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翻车事故中窗帘式安全气囊对乘员运动学和损伤指标的影响

The Effects of Curtain Airbag on Occupant Kinematics and Injury Index in Rollover Crash.

作者信息

Li Hongyun, Jiang Chengyue, Cui Dong, Lu Shuang

机构信息

China Automotive Technology and Research Center, Tianjin 300300, China.

Key Laboratory of Advanced Manufacture Technology for Automobile Parts, Ministry of Education, Chongqing University of Technology, Chongqing 400054, China.

出版信息

Appl Bionics Biomech. 2018 Mar 22;2018:4980413. doi: 10.1155/2018/4980413. eCollection 2018.

DOI:10.1155/2018/4980413
PMID:29765463
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5885342/
Abstract

BACKGROUND

Occupant injuries in rollover crashes are associated with vehicle structural performance, as well as the restraint system design. For a better understanding of the occupant kinematics and injury index in certain rollover crash, it is essential to carry out dynamic vehicle rollover simulation with dummy included.

OBJECTIVE

This study focused on effects of curtain airbag (CAB) parameters on occupant kinematics and injury indexes in a rollover crash. Besides, optimized parameters of the CAB were proposed for the purpose of decreasing the occupant injuries in such rollover scenario.

METHOD AND MATERIAL

The vehicle motion from the physical test was introduced as the input for the numerical simulation, and the 50% Hybrid III dummy model from the MADYMO database was imported into a simulation model. The restraint system, including a validated CAB module, was introduced for occupant kinematics simulation and injury evaluation. TTF setting, maximum inflator pressure, and protection area of the CAB were analysed.

RESULTS

After introducing the curtain airbag, the maximum head acceleration was reduced from 91.60 g to 49.52 g, and the neck M and neck F were reduced significantly. Among these CAB parameters, the TTF setting had the largest effect on the head acceleration which could reduce 8.6 g furthermore after optimization. The neck F was decreased from 3766.48 N to 2571.77 N after optimization of CAB protection area.

CONCLUSIONS

Avoiding hard contact is critical for the occupant protection in the rollover crashes. The simulation results indicated that occupant kinematics and certain injury indexes were improved with the help of CAB in such rollover scenario. Appropriate TTF setting and inflator selection could benefit occupant kinematics and injury indexes. Besides, it was advised to optimize the curtain airbag thickness around the head contact area to improve head and neck injury indexes.

摘要

背景

翻车事故中的乘员伤害与车辆结构性能以及约束系统设计有关。为了更好地理解特定翻车事故中的乘员运动学和伤害指数，进行包含假人的动态车辆翻车模拟至关重要。

目的

本研究聚焦于翻车事故中帘式安全气囊（CAB）参数对乘员运动学和伤害指数的影响。此外，为减少此类翻车场景中的乘员伤害，提出了CAB的优化参数。

方法与材料

将物理测试中的车辆运动作为数值模拟的输入，并将来自MADYMO数据库的50%混合III型假人模型导入模拟模型。引入包括经过验证的CAB模块在内的约束系统，用于乘员运动学模拟和伤害评估。分析了CAB的触发时间（TTF）设置、最大充气压力和保护区域。

结果

引入帘式安全气囊后，最大头部加速度从91.60g降至49.52g，颈部M和颈部F显著降低。在这些CAB参数中，TTF设置对头部加速度影响最大，优化后可进一步降低8.6g。优化CAB保护区域后，颈部F从3766.48N降至2571.77N。

结论

在翻车事故中避免硬接触对乘员保护至关重要。模拟结果表明，在这种翻车场景中，CAB有助于改善乘员运动学和某些伤害指数。适当的TTF设置和充气机选择有利于乘员运动学和伤害指数。此外，建议优化头部接触区域周围的帘式安全气囊厚度，以改善头部和颈部伤害指数。

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