On the use of non-linear vibrations and the anti-resonances of Higher-Order Frequency Response Functions for crack detection in pipeline beam

Jean-Jacques Sinou (1)

1 LTDS - Laboratoire de Tribologie et Dynamique des Systèmes

The identification of new scientific challenges, as well as the increasing high-performance computing support, indicates that the benefits of applying novel nonlinear techniques for crack detection will continue to grow. So, significant effort has been invested in recent years to develop effective techniques to detect crack in mechanical structures. The objective of this paper is to discuss and propose a robust diagnostic of damage based on non-linear vibrational measurements with particular regard to the Higher-Order Frequency Response Functions. An important observation is that the appearances of the non-linear harmonic components and the emerging anti-resonances in Higher-Order Frequency Response Functions can provide useful information on the presence of cracks and may be used on an on-line crack monitoring system for small levels of damage. Efficiency of the proposed methodology is illustrated through numerical examples for a pipeline beam including a breathing crack.

Mots clés: Crack; Non-linear dynamic; n-FRF

Domaines: Vibrations [physics.class-ph]; Vibrations [physics.class-ph]; Mécanique [physics.med-ph]; Mécanique des structures [physics.class-ph]; Mécanique des structures [physics.class-ph]; Mécanique des solides [physics.class-ph]; Mécanique des solides [physics.class-ph]; Systèmes dynamiques [math.DS]

Jean-Jacques Sinou. On the use of non-linear vibrations and the anti-resonances of Higher-Order Frequency Response Functions for crack detection in pipeline beam. Mechanics Research Communications, 2012, 43, pp.87-95. ⟨10.1016/j.mechrescom.2012.03.006⟩. ⟨hal-00703212⟩