Ultimate Longitudinal Strength-Based Safety and Reliability Assessment of Ship's Hull Girder (2nd Report) : Stiffened Hull Structure

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概要

• 論文の詳細を見る

• In order to make a system safety and reliability assessment of ship structures in the longitudinal strength point of view, it is essential to analyze ultimate longitudinal strength of ship's hull girder under sagging or hogging bending moment. In the previous report, the author formulated an idealized plate element using idealized structural unit method and the developed method was then applied to ultimate longitudinal strength analysis of unstiffened hull structure as an example, concluding that the method is useful for ultimate collapse strength analysis of plate structure. In this study, an attempt is made to analyze ultimate longitudinal strength of stiffened hull structure by using idealized structural unit method. For this purpose, an idealized stiffened plate element subjected to biaxial load is developed taking account of the influence of initial imperfections as well as the interaction effect between local and global failure in the structure. The developed method is then applied to ultimate longitudinal strength analysis of Suezmax-sized double skin hull girder as an example for the intact and the damaged condition in the event of accidents of grounding and collision. A new deterministic measure of safety based on the absorbed energy capacity is proposed. Based on the obtained results, ultimate longitudinal strength-based safety and reliability assessment is made using the proposed measure of safety in addition to the conventional one, concluding that the objective hull structure has relatively sufficient safety and the present procedure is useful when ultimate longitudinal strength-based safety assessment or optimization is made in the structural design stage for a new type of hull structure.

• 社団法人日本船舶海洋工学会の論文

著者

• 白 点基

  Department Of Naval Architecture Pusan National University

• 白点 基

  大阪大学大学院博士課程

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• 矩形板および防撓板の理想化構造要素の開発 : 第2報 : 初期たわみと溶接残留応力を有し,面内荷重と積荷重を受ける場合
• Ultimate Longitudinal Strength-Based Safety and Reliability Assessment of Ship's Hull Girder (2nd Report) : Stiffened Hull Structure
• 構造全体の非線形性を考慮した理想化構造要素法 : 理想化矩形要素および防撓板要素
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• 矩形板の弾性座屈相関関係式
• 矩形板および防撓板の理想化構造要素の開発(第1報) : 面内荷重を受ける場合
• 組合せ荷重を受ける矩形板および防撓板の座屈および最終強度の相関関係 (第1報) : 2軸力と剪断を受ける場合

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