摘要
为了改变传统赫谢尔·昆克(Herschel-Quincke,HQ)管在降噪频率上的单一性,使其能在复杂噪声环境下灵活调节降噪频率。设计了一种加装球阀的可调频HQ管,利用球阀的旋转调节HQ管内的横截面积,通过管内的阻抗改变来调节整个装置的固有频率,最终达到可以灵活调节降噪频率的目的。推导出了可调频HQ管内的阻抗理论模型,从而得到可调频HQ管的频率范围,并利用COMSOL仿真计算得到其传声损失来检验其消声性能。通过实验结果与仿真结果进行对比验证,证明了结果的准确性,在实验数据和仿真数据中发现,开口面积的对数与固有频率呈线性关系,而且实验数据表明,可调频范围为187.5~296 Hz,可调节的频带宽度达到了108.5 Hz。
In order to improve the sound control performance of the traditional Herschel-Quincke(HQ)tube with a fixed natural frequency,and to make the HQ tube applicable in a complex noise frequency environment,a mounted ball valve is used to adjust the natural frequency of HQ tube for making the HQ tube tunable.Based on impedance theory model,the maximum tunable frequency range is derived.To further analyze the sound control performance of the proposed tunable HQ tube,the sound transmission loss is calculated by using COMSOL software.Finally,the tunable HQ tube is designed and verified by experiments.The calculated and experimental results show that the natural frequency of the HQ is increased linearly with the opening cross-section area.It is also found that the tunable frequency range is from 187.5 to 296 Hz,i e.the adjustable frequency band-width is 108.5 Hz for the proposed tunable HQ tube.
作者
王恒
毛崎波
齐成婧
WANG Heng;MAO Qibo;QI Chengjing(School of Aircraft Engineering,Nanchang Hangkong University,Nanchang 330063,Jiangxi,China)
出处
《声学技术》
CSCD
北大核心
2021年第4期540-544,共5页
Technical Acoustics
基金
国家自然科学基金资助项目(51975266)、江西省自然科学基金(20192BAB206024)、江西省研究生创新专项资金项目(YC2020-S545)。
关键词
可调频HQ管
声阻抗理论
传声损失
tunable Herschel-Quincke(HQ)tube
acoustic impedance theory
sound transmission loss
