丁 勲is papeT repo 貞 s on d 》 n旧 m } c behavior of various sti飩 11cd cylilldrical shell under inten 】 al pressure alld extenlal pressure . Free vibration charactehsUc is very protitable on unde [ standing 由 e stnIci し 邑 re of dynamic bchavior , On stud } ・ ing a stif 海 ned cy ] indrical shcl1 , there were ve τ y f ヒw studies oll the interactioll between the reinforcing effect and free vib 田 tlon charaGteristic . Thus in thls study we illvcstigated a 童 ee vib 阻 tion characteristic of vanous stin

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... cd cylindrica 】sh ¢ ll urider iltenral pressure and extcrnal pressure by fillite elemellt method analysisand experhnent . There restllts ale colllpared 、 酒 山 thc exp 卑 riment and Uleo 【 ies ofother researchers .