On operation capabilities analysis of a 100000 tdw tanker by seakeeping criteria
Abstract
The operation capabilities of a maritime ship have to be assessed during the design, including the seakeeping criteria. In this study a 100000 tdw tanker is considered, with two loading conditions, cargo and ballast. The numerical analyses are developed with our own software DYN, module OSC, based on a linear hydrodynamic strip theory. The main oscillation components, heave, pitch and roll, are considered. The analysis includes an extended parametric study for the tanker speed up to 15 knots, different vertical positions of the gravity centre, a heading angle full range and irregular waves significant height up to 12m. Also the seakeeping limits have two sets of criteria. The results are pointing out the operation limits of the tanker on combined navigation parameters in irregular waves, by motions and acceleration short term seakeeping criteria.
References
[2]. Bidoae, I., Ionas, O., "Naval architecture complements", Porto-Franco, Galati, 1998.
[3]. Burlacu, E., Domnisoru, L., Obreja, D., "Seakeeping prediction of a survey vessel operating in the Caspian Sea", The 37th International Conference on Offshore Mechanics and Arctic Engineering, ASME, Paper No. OMAE 2018-77126, Madrid, 2018.
[4]. BV, “Rules”, Bureau Veritas, Paris, 2019.
[5]. DNV-GL, “Rules”, Det Norske Vertias – Germanischer Lloyd, 2019.
[6]. Domnisoru, L.,"Ship dynamics. Oscillations and vibrations”, Technical Publishing House, Bucharest 2001.
[7]. Domnisoru, L., Rubanenco, I., Obreja, D., “The experimental and numerical linear and non-linear analyses of oscillations response, based on a scaled ITTC type ship model”, The Annals of “Dunarea de Jos” University of Galati, Fascicle XI Shipbuilding, pp.75-84, 2013.
[8]. Dumitru, D.,“Compendium of ships forms”, “Dunarea de Jos” University Foundation Publishing House, Galati, 2014.
[9]. Gasparotti, C., Domnisoru, L., Obreja, D., “The oscillations analysis in head waves of a tractor-tug model by experimental and numerical methods”, 16th SGEM GeoConference on Water Resources,(3), pp.877-884, Albena, 2016.
[10]. ITTC, “Recommended procedures and guidelines. Seakeeping”, The International Towing Tank Conference, 2011.
[11]. Obreja, D., “Ship theory. Concepts and methods for the navigation performances analysis”, E.D.P. Publishing House, Bucha-rest, 2005.
[12]. Obreja, D., Nabergoj, R., Crudu, L., Domnisoru, L., “Seakeeping performance of a Mediterranean fishing vessel”, IMAM, Maritime Transportation and Harvesting of Sea Resources, pp.483-491, Lisbon, 2017.
[13]. Solas, “International convention for the safety of life at sea”, IMO, 2014.
[14]. Voitkunski, Y.I., “Ship theory handbook”, Sudostroenie, Sankt Petersburg, 1985.
