Lightweight Optimization Design Of The Rear Bumper Of Aluminum Alloy Based On Collision Safety

In recent years,a lot of road traffic accidents are closely related to the passive safety of automobiles.Improving the passive safety of automobiles is of great significance to the improvement of road traffic safety and the sustainable development of the automobile industry.The rear bumper have a important protective effect in the road traffic safety accident,and the total energy absorbed by the rear bumper system in the road traffic accident affects the safety factor of the car.In the study of the characteristics of energy-absorbing and intrusion of the car bumper,we should try to minimize the quality of the bumper structure when considering increasing the safety factor of vehicle collision.In order to reduce the cost and shorten the design cycle,the finite element simulation analysis and the optimization design method have been widely used in the research and development design of auto parts.CAE technology can be applied to various design steps of auto parts,such as the initial design phase,detailed design and verification stage of parts.A lot of research shows that the finite element technology has high accuracy and reliability in the analysis of automobile collision simulation,component optimization design,modal analysis and strength stiffness.The topic is to optimize the rear bumper of an M1 car.The model is verified and be analyzed of collision characteristics at first;then a new type of car bumper collision beam assembly is designed with finite element simulation analysis,topology optimization,size optimization and experimental optimization design method,so as to reduce the total quality of the car;in the end,a comparative analysis is made of the new rear bumper collision performance,and Set up a complete set of optimization design method of rear bumper.The result shows that the energy that is absorbed of the new aluminum alloy bumper after optimization is improved;the quality is reduced by 34.8%;the amount of intrusion is reduced;the rigid wall surface's force of the collision has increased.Comparative analysis shows that the performances of the new bumper have been improved,the rigidity is increased,and the design results are consistent with the design requirements.