Naslov
Dynamic instabilities in following seas caused by parametric rolling of C11 class containership

Autori
Turk, Anton ; Prpić-Oršić, Jasna ; Riberio e Silva, Sergio ; Guedes Soares, Carlos

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of the 14th International Congress of the International Maritime Association of the Mediterranean (IMAM)- Sustainable Maritime Transportation and Exploitation of Sea Resorces / Rizzuto, E. & Guedes Soares, C. - London : Delhi : Taylor & Francis, 2011, 125-135

ISBN
978-0-415-62081-9

Skup
International Congress of the International Maritime Association of the Mediterranean (IMAM)- Sustainable Maritime Transportation and Exploitation of Sea Resorces

Mjesto i datum
Genova, Italija, 13.09.2011. - 16.09.2011

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
dynamic stability; parametric rolling; seakeeping

Sažetak
Parametric roll resonance is known as one of dangerous modes of ship motions in waves. This resonance occurs as a result of roll restoring energy variations in astern or head seas. Post-Panamax container ships seem to be particularly susceptible to parametric rolling because the vessels tend to feature wide beam and large bow flares in order to carry more containers on deck while at the same time minimizing the resistance and improve propeller performance with the streamlined underwater hull. This paper focuses on the parametric resonance observed in following seas. A 6 degree-of-freedom model has been used to explain the parametric roll resonance of the ship taking into account coupling between roll and vertical motions. Parametric rolling resonance in following waves was also investigated experimentally. Several experiments using a scale model of a post-Panamax containership were carried out in regular following waves at the CEHIPAR basin in Spain. In these experiments the wavelength, the wave height, the model speed and the encounter angle were widely varied to clarify overall property of parametric rolling resonance in following waves. As a result, conditions in which the parametric rolling resonance is likely to occur were determined. Also outlined in the paper are recommendations for additional research needed to better understand the influence of vessel design and operational considerations on the propensity of post-Panamax containerships towards parametric roll-ing.

Izvorni jezik
Engleski

Znanstvena područja
Brodogradnja

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