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1
Reliability analysis of Residual longitudinal strength of damaged ships.

Huynh Van-Vu,Cho Sang-Rai 대한조선학회 2011 대한조선학회 학술대회자료집 Vol.2011 No.6
- 원문보기
In the present study, based on the value of residual longitudinal strength of damaged ships was predicted by the Smith's method, the reliability analysis has been carried out for both vertical and horizontal bending moments. The limit state function was derived based on the interaction equation. Four cases of still water bending moment and two Monte Carlo simulations which different samples have been performed. This study focused on Bulk Carrier and Double Hull VLCC in ISSC 2000.
2
Optimization of ship inner shell to improve the safety of seagoing transport ship

Yan-Yun YU,Yan LIN 대한조선학회 2013 International Journal of Naval Architecture and Oc Vol.5 No.3
- 원문보기 2
  DBpia
  
  KCI
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.
3
Optimization of ship inner shell to improve the safety of seagoing transport ship

Yu, Yan-Yun,Lin, Yan The Society of Naval Architects of Korea 2013 International Journal of Naval Architecture and Oc Vol.5 No.3
- 원문보기
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.