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Search domains for dynamic localization in numerical simulations of collision events between two bodies

A numerical simulation and domain search technology, applied in special data processing applications, geometric CAD, design optimization/simulation, etc., can solve problems such as impractical calculation time simulation

Active Publication Date: 2020-03-10
LIVERMORE SOFTWARE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In some cases, the increased computation time can render the simulations impractical (each simulation typically takes an overnight execution to complete)

Method used

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  • Search domains for dynamic localization in numerical simulations of collision events between two bodies
  • Search domains for dynamic localization in numerical simulations of collision events between two bodies
  • Search domains for dynamic localization in numerical simulations of collision events between two bodies

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0017] figure 1 is a flowchart of an exemplary process 100 for using a dynamically positioned search domain in a time-marched numerical simulation of a collision event between two objects in accordance with an embodiment of the present invention. Process 100 is preferably understood in conjunction with the other figures and implemented in software.

[0018] Process 100 begins at step 102, where a computer system (e.g., Figure 6 A computer 600 is shown receiving a first computer model representing a first object and a second computer model representing a second object. In one embodiment, the first object is a fixed obstacle and the second object is a car. The second computer model may be a finite element analysis (FEA) model defined using a plurality of nodes connected by finite elements. Application modules (eg, FEA application modules) are installed on the computer system.

[0019] Next, at step 104, a search domain to be used in a time-marching simulation of a collision...

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PUM

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Abstract

Dynamically-positioned search domain in a time-marching numerical simulation of automobile crashworthiness is disclosed. A first computerized model representing a first object and a second computerized model (e.g., FEA model) representing a second object are received in a computer system. A time-marching numerical simulation of an impact event between the first and the second objects is conducted. Based on user-specified parameters, a search domain representing three-dimensional space of interest for detecting contacts between first and second objects is established. At each solution cycle of the time-marching simulation, search domain is repositioned as the second model deforms. Structural behaviors obtained in time-marching numerical simulation include effects from detected contacts within the search domain. Any finite element having broken free from the FEA model and being located outside of the search domain is excluded from further detection of contacts and deleted from the calculation in the simulation.

Description

technical field [0001] The present invention relates generally to computer aided engineering analysis, and more particularly to search domains for dynamic positioning in numerical simulations of collision events between two objects. Background technique [0002] Computer Aided Engineering (CAE) has been used to support engineers in many tasks. For example, in product design programs, CAE analysis, especially finite element analysis (FEA), has been frequently used to obtain and evaluate simulated structural responses (e.g., stress, displacement, Wait). [0003] FEA is a computer method widely used in industry to simulate (ie, model and solve) engineering problems related to complex products or systems (eg, automobiles, aircraft, etc.), such as three-dimensional nonlinear structural design and analysis. FEA takes its name from the way in which the geometry of the object under consideration is specified. Geometry is defined by finite elements (or elements) and nodes. There ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F30/15
CPCG06F30/15G06F30/23
Inventor 约翰·奥·哈尔奎斯特
Owner LIVERMORE SOFTWARE TECH