Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
VIBRATION RESPONSES OF A CRACKED ROTATING SHAFT WITH COMBINATION RESONANCES TECHNIQUE
Submission Author:
Izabela Batista da Silva , MG , Brazil
Co-Authors:
Izabela Batista da Silva, Aldemir Ap Cavalini Jr, Valder Steffen Jr
Presenter: Izabela Batista da Silva
doi://10.26678/ABCM.COBEM2019.COB2019-0966
Abstract
Recently, a crack identification methodology based on parametric vibration responses was proposed. This technique uses externally applied forces at specific frequencies attaining combination resonances to characterize crack signatures in the spectral responses of flexible rotors. The multiple scale method is used to determine the conditions required to create resonances on the system as a combination of the excitation frequency and the critical speeds of the machine. The external force is applied in the shaft operating under a steady-state condition. In this context, the present work compares the numerical and experimental vibration responses of a horizontal rotating shaft with a breathing crack. The combination resonances on the spectral vibration responses of the rotor are verified in both numerical and experimental tests. Similar results were obtained.
Keywords
rotating machines, transverse cracks, combination resonances, breathing behavior
