Experimental snap-through boundaries for acoustically excited,thermally buckled plates |
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Authors: | K. D. Murphy L. N. Virgin S. A. Rizzi |
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Affiliation: | (1) Department of Engineering Mechanics, University of Nebraska, 68588-0347 Lincoln, NE;(2) Department of Mechanical Engineering, Duke University, 27708-0300 Darham, NC;(3) NASA Langley Research Center, Structural Acoustics Branch, 23681-0001 Hampton, VA |
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Abstract: | This paper presents some recent experimental results on the dynamic snap-through behavior of a clamped, rectangular plate subject to thermal loading and intense acoustic excitation. The likelihood of snap-through oscillations is characterized in terms of boundaries separating regions of snap-through and no snap-through in the parameter space. Two scenarios are considered. First, using tonal inputs, the regions of snap-through are mapped in the sound pressure level—input frequency domain ((SPL, ) plane). Second, random acoustic inputs are used, and the effect of varying the overall sound pressure level and frequency bandwidth are investigated ((SPL,) plane). Several nonlinear characteristics are evident and discussed. |
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