Abstract: To improve the mechanical performance and reduce the weight of a mini electrical vehicle frame, the reliability theory is introduced into the optimization design of the frame structure. Considering the impact loads under multiple working conditions, a new structure design is proposed by utilizing the topology optimization method to meet the layout and real driving demands. Based on the structure reliability theory and the finite element method, an optimization on the structure parameters is conducted. Both the theoretical analysis and the application result indicate that the new structural design is rational, thus proving the effectiveness and feasibility of the new design method, which provides a new idea for structure optimization design.

Key words: FEM, Reliability, Structure optimization, Topology optimization