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- W4366992835 abstract "In this research, the sound radiation efficiencies of multi-layer composite flat as well as curved structure under harmonic mechanical excitation in hygrothermal environment is numerically investigated using a coupled micromechanical finite element and boundary element scheme. The higher-order mid-plane kinematics including the stretching effect is equipped for the structural modeling and the Hamilton’s principle is utilized to evaluate the hygro-thermo-elastic natural frequencies alongside corresponding modes of the structures lying on an infinite rigid-baffle. An isoparametric Lagrangian element with zero order Hermitian interpolation function (ten degrees of freedom per node) is utilized for transforming the continuous structural equations into discrete counterparts. The effective composite material properties due to combined hygrothermal loading are considered via a micromechanical model. Then, an indirect boundary element method is employed to attain the structure-surrounding coupling and the sound radiation efficiencies are computed by solving the Helmholtz wave equation. The effectiveness of the model is established by converging it with the similar results available in the open literature for vibrational as well as sound radiation efficiencies and the results reveal the confirmation of the model accuracy. Upon solving diverse numerical illustrations, the sound radiation efficiency found to decrease with intensity of hygrothermal loads and the cross-ply spherical panels with less volume fraction of fiber depicted the least RE values over the entire frequency range considered." @default.
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- W4366992835 date "2023-01-01" @default.
- W4366992835 modified "2023-10-18" @default.
- W4366992835 title "Acoustic radiation efficiencies of laminated composite structure under mechanical excitation and hygrothermal loading: Numerical analysis" @default.
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- W4366992835 doi "https://doi.org/10.1016/j.matpr.2023.04.269" @default.
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