The impact of a moment excitation on the vibrational and acoustical response of a fluid-loaded system containing a structural discontinuity is examined. The response metric of interest is the acoustic power radiated from a semi-infinite plate supported in a rigid baffle. The impact of a moment excitation located near a locally reacting distributed-mass discontinuity as well as near the simple supports is examined. Numerical results show that the addition of a moment component can have a dramatic impact on the radiated acoustic power. Both the magnitude and phase of the moment relative to the force can impact the radiated acoustic power.
The Impact of Moments Near Discontinuities in Structural-Acoustic Systems
Contributed by the Technical Committee on Vibration and Sound for publication in the JOURNAL OF VIBRATION AND ACOUSTICS. Manuscript received April 2001; revised October 2002. Associate Editor: R. Ohayon.
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Shepard, , W. S. (April 1, 2003). "The Impact of Moments Near Discontinuities in Structural-Acoustic Systems ." ASME. J. Vib. Acoust. April 2003; 125(2): 137–144. https://doi.org/10.1115/1.1553470
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