Non-synchronous vibrational excitation of turbine blades...

Details Non-synchronous vibrational excitation of turbine blades... Non-synchronous vibrational excitation of turbine blades...

2007-09-27

2010-02-02

Williams, Hezron (Department: 2856)

Measuring and testing

Vibration

Sensing apparatus

C073S593000

Reexamination Certificate

active

07654145

ABSTRACT:
A method of measuring vibration in a bladed rotor structure with a vibration monitor. The vibration monitor includes a sensor for sensing passage of the sensor targets on radially outer portions of the blade structure, and the sensor generates signals corresponding to target passing events. An excitation structure is provided including at least one air jet for providing an excitation force to the blade structure. The blade structure is rotated about an axis of rotation and the air jet is driven in a circular path about the axis of rotation at a different rotational speed to apply a non-synchronous excitation force to the blade structure.

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