Akademik Veri Yönetim Sistemi
Tezin Türü: Yüksek Lisans
Tezin Yürütüldüğü Kurum: Yıldız Teknik Üniversitesi, Fen Bilimleri Enstitüsü, Türkiye
Tezin Onay Tarihi: 2023
Tezin Dili: İngilizce
Öğrenci: SERDAR EKEN
Danışman: Yasemin Arıkan Özden
Özet:
In this study, the variation of the GM (Metacentric Height) and BG (Vertical Distance
between the Center of Buoyancy and the Center of Gravity of the Submerged Submarine)
values for submarines of different displacement is investigated using a generic submarine
geometry. For this the intact and damaged stability characteristics of the generic
submarine BB2 Joubert are carried out in surfaced and submerged conditions. The BB2
Joubert submarine geometry is a generic submarine model geometry which is extensively
used in submarine hydrodynamic studies. In the literature there are various experimental
and computational studies on manoeuvring, resistance, and propulsion where generic
submarine geometries are used. However submarine stability studies are very limited in
the open literature and there is no examples for the application of submarine intact and
damaged stability rules on a submarine. So, the aim of this study is to generate a sample
tank arrangement plan for a generic submarine and to conduct the stability analysis
according to the DNV Submarine Rules. The original BB2 Joubert submarine is 70.13 m.
long and has a depth of 10.6 m. in full scale. In the open literature a simple general
arrangement plan is proposed for the submarine. At the beginning of the study the
pressure hull design, tank arrangement and tank capacities are determined according to
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the suggested general arrangement plan of the full scale submarine. Weight estimation is
made according to the submerged condition of the submarine to reach the neutral stability
condition. The main ballast tank capacities are designed so that the %10 reserve buoyancy
limit is reached. The vertical center of gravity is determined in the submerged condition
as a limit of the vertical centre of gravity (KG) value. The stability analysis is made
according to the Stability Rules of DNV (Det Norske Veritas) for Submarines Edition
January 2018 with the use of a commercial stability software AVEVA Marine. Eight
different loading conditions are investigated in the intact and damaged stability analysis
for one water density. Four loading conditions are defined for the surfaced condition and
four loading conditions are defined for the submerged condition. The righting lever and
heeling levers due to free liquid surface, turning circle and wind are defined and the
required remaining righting levers are examined. After the examination of the full scale
submarine three other submarine geometries are created, namely 30 m., 48 m. and 100 m.
Stability analysis for the other scaled geometries are conducted in the same methodology
as for the full scale submarine for the same tank arrangements. Since DNV rules suggest
different GM and BG values for submarines of different displacement, a formula to
calculate the KG value in dependence of the submarine displacement is suggested for the
use in the early design phase of a submarine.