偏相干分析在风洞噪声源识别中的应用  

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

作　　者：顾光武[1] 朱博[1] 

机构地区：[1]中国空气动力研究与发展中心,四川绵阳621000

出　　处：《噪声与振动控制》2011年第4期142-144,177,共4页Noise and Vibration Control

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0.55m×0.4m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。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.

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 

分 类 号：V211.74[航空宇航科学与技术—航空宇航推进理论与工程]