Theoretical and Experimental Study on the Transient Time-Frequency Characteristics of the Bending-Torsional Coupling Motions of a Rub-Impact Dual-Rotor System

<div>Transient time-frequency waterfall curves of the bending and torsional motions of the rotor system without the rub-impact fault. (a) Bending motion and (b) torsional motion.</div>

Shock and Vibration

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Figure 9

Figure 9: Theoretical and Experimental Study on the Transient Time-Frequency Characteristics of the Bending-Torsional Coupling Motions of a Rub-Impact Dual-Rotor System 

Figure 9 | Theoretical and Experimental Study on the Transient Time-Frequency Characteristics of the Bending-Torsional Coupling Motions of a Rub-Impact Dual-Rotor System 