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| Reliability analysis of human-ground friction coefficient for vehicle-pedestrian traffic accident |
| ZHANG Xiaoyun1 YANG Xiaobo1 ZHANG Dongming1 HOU Xinyi2 |
1.School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240,China;
2.The Traffic Police Brigade of Shanghai Municipal Public Security Bureau, Shanghai, 200070,China |
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Abstract Traditionally, friction coefficient between human and ground, combining with various other parameters is considered as a constant to predict the pre-impact velocity of a car.It is impossible to accurately determine all these parameters used for simulation since there are uncertain factors at the accident scene.A method of constructing the relationship between calculation result and human-ground friction coefficient was proposed in this paper.By using the site measurement data and numerical simulation, we built a reliability analysis model related to the human-ground friction coefficient.Quantitatively analysis on the effect of reconstruction result and human-ground friction coefficient was conducted based on the above model.A 0.95 confidence interval of pre-impact velocity of car was also presented at last.Our analysis indicates that the friction coefficient between human and ground is of great significance for the estimation of the pre-impact velocity.That also reminds us reducing the error of friction coefficient measurement can help with obtaining a much more reliable result in vehicle-pedestrian contact collision accident reconstruction.
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Received: 30 November 2017
Published: 15 June 2019
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