Effects of combined boundaries on input power flow characteristics of cylindrical shells

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (11) : 194-202.

CHEN Luyun, GUO Yongjin

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Abstract

Here, vibro-acoustic problems of cylindrical shell structures with combined acoustic boundaries in a flow field were investigated. Aiming at the vibro-acoustic problem of a cylindrical shell structure in a controlled spatial domain where there exist simultaneously a free liquid surface and rigid wall ones, the double reflection method combined with the principle of the mirror image method was used to derive the governing equation of motion for the cylindrical shell structure with controlled sound boundaries. Finally, the forced vibration of a cylindrical shell structure in a quarter space was taken as an example to calculate input power flow characteristics of the cylindrical shell structure. The effects of different acoustic boundaries’ characteristics, frequencies and locations of the shell structure on its input power flow were compared.

Key words

Cylindrical Shells / Input Power Flow / Quarter Space / Double Reflection Method / Image Method

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CHEN Luyun, GUO Yongjin. Effects of combined boundaries on input power flow characteristics of cylindrical shells[J]. Journal of Vibration and Shock, 2019, 38(11): 194-202

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