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PONAŠANJE BRODA NA TALASIMA____________________________Za proračun reakcija na neregularnim talasima, potrebne sunam prenosne funkcije...F′= = =z 2ωζ ζAToPF mPzampPFyo4 2 2 2 2PF = = m⋅ ωypP + g P+ 2gωpP Pγ −γATsin ( )η ϕ η ϕ ϕ η22S = P ( ω ) ⋅ S ( ω ) S = P ( ω ) ⋅S( ω )F F p T pzzF F p T pIntegracijom spektara slede odgovarajuće srednjekvadratne vrednosti ovih veličina σ ο (F z ) , σ ο (F y ) ...Na primer, najverovatnija maksimalna reakcija u Ncikluisa jeF = 2σln Nmaxoyt oN = TyT = 2πσoσRazmotrićemo sada važan slučaj slobodno postavljenogtereta na palubu broda, odnosno uslovi pod kojima će doćido pomeranja – klizanja ili prevrtanja ovako postavljenogtereta...2U slučaju slobodnopostavljenog tereta mora bitizadovoljen uslovFz> 0jer bi se, u protivnom, teretodvojiti od palube.Takođe, mora biti zadovoljenuslovF < Fμy t zUkoliko ovaj uslov nijeispunjen, dolazi do klizanjatereta.Uslov odsustva klizanja je,na bočnim č talasima, oštriji– teret će pre proklizati,nego što će se odvojiti odpalube...PREDAVANJA 2009. 179
PONAŠANJE BRODA NA TALASIMA____________________________S obzirom naa − μ a + gϕ
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