In typical automobile-pedestrian collision accidents,the movement of pedestrians in the air can be divided into horizontal throw motion and oblique throw motion.To explore the applicable condi-tions of the human body throwing distance model in the calculation of accident speed in the current na-tional standard,the throwing distance models of horizontal throw and oblique throw were constructed based on the basic principles of projectile kinematics.The MATLAB numerical analysis method was a-dopted to obtain the theoretical throwing angle of the oblique throw motion when pedestrians perform hori-zontal throw and oblique throw motions with the same throwing distance.On this basis,the PC-Crash simulation experiments were conducted to establish a multi-rigid body model of pedestrians,and the simu-lated experimental values of the throwing angle and distance of pedestrians were obtained after collision with cars at different speeds.These simulated values were compared and analyzed with theoretical calcu-lation values.The study showed that the automobile-pedestrian throwing distance model in current nation-al standard was only approximately applicable in low-speed or high-speed ranges for identifying car speeds in automobile-pedestrian collision accidents.Therefore,caution should be exercised in the practical iden-tification of automobile-pedestrian collision accidents.
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