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Modeling method of high-quality grid miniature pig head finite element model

A modeling method and finite element technology, applied in the field of high-quality mesh small pig head finite element model modeling, can solve problems such as low-quality mesh and affecting model calculation accuracy, and achieve good fitting and accurate head Damage, high quality effect

Pending Publication Date: 2020-12-11
BEIJING JIAOTONG UNIV +1
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Problems solved by technology

[0006] In order to solve the problem that traditional modeling methods produce low-quality grids at positions with large curvatures and affect the calculation accuracy of the entire model, this invention provides a modeling method for a small pig head finite element model with high-quality grids, which is applicable to For all irregular surface biological structures, the model has a better degree of integrity and higher quality

Method used

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  • Modeling method of high-quality grid miniature pig head finite element model
  • Modeling method of high-quality grid miniature pig head finite element model
  • Modeling method of high-quality grid miniature pig head finite element model

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Embodiment Construction

[0061] Such as Figure 1 to Figure 5 As shown, a high-quality grid minipig head finite element model modeling method includes the following steps:

[0062] S1. Using the tomographic image reconstruction method to establish a geometric model of the head of a newborn piglet;

[0063] S2, partitioning the geometric model of the head of the newborn piglet;

[0064] S3. A finite element model of the head of the newborn piglet is established by using the butterfly grid projection method.

[0065] The specific steps of the step S1 are as follows:

[0066] S11. Acquiring the CT image of the head of the newborn miniature pig

[0067] A CT cross-sectional scan image of the head of a newborn piglet is obtained to obtain a CT image of the head of a newborn miniature pig.

[0068] S12. Perform threshold segmentation, region growth and three-dimensional modeling on the CT image of the head of the newborn minipig to obtain a three-dimensional model STL format file of the head of the newb...

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Abstract

The invention relates to a modeling method, and in particular relates to a modeling method of a high-quality grid miniature pig head finite element model. The method comprises the steps of establishing a newborn piglet head geometric model by adopting a tomographic image reconstruction method; and repartitioning the geometric model. The newborn piglet head finite element model is established by adopting a butterfly grid projection method. The method can be applied to all irregular curved surface body biological structures, multi-working-condition simulation can be further carried out, data such as collision contact force and skull crack propagation can be obtained, and compared with a multi-working-condition test carried out by using a miniature pig, the method is more convenient and efficient, and can describe the head injury of children more accurately.

Description

technical field [0001] The invention relates to a modeling method, in particular to a modeling method for a finite element model of a small pig head with a high-quality grid. Background technique [0002] According to statistics, among the second-degree and above injuries of various parts of children's bodies, head injuries of children under 3 years old account for 50% or even higher of the injuries of various parts of the body. In order to study the injury mechanism and protective measures of children's heads, it is the most effective means to use children's corpses to carry out collision tests. However, due to limitations of moral and ethical factors, it is difficult to use children's corpses as samples for research on children's skull injuries. Since the structure and position of the tissues and organs in the head of minipigs are very close to those of children, and there is a certain corresponding relationship with the mechanical properties of human heads in terms of ag...

Claims

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Application Information

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IPC IPC(8): G06T17/20
CPCG06T17/20
Inventor 李志刚宿仲情白春玉王亚锋郭亚周王计真刘小川
Owner BEIJING JIAOTONG UNIV
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