Naslov
Influence of the approximated mass characteristics of a ship on the added resistance in waves

Autori
Martić, Ivana ; Degiuli, Nastia ; Komazec, Petra ; Farkas, Andrea

Vrsta, podvrsta i kategorija rada
Poglavlja u knjigama, znanstveni

Knjiga
Maritime Transportation and Harvesting of Sea Resources

Urednik/ci
Guedes Soares, Carlos ; Teixeira, Ângelo Palos

Izdavač
CRC Press ; A.A. Balkema Publishers

Grad
London : Delhi

Godina
2017

Raspon stranica
439-446

ISBN
978-0-8153-7993-5

Ključne riječi
added resistance, mass characteristics, potential flow

Sažetak
Added resistance in waves is one of the main causes of the involuntary speed reduction of a ship. Total resistance force of the ship sailing at actual seaway should be determined instead of considering the calm water resistance and taking the Sea margin into account. The exact ship mass characteristics, i.e. position of the centre of gravity and gyration radii, are often unknown especially in the preliminary design phase of a ship. In order to calculate the ship response and loads acting on the ship hull in waves, the mass characteristics have to be approximated with sufficient accuracy. In this paper, the influence of the approximate determination of the ship’s centre of gravity and gyration radii on the added resistance in waves is investigated for KCS and S175 benchmark container ships and KVLCC2 ship which has a hull form of a typical large tanker. Added resistance in waves is calculated using 3D panel code based on the potential flow theory for various incoming wave frequencies. Ship mass characteristics are approximated and added resistance is calculated for full load and ballast condition considering that ship spends 40-50% of its total voyage time in the ballast condition. The obtained results for the added resistance are compared with the available experimental data from the literature.

Izvorni jezik
Engleski

Znanstvena područja
Brodogradnja

POVEZANOST RADA