Shape and size optimization of the double bottom structure of bulk carrier at the initial design stage with finite element analysis

Mitsuru Kitamura*, Tetsuya Uedera, Kunihiro Hamada, Akihiro Takezawa

*この研究の対応する著者

研究成果: Conference contribution

2 被引用数 (Scopus)

抄録

A structure optimization for the initial design stage of ship using FEM is considered in this paper. A general bulk carrier is selected as the target ship. Both the shape of the bottom structure and the size of plate thickness of the bulk carrier are taken as design variable simultaneously for a weight minimal optimization problem. Five geometric dimensions and thirty-one plate thicknesses are taken as the design variables for the shape and the size of the bottom structure, respectively. The yield stress for all elements of the three hold FEM model and the buckling stress for the selected stiffened panels are evaluated as the constraint conditions. The selected stiffened panels are on the bottom plate, the inner bottom plate, the girder plate, the floor plate, and the bilge hopper plate. The optimal calculations are performed with five combinations of the design variables and the constraint conditions, and the designs obtained by the optimal analyses are compared. It is shown that the structural optimization with the design variables for the shape and size of the bottom structure can reduce the weight of ship structure and satisfy the constraint conditions effectively. Since the design variables take discrete values, this problem becomes combinatorial optimization. So, the genetic algorithm is used for the optimal analyses.

本文言語English
ホスト出版物のタイトルProceedings of the 21st (2011) International Offshore and Polar Engineering Conference, ISOPE-2011
ページ839-844
ページ数6
出版ステータスPublished - 2011
外部発表はい
イベント21st International Offshore and Polar Engineering Conference, ISOPE-2011 - Maui, HI, United States
継続期間: 2011 6月 192011 6月 24

出版物シリーズ

名前Proceedings of the International Offshore and Polar Engineering Conference
ISSN(印刷版)1098-6189
ISSN(電子版)1555-1792

Conference

Conference21st International Offshore and Polar Engineering Conference, ISOPE-2011
国/地域United States
CityMaui, HI
Period11/6/1911/6/24

ASJC Scopus subject areas

  • エネルギー工学および電力技術
  • 海洋工学
  • 機械工学

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