关键词: 白车身；弯曲静刚度；扭曲静刚度；仿真方法

Abstract: The stiffness of car body in white affects the riding comfort and safety of drivers and passengers at the same time. Taking a passenger car body in white as the research object, this paper obtains the bending static stiffness and torsional static stiffness of the body in white by using the test method and computer numerical simulation method respectively. Through the comparative analysis of the results, it is found that the stiffness values of the body in white obtained by the two methods meet the design requirements, and the stiffness curves obtained by the two methods are very smooth, indicating that the overall stiffness design of the body in white is reasonable. The results verify the reliability of the two methods and provide data reference for the design of the body in white.

Key words: Body in white; Bending static stiffness; Torsional static stiffness; Simulation method