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PONAŠANJE BRODA NA TALASIMA____________________________Pri tome je brod sa manjimsopstvenim periodom poniranjauvek u povoljnijem položaju...i graničnu liniju dostiže pri većimbrzinama...Primer, tri broda različitih brzina:L = 100 mT ζ (s) v o (kn) F Rλ rez L/λ rez RezonancijaBrod A 6 0 0 56,2 1,779 BezopasnaBrod B 6 15 0,246 132,6 0,754 OpasnaBrod C 6 30 0,492 198,1 0,504 OpasnaPREDAVANJA 2009. 127
PONAŠANJE BRODA NA TALASIMA____________________________Pomeranja, brzine i ubrzanja tačaka brodaDiferenciranjem brzina sledekomponente ubrzanjaaC = ζC ≈ ζG −xζ Cψa= ≈ z Cξ C Cψξv = v + vGC G Cv = r ⋅ψGCCxCzcosα C= sinα C=rrProjektovanjem na ose, sledivC ≈ ζG − rCψcosαC = ζG −xζ CψvC ≈ rCψ sinαC = zξ CψCCCa integracijom brzina,komponente pomeranjaζC = zC + ζG −xCψζ ′CξC = xC + zCψξ ′Pri tome važiCξ′ ζ′Zakoni poniranja i posrtanja broda suζ () t = ζ sin( ω t−γ) ,G G poψ() t = ψ cos( ω t−γ) ,opCψζCPREDAVANJA 2009. 128
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