Time-domain analysis for vibration and sound radiation of submerged spherical shell excited by force-中国期刊网

摘要 Thevibrationandsoundradiationofasubmergedsphericalshellarestudiedinthetime-domainbyLaplacetransformmethod,whereaCWpulseforceactsattheapexoftheshell.Thenumericalresultsforthecaseoflongpulseshowthatthedifferentvibrationalmodesandtheresonantorbeatradiatedsoundareexcitedfordifferentcarrier-frequencies,butlitlesoundisra-diatedforsomevibrationalmodes.Forthecaseofshortpulsethewaveformsofthepulsebecomewidenedanddeformed,whenthepulsepropagatesbetweenapexesoftheshell.Then,theDoublyAsymptoticApproximations(DAA2)andKirchhoff‘sRetardedPotentialFormulate(KRPF)areusedtosolvethesameproblem.ItisshownthattheresultsofDAA2andKRPFmethodhaveagoodagreementwiththeresultsofLaplacetransformmethod.

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Time-domain analysis for vibration and sound radiation of submerged spherical shell excited by force

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Time-domain analysis for vibration and sound radiation of submerged spherical shell excited by force

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