Hybrid unit capable of solid/sph coupling

A technology of mixed units and solid units, applied in design optimization/simulation, special data processing applications, instruments, etc., can solve problems such as connections that do not conform to actual conditions

Active Publication Date: 2011-11-30
LIVERMORE SOFTWARE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, random placement of these rigid links can lead to very impractical connections as they deform in unpredictable ways

Method used

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  • Hybrid unit capable of solid/sph coupling
  • Hybrid unit capable of solid/sph coupling
  • Hybrid unit capable of solid/sph coupling

Examples

Experimental program
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Embodiment Construction

[0020] First refer to figure 1 , is a schematic diagram of various exemplary mixing units according to one embodiment of the present invention. The blend unit consists of two parts: the solid layer and the corresponding particle layer. A solid layer includes FEM-based solid elements, while a corresponding particle layer includes one or more SPH-based particles. Solid elements include, but are not limited to, hexahedrons, wedges, and tetrahedra. Mixed cell 110 is a hexahedron containing one corresponding particle, cell 120 is a wedge-shaped cell containing one particle, and cell 130 is a tetrahedron containing one particle. Exemplary mixing cells containing more than one particle are shown as cell 140 containing 8 particles, cell 150 containing 6 particles, and cell 160 containing 4 particles. Other numbers of particles can also be realized in other embodiments according to the invention. For example, a hexahedron (not shown) containing 27 particles.

[0021] The coupling ...

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PUM

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Abstract

Hybrid elements (110, 120, 130, 140, 150, 160) that enable coupling effects (510) between SPH particles and FEM solid elements are disclosed. According to one aspect of the present invention, hybrid elements (110, 120, 130, 140, 150, 160) are configured to facilitate coupling effect (510) of solid element based on finite element method, FEM, and one or more corresponding particles based on smoothed particle hydrodynamics, SPH. Hybrid elements (110, 120, 130, 140, 150, 160) are defined in a computer aided engineering grid model (220) as a buffer or interface between the SPH particles and FEM solid elements. For example, a portion of the grid model (220) comprises SPH particles because the likelihood of enduring large deformation, while the rest of the model comprises FEM solid elements. Hybrid elements are placed between the solid elements and the particles. Each hybrid element further comprises two layers: a solid layer and a particle layer.

Description

technical field [0001] The present invention relates generally to computer-aided engineering analysis, and more particularly to the use of solid elements based on the finite element method (FEM) in combination with particles based on smoothed particle hydrodynamics (SPH) to conduct large deformation analysis of structures. A method and system for time-push simulation (for example, car crash or explosion simulation), wherein at least one layer of hybrid cells is established between the solid cells and SPH particles to achieve coupling. Background technique [0002] Continuum mechanics has been used to simulate continuous matter such as solids and fluids (i.e. liquids and gases). Differential equations are used to solve problems in continuum mechanics. A large number of numerical methods are already in use. One of the most common methods is finite element analysis (FEA) or finite element method (FEM), which is a computerized method widely used in industry to analyze problems...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCY02T10/82G06F2217/16G06F17/5018G06F30/23G06F2111/10
Inventor 陈皓许敬晓王季先
Owner LIVERMORE SOFTWARE TECH
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