Estimation Local Strength of Bow Structure for High Tensile Steel Yacht Based on Optimum Design

Abstract:

The optimum design for bow structure of high tensile steel yacht belongs to the nonlinear constrained optimization problem. The determination of scantlings for the bow structure is a very important matter out of whole structural design process of a yacht. The optimum design results are produced with the use of Real-coded Micro-Genetic Algorithm including evaluation LR small craft guideline, so that they can satisfy the allowable stress criterion. In this study, the minimum weight design of bow structure on the HTS yacht was carried out based on the finite element analysis. An analysis model is a bow structure of HTS yacht with structural scantling derived from the minimum weight optimization. The weight of bow structure and the main dimensions of structural members are chosen as an objective function and design variable, respectively. Optimization results were compared with a pre-existing design. From the FE analysis results, bow structure with high tensile steel (AH40) designed by using RμGA has a volume efficiency of 19% than the design of the actual mild yacht.

• Periodical: Key Engineering Materials (Volumes 326-328)
• Pages: 1463-1466
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.326-328.1463
• Online since: December 2006
• Authors: Joo Shin Park, Yun Young Kim, Tetsuya Yao
• Keywords: Buckling, Finite Element Analysis (FEA), High Tensile Steel, Local Strength, Minimum Weight Design, Real-Coded Micro-Genetic Algorithm

References

[1] Y. Kim, S.C. Shin and J.Y. Ko, Optimum design for bow structure of high tensile steel yacht, The International Conference on Experimental Mechanics, Jeju, Korea, in press, (2006).

[2] Structural design of high speed vessels, 14th International Ship and Offshore Structures Congress, Nagasaki, JAPAN, (2000).

[3] D. Boote, M. Figari and A. Sculati. Ultimate strength assessment of fast mono hull vessels. Proc. 5th International Conference on Fast Sea Transportation (FAST 99'), Seattle, USA, (1999).

[4] Rules and Regulations for the Classification of Special Service Craft, Part 6, Hull Construction in Steel, Lloyd's Register, July (2003).