Lower limb simplification method of human body finite element model

By reconstructing the mesh of the lower limbs of the human body finite element model, simplifying the bone shell extraction and ligament, a simplification strategy was formulated, and the problem of low computational efficiency of the human body model in automobile collision tests was solved, achieving efficient simplification and accuracy of the lower limb model.

CN120124376APending Publication Date: 2025-06-10CHINA AUTOMOTIVE ENG RES INST
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Patent Information

Application Number
CN202510226555.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-02-27
Publication Date
2025-06-10

AI Technical Summary

Technical Problem

In automotive collision tests, due to the complexity of the human structure and the limitations of computing resources, it is unrealistic to directly model the entire human body with high precision, and a simplified lower limb model that can be used for optimized component-level verification is needed.

Method used

By analyzing the original lower limb model, simplification strategies are formulated, including mesh reconstruction, bone shell extraction, ligament simplification and counterweight adjustment, reducing the number and contact of the lower limbs, thereby shortening the computing time.

Benefits of technology

While maintaining the biomechanical characteristics and joint flexibility and freedom of the lower limbs of the human finite element model, it significantly reduces the number of grids and contact of the lower limbs, shortens the computing time, and provides a general model for the simplification of the lower limbs of various human models.

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Abstract

The invention relates to the technical field of collision testing, in particular to a lower limb simplification method of a human body finite element model, which comprises the following steps: S1, analyzing an original lower limb model and formulating a simplification strategy; s2, reconstructing and modifying a grid of the original lower limb model; s3, performing shell extraction treatment on the skeleton part; s4, performing simplification treatment on the ligament part; and S5, carrying out weight balancing and verification on the simplified part. According to the method, the mesh number and contact of the lower limbs can be reduced while the biomechanical characteristics of the lower limbs of the human body finite element model are kept and the flexibility and degree of freedom of joints are maintained, and the operation time of a large-number mesh human body finite element model is greatly shortened; meanwhile, a general mode of lower limb model simplification is provided, the method can be applied to various human body models for lower limb simplification, and research on human body injury biomechanics can be better promoted.
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