摘要
建立了某SUV前副车架其有限元模型。在6种工况下分别对前副车架进行了强度分析,以及自由工况下的模态分析。对所有零部件进行了灵敏度分析,据此确定优化设计变量。在此基础上进行了轻量化设计。优化之后的前副车架的总质量较之前减重比达到19%。对优化后的模型进行了强度分析和模态分析。验证结果表明,应力值均在屈服应力范围内,模态固有频率得到相应的提高。在提高其性能的基础上,实现了质量减轻的目标。
The finite element model of a SUV front subframe is established.The strength of the front subframe is analyzed under six kinds of operating conditions, and the modal analysis under free condition is carried out. Sensitivity analysis of all components is used to determine the optimal design variables. The total weight of the front subframe after optimization is 19% better than the pre-optimized weight loss ratio. Lightweight design is carried out based on sensitivity analysis. And the strength analysis and modal analysis of the optimized model are carried out. The results show that the stress values are within the range of yield stress, and the natural frequency of the modal is improved accordingly. The goal of improving its performance is achieved based on quality reduction.
出处
《机械工程师》
2017年第11期11-14,共4页
Mechanical Engineer
关键词
前副车架
强度
模态
灵敏度分析
轻量化
front subframe
strength analysis
modal analysis
sensitivity analysis
lightweight
