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Design method and system for constructing rapid parametric model of passenger's legs

A parametric model and design method technology, applied in design optimization/simulation, calculation, electrical digital data processing, etc., can solve the problem of low calculation efficiency of the upper finite element model, so as to solve the problem of low calculation efficiency, improve calculation efficiency, reduce The effect of computing time

Inactive Publication Date: 2019-08-20
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a fast parametric model design method and system for building the legs of the occupant, which solves the problems of low calculation efficiency of the upper finite element model in the prior art

Method used

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  • Design method and system for constructing rapid parametric model of passenger's legs
  • Design method and system for constructing rapid parametric model of passenger's legs
  • Design method and system for constructing rapid parametric model of passenger's legs

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Embodiment 1

[0081] see figure 1 As shown, the method for designing a fast parametric model of the passenger's leg of the present invention includes:

[0082] Step 1: Establish a geometric model of the leg skin;

[0083] In this embodiment, the geometric model of the occupant's leg is composed of skin, muscles, knee joints and bones, wherein the muscle is located between the skin and the bone, and the skin is the outermost layer of the geometric model of the leg.

[0084] In the present embodiment, the establishment of the leg skin geometric model described in step 1 includes:

[0085] Step 1.1, determine leg skin geometric characteristic parameters by CT scan data;

[0086] In this embodiment, the geometric characteristic parameters include but are not limited to: outer contour size and skin thickness, wherein the outer contour size refers to the outer contour of the leg.

[0087] In step 1.2, a geometric model is established according to the geometric characteristic parameters of the ...

Embodiment 2

[0128] see Figure 7 As shown, the rapid parametric model design system for building occupants' legs of the present invention includes: a skin geometric model building module 71, a leg geometric model building module 72, a unit attribute setting module 73 and a finite element model optimization module 74, wherein,

[0129] The skin geometric model building module 71 is connected with the leg geometric model building module 72 , the leg geometric model building module 72 is connected with the unit attribute setting module 73 , and the unit attribute setting module 73 is connected with the finite element model optimization module 74 .

[0130] Skin geometric model building block 71, used to set up leg skin geometric model;

[0131] In this embodiment, the geometric model of the occupant's leg is composed of skin, muscles, knee joints and bones, wherein the muscle is located between the skin and the bone, and the skin is the outermost layer of the geometric model of the leg.

[...

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Abstract

The invention relates to a design method and system for constructing a passenger leg rapid parameterized model, and belongs to the field of automobile collision safety. The method comprises the following steps: constructing a leg skin geometrical model; performing equivalent processing on muscle tissues, a knee joint structure and a skeleton structure based on the leg skin geometrical model to obtain a leg geometrical model; setting physical attributes for a skin structure, an equivalent skeleton structure, a muscle structure and the knee joint structure in the leg geometrical model respectively to obtain a passenger leg finite element model; performing parameter optimization design on the passenger leg finite element model: further optimizing relevant parameters of the leg finite element model. By adopting the design method and system, the calculation time can be shortened greatly, and the automobile safety simulation analysis and calculation efficiency is increased, so that the problem of low calculation efficiency of the conventional finite element model is solved.

Description

technical field [0001] The invention relates to the field of automobile collision safety, and relates to a design method and system for constructing a fast parametric model of a passenger's leg. Background technique [0002] Automobile is one of the most important inventions of mankind in the 20th century. While automobiles bring convenience to human transportation and life, the subsequent automobile traffic accidents have also begun to endanger human life. Therefore, in traffic accidents, It is also becoming more and more important to conduct targeted improvements to ensure safety by studying the degree of occupant injury. Statistics from the National Automotive Sampling System (NASS) in the United States show that among occupant injuries, about 1 / 5 of occupant injuries and 4 / 5 of pedestrian injuries include leg injuries, and leg injuries occur in various parts of occupants in second place. The results of statistical analysis on the injuries of occupants protected by seat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 谢书港赵宏伟梁平闫磊徐涛郭昊添
Owner JILIN UNIV
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