基于分数阶KeLvin-Vigot模型橡胶衬套对汽车平顺性分析  

Analysis of automobile ride comfort with rubber bushing based on fractional kelvin-vigot model

作　　者：杨小龙 张艳龙[1] YANG Xiaolong;ZHANG Yanlong(School of Mechatronic Engineering,Lanzhou Jiaotong University,Lanzhou 730070,Gansu,China)

机构地区：[1]兰州交通大学机电工程学院,甘肃兰州730070

出　　处：《农业装备与车辆工程》2025年第3期54-58,共5页Agricultural Equipment & Vehicle Engineering

基　　金：甘肃省科技计划资助项目(21YF5WA060)。

摘　　要：为了准确描述汽车振动时的动态响应,引入分数阶Kelvin-Vigot(FKV)模型橡胶衬套,构建了十自由度汽车振动模型,并考虑将人体作为多自由度引入模型当中。通过数值仿真对比分析了考虑和未考虑FKV模型橡胶衬套时汽车振动时域响应量和频域响应量,同时对人体各部位进行加权,通过计算总加权加速度均方根值来评估汽车的平顺性。研究结果表明,采用分数阶Kelvin-Vigot模型的橡胶衬套后,车身的垂向加速度和俯仰角加速度峰值都有显著降低,分别减小约30%和18%,对应功率谱密度(PSD)和人体加权加速度均方根值也有所下降,进一步证实橡胶衬套在提升汽车平顺性方面发挥了积极作用。To accurately describe the dynamic response of a vehicle during vibration,the fractional-order Kelvin-Vigot(FKV) model rubber bushing was introduced,and a ten-degree-of-freedom vehicle vibration model was constructed,with the human body considered as a multi-degree-of-freedom system incorporated into the model.Numerical simulations were conducted to compare the time-domain and frequency-domain response quantities of the vehicle vibration with and without the FKV model rubber bushing.Additionally,the human body′s various parts were weighted,and the total weighted root mean square acceleration was calculated to assess the vehicle′s ride comfort.The results indicate that after employing the rubber bushing with the fractional-order Kelvin-Vigot model,the peak values of the vehicle′s vertical acceleration and pitch angle acceleration were significantly reduced by 30% and 18%,respectively.The corresponding power spectral density(PSD) and the human body weighted RMS acceleration also decreased,further confirming the positive role of the rubber bushing in enhancing the vehicle′s ride comfort.

关 键 词：悬架系统 橡胶衬套 分数阶Kelvin-Voigt模型 平顺性 

分 类 号：U461.4[机械工程—车辆工程]