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TECHNICAL PAPERS

Investigation of the Sound Transmission into an Advanced Grid-Stiffened Structure

[+] Author and Article Information
Jeffrey S. Vipperman, Deyu Li, Ilya Avdeev

Department of Mechanical Engineering, University of Pittsburgh, Pittsburgh, PA 15261

Steven A. Lane

Air Force Research Laboratory, Space Vehicles Directorate, Kirtland AFB, NM 87117

J. Vib. Acoust 125(3), 257-266 (Jun 18, 2003) (10 pages) doi:10.1115/1.1569511 History: Received February 01, 2002; Revised November 01, 2002; Online June 18, 2003
Copyright © 2003 by ASME
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References

Steven,  Huybrechts, and Tsai,  Stephen W., 1996, “Analysis and Behavior of Grid Structures,” Comp. Sci. Technol. 56(9), pp. 1001–1015.
George,  Tommy J., Herman Shen,  M. H., Huybrechts,  Steven M., Meink,  Troy E., and Wegner,  Peter M., 2001, “Optimal Design of Composite Chambercore Structures,” Compos. Struct., 52(3–4), pp. 277–286, May–June.
Griffin,  Steven, Denoyer,  Keith K., and Das,  Alok, 1999, “Passive Vibroacoustic Isolation for Payload Containers,” J. Intell. Mater. Syst. Struct., 10(0083-05), pp. 83–87.
Griffin,  Steven, Hansen,  Collin, and Cazzolato,  Ben, 1999, “Feasibility of Feedback Control of Transmitted Sound into a Launch Vehicle Fairing Using Structural Sensing and Proof Mass Actuators,” AIAA 99(1529), pp. 2592–2602.
Griffin,  Steven, Hansen,  Collin, and Cazzolato,  Ben, 1999, “Feedback Control of Structurally Radiated Sound into Enclosed Spaces Using Structural Sensing,” JASA, 106(5), pp. 2621–2628.
Griffin, Steven, Denoyer, Keith K., and Sciuli, Dino, 1998, “Hybrid Structural/Acoustic Control of a Sub-Scale Payload Fairing,” SPIE Conference on Smart Structures and Integrated Systems, Vol. 3329 of 0277-786X, pp. 237–243.
Griffin, Steven, and Denoyer, Keith K., 1998, “Experimental Sensor and Actuator Location Procedure for Control of Dynamically Complex Smart Structures,” SPIE Conference on Smart Structures and Integrated Systems, Vol. 3329 of 0277-786X, pp. 717–723.
Lane,  Steven A., Kemp,  J. D., Griffin,  Stevenand Clark,  R. L., 2001, “Active Acoustic Control of a Rocket Fairing Using Spatially Weighted Transducer Arrays,” AIAA J., 38(1), 112–119.
Neple, Pascale, el Hafidi, Ali, and Lesueur, Claude, 2001, “On Sound Transmission Through a Truncated Isotropic Conical Shell: Experimental and Preliminary Numerical Results,” Internoise 2001, The Hague, The Netherlands, August 27–30.
Vipperman, Jeffrey S., Li, Deyu, Avdeev, Ilya, and Lane, Steven A., 2001, “Characterization and Control of Sound Radiation in a Complex Fairing Structure,” Internoise 2001, The Hague, The Netherlands, August 27–30.
Denoyer, Keith K., Griffin, Steven, and Das, Alok, 1998, “Passive Vibroacoustic Isolation for Reusable Launch Vehicle Payload Containers,” AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics & Materials Conference, AIAA-98-1977, pp. 2248–2256, Longbeach, CA, April 20–23.
Fahy, F., 1985, Sound and Structural Vibration, Academic Press, Inc., New York.
White,  Pritchard H., 1966, “Sound Transmission Through a Finite, Closed Cylindrical Shell,” JASA, 50(5), pp. 1124–1130.
Manning,  J. E., and Maidanik,  G., 1964, “Radiation Properties of Cylindrical Shells,” JASA, 36(9), pp. 1691–1698.
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Koval,  L. R., 1976, “On Sound Transmission into a Thin Cylindrical Shell Under Flight Conditions,” JSV, 48 , pp. 265–275.
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Blake, William K., 1986, Mechanics of Flow-Induced Sound and Vibration, Vol. 1, General Concepts and Elementary Sources, Academic Press, Inc., London.
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ANSYS, Inc., 2001, Canonsburg, PA 15317.

Figures

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Typical transmission loss spectrum for a flat panel
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Picture of a mock-scale AGS fairing test bed
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Cylindrical coordinate system and dimensions that describe the structure
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Details of FEA model components
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First few structural mode shapes from FEA results
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Representative FRF of structure
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First few acoustic mode shapes from FEA results
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Representative FRF between speaker and cavity microphone
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Noise transmission measurement setup
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Measured noise reduction spectrum showing acoustic and structural modes
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Measured noise reduction spectrum (NRS) showing various regions of transmission loss

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