Automotive Side Impact Beam Simulation Design Optimization Research Using A Simplified Model

With the rapid development of automobile industry, automotive passive safety, environmental protection and energy saving has been more and more concerned in society. According to statistics by authority department, side collision is one of the highest traffic problems in all kinds of traffic accidents. Therefore, how to reduce the passenger injury against side collision accident and how to improve vehicle crash performance against the side has become a hot issue in current automotive industry. Meanwhile, the use of finite element simulation to analysis vehicle side collision safety performance and optimization has great practical significanceThe traditional Finite Element Analysis of automotive side collision safety commonly use complete vehicle model. Although in some condition it may lead to a good result, applying the whole model course low compute efficiency and is not suitable to large and detailed analysis. This paper establishes a finite element simulation model by using a certain domestic vehicle, which is following the nation legislations about the automotive side collision. Corresponding to the complete vehicle model, we build a simplified model for large and detailed analysis on the cross section of door crash beam which use the high strength steel plate. Then we get a better cross section of the collision beam, and base on which, the place of the door collision beam is optimized by using Response surface method. Main conclusions are as follows:(1) The change of the door impact beam has little effect on its safety during the side-column crash; meanwhile, in the Moving deformable barrier (MDB) crash process, compare with the U-collision, the M-collision beam with high strength steel is not only reduced 25% of the weight, but also has been improved in the safety performance.(2) On one hand, Reduce the width of the M-type door impact beam will increase the passive safety performance, but on the other hand, if the beam is too small, which will be broken when the crash happened. When the top width of the M-type door impact beam is closed to its middle slot depth (which is about 8:11 of the chosen type automotive vehicle), the side impact crash test will obtain a rather satisfactory performance result.(3) To restructure the car door, the anti-impact beam of front door should be placed slightly skewed and next to the bottom of the column B, also this could ensure the beam play a better role in a side impact crash. Therefore, the changing of the crash beam position could reduce invasive speed and distance of the car door inner panel...