The Bumper Collision Simulation And Optimization Design

The vehicle collision at low speeds, through its own deformation bumper collision energy is absorbed, can be automatically restored after the collision, in order to ensure that the other body parts and occupant safety; in high-speed collision, the collision bumper rapid dispersion of reasonable force to the whole body, in order to ensure occupant safety. Therefore, the study of the collision energy absorbing bumper features to explore improved design bumper system for automobile safety design is important.This thesis describes in detail the basic vehicle crash finite element theory, the contact algorithm, the time step equations and other features, to create a positive impact for the finite element model provides a theoretical basis. Based on a certain type of car bumper system characteristics, using software Pro/E established a bumper system pendulum impactor simulated three-dimensional solid model. With pre-processing software HYPERMESH meshed. And select the ANSYS software as a pendulum crash test simulation tools. Refer to our vehicle front and rear protective device evaluation standard GB17354-1998. using ANSYS simulation vehicle at different speeds and different angles on the pendulum impact process, and the use of ANSYS/LS-DYNA software, detailed post-processor LS-PREPOST analysis of the impact of the deformation of the bumper and the typical nodal displacement, velocity, energy absorption curves of other important parameters, simulation results show that the safety performance of the bumper is not ideal. Then repeat the test continuous improvement through design parameters, and ultimately find the optimal solution bumper design, analysis and evaluation of the bumper system crashworthiness. Through this study identified the impact bumper crashworthiness several major parameters, and optimize the design of the bumper provides a theoretical orientation, can serve as a reference for future optimization design bumper.Finally, the text summarizes the work done and materials optimization and structural optimization from other aspects of the prospect.