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- W2131782015 abstract "Acoustic radiation characteristics are determined for a double shell structure, consisting of two circular cylindrical shells separated by, and immersed in, an acoustic medium. The fluid is assumed to be inviscid and compressible, and its motion is governed by the wave equation; the shell response is determined by using classical shell theory. The results indicate that in certain regions of the frequency ratio [Q(L/7r)J, the pressure in the outer fluid at the interface was somewhat greater for the double shell than for the single shell. However, the infinite response at the nonradiating frequency (Q = QA) was no longer present for the double shell. Furthermore, the introduction of structural damping did result in improved transmission loss properties for the double shell. Finally, it should be pointed out that greatly improved transmission loss properties can be expected for the double shell construction by choosing the appropriate combination of materials for the inner and outer shells. Nomenclature al,a2 = radius of the inner and outer shell, respectively c, cs = velocity of sound in the fluid and shell, respectively Es = elastic modulus of the shell g = coefficient of structural damping h = thickness of the shell L = nondimensional half-wavelength n =" @default.
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- W2131782015 date "1972-12-01" @default.
- W2131782015 modified "2023-09-25" @default.
- W2131782015 title "Acoustic radiation from two concentric cylindrical shells." @default.
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- W2131782015 doi "https://doi.org/10.2514/3.6696" @default.
- W2131782015 hasPublicationYear "1972" @default.
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