Equivalent modal model for a gas turbine stator blade gotten from impact tests

This The gas turbines performance much depends on the dynamic behavior of the air flow through its different stages, specifically how the air is compressed at the compressor and how does it expands and releases its energy by rotating the turbine shaft. Because of the recent commercial gas turbine configurations monitor the behavior of air flow just through specific sensors punctually located, the work described here provides the basis for the proposal of a system of monitoring the flow through the vibrational response of the sets of blades arranged in the stator of the compressor and turbine; so here the procedure of obtaining a reduced modal model equivalent of a stator blade of a compressor is described. The resulting model is adjusted by experimental measurements, so the whole mass and stiffness values from the equivalent model calculated vibrate at the same natural frequency at which the stator blade does.