Non-contact-measurement closed-loop-vibration blade fatigue testing method
A non-contact measurement and vibration test technology, applied in the field of blade vibration fatigue, can solve the problems of inability to test small blade fatigue, long fatigue test cycle, low efficiency, etc., to improve control accuracy and measurement accuracy, reduce labor intensity, and ensure accuracy sexual effect
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[0026] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and a preferred embodiment.
[0027] The closed-loop vibration test method for blade fatigue non-contact measurement involved in this embodiment can use figure 1 The system implementation shown can include:
[0028] An electric vibrating table 1 for providing an exciting force to the blade 6 and at least keeping the blade 6 in a resonance state during the test;
[0029] Acceleration sensor 3 for constant vibration frequency sweeping;
[0030] A clamp 8 for clamping the blade 6 and a compression screw 81 for adjusting the clamping force of the blade 6;
[0031] Strain sensor 5 for monitoring changes in the stress of the blade 6;
[0032] A laser displacement sensor 4 for monitoring the amplitude of a selected part of the blade 6; and,
[0033] The measurement control unit 2 is used to receive and process the signals of the strain sensor 5 and the laser displ...
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