基于磁流变缓冲器的汽车碰撞仿真研究

o improve the passive safety performance of conventional vehicles, the design of bumper with higher energy absorption efficiency had become an important topic for vehicle safety. To avoid the disadvantage of traditional bumpers with worse energy absorption and adaptive capacity to complex crash conditions, a vehicle magnetorheological (MR) collision absorber was proposed to replace the traditional bumper. The crash test was simulated by using the nonlinear finite element software LS-DYNA. The numerical results indicate that the proposed MR absorber can reduce the impact force and the maximum acceleration while comparing to the traditional bumper. The collision safety of vehicle is significantly improved.