Optimal design for frame structure of buses to satisfy rollover safety based on ECE R66 standard

Abstract

This paper describes the design for optimization of buses structure to satisfy
the rollover safety. Based on the finite element model, we analyzed the bus
rollover safety according to ECE R66 standard, and designed the optimization
for bus frame structure. Orthogonal design method was used to establish the
experimental simulation scheme for analysis of bus safety in rollover
scenarios with different thicknesses of steel tube. The SPSS software was
used to conduct regression analysis on simulation results and establishing
regression functions, the design variables were optimized by MATLAB
software. The results showed that, after optimizing the frame structures in
accordance with ECE R66, the total weight of optimized bus structures was
decreased by 10.9%, thus accomplished the lightweight design of bus body.