The present study explores both structural and controller design to attenuate vibration in large membrane space structures, especially due to low-frequency harmonic excitations. It is very difficult for membrane structures to suppress the low-frequency vibration induced by flexible support structures, because a lightly prestressed membrane has extremely low mode frequencies and little damping effect. The present study proposes the use of weblike perimeter cables around a membrane, and the application of simple and lightweight active controllers only along the web cables in order to isolate the membrane from vibration. This strategy successfully reduces the membrane vibration when the web-cable configuration is appropriately tailored. Both linear and nonlinear finite-element analyses exhibit a clear tradeoff between structural mass and control efficiency.
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e-mail: hiraku.sakamoto@colorado.edu
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December 2006
Technical Papers
Localized Vibration Isolation Strategy for Low-Frequency Excitations in Membrane Space Structures
Hiraku Sakamoto,
Hiraku Sakamoto
Center for Aerospace Structures, Department of Aerospace Engineering Sciences,
e-mail: hiraku.sakamoto@colorado.edu
University of Colorado
, Boulder, CO 80309-0429
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K. C. Park
K. C. Park
Center for Aerospace Structures, Department of Aerospace Engineering Sciences,
University of Colorado
, Boulder, CO 80309-0429
Search for other works by this author on:
Hiraku Sakamoto
Center for Aerospace Structures, Department of Aerospace Engineering Sciences,
University of Colorado
, Boulder, CO 80309-0429e-mail: hiraku.sakamoto@colorado.edu
K. C. Park
Center for Aerospace Structures, Department of Aerospace Engineering Sciences,
University of Colorado
, Boulder, CO 80309-0429J. Vib. Acoust. Dec 2006, 128(6): 790-797 (8 pages)
Published Online: April 7, 2006
Article history
Received:
November 11, 2005
Revised:
April 7, 2006
Citation
Sakamoto, H., and Park, K. C. (April 7, 2006). "Localized Vibration Isolation Strategy for Low-Frequency Excitations in Membrane Space Structures." ASME. J. Vib. Acoust. December 2006; 128(6): 790–797. https://doi.org/10.1115/1.2203341
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