Detecting defaults in turbine blades of planes using acoustic methods
Checking for the state of damage of turbine blades in plane reactors often require to unmount the reactor from the plane wing which costs a huge amount of time and money for aircraft companies.
OBJECTIVE : show the feasibility of a technique to detect a default in a turbine blade using an acoustic method, allowing to check the state of damage of the turbine without unmounting the reactor.
This project is in collaboration between SAFRAN Tech. and Institut Langevin, Paris, France.
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We use a time reversal technique [Fink, 1993] to excite a plate locally using a network of loudspeakers. The plate excitation is measured using a laser vibrometer.
How the vibration modes of the plate are modified with and without the presence of a default on the plate?
How the vibration modes of the plate are modified with and without the presence of a default on the plate?