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PONAŠANJE BRODA NA TALASIMA____________________________Statistički gledano, mirno more (visina talasa 0-1 m,svetski prosek ) 30% vremenaNa severnom Atlantiku 20%...U preostalih 70-80% slučajeva, more je uzburkano...Većinu vremena brod se ljulja na talasima...Nekoliko posledica ljuljanja• Neprijatno za putnike i posadu,• Otežan rad posade,• Otežan rad brodskih uređaja,• Otežano izvršenje zadatka (tegljenje, spasavanje,gađanje, sletanje helikoptera, utovar/istovar...),• Smanjenje brzine plovidbe (namerno i spontano),o),• Dodatne dinamičke sile (dovode do opterećenjakonstrukcije, pomeranja tereta...),• Sleming, zalivanje palube, izletanje propelera...itd...Sve posledice ljuljanja su negativne...Jače oluje, dovode do jačeg ljuljanja...“otežan rad” postaje “onemogućen”...javlja se opasnost od brodoloma –prevrtanja broda, pucanja konstrukcijeitd.Većina brodskih nesreća desilase na uzburkanom moru...Predmet: kako smanjiti ljuljanje injegove posledice....Treba proučiti ljuljanje, predvidetiposledice i (koliko je to moguće) ć poboljšati pomorstvenost broda...PREDAVANJA 2009. 5
PONAŠANJE BRODA NA TALASIMA____________________________Predmet je težak...Proboj je načinjen 1950-70, prelaskomna realne (neregularne) talase, irazvojem tzv. “strip teorije”...Proračun oaču pomorstvenosti o ost je prvoprimenjivan u ratnoj brodogradnji,ali se danas proširio i na komercijalnebrodovei postao jedan od osnovnih brodskihproračuna...Ljuljanje deluje zastrašujuće ne samo zaljude na brodu, već i za nas koji treba da gaproučavamo...Ali, takav je put po kome od pamtivekaplove brodovi...Istorijski, sa proučavanjem ljuljanja broda jezapočeto krajem 19. veka (Frud, Krilov),stiglo se do tzv. regularnih (sinusnih) talasa, izapalo u ćorsokak...Proračun je obiman, i sprovodi se(komercijalnim) programima izpomorstvenosti...Treba znati koristiti programe...Ali, krenimo redom...PREDAVANJA 2009. 6
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