Dynamic Analysis of a Rotating Cardan Shaft under the Influence of a Breathing Crack and Dense Fluid Force

Figure 9

Time-frequency representation of the unbalanced and cracked system in a viscous fluid at 1447.74 rpm. (a) IF estimation of the immersed cracked driveshaft. (b) IF response of the unbalanced driven shaft. (c) The 3D NWSST representation of the immersed driveshaft. (d) 3D corresponding unbalanced driven shaft. (e) NSTFT from synchrosqueezing wavelet. (f) Corresponding NSTFT of the driven shaft.

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