轮心激励下车辆结构路噪传递路径分析  

Vehicle structural road noise transmission path under wheel excitation

作　　者：卢炽华[1] 李永超 刘志恩 李秋悦 罗挺[3] 徐艳平[3] LU Chihua;LI Yongchao;LIU Zhien;LI Qiuyue;LUO Ting;XU Yanping(Hubei Key Laboratory of Advanced Technology for Automotive Components,Wuhan University of Technology,Wuhan 430070,China;Hubei Collaborative Innovation Center for Automotive Components Technology,Wuhan 430070,China;Dongfeng Motor Corporation Technical Center,Wuhan 430070,China)

机构地区：[1]武汉理工大学现代汽车零部件技术湖北省重点实验室,武汉430070 [2]汽车零部件技术湖北省协同创新中心,武汉430070 [3]东风汽车公司技术中心,武汉430070

出　　处：《振动与冲击》2021年第18期42-46,79,共6页Journal of Vibration and Shock

基　　金：国家自然科研基金项目(11002162)。

摘　　要：基于结构噪声传递路径分析的基本原理,建立在轮心加速度激励下整车NVH性能仿真分析CAE模型,探讨匹配传递函数的车内噪声峰值优化方法。以某SUV车型为研究对象,在襄阳试车场对整车60 km/h时速下的车内噪声和轮心加速度等参数进行测量,作为整车结构路噪分析模型的边界条件,获得了驾驶员右耳处车内噪声仿真值,其与试验数据基本吻合,在56 Hz和112 Hz存在明显噪声峰值。通过传递路径分析确定了112 Hz噪声峰值贡献量最大的路径,并对该路径悬架侧进行了振-振传递函数(VTF)分析,结合车身侧声-振传递函数(NTF)对其进行匹配优化,使112 Hz频率下噪声峰值降低8.45 dB(A)。Based on the basic principle of structural noise transmission path analysis,the CAE model of a vehicle for NVH performance simulation under the excitation of wheel center acceleration was established,and the method for optimizing the vehicle interior peak noise by matching the transfer function was discussed.Taking a certain SUV type of vehicle as a research object,the interior noise and wheel center acceleration of the vehicle at 60 km/h speed were measured at the Xiangyang test site.The wheel center acceleration was used as the boundary condition in the vehicle structural road noise analysis,and the noise near driver right ear was obtained by simulation.The simulation value of the vehicle interior noise is basically consistent with the experimental data,and there are obvious noise peaks at 56 Hz and 112 Hz.The largest contribution path of the peak noise at 112 Hz was determined by the transmission path analysis,and the vibration-vibration transfer function(VTF)of the suspension side in the path was analyzed.Then it was adjusted and optimized to match the noise-vibration transfer function(NTF)of the body-side.The result shows the peak noise at 112 Hz is reduced by 8.45 dB(A).

关 键 词：路噪 传递路径分析 噪声峰值 轮心加速度 

分 类 号：TH212[机械工程—机械制造及自动化] TH213.3