拖拉机驾驶室内异常噪声分析与控制.pdfVIP

第37 卷 第2 期 噪 声 与 振 动 控 制 Vol 37 No.2 2017 年4 月 NOISE AND VIBRATION CONTROL Apr. 2017 文章编号：1006-1355(2017)02-0075-05 拖拉机驾驶室内异常噪声分析与控制 张敬涛，周以齐 （山东大学 高效洁净机械制造教育部重点实验室，济南 250061 ) 摘 要：针对出口欧洲的国产某型号拖拉机驾驶室内存在的异常噪声问题，提出利用频谱分析对异常噪声特性进 行辨识，并利用壁板贡献度分析对引起异常噪声的主要机构进行排序，通过理论分析结合测试试验，为拖拉机驾驶室 降噪措施的制定提供了有效的参考意见。经工程实践验证，所提方法可以有效消除驾驶室内异常噪声，同时降低驾驶 员耳旁噪声2 dB(A) ，具有一定工程应用价值。 关键词：声学；频谱分析；壁板贡献度；异常噪声；耳旁噪声；有限元 中图分类号：TB53 文献标识码：A DOI 编码：10.3969/j.issn. 1006-1355.2017.02.016 Analysis and Control of Abnormal Noise in Tractor ’s Cabs ZHANG Jing-tao , ZHOU Yi-qi ( Key Laboratory of High-efficiency and Clean Mechanical Manufacture of Ministry of Education, Shandong University, Jinan 250061, China ) Abstract : The abnormal noise in domestic tractor’s cabs is studied. The method of using spectral analysis to identify the characteristics of the abnormal noise is proposed. The main mechanisms which induce the abnormal noise are arranged in order according to the panel contribution analysis. Through simulation and experimental validation, the effectiveness of the proposed method is demonstrated. As a consequence, the abnormal noise is reduced, and the noise at driver ’s ears is reduced to 2dB (A). This work can offer an effective guidance for eliminating the abnormal noise in tractor ’s cabs. Key words : acoustics; spectral analysis; panel contribution analysis; abnormal noise; noise at driver ’s ears; finite element method 近年来，随着科技发展以及环保要求的提高， 驶员耳旁噪声有较大贡献的板件，进而对相应的板 NVH （Noise 、Vibration 、Harshness ）性能日益受到重 件进行阻尼处理，是驾驶室减振