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PONAŠANJE BRODA NA TALASIMA____________________________Pa je i vertikalno kretanja (poniranje)proizvoljne tačke C harmonijskafunkcija...ζ = z + ζ sin( ω t−γ)C C C op Cgde se za amplitudu i fazni pomerajdobijaγC≈ arctgζ ≈ ζ + x ψ2 2 2C G C oooζ sinγ + x ψ cosγG ζ C ooζ cosγ − x ψ sinγG ζ C ooζζa odgovarajuće prenosne funkcijeζ= =⋅⋅⋅≈ + C 2 2 2 2ζ ζ ψAToP P xCCkTP ζCζoCo2P= = ωpPζ, P ωCCpPζ = =ζCAATNa osnovun poznatih prenosnih funkcijaponiranja i posrtanja broda, moguće je...TζCVertikalna brzina i ubrzanje su ζ = ω ζ cos( ω t −γ)C p C p Co 2ζ =−ω ζ sin( ω t −γ)C p C p CoPrimer...PREDAVANJA 2009. 129
PONAŠANJE BRODA NA TALASIMA____________________________Za analizu uslova pod kojim talasi zalivajupalubu, ili uslova pod kojim pojedine tačkebroda izranjaju (izleću) iz vode...neophodno je odrediti vertikalnukoordinatu proizvoljne tačke broda uodnosu na slobodnu površinu vode, ζ rel ...Važiζ = ζ () t −ζ() tCrelC Tpri čemu jeζ () t ≈ ζ + A sin( ω t+k x )T VL T p T CPREDAVANJA 2009. 130
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