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Reconstruction of Automobile/Pedestrian Accidents Using CATAPULT
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English
Abstract
The Combined Airborne Tumbling Analysis Procedure Using Laws of motion to determine Throw speed (CATAPULT) for a pedestrian is compared to the published results of vehicle/pedestrian impact testing. Testing by the authors demonstrating the mechanics and dynamics of an object tumbling to rest following a known trajectory is presented. It is shown, that although during ground tumbling individual impulses of a pedestrian with the ground are what slow the pedestrian, with restitution occurring between these impulses, the use of an average drag factor of 0.5 over the total distance tumbled produces accurate results for initial speed.
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Citation
Aronberg, R. and Snider, A., "Reconstruction of Automobile/Pedestrian Accidents Using CATAPULT," SAE Technical Paper 940924, 1994, https://doi.org/10.4271/940924.Also In
References
- Aronberg, R. “Airborne Trajectory Analysis Derivation for use in Accident Reconstruction.” SAE Paper 900367 Society of Automotive Engineers Warrendale, PA 1990
- Wood, D.P. “Application of a Pedestrian Impact Model to the Determination of Impact Speed” SAE Paper 910814 Society of Automotive Engineers Warrendale, PA 1991
- Searle, J.A. “The Physics of Throw Distance in Accident Reconstruction” SAE Paper 930659 Society of Automotive Engineers Warrendale, PA 1993
- Appel, H. Sturtz, G. Gotzen, L. “Influence of Impact Speed and Vehicle Parameters on Injuries of Children and Adults in Pedestrian Accidents” Proceedings 2nd International IRCOBI Conference 1976 83 100
- Bratten, T.A. “Development of a Tumble Number for Use in Accident Reconstruction” SAE Paper 890859 Society of Automotive Engineers Warrendale, PA 1989