Method and apparatus for analyzing non-synchronous blade vibrati

Details Method and apparatus for analyzing non-synchronous blade vibrati Method and apparatus for analyzing non-synchronous blade vibrati

1998-08-21

2000-08-01

Williams, Hezron

Measuring and testing

Vibration

Sensing apparatus

73660, 702 56, G01N 2900

Patent

active

060949899

ABSTRACT:
Non-synchronous vibrations in blades on a rotating wheel, such as a turbine wheel, are measured using Fourier analysis adjusted to correct for uneven sampling produced by a pair of probes spaced from each other about the wheel by a probe angle (PA) other than 180.degree.. The Fourier transform matrix is phase shifted by an amount which is a function of the PA which is other than 180.degree., and the harmonic in which the mode of non-synchronous vibration is expected to be found. A scaling factor in the form of an inverse correction factor is applied to the frequency spectra produced by the phase shifted Fourier transform matrix to generate an output representative of the frequency and amplitude of the true excitation frequency which can be presented on a display.

REFERENCES:
patent: 4389891 (1983-06-01), Fournier
patent: 4518917 (1985-05-01), Oates et al.
patent: 4573358 (1986-03-01), Luongo
patent: 4593566 (1986-06-01), Ellis
patent: 4607529 (1986-08-01), Morey
patent: 4996880 (1991-03-01), Leon et al.
patent: 5148711 (1992-09-01), Twerdochlib et al.
patent: 5206816 (1993-04-01), Hill et al.
patent: 5471880 (1995-12-01), Lang et al.
patent: 5610339 (1997-03-01), Haseley et al.
patent: 5686669 (1997-11-01), Hernandez et al.
patent: 5698788 (1997-12-01), Mol et al.

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