Influence of windscreen inclination angle on the head/brain injury in a pedestrian impact accident

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (6) : 189-197.

YU Chao1,2,LAN Diandian1,2,WANG Fang1,2,WANG Bingyu1,2,LI Guibing3,LI Fan4,PENG Yong5

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Abstract

The head/brain injury occurs frequently in a car-to-pedestrian impact accident.The impact between the pedestrian head and the windscreen is a leading cause of the head/brain injury.The effect of windscreen inclination angle of a typical small passenger car on the pedestrian head/brain injury was numerically investigated.The THUMS (Total HUman Model for Safety, developed by Toyota Central R & D Labs) head-neck finite element (FE) model and TNO multi-body (MB) pedestrian model were coupled to construct a new numerical pedestrian impact model.By simulating a real-world car-to-pedestrian impact accident, the new coupled model was validated in terms of the pedestrian/vehicle kinematics reconstruction of such accident.Based on the above model, the impact simulation matrix was set up, the variation range of the windscreen inclination angle was set to be 24°—50° (an increment of 2°), the impact locations of the pedestrian with the vehicle were defined as the 1/2 and 1/3 of the front of the bumper, and the impact velocity was considered to be 45 km/h.The results show that the coupled pedestrian model could predict the pedestrian kinematics effectively.The predicted head/brain injury when the pedestrian is impacted at the 1/2 of the bumper seems to be more severe than at the 1/3 location.It is also suggested that the head/brain injury risk decreases firstly and then increases with the increasing windscreen angle within the predefined range, and the angle between 32°—34° produces the lowest head/brain injury risk.

Key words

pedestrian impact accident;head/brain injury

/ windscreen inclination angle / multi-body(MB) / finite element(FE);coupling

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YU Chao1,2,LAN Diandian1,2,WANG Fang1,2,WANG Bingyu1,2,LI Guibing3,LI Fan4,PENG Yong5. Influence of windscreen inclination angle on the head/brain injury in a pedestrian impact accident[J]. Journal of Vibration and Shock, 2020, 39(6): 189-197

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