Auto body collision with the buffer device crashworthiness Absorbing Energy Research

As modern transportation vehicles, in the convenience to people's lives, but also brings many risks, traffic accidents have become a major nuisance of human society.Research from the collision at home and abroad can see that the collision law based mainly on the front and side impact collisions, but for the road car and the collision protection system in the collision buffer device characteristics of small, focused study of this issue is hole with energy-absorbing bumper collision thin-walled beam structure used in this method is verified by simulation is reasonable and correct; then this method will be used in cars collision and collision properties in the buffer device. In this paper, a computer simulation to study the means of theoretical analysis, computer simulation method of combining, for highway maintenance vehicle maintenance area with a high-speed car crash-prone features, introduced the technology specification highway safety performance acceptance criteria and test methods proposed by the EU Standard EN131 road protection system. Maintenance operations for the Expressway, analyzes the cause of the accident, raised the need to install the collision buffer device, and select the appropriate vehicle collision. Systematically discusses the vehicle collision based on nonlinear finite element analysis, and impact analysis software ANSYS / LS-DYNA, for example, describes finite elements theory, structural shell element theory.Using ANSYS / LS-DYNA model of a car front crash energy absorption components of the simulation analysis, the study draws obtained by optimizing the energy absorption of thin-walled beams by applying it to the bumper of the collision analysis, the increase in absorbing bumper energy characteristics, improve the vehicle's passive safety, but also for the collision of the vehicle to provide reliable guidance. Proposed maintenance repairs on the highway when the front of the construction area to prevent traffic congestion and traffic accidents is apt to cause this phenomenon, in the closed lane, the high speed high speed cars usually run into maintenance vehicle rear-end collision occurred the need to conserve the car in the rear to install a collision buffer device.Through the car and the collision characteristics of the collision buffer device, access to the same collision conditions in the automotive collision and the collision buffer device to obtain a better course of collision characteristics, occupant protection which has important significance. 

Keywords: collision finite element method computer simulation of collision characteristics of collision buffer device