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황선복(Seon-Bok Hwang),박준석(Jun-Seok Park),이경도(Kyoung-Do Lee),박선환(Seon-Hwan Park) 대한조선학회 2011 대한조선학회 학술대회자료집 Vol.2011 No.11
The longitudinal structural members in way of upper deck of container carrier consist of very thick plates with high tensile strength and high grade, which are of high cost. And also these are the most effective longitudinal strength members. Therefore it is necessary to carefully design the concerned part to minimize the cost. The purpose of this study is to find optimum design of the concerned part in the aspect of cost. ES(Evolution Strategy) technology is applied in this study, and the method to get practically the result is invented. The minimum cost design considering steel materials and/or assembling man power is carried out for existing ships and the effect of the variation of thickness difference, material and labor cost on the result of optimum design is investigated.
황선복(Seon-Bok Hwang),신상훈(Sang-Hoon Shin),박준석(Jun-Seok Park) 대한조선학회 2011 대한조선학회 학술대회자료집 Vol.2011 No.6
The purpose of this study is to economize the cargo tank structure for the type 'A' LPG Carrier, applying optimization methods to the structural design. The structure of the cargo tank comprises of plates, stiffeners, webs and stringers. For the optimum scantling of plates and stiffeners, ES(Evolution Strategy) is carried out in consideration of both material and labor cost. For the optimum scantling of webs and stringers, the minimum weight design is carried out using the local optimization module of a commercial FEM software.