Acoustic Pressure Waves in Vibrating 3-D Laminated Beam-Plate Enclosures

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dc.contributor.authorOsheku, C.A.
dc.contributor.authorOlunloyo, V.O.
dc.contributor.authorDamisa, O.
dc.contributor.authorAkano, T.T.
dc.date.accessioned2019-10-07T11:37:49Z
dc.date.available2019-10-07T11:37:49Z
dc.date.issued2009
dc.descriptionStaff publicationsen_US
dc.description.abstractThe effect of structural vibration on the propagation of acoustic pressure waves through a cantilevered 3-D laminated beam-plate enclosure is investigated analytically. For this problem, a set of well-posed partial differential equations governing the vibroacoustic wave interaction phenomenon are formulated and matched for the various vibrating boundary surfaces. By employing integral transforms, a closed form analytical expression is computed suitable for vibroacoustic modeling, design analysis, and general aerospace defensive applications. The closed-form expression takes the form of a kernel of polynomials for acoustic pressure waves showing the influence of linear interface pressure variation across the axes of vibrating boundary surfaces. Simulated results demonstrate how the mode shapes and the associated natural frequencies can be easily computed. It is shown in this paper that acoustic pressure waves propagation are dynamically stable through laminated enclosures with progressive decrement in interfacial pressure distribution under the influence of high excitation frequencies irrespective of whether the induced flow is subsonic, sonic, supersonic, or hypersonic. Hence, in practice, dynamic stability of hypersonic aircrafts or jet airplanes can be further enhanced by replacing their noise transmission systems with laminated enclosures.en_US
dc.identifier.citationOsheku, C. A., Olunloyo, V. O., Damisa, O., & Akano, T. T. (2009). Acoustic Pressure Waves in Vibrating 3-D Laminated Beam-Plate Enclosures. Advances in Acoustics and Vibration, 2009.en_US
dc.identifier.urihttps://ir.unilag.edu.ng/handle/123456789/6276
dc.language.isoenen_US
dc.publisherAdvances in Acoustics and Vibration in Hindawi Publishing Corporationen_US
dc.subjectStructural vibrationen_US
dc.subjectAcoustic pressureen_US
dc.subjectDynamic stabilityen_US
dc.subjectVibroacousticsen_US
dc.subjectResearch Subject Categories::TECHNOLOGYen_US
dc.titleAcoustic Pressure Waves in Vibrating 3-D Laminated Beam-Plate Enclosuresen_US
dc.typeArticleen_US
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