Simulation of car impact to pedestrian lower extremity: influence of different car-front shapes and dummy parameters on test results

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Ishikawa, Hirotoshi¹; Kajzer, Janusz²; Ono, Koshiro¹; Sakurai, Minoru¹

Simulation of car impact to pedestrian lower extremity: influence of different car-front shapes and dummy parameters on test results

Proceedings of the 1992 International IRCOBI Conference on the Biomechanics of Impact

Affiliations

¹Japan Automobile Research Institute, Inc., Kamira, Tsukuba, Ibaraki 305, Japan

²Dept. of Injury Prevention, Chalmers University of Technology, 412 96 Göteborg, Sweden
Abstract
Sled impact tests on mechanical substitutes of a pedestrian were conducted as a preliminary study for the purpose of developing a subsystem’ test procedure for the assessment of car-front aggressiveness to pedestrian legs. Four mechanical substitutes of a pedestrian were used in the tests: the leg of a Rotationally Symmetrical Pedestrian Dummy (RSPD) as the representation of a subsystem, a HYBRID-II pedestrian dummy, a modified HYBRID-II pedestrian dummy equipped with a steel bar serving as knee joint, and a RSPD - HYBRID-IIP combined dummy in which the lower part of the RSPD and the upper part of the HYBRID-HP were connected by a joint in such a way that the movements of the upper part were similar to those in cadaver tests. In the tests the following were evaluated:
- The influence of vehicle shape on knee response and on vehicle impact forces;
- The influence of the upper body mass on knee response and on vehicle impact forces;
- The influence of bumper system on knee response, kinematics of pedestrian mechanical substitute and on vehicle impact forces;
- The influence of pedestrian mechanical substitute characteristics on its kinematics, knee response and on vehicle impact forces.
This paper describes a primary concept when subsystem test methods for the assessment of carfront aggressiveness to pedestrian legs in a car-pedestrian collision are considered.

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