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FINITE ELEMENT–BOUNDARY ELEMENT BASED VIBROACOUSTIC MODEL FOR NONHOMOGENEOUS TURBULENT BOUNDARY LAYER EXCITED COMPOSITE PANELS INVOLVING THE CHOLESKY DECOMPOSITION

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Journal of Applied Mechanics and Technical Physics Aims and scope

Abstract

An original numerical framework is developed in the present research work in order to estimate the free field sound radiation from baffled structural panels subjected to nonhomogeneous turbulent boundary layer flow-induced excitation. A sequence of semi-analytical methods is used to estimate the nonhomogeneous turbulent boundary layer wall pressure spectrum, which is decomposed using the Cholesky technique to obtain the random wall pressure in the frequency domain. Structural panels are modeled using the finite element technique, and a coupled finite element-boundary element modeling technique is developed to estimate the sound power level radiated into the free field. Results are obtained for laminated composite structural panels with various fiber orientations.

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Authors and Affiliations

  1. Jadavpur University, 700032, Kolkata, West Bengal, India

    B. R. Adhikary & P. Bhattacharya

  2. National Institute of Technology Silchar, 788010, Silchar, Assam, India

    A. Sahu

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  1. B. R. Adhikary
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  2. A. Sahu
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  3. P. Bhattacharya
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Correspondence to B. R. Adhikary.

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Translated from Prikladnaya Mekhanika i Tekhnicheskaya Fizika, 2023, Vol. 64, No. 6, pp. 210-225. https://doi.org/10.15372/PMTF20230624.

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Adhikary, B.R., Sahu, A. & Bhattacharya, P. FINITE ELEMENT–BOUNDARY ELEMENT BASED VIBROACOUSTIC MODEL FOR NONHOMOGENEOUS TURBULENT BOUNDARY LAYER EXCITED COMPOSITE PANELS INVOLVING THE CHOLESKY DECOMPOSITION. J Appl Mech Tech Phy 64, 1128–1140 (2023). https://doi.org/10.1134/S002189442306024X

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