Front Bumper Optimization Design for Pedestrian Lower Leg Impact

摘要

In the process of styling design of the early stage vehicle development, the design of front bumper system is critical. It involves various aspects of performance requirements, including pedestrian leg protection, which is an important factor for evaluating the front bumper design. The CAE simulation model of lower leg impact for a platform vehicle is validated by correlating with the test results. LS-OPT is used for optimal design of the bumper system with this model. The thickness of bumper foam, the distance between front bumper and lower bumper or hood in X-direction, and the distance from front bumper to leg form in Z-direction are defined as design variables. The optimal result is obtained and verified. It results in the improvement of pedestrian lower leg injuries and serves as a good recommendation for the vehicle development.