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Effects of pedestrian gait, vehicle-front geometry and impact velocity on kinematics of adult and child pedestrian head

Y. Peng ; C. Deck ; Jikuang Yang (Institutionen för tillämpad mekanik, Fordonssäkerhet) ; R. Willinger
International Journal of Crashworthiness (1358-8265). Vol. 17 (2012), 5, p. 553-561.
[Artikel, refereegranskad vetenskaplig]

The objective of the study is to investigate the effects of pedestrian gait, vehicle-front geometry and impact velocity on the dynamic responses of the head. The multi-body dynamic (MBD) models were used to simulate the head responses in vehicle to pedestrian collisions with different vehicle types in terms of head-impact point measured with Wrap Around Distance (WAD), head relative velocity and impact angle. Furthermore, the distribution of the head contact point on the vehicle fronts is analysed for a comparison of the contact point with the testing areas in the EEVC headform impactor test procedures. A simulation matrix is established using five vehicle types, two mathematical models of the pedestrians represented a 50th male adult and a 6-year-old child as well as seven pedestrian gaits based on typical postures in pedestrian accidents. In order to simulate a large range of impact conditions, four vehicle velocities (30 km/h, 40 km/h, 50 km/h and 60 km/h) are considered for each pedestrian position and vehicle type. The results indicated that the pedestrian gait and vehicle-impact velocity strongly influence head-impact condition. It is obvious that due to different vehicle-front geometry, the head-impact velocity, impact angle and head-impact point could be varied as well. This study provides suggestions for different head-impact conditions of subsystem test to the front part of different passenger vehicles.

Nyckelord: crash simulation, pedestrian gait, vehicle-front geometry, impact velocity, head-impact conditions, collisions, accidents, injuries



Denna post skapades 2012-11-14. Senast ändrad 2014-09-29.
CPL Pubid: 166006

 

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Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Fordonssäkerhet

Ämnesområden

Teknisk mekanik

Chalmers infrastruktur