一种进气消声器设计及其在拖拉机中的应用-噪声与振动控制.PDF

第37 卷 第3 期 噪 声 与 振 动 控 制 Vol 37 No.3 2017 年6 月 NOISE AND VIBRATION CONTROL Jun. 2017 文章编号：1006-1355(2017)03-0189-04 一种进气消声器设计及其在拖拉机中的应用 谭延峥，李舜酩，程 春，张宗振 （南京航空航天大学 能源与动力学院，南京 210016 ） 摘 要：某型号拖拉机的发动机进气系统噪声过大，严重影响驾驶员身心健康，需对其进行降噪设计。首先，基于 试验测试，分析进气噪声特征。其次，基于直通穿孔管消声理论，将直通穿孔管结构看做一种共振消声单元，提出并设 计一种针对宽频带噪声的多腔共振型消声器结构。同时，采用声学有限元软件Virtual. Lab 对该消声器声学性能进行 仿真研究。最后，将该消声器加装在实车上进行试验验证。结果表明，数值模拟结果与试验结果能较好吻合，所设计 的消声器能明显降低发动机进气噪声，消声量达到15 dB(A) ，优于国标要求。 关键词：声学；进气消声器；拖拉机；宽频带；仿真分析；试验 + 中图分类号：TB535 .2 文献标识码：A DOI 编码：10.3969/j.issn. 1006-1355.2017.03.038 Design of a Broadband Intake Muffler and Its Application in Tractors TAN Yan-zheng , LI Shun-ming , CHENG Chun , ZHANG Zong-zhen ( College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China ) Abstract : The noise in the engine intake system of a tractor is overlarge, which seriously affects physical and mental health of drivers. So, it is necessary to make a noise reduction design. Firstly, the intake noise characteristics are analyzed based on experimental tests. Secondly, based on the theory of straight- through perforation tube, the perforation tube is treated as a resonant silencing element. A multi-cavity resonance-type silencing structure is proposed for broadband noise reduction. Meanwhile, the Virtual.Lab software is used to simulate the acoustic performance of the muffler. Finally, the muffler is assembled into the tractor to