关键词: 薄壁梁；碰撞吸能空间；结构参数；预测模型

Abstract: Based on the mechanics theory of thin-walled beam, combined with the calculation and analysis formula of axial crushing force of thin-walled beam, combined with the physical and mathematical logic of collision analysis, this paper summarizes the input and output variables and calculation logic of the parameter prediction model of energy absorbing structure of car body, and constructs a fast and automatic optimization parameter prediction model with access database tool, which can be realized in the future In the early conceptual design stage, the car body quickly responds to the layout and modeling requirements, and carries out the feasibility check of the collision energy absorption space and the optimization design of the energy absorption structure parameters of the front end of the car body, which greatly improves the design efficiency and avoids the huge cost due to the collision safety risk in the later stage.

Key words: Thin walled beam; The collision energy absorption space; Body structure parameter; Prediction model