| 封闭腔体噪声控制中亥姆霍兹共振器的优化设计方法 |
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| 引用本文： | 王正敏,饶伟,李德玉.封闭腔体噪声控制中亥姆霍兹共振器的优化设计方法[J].声学学报,2019,44(5):834-842. |
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| 作者姓名： | 王正敏 饶伟 李德玉 |
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| 作者单位： | 1. 惠州迪芬尼声学科技股份有限公司 声学解决方案事业部 惠州 516000; |
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| 摘 要： | 提出用亥姆霍兹共振器控制声腔内噪声时计算共振器最优阻尼比和最优工作带宽的理论公式,并进行实验验证。首先,建立共振器与待控腔体的声学耦合方程,以最小化腔体内目标声压幅值为参考,对共振器的阻尼比和工作带宽进行理论分析,求出最优阻尼比和最优工作带宽的计算公式。接着,提出在声腔噪声控制中使用最优亥姆霍兹共振器的实施步骤。最后,以一维声学腔体内的噪声为控制对象,通过对比控制前后的理论结果与实测数据,验证最优阻尼比和最优工作带宽的理论公式。结果表明,本文开发的亥姆霍兹共振器优化设计方法能准确地预报共振器的最优阻尼比与最优工作带宽,在声腔中低频噪声控制中有广泛的应用前景。
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| 关 键 词： | 腔内噪声控制 亥姆霍兹共振器 阻尼比 模态体积比 |
| 收稿时间： | 2017-05-22 |
Optimal design method of Helmholtz resonators for noise control in enclosures |
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| Affiliation: | 1. Tymphany Acoustics Technology Corporation Limited Company, Acoustics Solution Business, Huizhou 516000;2. Naval Achitecture and Ocean Engineering, South China University of Technology, Guangzhou 510640 |
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| Abstract: | The analytical formulas of optimal damping ratio and working frequency band of a Helmholtz resonator for the interior noise control were developed and experimentally validated.Based on the coupled acoustic equations between the enclosure under control and a Helmholtz resonator,formulas for calculating optimal damping ratio and working frequency band of the resonator,to minimize the targeted sound pressure level inside the enclosure,were obtained.Then,detailed steps using the optimally designed acoustic resonators to attenuate noise in an enclosure were also proposed.Finally,a series of acoustic measurements were conducted in a one-dimensional duct to validate the developed formulas.The theoretical and experimental results demonstrated that the presented optimal design method can predict the optimal damping ratio and working frequency band for Helmholtz resonators with high accuracy,and it has a great potential in the interior noise control from low to middle frequencies. |
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