水性阻尼涂料在某驾驶室噪声控制中的应用  

Application of Liquid Applied Sound Damping in Noise Control of a Cab

作　　者：樊晓冬 董芸霞 尉潇健 员江涛 FAN Xiaodong;DONG Yunxia;WEI Xiaojian;YUN Jiangtao(Shaanxi Automobile Group Company Limited,Xi'an 710200,China;Technical Center,Dayun Automobile Company Limited,Yuncheng 044000,China)

机构地区：[1]陕西汽车控股集团有限公司,陕西西安710200 [2]大运汽车股份有限公司技术中心,山西运城044000

出　　处：《汽车实用技术》2025年第7期92-96,共5页Automobile Applied Technology

摘　　要：为实现某驾驶室耳旁声压级目标,在其驾驶室内部应用水性阻尼涂料(LASD)以实现噪声控制。通过模态分析,利用模态综合应变能法识别出初版喷涂区域,对驾驶室(未喷涂方案)进行了噪声传递函数(NTF)和面板贡献量分析,识别出对噪声响应较高的钣金,并形成优化后喷涂方案。对比未喷涂方案、喷涂区域优化前、优化后三种方案,发现优化后方案在X向激励-25 Hz的声压级较未喷涂方案降低了2.7 dB,Y向激励-66 Hz的声压级降低了2 dB,Z向激励-23 Hz的声压级降低了1.2 dB,优化前后声压级差异较小。说明LASD的应用可显著降低驾驶室噪声。In order to achieve the goal of sound pressure level beside the ear of a cab,a liquid applied sound damping(LASD)is applied to the interior of its cab for noise control.Through modal analysis,the preliminary coated area is identified using the modal integrated strain energy method.Noise transfer function(NTF)and panel contribution analysis is performed on the cab(uncoated project)to identify the sheet metal with higher response to noise and form the optimized coating project.Comparing the three project of the uncoated project,the coated area before and after optimization,it is found that the sound pressure level of the optimized project is reduced by 2.7 dB in the X direction excitation-25 Hz,the sound pressure level is reduced by 2 dB in the Y direction excitation-66 Hz,the sound pressure level of the optimized project is reduced by 1.2 dB in the Z direction excitation-23 Hz compared with the uncoated project,and the difference in the sound pressure level before and after optimization is relatively small.It shows that the application of LASD can significantly reduce noise of the cab.

关 键 词：LASD 驾驶室 模态分析 面板贡献量 NTF 

分 类 号：TB53[理学—物理]