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• W2079187563 abstract "A simplified model is used to obtain a description of the way in which radiation damping limits the resonant oscillations of a cantilever or strut. It is shown that radiation damping is equivalent, in the low frequency limit, to a fictitious internal dissipation, with loss factor ηrad = (π2)[m′(m+m′)](k0a)2, where 2a is the strut thickness, m its mass per unit length and m′ the virtual fluid mass per unit length. Typical values of ηrad appear to be slightly higher than internal loss factors, showing that the resonant amplitude is limited only by radiation loss, even for thin struts for which k0a ⪡ 1. When k0a ⪢ 1 it is found that ηrad is much larger than any internal loss factor, and therefore that high frequency resonances are heavily damped, regardless of internal dissipation. The pressure field near the strut is also examined, and in the case k0a⪡1 is found at resonance to exceed the driving pressure field by the large factor (k0a)−2. The far field pressure at resonance may, under some conditions, also greatly exceed the off-resonance scattered field, and this great scattering efficiency of a thin strut at resonance is demonstrated by detailed examination of a particular case." @default.
• W2079187563 created "2016-06-24" @default.
• W2079187563 creator A5061847661 @default.
• W2079187563 date "1983-04-01" @default.
• W2079187563 modified "2023-09-25" @default.
• W2079187563 title "Resonant oscillations of fluid-loaded struts" @default.
• W2079187563 cites W2067542303 @default.
• W2079187563 doi "https://doi.org/10.1016/0022-460x(83)90471-6" @default.
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