Research and Application of Integrated Durability Simulation Technology for Body in White

As the competition in the new energy passenger vehicle market continues to intensify, OEMs are accelerating the deployment and replacement of new energy vehicles. Therefore, higher requirements are being put forward for the research and development cycle of vehicle models, especially in the field of CAE virtual verification. The durability simulation analysis and verification cycle of white body is the longest, becoming one of the bottlenecks restricting the compression of project research and development cycles. This paper proposes an integrated technology route of virtual simulation replacing physical verification. By applying virtual proving ground (VPG) and virtual wheel coupling bench simulation technology, the durability simulation calculation of the body in white (BIW) with "zero sample vehicle and zero test"is achieved. Pseudo damage sensitivity analysis technology is used to simplify the analysis of working conditions and support the rapid verification and improvement of the body in white before prototype production in the design phase. The research and application results indicate that the integrated technology of virtual simulation for body in white can accurately identify the risk of solder joint failure in white body, significantly shorten the verification cycle by 70%, the accuracy of pseudo damage calibration meets 0.8-1.2, and has high engineering application value.