| 基于风挡玻璃凹陷量的人车事故车速计算模型 | |
| 许骏 ; 李一兵 ; XU Jun ; LI Yibing | |
| 2010-06-04 ; 2010-06-04 | |
| 关键词 | 风挡玻璃 车速计算 冲击 事故再现 Windshield Velocity calculation Impact Accident reconstruction U491.31 |
| 其他题名 | Model of Vehicle Velocity Calculation in Vehicle-pedestrian Accident Based on Deflection of Windshield |
| 中文摘要 | 根据风挡玻璃在行人头部冲击后产生的凹陷量,提出一种基于矩形薄板冲击动力学理论的人车碰撞事故车速计算模型。建立行人头部与风挡玻璃碰撞的抽象物理模型,并根据人车碰撞的特定情形,将适当的材料参数分别赋予风挡玻璃和头部。在保证模型精度的前提下,将风挡玻璃视为矩形薄板,且约束形式简化为简支形式。根据Hertz弹性体接触理论和能量守恒定律,建立头部冲击力与矩形薄板挠度之间的关系。利用Navier定理将风挡玻璃的凹陷量进行改写并得到头部冲击速度与风挡玻璃挠度的模型。结合人体上风挡玻璃时汽车碰撞速度与头部冲击风挡玻璃速度之间的定量关系,建立风挡玻璃凹陷量与汽车碰撞速度之间的计算模型。经实际交通事故案例验证,该模型计算快速,结果可靠,为人车碰撞交通事故再现中的车速计算提供一种新的计算方法。; A vehicle velocity calculation model of vehicle-pedestrian accident is established based on the impact dynamics of rectangular thin plate, according to the deflection of the windshield plate. Proper material parameters are given to windshield and pedestrian head respectively according to the specific situation of vehicle-pedestrian accident. Support type of windshield on the frame is considered as simplified support without affecting the accuracy of the model. During modeling, expression of impact force between head and windshield is suggested in the light of Hertz elastic contact theory and energy conservation law. In addition, the expression of windshield deflection is rewritten based on Navier theory and the relationship between impact velocity and windshield is abtained. Considering the quantitative relations between the impact velocity and vehicle velocity, a calculation model is finally put forward. Comparison with cases of actual vehicle-pedestrian accidents proves the accuracy and reliability of the model. Therefore, this model provides the accident investigators and researchers with a new method to reconstruct the vehicle velocity.; 公安部重点攻关计划资助项目(20052DGGBJSJ002) |
| 语种 | 中文 ; 中文 |
| 内容类型 | 期刊论文 |
| 源URL | [http://hdl.handle.net/123456789/36651]  |
| 专题 | 清华大学 |
| 推荐引用方式 GB/T 7714 | 许骏,李一兵,XU Jun,等. 基于风挡玻璃凹陷量的人车事故车速计算模型[J],2010, 2010. |
| APA | 许骏,李一兵,XU Jun,&LI Yibing.(2010).基于风挡玻璃凹陷量的人车事故车速计算模型.. |
| MLA | 许骏,et al."基于风挡玻璃凹陷量的人车事故车速计算模型".(2010). |
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