基于阶比分析的风力发电机噪声音调判定  

Determination of the Tonality of Wind Turbines Acoustic Noise Based on Order Analysis

作　　者：徐冠基[1] 柏林[1] 刘小峰[1] 董鹏飞[1] 

机构地区：[1]重庆大学测试中心,重庆400044

出　　处：《振动．测试与诊断》2010年第4期451-454,共4页Journal of Vibration,Measurement & Diagnosis

基　　金：国家高技术研究发展计划("八六三"计划)资助项目(编号:2008AA042408)

摘　　要：为了解决IEC 61400-11标准中基于窄带谱和心理学噪声的风力发电机组噪声音调判定方法在实际应用中出现的频率模糊现象,提出了一种基于阶比分析的改进音调判定方法,将非平稳信号的分析方法,特别是旋转机械振动特征分析方法引入噪声音调的判定过程当中。通过对现场实测信号的对比分析,发现改进的音调判定方法有效地解决了原方法中出现的频率模糊现象,具有一定的工程应用价值。An improved method of tonality determination based on order analysis is suggested to solve the frequency aliasing problem appeared in practical application of the method based on narrowband analysis and psychoacoustics in IEC61400-11 standards.In the improved method,the analysis methods of non-stationary signals,especially the vibration feature analysis methods of rotating machinery,are introduced into the tonality determination procedure.The comparative analysis of field measured noise signals shows that the improved method can effectively solve the frequency aliasing phenomenon existing in the old method.The results show that the method is of a certain value to engineering application.

关 键 词：音调 多项式拟合 阶比分析 等角度采样 A计权声压级 

分 类 号：TB526[理学—物理] TK83[理学—声学]