一种快速测试多孔介质声学特征参数的方法
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摘要
目前有效易实施的噪声控制方法是使用多孔材料,但其特征参数测试耗时长、花费多,且需要多个专业测量设备,限制了多孔材料的广泛应用。从声学测量角度出发,设计了一个试验台,可以同时测试多孔介质中声传播的所有特征参数。测试基于Johnson-Allard和Lafarge-Allard两种理论模型,旨在确定流阻、孔隙率、曲率、黏性特征长度、热特征长度和热渗透性等特征参数的值。首先介绍了各参数的基本测试原理,然后以毛毡为例对多孔材料样本的完整声学特性进行测试来介绍整个测量过程,并评价了测试方法的可靠性。
An effective and easy method for noise control is the use of porous materials. While the characteristic parameter exist shortcomings of test time consuming, expensive and require multiple professional measurement equipment,that limits the extensive application of porous materials. This paper designed a test-bed from the Angle of acoustic measurement,which can test all the characteristic parameters of acoustic propagation in porous media at the same time.The measuring method based on two theoretical models of Johnson-Allard and Lafarge-Allard models,aims to determine characteristic parameters such as flow resistance,porosity,tortuosity,the viscosity characteristic length,thermal characteristic length and thermal permeability. This paper introduces the basic testing principle of each parameter firstly,and then take felt for example,test all the acoustic characteristics of porous material to introduce the whole measurement process,and evaluate the reliability of the test method.
An effective and easy method for noise control is the use of porous materials. While the characteristic parameter exist shortcomings of test time consuming, expensive and require multiple professional measurement equipment,that limits the extensive application of porous materials. This paper designed a test-bed from the Angle of acoustic measurement,which can test all the characteristic parameters of acoustic propagation in porous media at the same time.The measuring method based on two theoretical models of Johnson-Allard and Lafarge-Allard models,aims to determine characteristic parameters such as flow resistance,porosity,tortuosity,the viscosity characteristic length,thermal characteristic length and thermal permeability. This paper introduces the basic testing principle of each parameter firstly,and then take felt for example,test all the acoustic characteristics of porous material to introduce the whole measurement process,and evaluate the reliability of the test method.
引文
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[2]孙少明.风机气动噪声控制耦合仿生研究[D].吉林:吉林大学博士论文,2008.
[3]孙敏,张倩索,张荣,等.前置放大器的低噪声设计[J].长春理工大学学报:自然科学版,2011,34(2):51-53.
[4]弯艳玲,李守魁,李元宝.附加质量块对某型轿车车内噪声影响的试验研究[J].长春理工大学学报:自然科学版,2013,36(6):82-85.
[5]Iain D.J.Dupère,卢天健,Ann P.Dowling.声学多孔材料的孔结构优化[J].西安交通大学学报,2007,(11):1251-1256.
[6]王建忠,汤慧萍,敖庆波,等.金属纤维多孔材料复合结构的声学性能[J].中国材料进展,2017,36(Z1):550-556,565.
[7]王星博.多孔材料元胞自动机声学建模及高声压激励下材料的声学性能研究[D].银川:宁夏大学,2016.
[8]王亚南.含多孔层和不同材料层的复合隔墙板的隔声探究[D].南昌:南昌航空大学,2015.
[9]孙文娟,苏巧平,刘丽.微穿孔板吸声体混合结构的声学性能研究[J].世界科技研究与发展,2016,38(06):1165-1169.