Blade shroud vibration monitor

Details Blade shroud vibration monitor Blade shroud vibration monitor

2011-01-04

2011-01-04

Surin, J M Saint (Department: 2856)

Measuring and testing

Vibration

Sensing apparatus

C073S593000, C073S649000

Reexamination Certificate

active

07861592

ABSTRACT:
A method for predicting a blade structure failure within a coupled blade structure including a plurality of blades supported for rotation on a rotor and a shroud structure coupling the blades. The method includes the steps of determining displacements of a plurality of predetermined circumferential locations on the shroud structure during rotation of the blade row, where the displacements are provided as a function of time relative to the periodic rotation of the shroud structure for time intervals that are integer multiples of rotor rotation. A signal characteristic related to vibrational mode and a nodal diameter of the shroud structure is derived based on the displacements of the circumferential locations on the shroud structure.

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