Simulation analysis of frontal collision for a passenger car
To accurately assess the safety performance of a vehicle during a frontal collision,a geometric model of the entire vehicle is established using CATIA software.The finite element model of the entire vehicle is built using HyperMesh software,and the frontal collision is simulated using LS-DYNA software.HyperMesh software is then used to analyze the reliability of the model as well as the deformation of the entire vehicle,B-pillar acceleration,and the deformation of various components during the collision.The simulation results indicate that during the collision,the ratio of added mass to total mass is 2.16%,and the ratio of hourglass energy to total energy is 1.02%,meeting the reliability requirements of the vehicle model.The maximum accelerations of the left and right B-pillars are 42.4g and 45.4g,respectively,satisfying the China New Car Assessment Program's requirement that the maximum acceleration of the B-pillars on both sides should not exceed 72g.The maximum deformation of the front bumper beam is 178.1 mm,the maximum deformation of the front energy absorber box is 315.9 mm,and the maximum deformation of the front longitudinal beam is 618.9 mm,which indicates that the front energy-absorbing components of the vehicle have good energy-absorbing effects.The maximum deformation of the front bulkhead is 137.8 mm,meeting the collision test limit of a maximum deformation of no more than 150 mm,which better protects the safety of the driver and passengers.
finite element modelfrontal collisionB-pillar acceleration