关键词: 纯电汽车；组合支架总成；CAE；轻量化

Abstract: Aiming at the differences in front engine room layout between pure electric and fuel vehicles, a front engine room combination bracket assembly suitable for pure electric vehicle front engine room layout scheme is designed, a mechanical model is established, and computer aided engineering (CAE) analysis is carried out to optimize the combination bracket assembly through material and structural improvements. The results show that under the same layout scheme, the performance of the steel composite bracket assembly is difficult to meet the performance requirements. After material and structural optimization, the aluminum composite bracket assembly can better meet the performance requirements. Compared to the steel composite bracket assembly, the aluminum composite bracket assembly can achieve a weight reduction of about 2.06 kg, with a weight reduction rate of 44.2%, and a significant lightweight effect. Excluding costs such as molds, tooling, and fixtures, the cost of parts is reduced by approximately 3.36 yuan per piece. It has mass production conditions and provides a good typical case for the lightweight design of composite bracket assemblies for pure electric vehicle models.

Key words: battery electric vehicle; combination bracket assembly; CAE; lightweight