Research on the Crashworthiness Optimization Method of the Floor Rails of a Passenger Car
The impact resistance of the front end of the floor longitudinal beam of the car body and the floor longitudinal beam di-rectly affects the amount of intrusion during the frontal collision of the car.The movement and deformation forms of this part are complex in a car collision,and there are many structural design variables.It is a difficult part of the car body crashworthiness de-sign.The goal of reducing the intrusion of the cab is to establish a simplified mechanism for the collision deformation of the front end of the floor stringer and the floor longitudinal beam.The target is converted into the maximum bending moment of the part.Using the theoretical formula of the maximum bending moment of the hat-shaped thin-walled beam,considering the structural quality factors,the structural size,thickness and material are selected.In the 65km/h frontal full-width rigid collision condi-tion,the optimized structure obtained by this method can reduce the peak acceleration by 72.4m/s2,and the amount of intrusion at the left foot of the driver's side and knuckle side is reduced by 21.1mm and 25.8mm,respectively.Achieved the goal of control-ling the maximum intrusion within 150mm.
Car Frontal CollisionLongitudinal BeamLimit AnalysisHat-Shaped Thin-Wall BeamMaximum Bending Moment
NETL
NSTL
万方数据
维普
