Analysis of the Rollover Crash Worthiness of the Bus Body Structure Based on ECE R66 Regulation

Given that dynamic test data are difficult to obtain and relevant test results are always unstable, this study examines the rollover crash worthiness of a 6756-type bus. The finite element model and numerical simulation environment for the rollover crash are established in the LS-DYNA software according to the ECE R66 regulation to analyze the dynamic numerical simulation results of the rollover crash of the passenger vehicle. This study discusses and analyzes the energy dissipation of the system, the energy-absorbing effects of the main structure, and the deformation of the system in the rollover crash process. The effectiveness of the method that evaluates the rollover crash of the passenger vehicle with finite element is verified by comparing the simulation results and the real vehicle testing data. Results show that the amounts of absorbed energy of the right side, top, and left side walls of the passenger vehicle account for 40%, 30%, and 15% of the total absorbed energy, respectively. The deformation of the column in the same window successively decreases from top to bottom, and the deformation of the column with the same height in different windows decreases from the front to the back.