Fan blade crack fault diagnosis method based on Hilbert-Huang transformation
A blade crack and fault diagnosis technology, applied in the analysis of materials, the use of sonic/ultrasonic/infrasonic waves to analyze solids, instruments, etc., can solve the nonlinear problem of blade cracks without general, unstable, complex vibration and other problems, to ensure failure The effect of diagnosis rate, guaranteed accuracy rate and fast diagnosis speed
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[0016] Specific implementation
[0017] In order to explain in detail the main features and specific operation steps of the present invention, the description will now be made with the accompanying drawings.
[0018] Step S1: Establish an expanded sample database of fan blade crack faults through simulation.
[0019] The specific processing is as follows:
[0020] Step S1.1: Establish a fan blade crack model through simulation, and set various degrees of blade crack failure.
[0021] Step S1.2: Perform modal analysis on the blade crack fault model through finite element simulation to obtain simulation data, and establish an expanded sample database of fan blade crack faults.
[0022] Step S2: Obtain vibration mode displacement parameters (ie, vibration mode displacement values) of the fan blades under normal and varying degrees of crack failure states through the test system, and establish a database of fan blade crack failures.
[0023] The specific processing is as follows:
[0024] Step...
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