基于ATV技术的驾驶室低频噪声优化控制

Low frequency noise optimization and control of cab based on ATV approach

文章建立了某卡车驾驶室结构有限元模型，通过数值与试验模态的相关性分析验证了模型的精确性，并在此基础上建立耦合声学边界元模型；通过实车60 km／h匀速行驶工况下的道路试验，测得悬置点处的振动加速度信号和驾驶室内的声压响应；基于声传递向量（acoustic transfer vector ，ATV）技术，将所测激励信号施加于耦合边界元模型进行低频段（20～220 Hz ）驾驶室内频率响应分析；最后应用板件贡献量分析和模态参与因子分析找出对驾驶室内主要噪声峰值贡献显著的板件并进行结构优化。仿真和试验结果表明，驾驶室内低频噪声得到明显改善，基于ATV技术的优化分析方法可以有效控制驾驶室内的低频噪声。

The structural finite element model of a truck cab was established ,and its accuracy was veri‐fied by the correlation analysis of the mathematical and experimental model .On this basis ,a coupled acoustic boundary element model was built .The acceleration signals at cab mounting and the response signals of interior noise were measured by road test under the driving condition of 60 km/h .Based on the acoustic transfer vector（ATV） approach ,the excitation signals were applied to the coupled bound‐ary element model to make the response analysis in the low frequency range from 20 Hz to 220 Hz .Fi‐nally ,the panel contribution and the modal participation factor analyses were implemented to identify the panels that have the largest contribution to the peak noise and then the structural optimization was made .The simulation and testing results show a significant improvement of interior noise ,thus verif‐ying that the ATV approach can control the low frequency noise of cab effectively .