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What should a vibration-testing engineer know?

 
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Mjr
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Joined: 13 Jul 2005
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PostPosted: Fri Jul 15, 2005 10:49 pm    Post subject: What should a vibration-testing engineer know? Reply with quote


What should a vibration engineer know?

Vibrationdata offers at training course called "Shock and Vibration Response Spectra and Software"

Here are the topics covered:

Quote:

1. Natural frequency and damping from flight data
2. Sine vibration characteristics, GRMS, histogram, kurtosis
3. Sine sweep frequency, octave calculation
4. Random vibration characteristics, GRMS, histogram, kurtosis
5. Nonstationary random vibration, GRMS versus time.
6. Fourier transforms
7. Power spectral density, GRMS
8. Transmissibility function for acceleration
9. Transmissibility function for force
10. Vibration response spectrum - Miles rule
11. Vibration response spectrum - general method
12. Synthesizing time history to satisfy power spectral density using sinusoids
13. Synthesizing time history to satisfy power spectral density using random vibration
14. Integration of acceleration time history to determine displacement and velocity
15. Integration of power spectral density
16. Sample rate criteria/Nyquist rule.
17. Aliasing
18. Filtering
19. Force shock, classical pulse, develop SRS
20. Force shock, arbitrary pulse, develop SRS, arbit program
21. Base excitation, classical pulse, develop SRS, sdofi program
22. Base excitation, arbitrary pulse, develop SRS
23. Integration to velocity and displacement
24. Simple trend removal


Other courses/training packages -- such as the one offered by Diagnostic Instruments in the UK -- concentrate on different issues:

Spectrum Analyser Training -- "designed to familiarise you with the principles of your analysers operation and the process required to define an application setup."

...and:

Vibration Analysis Application Training -- focus on:

    Machinery Vibration Tutorials

    Modal Analysis

    Understanding FFT spectra

    Gear and bearing analysis



And may even go into fundamentals such as:

    vibration basics
    sound basics
    instrument operation, hands on practice
    advanced analysis techniques
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