基于Kirchhoff方法的航空地板声反射问题研究
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- 英文论文题名：The influence of a 3/4 open jet floor on the far field noise measurements in anechoic wind tunnel
- 论文作者：张军 ; 陈鹏
- 英文论文作者：ZHANG Jun ; CHEN Pen ; Key Laboratory of Aerodynamic Noise Control ; China Aerodynamics Research and Development Center ; State Key Laboratory of Aerodynamics ; China Aerodynamics Research and Development Center
- 年：2016
- 作者机构：中国空气动力研究与发展中心气动噪声控制重点实验室;中国空气动力研究与发展中心空气动力学国家重点实验室;
- 论文关键词：声学风洞 ; 3/4开口地板 ; 噪声测量 ; 声场 ; Kirchhoff-Helmholtz公式
- 英文论文关键词：Anechoic wind tunnel ; 3/4 open jet floor ; Noise measurement ; Sound fields ; Kirchhoff-Helmholtz method
- 会议召开时间：2016-11-04
- 会议录名称：2016年度全国气动声学学术会议论文摘要集
- 语种：中文
- 分类号：O422.3
- 学会代码：LTLX
- 会议名称：2016年度全国气动声学学术会议
- 会议地点：中国北京
- 主办单位：中国航空学会航空声学专业委员会、中国航空学会气动声学专业委员会、中国商飞上海飞机设计研究院、北京航空航天大学
- 学会名称：北京航空航天大学流体力学教育部重点实验室
- 页数：8
- 文件大小：1290k
- 原文格式：D
- 会议级别：全国
摘要
利用Kirchhoff-Helmholtz声学理论建立了地板声波反射问题的时域理论模型,推导了地板面上反射波的幅值函数和延迟时间的表达式,并引入了恰当的数值方法对反射声场进行求解,理论方法的正确性得到了实验结果的验证。以典型的高斯调制正弦波脉冲和连续正弦波为例,用建立的理论方法对噪声信号的传播过程和平台地板对远场噪声测量的影响进行了数值模拟研究,结果表明:地板的存在将使得远场接收到的噪声信号中出现直达波和反射波,反射波包含了中心波和边缘波。在低频段,地板宽度增加,远场噪声声压级增大;在高频段,地板宽度增加对远场总噪声级影响不明显。对于高速列车模型,车底位置的声源比车顶位置的声源在高频段受到地板反射的影响更大。
Based on the Kirchhoff-Helmholtz diffraction theory, a transient theoretical model for the reflection of spherical sound wave form a 3/4 open jet floor is obtained, and the amplitude shading and time delay function for the reflection sound pressure on the floor is derived.A numerical method is introduced to solve the reflection sound field.The correctness of the present method is verified by an experiment using a B.K.4204 source in the anechoic wind tunnel.In this study, sin-burst pulse and continuous sinusoidal wave are used respectively to study the propagation of the sound wave and the influence of the 3/4 open jet floor on the far field noise measurements, and the following results are obtained: the received sound signal contains the directed wave and the reflection wave, and the reflection wave is further divided into the center wave and the edge wave.In the low frequency range, increase the floor width, the far field sound pressure level is increased accordingly.While in the high frequency range, increasing the floor width has non-obvious effect on the far field noise level.For a high speed train model, the bogie noise source is easier to be influenced by the floor than the pantograph noise source.
Based on the Kirchhoff-Helmholtz diffraction theory, a transient theoretical model for the reflection of spherical sound wave form a 3/4 open jet floor is obtained, and the amplitude shading and time delay function for the reflection sound pressure on the floor is derived.A numerical method is introduced to solve the reflection sound field.The correctness of the present method is verified by an experiment using a B.K.4204 source in the anechoic wind tunnel.In this study, sin-burst pulse and continuous sinusoidal wave are used respectively to study the propagation of the sound wave and the influence of the 3/4 open jet floor on the far field noise measurements, and the following results are obtained: the received sound signal contains the directed wave and the reflection wave, and the reflection wave is further divided into the center wave and the edge wave.In the low frequency range, increase the floor width, the far field sound pressure level is increased accordingly.While in the high frequency range, increasing the floor width has non-obvious effect on the far field noise level.For a high speed train model, the bogie noise source is easier to be influenced by the floor than the pantograph noise source.
引文
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[6]Feng F and Wang Q.Analysis of acoustic field of primary vortex pairing in subsonic plane mixing layers using Kirchhoff medhod[J].Acta Aeronautica et Astronautica Sinca,2013,34(3):464-473(in Chinese).冯峰,王强.基于Kirchhoff方法的亚声速平面混合层主涡对并声场分析[J].航空学报,2013,34(3):467-473.
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[16]Sun Z X,Song J J,An Y R.Numerical simulation of aerodynamic noise generated by CRH3 high speed trains[J].Acta Scientiarum Naturalium Universitatis Pekinensis,2012,.(in Chinese)孙振旭,宋婧婧,安亦然.CRH3型高速列车气动噪声数值模拟研究[J].北京大学学报,2012,48(5):701-711.
[2]Gao Y,Wang Y G,Yang Z G et al..Testing study of aerodynamic noise for high speed train model in aeroacoustic wind tunnel[J].Technical Acoustics,2013,32(6):506-510(in Chinese).高阳,王毅刚,杨志刚等.声学风洞中的高速列车模型气动噪声试验研究[J].声学技术,2013,32(6):506-510.
[3]Yang Z G,Li B L,Wang Y G.Influence of supporting plate on aero-acoustic wind tunnel test for high speed train[J].Technical Acoustics,2013,32(6):500-505.(in Chinese).杨志刚,李保林,王毅刚.支撑地板对高速列车模型风洞气动噪声试验影响[J].声学技术,2013,32(6):500-505.
[4]Zhang J,Zeng X W.Transient axial solution for the reflection of a spherical acoustic pulse from a concave rigid parabolic reflector[J].Acta Acustica united with Acustica,2013,99(6):867-875.
[5]Zhang J,Zeng X W.Transient axial solution for the reflection of a spherical wave from a parabolic reflector[C].Technical Acoustics,2013,32(6):53-54(Pt.2)(in Chinese).张军,曾新吾.沿抛物面轴线球面波反射声场的时域解析解[C].第十届中国声学学会青年学术会议,10月23日,重庆.声学技术,2013,32(6):53-54(Pt.2).
[6]Feng F and Wang Q.Analysis of acoustic field of primary vortex pairing in subsonic plane mixing layers using Kirchhoff medhod[J].Acta Aeronautica et Astronautica Sinca,2013,34(3):464-473(in Chinese).冯峰,王强.基于Kirchhoff方法的亚声速平面混合层主涡对并声场分析[J].航空学报,2013,34(3):467-473.
[7]Hou H,Wang C,Yang J H et al..Active noise absorption by multisources in free field[J].Acta Acoustica Sinca.1994,19(3):188-195.(in Chinese)侯宏,王冲,杨建华等.多声源的自由场有源声吸收[J].声学学报,1994,19(3):188-195.
[8]Lasota H,Salamon R and Delannoy B.Acoustic diffraction analysis by the impulse response method:A line impulse response approach[J].J.Acoust.Soc.Am.,1984,76(1):280-290.
[9]Skudrzyk S.The foundations of acoustics[M]New york:Springer-Verlag,1971.Chap.3.
[10]Delannoy B,Lasota H and Brunnel C.The infinite planar baffles problem in acoustic radiation and its experimental verification[J].J.Appl.Phys.,1979,50:5189-5195.
[11]Piwakowski B,Delannoy B.Method for computing spatial pulse response:Time-domain approach[J].J.Acoust.Soc.Am.,1989,86(6):2422-2432.
[12]Piwakowski B,Sbai K.A new approach to calculate the field radiate from arbitrarily structured transducer arrays[J].IEEE Trans.on UFFC,1999,46(2):422-440
[13]Franco E E,Andrade A B,Adamowski et al..Acoustic beam modeling of ultrasonic transducers and arrays using the impulse response and the discrete representation methods[J].J.of the Braz.Soc.of Mech.Sci.&Eng.,2011,33(4):408-416.
[14]Lucas B G,Muir T G.The field of a focusing source[J].J.Acoust.Soc.Am.,1982,73(4):1289-1296.
[15]ZHANG J,GUO T,SUN B C et al..Research on characteristics of aerodynamic noise source for high-speed train[J].Journal of the China Railway Society.2015,37(6):10-18.(in Chinese)张军,郭涛,孙帮成等.高速列车气动噪声源特性研究[J].铁道学报,2015,37(6):10-18.
[16]Sun Z X,Song J J,An Y R.Numerical simulation of aerodynamic noise generated by CRH3 high speed trains[J].Acta Scientiarum Naturalium Universitatis Pekinensis,2012,.(in Chinese)孙振旭,宋婧婧,安亦然.CRH3型高速列车气动噪声数值模拟研究[J].北京大学学报,2012,48(5):701-711.