Effect of Material Damage on Parameters of the Torsional Wave Propagated in the Deformed Rotor

A.B. Dar’enkov, A.S. Plekhov, V.I. Erofeev

Abstract


The proposed approach allows formulation of a self-consistent problem that includes an equation, which describes rotor dynamics, and an equation, which describes the damage to the material of the rotor. It is shown that damage to the material causes frequency-dependent attenuation and phase speed dispersion of elastic torsion waves, which allows acoustic assessment of the damage. The applied field of deformations, in turn, leads to damage accumulation. The resulting kinetic equation shows that increase in damage has exponential character. System parameters were assessed, which make it possible to consider accumulation of damage linear in time.

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References


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DOI: http://dx.doi.org/10.24892/RIJIE/20160309

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