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Pedestrian Hip Impact Simulator Development and Hood Edge Location Consideration on Injury Severity
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English
Abstract
This paper describes an upper leg impact simulator that is representative of the dynamics of impacts between the pedestrian hip or upper leg and the vehicle hood edge.
Cadaver tests have been analyzed to obtain the actual velocity of the upper leg as it strikes the hood edge. It is found that the impact velocity of the hip or upper leg onto the hood edge is approximately one third of the vehicle velocity for a conventional vehicle front.
The MADYMO computer program is used to study the effects of different hood edge locations, relative to the bumper, on the total body dynamics of the pedestrian. It is found that changes in the location of the hood edge cause significant changes in the head and torso impact with the hood of the vehicle.
Several techniques are discussed for examining the benefits of different hood edge locations on total body injury. One of these, an influence factor, combines injury information from actual accident data for the various parts of the body with the impact forces from the mathematical simulations. Based on this factor, there appears to be a hood edge location that may mitigate injuries to both children and adults.
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Citation
Pritz, H. and Pereira, J., "Pedestrian Hip Impact Simulator Development and Hood Edge Location Consideration on Injury Severity," SAE Technical Paper 831627, 1983, https://doi.org/10.4271/831627.Also In
References
- Eppinger R. Kulkarni Y. “Relationship Between Vehicle Front Structure and Injury to the Adult Pedestrian Hip Area.” Proceedings of the Eighth International Technical Conference on Experimental Safety Vehicles Wolfsburg 1981
- Pritz H.B. Weis E.B. Herridge J.T. “Body Vehicle Interaction: Experimental Study,” U.S. DOT Contract DOT-HS-361-3-745 Washington, D.C. March 1975
- van Wijk J. Wismans, J. J. Maltha J. Wittebrood L. “MADYMO Pedestrian Simulations,” SAE International Congress Detroit February 1983 830060
- Twigg David W. Tocher James L. “Pedestrian Model Parametric Studies - Final Report to NHTSA,” Contract No. DOT-HS-356-3-719 I November 1976
- Daniel S. The Role of the Vehicle front End in Pedestrian Impact Protection SAE International Congress Detroit 1982 820246