摘要
涡轮增压器进气管道的气动噪声严重影响着汽车的安全性和舒适度,由于穿孔管对中高频率宽频噪声具有良好的消声性能,因而得到广泛应用。该文设计一种模块化穿孔管串并联耦合的消声器结构,在分析消声器在常温无流与气固耦合状态下的模态频率与振型的基础上,研究气流流速对消声器模态频率和振型的影响规律以及消声器内部的气流再生噪声,气流的存在抑制消声器的消声效果,但并不改变整体趋势。利用COMSOL软件声固耦合模块计算消声器的传递损失,仿真结果表明该消声器在470-4500 Hz频率范围内的传递损失幅值均为20 dB及以上,有效地衰减中高频率噪声。实验结果与仿真结果的上限频率和下限频率基本吻合,但在2400-3500 Hz频率范围内幅值偏差较大。
The aerodynamic noise of the turbocharger intake pipeline has a serious impact on the safety and comfort of the vehicle.Because the perforated tube has a good noise reduction performance for the medium and high frequency broadband noise,it has been widely used.In this paper,we design a modular parallel of perforated tube muffler structure of coupling,on the analysis of the muffler in the condition of normal temperature without flow and gas solid coupling of the modal frequency and vibration mode on the basis of the study of airflow velocity influence on modal frequency and vibration mode muffler and muffler internal flow regeneration noise,the existence of the airflow suppresses the noise elimination effect of muffler,but does not change the overall trend.The acoustic solid coupling module of COMSOL software was used to calculate the transmission loss of the muffler.The simulation results showed that the transmission loss amplitude of the muffler in the frequency range of 470–4500 Hz reached more than 20 dB,effectively attenuating the mediumhigh frequency noise.The experimental results are basically consistent with the upper and lower frequencies of the simulation results,but the amplitude deviation is large in the frequency range of 2400–3500 Hz.
作者
陈龙虎
李立涛
蔺强
韩冬
吕海峰
CHEN Longhu;LI Litao;LIN Qiang;HAN Dong;LÜHaifeng(School of Mechanical Engineering,North University of China,Taiyuan 030051,China;Hebei Chinaust Automotive Plastics Co.,Ltd.,Zhuozhou 072750,China)
出处
《中国测试》
CAS
北大核心
2021年第3期9-15,共7页
China Measurement & Test
基金
国家青年基金(51305409)
山西省青年科技研究基金项目(2013021020-2)。
关键词
宽频噪声
串并联耦合
模态分析
传递损失
broadband noise
series and parallel coupling
modal analysis
transmission loss
