ZHEJIANG UNIV
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