Prediction Method on Vehicle Acceleration in Frontal Offset Impact Sled Test

Abstract

Vehicle impact acceleration has been widely used to reproduce the impact process in crash CAE analysis and the sled test. In the sled test for frontal rigid barrier impact, B-pillar lower accelerations were used as input pulses. But for the frontal offset impact, the magnitudes and directions of left and right B-pillar lower accelerations are significantly different, which makes the selection of vehicle acceleration complicated. By simplifying the vehicle impact kinetic model, a new prediction algorithm for calculation the acceleration of any point on vehicle body was deduced. The new method was verified with the full scale impact data and the test results show that both the trends of the acceleration curves and the peaks of the calculated values have a strong consistency with the measured values.