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On a systematic approach for cracked rotating shaft study: breathing mechanism, dynamics and instability

Article dans une revue avec comité de lecture
Author
EL AREM, Saber
211916 Laboratoire Angevin de Mécanique, Procédés et InnovAtion [LAMPA]
BEN ZID, Maha
462877 IUT de Saint Malo [IUT de Saint Malo]

URI
http://hdl.handle.net/10985/17206
DOI
10.1007/s11071-017-3367-7
Date
2017
Journal
Nonlinear Dynamics

Abstract

We present a systematic approach to deal with the modeling and analysis of the cracked rotating shafts behaviour. We begin by revisiting the problem of modelling the breathing mechanism of the crack. Here we consider an original approach based on the form we give to the energy of the system and then identify the mechanism parameters using 3D computations with unilateral contact conditions on the crack lips. A dimensionless flexibility is identified which makes the application of the approach to similar problems straightforward. The additional flexibility due to the crack is then introduced in a simple and comprehensive dynamical system (2 DOF) to characterize the crack effects on the dynamical response of a rotating shaft. Many results could help in early crack detection.

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