噪声与振动控制

›› 2011, Vol. 31 ›› Issue (4): 142-144.DOI: 10.3969/j.issn.1006-1355-2011.04.033

• 6.信号处理与故障诊断 • 上一篇    下一篇

偏相干分析在风洞噪声源识别中的应用

顾光武,朱博   

  1. （中国空气动力研究与发展中心，四川 绵阳 621000）
  • 收稿日期:2010-12-24 修回日期:2011-01-14 出版日期:2011-08-18 发布日期:2011-08-18
  • 通讯作者: 顾光武

Application of Partial Coherence for Noise Source Identification in Aeroacoustic Wind Tunnel

GU Guang-wu，ZHU Bo   

  1. ( China Aerodynamics Research and Development Center, Mianyang 621000, Sichuan China )
  • Received:2010-12-24 Revised:2011-01-14 Online:2011-08-18 Published:2011-08-18
  • Contact: GU Guang-Wu

摘要： 噪声源识别对噪声控制具有重要意义。在建立多输入/单输出系统噪声模型，分析介绍噪声源贡献量测量及偏相干分析技术的基础上，给出偏相干函数的条件谱计算公式。针对0.55 m×0.4 m航空声学风洞，拟定噪声测试方案。结合噪声测试数据，表明风洞主要噪声源识别的有效性。

关键词: 声学, 噪声测量, 航空声学风洞, 贡献量, 偏相干函数, 声源识别

Abstract: Identification of noise source is of important significance for noise control. In this paper, a multiple input/single output model for system noise identification is established. The technique of measurement of noise source contribution and partial coherence analysis are introduced and discussed. The formula of partial coherence function is given by “residual spectrum”. Aiming at 0.55m×0.4m aeroacoustic wind tunnel, the measurement scheme is presented. According to the noise measurement data, the main noise source in aeroacoustic wind tunnel is identified.

Key words: acoustics, acoustics measurement, aeroacoustic wind tunnel, contribution, partial coherence function, noise source identification

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