7. RotorDynamics and Active Detection of Faults in Rotating Bodies

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Gasch (1976) - “Breathing Crack Model”General non-linear EOMWeight dominance assumptionLinear Periodic Time VariantM q + (C + G) q + (K 0+ K(t)) q = f (t) Kq 0In papers crack depths are taken at 40% -75% !!!Gasch, R., "A Survey of the Dynamic Behaviorof a Simple Rotating Shaft with a TransverseCrack", Journal of Sound and Vibration, Vol.160(2), pp. 313-332, 1993.
First forward critical speed :62.9 Hz2nd forward critical speed:208 HzI. Bucher
Page 1 and 2: Rotor Dynamics andActive Detection
Page 9 and 10: Disk dynamicsDifferences & similari
Page 11 and 12: RotationStationary excitation & res
Page 14 and 15: Transient signal&signal processingI
Page 16 and 17: Forward & backward whirlseparationI
Page 18 and 19: Time-frequency• SpectrogramI. Buc
Page 20 and 21: Campbell diagram - measuredfrequenc
Page 22: Complete test-rigI. Bucher
Page 29 and 30: Test Rig - OverviewLaserMeasurement
Page 31 and 32: Using laserDisksMeasurement systemI
Page 33 and 34: 21Actuator &sensorActuator &sensorI
Page 35: Whirl in presence of a crack0 O0 Of
Page 39 and 40: Kirson Y. Problems relating to bala
Page 41 and 42: Shaft anisotropyDeviatory stiffness
Page 43 and 44: sensorHarmonic balance & Taylor exp
Page 45 and 46: 53I. Bucher
Page 47 and 48: asymmetric rotor with and without a
Page 49 and 50: frequencyspeed59I. Bucher
Page 51 and 52: I. Bucher
Page 53 and 54: Thank youI. Bucher
Page 55 and 56: Angular unbalanceAsymmetric discDoF
Page 57 and 58: Perfectly balancedSymmetric disce3A
Page 59 and 60: Classical Rotor Dynamics Modelling3
Page 61 and 62: SDT Rotor1 D beam/mass (critical sp
Page 63 and 64: Inertial C.S.General formSeries Sol
Page 65 and 66: Engine order domain+forwardtime (sp
Page 67 and 68: 26I. Bucher
Page 69 and 70: I. Bucher

7. RotorDynamics and Active Detection of Faults in Rotating Bodies

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