某SUV尾门模态性能分析及轻量化设计

Modal Performance Analysis and Lightweight Design of a SUV Tail Gate

以某SUV尾门为研究对象,首先建立尾门有限元模型,对其进行自由模态分析,分析结果表明其前三阶频率均大于激励频率,符合动态性能要求。然后采用锤击法对其进行模态试验,试验结果表明其仿真结果与试验结果基本一致。最后对尾门的结构参数进行优化设计,得到其最优的厚度值,并且其重量减小了5.5%,实现了轻量化的效果。

The tail gate of an SUV was taked as the research object.Firstly,the tail gate finite element model was established,and it was modal analyzed,the analysised result showed that its first three frequencies were greater than the excitation frequency,so it could meet dynamic performance requirements.Secondly,it was modal tested by adopting hammer method,the test result showed that its simulation results were basically consistented with the experimental result.Lastly,the structure parameters of the tail gate were optimized,so the optimal thickness were obtained,and its weight was reduced by 5%,the lightweight effect was realized.