根据对小波能谱的分析 ,提出了基于小波分析的辨识相干结构的能量最大准则 ,能分辨湍流信号中多个相近尺度的相干结构 ;根据对不同小波的计算 ,发现常用小波中以Morlet小波的分辨率最高 ,能有效地分辨基波与次谐波 ;并用模拟信号和圆形湍流射流边界层内的实验数据对上述结论进行了验证 . Based on the analysis of wavelet energy spectrum, the maximum energy criterion for identifying coherent structures based on wavelet analysis is proposed, which can resolve coherent structures of many similar scales in turbulent signals. Based on the calculation of different wavelet, it is found that Morlet wavelet The resolution is the highest, which can effectively distinguish the fundamental and the subharmonic. The above conclusions are verified by the experimental data in the boundary layer of the turbulent jet and the analog signal.