Method for determining axial position of blade of rotor in gas turbine of aircraft, involves comparing actual and theoretical vibration patterns, and determining vibration mode and axial position of blade based on result of comparison

摘要

The method involves measuring vibration of a blade (18) of a rotor (12) in a rotor operation at set of axial measuring positions. An actual vibration pattern is determined from the measurement of the vibration of the blade. The actual vibration pattern is compared with theoretical vibration patterns that are representative for different vibration modes and axial positions of the blade. The vibration mode and the axial position of the blade are determined based on a result of the comparison. An independent claim is also included for a measuring device for determining vibration of a blade of a rotor of a turbo machine.