一种具有高效计算稳定性的新型有限元人体模型建模方法：在行人安全分析中的应用。
A novel modeling approach for finite element human body models with high computational efficiency and stability: application in pedestrian safety analysis.
机构信息
School of Mechanical Engineering, Hunan University of Science and Technology, Xiangtan, China.
Shanghai Key Laboratory of Forensic Medicine, Academy of Forensic Science, Ministry of Justice, Shanghai, China.
出版信息
Acta Bioeng Biomech. 2021;23(2):33-40.
PURPOSE
The purpose of the current study was to develop and validate a finite element (FE) pedestrian model with high computational efficiency and stability using a novel modeling approach.
METHODS
Firstly, a novel modeling approach of using hollow structures (HS) to simulate the mechanical properties of soft tissues under impact loading was proposed and evaluated. Then, an FE pedestrian model was developed, employing this modeling approach based on the Total Human Model for Safety (THUMS) pedestrian model, named as THUMS-HS model. Finally, the biofidelity of the THUMS-HS model was validated against cadaver test data at both segment and full-body level.
RESULTS
The results show that the proposed hollow structures can simulate the mechanical properties of soft tissues and the predictions of the THUMS-HS model show good agreement with the cadaver test data under impact loading. Simulations also prove that the THUMS-HS model has high computational efficiency and stability.
CONCLUSIONS
The proposed modeling approach of using hollow structures to simulate the mechanical properties of soft tissues is plausible and the THUMS-HS model could be used as a valid, efficient and robust numerical tool for analysis of pedestrian safety in vehicle collisions.
目的
本研究旨在开发和验证一种具有高计算效率和稳定性的有限元（FE）行人模型，采用一种新颖的建模方法。
方法
首先，提出了一种使用空心结构（HS）模拟冲击载荷下软组织力学性能的新颖建模方法，并对其进行了评估。然后，基于 Total Human Model for Safety（THUMS）行人模型，采用这种建模方法开发了一个 FE 行人模型，命名为 THUMS-HS 模型。最后，将 THUMS-HS 模型的生物逼真度与分段和全身体级的尸体测试数据进行了验证。
结果
结果表明，所提出的空心结构可以模拟软组织的力学性能，THUMS-HS 模型在冲击载荷下的预测与尸体测试数据吻合较好。模拟还证明了 THUMS-HS 模型具有较高的计算效率和稳定性。
结论
使用空心结构模拟软组织力学性能的建模方法是合理的，THUMS-HS 模型可以作为分析车辆碰撞中行人安全的有效、高效和稳健的数值工具。
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