Acoustic radiation from a plate thickness discontinuity of a fluid-loaded plate

Pierucci, Mauro

doi:10.1109/icassp.1977.1170176

Cited by 1 publication

(3 citation statements)

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“…Each sub-figure in Fig. 14 includes three directivity curves corresponding to three plate configurations: (1) Without the patch, (2) with the patch at x p ¼ ÀL /2, and (3) with the patch at x p ¼ L=2. The directivities are described in the dB scales and calculated by 20 log 10 ðjpðr; hÞj=ðF o = ffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffi ð2p rh b Þ p ÞÞ.…”

Section: Far-field Directivitymentioning

confidence: 99%

“…7 The dynamics of both the plate and patch are modeled by a classical thin plate theory for simplicity of analysis and a consistent comparison with the previous results. [1][2][3][4][7][8][9] For a more accurate description of the plate response in the higher frequency region, Mindlin plate theory is recommended. 10 The radiated sound power of the patched plate is examined to estimate the significance of the effects of the patch on the sound radiation and to raise questions and discussions about the mechanisms involved in the variations of sound power due to the patch.…”

Section: Introductionmentioning

confidence: 99%

“…Much effort has been devoted to the study of the sound radiation of a fluidloaded infinite plate with a line discontinuity. [1][2][3][4] In particular, Lyon 1 computed the sound radiation of subsonic structural waves scattered by a beam attached to an infinite plate. He demonstrated that the beam scatters the structural waves and that the scattered waves are responsible for the radiated sound.…”

Section: Introductionmentioning

confidence: 99%

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Sound radiation from a fluid-loaded infinite plate with a patch

Zhang

2013

The Journal of the Acoustical Society of America

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This paper focuses on the solution to the vibro-acoustic response of a line-driven fluid-loaded plate with an elastic patch acting as a distributed inhomogeneity. The patch affects the plate's sound radiation by adding extra loading to the driving force and by scattering structural waves. When the driving force is located beneath the patch, the extra loading reduces the plate's supersonic velocity response and sound radiation. At some frequencies, however, the constructive superposition of scattered structural waves and near-field waves by the driving force outweighs the effect of patch loading and results in an increased sound radiation power. When the patch is located away from the driving force, wave scattering phenomena dominates the plate vibration and subsequent sound radiation. By examining the effect of the length and location of the patch on the sound power, it is possible to relate the changes in the sound power to the changes in supersonic velocity spectrum and velocity distribution contributed by the trapped modes in the patched area and interference between the scattered waves by the patch and the near- and far-field structural waves directly generated by the driving force.

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Section: Far-field Directivitymentioning

confidence: 99%