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Optimization of ship inner shell to improve the safety of seagoing transport ship
- Source :
- International Journal of Naval Architecture and Ocean Engineering, Vol 5, Iss 3, Pp 454-467 (2013)
- Publication Year :
- 2013
- Publisher :
- Elsevier BV, 2013.
-
Abstract
- A practical Ship Inner Shell Optimization Method (SISOM), the purpose of which is to improve the safety of the seagoing transport ship by decreasing the maximum Still Water Bending Moment (SWBM) of the hull girder under all typical loading conditions, is presented in this paper. The objective of SISOM is to make the maximum SWBM minimum, and the section areas of the inner shell are taken as optimization variables. The main requirements of the ship performances, such as cargo hold capacity, propeller and rudder immersion, bridge visibility, damage stability and prevention of pollution etc., are taken as constraints. The penalty function method is used in SISOM to change the above nonlinear constraint problem into an unconstrained one, which is then solved by applying the steepest descent method. After optimization, the optimal section area distribution of the inner shell is obtained, and the shape of inner shell is adjusted according to the optimal section area. SISOM is applied to a product oil tanker and a bulk carrier, and the maximum SWBM of the two ships is significantly decreased by changing the shape of inner shell plate slightly. The two examples prove that SISOM is highly efficient and valuable to engineering practice.
- Subjects :
- Engineering
business.industry
lcsh:Ocean engineering
Propeller
lcsh:Naval architecture. Shipbuilding. Marine engineering
Ocean Engineering
Rudder
Structural engineering
Bridge (nautical)
lcsh:VM1-989
Control and Systems Engineering
Hull
Girder
lcsh:TC1501-1800
Method of steepest descent
Bending moment
Penalty method
Still water bending moment
Ship
business
Inner shell plate
Optimization design
Marine engineering
Subjects
Details
- ISSN :
- 20926782
- Volume :
- 5
- Issue :
- 3
- Database :
- OpenAIRE
- Journal :
- International Journal of Naval Architecture and Ocean Engineering
- Accession number :
- edsair.doi.dedup.....963e1e9aa38e3f5c4504a735ec41a8a7
- Full Text :
- https://doi.org/10.2478/ijnaoe-2013-0145