基于整车模型的车身开口对角变形动态仿真研究

文章利用虚拟试验:(Virtual Proving Ground,简称VPG)提取的路谱载荷,基于整车模型系统研究了车型1(轿车),车型2(跨界SUV),车型3(中大型SUV)三种典型车型在动载荷激励下车身开口对角相对变形情况,并将动态法计算结果与静态工况分析结果进行了对比。研究结果表明:车型1在比利时路面和共振路面工况下车身开口对角变形量相对较大;基于虚拟路面动载荷激励法与车辆实际服役工况更接近,计算的开口对角变形量远大于静态工况的计算结果;模态贡献量分析显示对车型1,2,3后背门处车身开口对角变形影响最大的模态频率分别是14.49Hz,20.48Hz,21.51Hz,模态贡献量分析结果可为进一步结构优化和性能提升提供参考依据。

Study of Body Openings Diagonal Distortion Dynamic Simulation Based on Trimmed Body Model

In this paper,Virtual Proving Ground Technology was utilized to obtain roads load.Based on trimmed body model,body openings diagonal distortion of three typical vehicles–a Car,a Crossover SUV and a large SUV was simulated with dynamic road excitation.The body openings diagonal result calculated from dynamic method was also compared with the static load case.The research result indicated that:Body openings diagonal distortion was relatively large of Vehicle 1 under Belgian Pave Road and Resonance Road.Dynamic excitation simulation based on virtual roads load was much closer to actual auto driving conditions compared with static load case,the body openings diagonal distortion calculated from dynamic method was far greater than static load method.Modal contribution analysis result shown that the most influential modal frequency to tailgate diagonal distortion of Vehicle 1,Vehicle 2,Vehicle 3 respectively was 14.49 Hz,20.48 Hz,21.51 Hz.Modal contribution analysis result can also provide reference for further structure optimization and performance improvement.