11. Optimum Design of Offshore Platforms Minimizing Expected Total Cost
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概要
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In this study, the optimum design procedure is proposed for offshore platforms to minimize the expected total cost which is composed of structural cost and expected maintenance cost. The expected total cost could be interpreted as a reasonable utility function for the multi-objective optimization problem such as maximum safety and minimum cost. The design variables are the geometrical dimensions of the structure while its configuration and the materials to be used are given. Partial failure due to formation of plastic hinges and/or fatigue cracks of the critical sections during design life is considered. The design is performed for the platforms subjected to wave loads. In addition, the effect of periodic inspection is investigated. The failure probability corresponding to the optimum solution is used as an index for specifying the allowable failure probability in probabilistic optimum design problems. Numerical examples for a jacket-type offshore platform are provided to illustrate the applicability of the proposed method.
- 社団法人日本船舶海洋工学会の論文
著者
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Murotsu Yoshisada
College Of Engineering University Of Osaka Prefeciture
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Kishi Mitsuo
College Of Engineering University Of Osaka Prefeciture
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TAGUCHI Katashi
College of Engineering, University of Osaka Prefeciture
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Taguchi Katashi
College Of Engineering University Of Osaka Prefeciture
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