Hostname: page-component-7bb8b95d7b-pwrkn Total loading time: 0 Render date: 2024-09-18T03:29:11.559Z Has data issue: false hasContentIssue false
  • English
  • Français

Practical application of the rapid frequency sweep technique for structural frequency response measurement

Published online by Cambridge University Press:  04 July 2016

R. G. White  and
R. J. Pinnington
R. G. White
Affiliation:
Institute of Sound and Vibration Research , University of Southampton
R. J. Pinnington
Affiliation:
Institute of Sound and Vibration Research , University of Southampton
Get access Rights & Permissions [Opens in a new window]

Summary

The rapid frequency sweep technique is the result of a considerable amount of research into the development of a transient method for the rapid measurement of structural frequency response, digital data analysis procedures being used to derive the required dynamic characteristics. Theoretical analyses, together with the results of experimental studies and experience gained during structural testing are presented here which illustrate practical considerations and limitations of the method; these range from discussion of exciter attachment, effects of transducers and choice of instrumentation to signal processing methods and related criteria. A simple guide to practical structural testing is given in the final section which outlines procedures to be followed during testing and signal acquisition.

Type
The Real Cost of Air Transport
Information
The Aeronautical Journal , Volume 86 , Issue 855 , May 1982 , pp. 179 - 199
Copyright
Copyright © Royal Aeronautical Society 1982 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Ewins, D. J. and Gleeson, P. T. Experimental determination of multi-directional mobility data for beams. Shock and Vibration Bulletin, 1975, 45(5), 153–173.Google Scholar
2. Lorenzo, C. F. Variable sweep rate testing. A technique to improve the quality and acquisition of frequency response and vibration data. 1970, NASA TN D7022.Google Scholar
3. White, R. G. Use of transient excitation in the dynamic analysis of structures. The Aeronautical Journal of the Royal Aeronautical Society, 1969, 73, 1047–1050.Google Scholar
4. Holmes, P. J. and White, R. G. Data analysis criteria and instrumentation requirements for the transient measurement of mechanical impedance. Journal of Sound and Vibration, 1972, 25(2), 217–243.Google Scholar
5. White, R. G. Effects of non-linearity due to large deflections in the derivation of frequency response data from the impulse response of structures. Journal of Sound and Vibration, 1973, 29(3), 295–307.Google Scholar
6. Kennedy, C. C. and Pancu, C. D. P. Use of vectors in vibration measurement and analysis. Journal of Aeronautical Science, 1947, 14, 603.Google Scholar
7. White, R. G. Effects of non-linearity due to large deflections in the resonance testing of structures. Journal of Sound and Vibration, 1971, 16(2), 255–267.Google Scholar
8. White, R. G. Spectrally shaped transient forcing functions for frequency response testing. Journal of Sound and Vibration, 1972, 23(3), 307–318.Google Scholar
9. Abramowitz, M. and Stegun, I. A. Handbook of mathematical functions. New York, Dover Publications. 1965.Google Scholar
10. White, R. G. Measurement of structural frequency response by transient testing. ISVR Technical Report 12. 1969.Google Scholar
11. Ewins, D. J. Measurement and application of mechanical impedance data: Part I, Introduction and Ground Rules. Journal of the Society of Environmental Engineers, 1975, 3–12. December 1975.Google Scholar
12. Ewins, D. J. Measurement and application of mechanical impedance data: Part II, Measurement Techniques. Journal of the Society of Environmental Engineers, 1976, 23–33. March 1976.Google Scholar
13. Ewins, D. J. Measurement and application of mechanical impedance data: Part III, Interpretation and Application of Measured Data. Journal of the Society of Environmental Engineers, 7–17. June 1976.Google Scholar
14. Pinnington, R. J. and White, R. G. Power flow through machine isolators to resonant and non-resonant beams. Journal of Sound and Vibration, 1981, 75(2), 179–197.Google Scholar
15. Goyder, H. G. D. Methods and application of structural modelling from measured structural frequency response data. Journal of Sound and Vibration, 1980, 68(2),209–230.Google Scholar
16. Clarkson, B. L. and Mercer, C. A. Use of cross-correlation in studying the response of lightly damped structures to random forces. AIAA Journal, 1965. 12, 2287–2291.Google Scholar
17. White, R. G. Evaluation of the dynamic characteristics of structures by transient testing. Journal of Sound and Vibration, 1971, 15(2), 147–161.Google Scholar
18. Timoshenko, S. P. and Goodier, J. N. Theory of Elasticity. McGraw-Hill, 1951.Google Scholar
19. Brownjohn, J. M. W., Steele, G. H., Cawley, P. and Adams, R. D. Errors in mechanical impedance data obtained with impedance heads. Journal of Sound and Vibration, 1980, 73(3), 461–468.Google Scholar
20. Pinnington, R. J. Power transmission from rigid and resonant sources via isolators to resonant and non-resonant structures. ISVR Technical Report 114, 1980.Google Scholar
21. White, M. F. and White, R. G. Frequency response testing in a noisy environment, or with a limited power supply. Journal of Sound and Vibration, 1976, 48(4), 543–557.Google Scholar
22. Pinnington, R. J. Using the envelope of resonance peaks to estimate power absorbed by a finite structure. ISVR Technical Report 115, 1981.Google Scholar
23. Broch, J. T. Mechanical Vibration and Shock Measurements. The Bruel and Kjaer Co. 1976.Google Scholar