The two-dimensional fast Fourier transform (2D-FFT) method has been used to analyze the ultrasonic signals where different wave modes overlaid in the time domain.
利用二维快速傅立叶变换的时频分析方法,对有限元计算得到的时域信号进行了分离,得到了各个模式超声波的相速度色散曲线。
The two-dimensional fast Fourier transform (2D-FFT) method has been used to analyze the ultrasonic signals where different wave modes overlaid in the time domain.
利用二维快速傅立叶变换的时频分析方法,对有限元计算得到的时域信号进行了分离,得到了各个模式超声波的相速度色散曲线。
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