摘要
为解决小型电动汽车车内路面激励噪声在30Hz与36Hz附近声压级过大的问题,以某小型电动汽车为研 究对象,以实验获取的数据为基础,利用传递路径分析(TPA)模型验证实验结果的准确性,用底盘车身接附点的载荷激 励已建立的车身内饰与声腔模型,进行强迫响应分析,将仿真结果与实验结果对比,验证模型的有效性。通过计算该 模型在载荷激励下的工作变形,分析引起车内噪声的车身结构弱点,主要通过增加限位零件或固定零件来进行车身结 构的优化。实验工况下的结果表明:优化后车内噪声在30Hz与36Hz附近噪声分别降低了9.7dB与5.3dB,效果十分 理想,成功解决路面激励导致的NVH问题。
The problem of overlarge sound pressure level inside small electric vehicles under the road surface excitation near 30 Hz and 36 Hz frequencies is studied.The experiment of a small electric vehicle is done and the transfer path analysis(TPA)model is used to verify the accuracy of the experimental results.The load of the chassis body at the attachment point is used to excite the established body interior and acoustic cavity model for forced vibration response analysis.The simulation results are compared with the experimental results to verify the validity of this model.By calculating the working deformation of the model under the test load excitation,the structural weakness of the vehicle body which causes the internal noise of the vehicle is analyzed.And the body structure is optimized mainly by adding the restraint parts or the fixed parts.The experimental results show that after the optimization the interior noise of the car is reduced by 9.7 dB and 5.3 dB respectively at the frequency near 30 Hz and 36 Hz,and the effect is very satisfactory.The NVH problem caused by road excitation is successfully solved.
作者
王田修
路志尧
顾晓卓
汪海涛
WANG Tianxiu;LU Zhiyao;GU Xiaozhuo;WANG Haitao(SAIC-GM-Wuling Automobile Co.,Ltd.,Liuzhou 545000,Guangxi China;Siemens Industrial Software(Beijing)Co.,Ltd.,Beijing 100102,China)
出处
《噪声与振动控制》
CSCD
2019年第5期113-117,共5页
Noise and Vibration Control
