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TECHNICAL PAPERS

Spatially Continuous Power Flow Using a Scanning Laser Doppler Vibrometer

[+] Author and Article Information
Jonathan D. Blotter

Mechanical Engineering Department, Brigham Young University, Provo, UT 84602-4201e-mail: jblotter@byu.edu

Robert L. West

Department of Mechanical Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061-0238e-mail: westrl@vt.edu

Scott D. Sommerfeldt

Department of Physics and Astronomy, Brigham Young University, Provo, UT 84602e-mail: s_sommerfeldt@byu.edu

J. Vib. Acoust 124(4), 476-482 (Sep 20, 2002) (7 pages) doi:10.1115/1.1497363 History: Received August 01, 2001; Revised December 01, 2001; Online September 20, 2002
Copyright © 2002 by ASME
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References

Pavic,  G., 1976, “Measurement of Structure Borne Wave Power Flow, Part 1: Formulation of the Methods,” J. Sound Vib., 49, pp. 221–230.
Center Technique Des Industries Mecaniques, 1990, Proceedings of the Structural Intensity and Vibration Energy Flow; 3rd International Congress on Intensity Techniques, Senlis, France.
Center Technique Des Industries Mecaniques, 1993, Proceedings of the Structural Intensity and Vibration Energy Flow; 4th International Congress on Intensity Techniques, Senlis, France.
23rd–29th International Congresses on Noise Control Engineering (Inter-Noise), several papers and sessions in each of these conferences have been dedicated to power flow and structural intensity developments.
Benes, E., Exner, C., Fock, C., Groschl, M., and Pavic, G., 1995, “Multipoint Optical Measurement of Structural Intensity,” Proceedings of Inter-Noise 95, Vol. 1, pp. 665–668.
Lindholm, B. E., 1996, “Three-Dimensional Position Registration of a Scanning Laser Doppler Vibrometer,” Proceedings of the 14th International Modal Analysis Conference, pp. 830–836.
Montgomery, D. E., West, R. L., and Nguyen, P. P. H., 1994, “Modeling of 3-D Velocity Response Fields Using a Least Squares Discrete Finite Element Formulation,” Proceedings of the 12th International Modal Analysis Conference, Vol. 2, pp. 926–932.
Blotter, J. D., and West, R. L., 1995, “Experimental Mechanical Intensity in Plates Using a Scanning Laser Doppler Vibrometer,” Proc. 13th Int. Modal Analysis Conference, Vol. 2, pp. 762–772.
Noiseux,  D. U., 1970, “Measurement of Power Flow in Uniform Beams and Plates,” J. Acoust. Soc. Am., 47, pp. 238–247.
Blotter, J. D., 1996, “Structural Energy and Power Flow Using a Scanning Laser Doppler Vibrometer,” Ph.D. dissertation, Virginia Polytechnic Institute.
Cremer, L., Heckl, M., and Ungar, E. E., 1973, Structure-Borne Sound, Springer-Verlag, New York.
Verheij,  J. W., 1980, “Cross Spectral Density Methods for Measuring Structure Borne Power Flow on Beams and Pipes,” J. Sound Vib., 70, pp. 133–139.
Tanaka,  N., Synder,  S. D., Kikushima,  Y., and Kuroda,  M., 1994, “Vortex Structural Power Flow in a Thin Plate and the Influence on the Acoustic Field,” J. Acoust. Soc. Am., 96, pp. 1563–1574.
Pavic, G., 1990, “Energy Flow Induced by Structural Vibrations of Elastic Bodies,” Proc. of the Structural Intensity and Vibration Energy Flow; 3rd International Congress on Intensity, Techniques, pp. 21–28.

Figures

Grahic Jump Location
Photograph of the Ometron SLDV
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Data acquisition setup schematic
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Generalized force definitions
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Simply supported plate experimental setup
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Power-flow vector plot and velocity field at 79.0 Hz
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Net power flow crossing the control volume at 79.0 Hz
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Power-flow vector plot and velocity field at 311.0 Hz
Grahic Jump Location
Net power flow crossing the control volume at 311.0 Hz

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