基于近场声全息的稳态工况车外噪声源识别
详细信息 查看官网全文
- 英文论文题名：NAH for Noise Source Mapping Outside the Vehicle under Steady Conditions
- 论文作者：朱旭铿 ; 周毅
- 英文论文作者：Zhu Xukeng ; Zhou Yi ; Clean Energy Automotive Engineering Center ; Tongji University
- 年：2016
- 作者机构：同济大学新能源汽车工程中心;
- 论文关键词：近场声全息 ; 噪声源识别 ; 声场重建 ; LMS Test.Lab
- 英文论文关键词：NAH ; noise source mapping ; sound field reconstruction ; LMS Test.Lab
- 会议召开时间：2016-10-26
- 会议录名称：2016中国汽车工程学会年会论文集
- 英文会议录名称：Proceedings of 2016 SAE-China Congress
- 语种：中文
- 分类号：U467.493
- 学会代码：QCGC
- 会议名称：2016中国汽车工程学会年会暨展览会
- 会议地点：中国上海
- 主办单位：中国汽车工程学会
- 学会名称：中国汽车工程学会
- 页数：5
- 文件大小：1721k
- 原文格式：O
- 会议级别：全国
摘要
首先对近场声全息技术(Near-field Acoustic Holography,NAH)进行了概述,并根据其原理建立了基本数理模型,得到声场的空间变换公式;随后对某B级车的右侧面进行了稳态工况下的近场声全息试验,使用LMS Test.Lab软件的稳态声源识别模块进行声场重建,并对结果进行了验证;根据重建所得数据进行了噪声源识别,得到噪声频率分布的1/3倍频程带为中心频率63Hz(集中于前轮)、630Hz及1250Hz(分布于前后轮)处;结合参考点的噪声峰值频率,分析其低频噪声来源为发动机二阶振动,中高频噪声来源为轮胎噪声即喇叭效应与赫尔姆兹共振。
Near-field acoustic holography is introduced firstly,then the basic mathematical model is established through the NAH theory,and the space transform formula for sound field is gained.With the help of Stationary Array-based Acoustic Source Identification module of LMS Test.Lab,the NAH test which is under steady conditions for the right side of a B car is designed and the result is validated.According to the noise source mapping established by test data,problem frequencies which are distributed over the 1/3 octave band by center frequency of 63 Hz,630Hz and 1250 Hz are confirmed,and the conclusion is gained that low frequency noise is caused by the second order vibration of the engine,while medium- high frequency noise by tire noise.
Near-field acoustic holography is introduced firstly,then the basic mathematical model is established through the NAH theory,and the space transform formula for sound field is gained.With the help of Stationary Array-based Acoustic Source Identification module of LMS Test.Lab,the NAH test which is under steady conditions for the right side of a B car is designed and the result is validated.According to the noise source mapping established by test data,problem frequencies which are distributed over the 1/3 octave band by center frequency of 63 Hz,630Hz and 1250 Hz are confirmed,and the conclusion is gained that low frequency noise is caused by the second order vibration of the engine,while medium- high frequency noise by tire noise.
引文
[1]何琳,朱海潮,邱小军,等.声学理论与工程应用[M].北京:科学出版社,2006:367~376.
[2]胡伊贤,李舜酩,张袁元,等.车辆噪声源识别方法综述[J].噪声与振动控制,2012,32(5):11~15.
[3]陈心昭,毕传兴.近场声全息技术及其应用[M].北京:科学出版社,2013:5-6.
[4]Maynard J D,Williams E G,Lee Y.Nearfield acoustic holography:I.Theory of generalized holography and the development of NAH[J].The Journal of the Acoustical Society of America,1985,78(4):1398-1412.
[5]庞剑,谌刚,何华.汽车噪声与振动——理论与应用[M].北京:北京理工大学出版社,2006:94-96.
[6]靳晓雄,张立军.汽车噪声的预测与控制[M].上海:同济大学出版社,2004:186-188.
[7]Hald J,Nielsen F K,Blaabjerg C.Patch NAH for Noise Source Mapping in Cabin Environments[R].SAE Technical Paper,2005.
[8]陈霞.轮胎噪声分析评价及试验研究[D].武汉:武汉理工大学,2012:7-8.
[2]胡伊贤,李舜酩,张袁元,等.车辆噪声源识别方法综述[J].噪声与振动控制,2012,32(5):11~15.
[3]陈心昭,毕传兴.近场声全息技术及其应用[M].北京:科学出版社,2013:5-6.
[4]Maynard J D,Williams E G,Lee Y.Nearfield acoustic holography:I.Theory of generalized holography and the development of NAH[J].The Journal of the Acoustical Society of America,1985,78(4):1398-1412.
[5]庞剑,谌刚,何华.汽车噪声与振动——理论与应用[M].北京:北京理工大学出版社,2006:94-96.
[6]靳晓雄,张立军.汽车噪声的预测与控制[M].上海:同济大学出版社,2004:186-188.
[7]Hald J,Nielsen F K,Blaabjerg C.Patch NAH for Noise Source Mapping in Cabin Environments[R].SAE Technical Paper,2005.
[8]陈霞.轮胎噪声分析评价及试验研究[D].武汉:武汉理工大学,2012:7-8.