Topological Analysis and a Parametric Optimization Method for Aluminum Alloy Frame Body of Electric Vehicle

Abstract:

An integrated multi-objective optimization method is proposed based on topology optimization and the implicit parameterized model to solve the problem that multiple types of section and plate variables should be considered when optimizing the aluminum alloy frame body of an electric vehicle. In order to obtain the frame body structure with a reasonable material distribution and load transfer as a reference for subsequent multi-objective optimization， the topology optimization design of the original body is conducted in the conceptual design stage. Then， the implicit parametric model of the vehicle body is built based on the topology optimization results and a response surface approximation model is established by using the parametric model to realize the automatic process of multi-objective optimization of aluminum alloy frame body. The results show that the all-aluminum frame body reduces weight by 11.9% while maintaining various performances within the target range. Therefore， the integrated multi-objective optimization method proposed based on topology optimization and the implicit parametric model can effectively improve the efficiency and accuracy of lightweight optimization of aluminum alloy frame body.

Key words:aluminum alloy frame body of electric vehicles;topology optimization;implicit parametric model;integrated multi objective optimization method