International Journal of Naval Architecture and Ocean Engineering

The Society of Naval Architects of Korea (대한조선학회)
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Optimization of ship inner shell to improve the safety of seagoing transport ship

  • Yu, Yan-Yun (State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology) ;
  • Lin, Yan (State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology)
  • Published : 2013.09.30
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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.

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References

  1. Chen, J., Lin, Y., Huo, J.Z., Zhang, M.X. and Ji, Z.S., 2010. Optimization of ship's subdivision arrangement for offshore sequential ballast water exchange using a non-dominated sorting genetic algorithm. Ocean Engineering, 37(11-12), pp. 978-988. https://doi.org/10.1016/j.oceaneng.2010.03.012
  2. Cui, H. and Turan, O., 2010. Application of a new multi-agent Hybrid Co-evolution based Particle Swarm Optimization methodology in ship design. Computer Aided Design, 42(11), pp.1013-1027. https://doi.org/10.1016/j.cad.2009.07.005
  3. International Association of Classification Societies Ltd. (IACS), 2006. Common structural rules for double hull oil tankers (JTP). Section 8.1:1-20.
  4. International Association of Classification Societies Ltd. (IACS), 2006. Common structural rules for bulk carriers (JBP). Chapter 5, Section 1:1-10.
  5. International Maritime Organization (IMO), 2001. International convention for the Prevention of Pollution from ships (MARPOL 73/78) Annex I Regulation 19.
  6. International Maritime Organization (IMO), 2004. International convention for the Safety of Life at Sea (SOLAS) regulation II-1/3-6.
  7. Ivanov, L.D. and Wang, G., 2007. An approximate analytical method for calculation of the still water bending moments, shear forces and the ship's trim in the early design stages. Transactions of the Royal Institution of Naval Architects Part A: International Journal of Maritime Engineering, 149(3), pp.1-39.
  8. Lin, Y., Yang, Y., Ji, Z., Dai, Y. and Li, S., 1994. A neural network expert system for tanker subdivision. Ship Building of China, 3(126) pp.1-10.
  9. Olcer, A.I., Tuzcu, C. and Turan, O., 2006. An integrated multi-objective optimization and fuzzy multi-attributive group decision-making technique for subdivision arrangement of Ro-Ro vessels. Applied Soft Computing, 6(3), pp.221-243. https://doi.org/10.1016/j.asoc.2005.01.004
  10. Papanikolaou, A., Zaraphonitis, G., Boulougouris, E., Langbecker, U., Matho, S. and Sames, P., 2010. Multi-objective optimization of oil tanker design. Journal of Marine Science and Technology, 15(4), pp.359-373. https://doi.org/10.1007/s00773-010-0097-7
  11. Turkmen, B.S. and Turan, O., 2007. A new integrated multi-objective optimization algorithm and its application to ship design. Ships and Offshore Structures, 2(1), pp.21-37. https://doi.org/10.1533/saos.2006.0143
  12. Vasconcellos, J.M., 2010. Optimization procedure as decision tool for ship design. International Maritime Conference 2010. Sydney, Australia, 27-29 January 2010, pp.288-297.