重力的标准化评估 定位人体模型用于虚拟测试
B Wade von Kleeck Iii1, Juliette Caffrey1, Ashley A Weaver1
1Biomedical Engineering, Wake Forest University School of Medicine.
Stapp car crash journal
|September 9, 2024
概括
优化计算人类模型 (HBM) 座位涉及不同姿势的特定重力定位时间. 躺着的乘客需要比起直立的司机更少的定位时间来准确评估安全系统.
科学领域:
- 生物力学 生物力学
- 计算建模计算建模
- 汽车安全工程 汽车安全工程
背景情况:
- 计算人类模型 (HBM) 越来越多地用于车辆安全系统评估.
- 将HBM与其座椅环境的有效合对于准确的模拟结果至关重要.
- 现有的HBM与座椅相互作用的方法需要对不同姿势进行进一步的研究.
研究的目的:
- 评估重力沉降方法对HBM座椅合质量的影响.
- 为了确定直立驾驶员和倾斜乘客姿势的最佳重力沉降时间.
- 在碰撞模拟过程中评估定位参数对HBM动力学的影响.
主要方法:
- 模拟THUMS v4.0.1 在NCAC车辆模型中的直立和卧卧姿势.
- 不同的HBM座椅接触摩擦和座椅刚度.
- 进行了带有和没有盆腔约束的重力沉降,将800毫秒的模拟与更短的,优化的时间进行比较.
- 进行了碰撞脉冲模拟,以分析定位时间对动力学的影响.
主要成果:
- 确定了最佳的重力沉降时间:直立驾驶员350毫秒,倾斜乘客290毫秒.
- 骨盆受约束的方法推用于直立的驾驶员姿势,而不是倾斜的.
- 优化的沉降时间实现了与800ms沉降相比较的质量指标.
- 司机动力学随着重力沉降时间的变化而显著变化.
结论:
- 姿势特定的重力沉降时间对于准确的HBM-座椅合至关重要.
- 减少沉降时间是可行的,并且对躺着的乘客来说是高效的.
- 需要进一步的研究来验证不同HBM和测试模式的发现.
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