Study on the Dynamic Hull Girder Ultimate Strength and Structural Reliability of Large Container Ships Considering Uncertinities

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K06627
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Naval and maritime engineering
• Research Institution: National Institute of Maritime, Port and Aviation Technology
• Principal Investigator: Yamada Yasuhira 国立研究開発法人海上・港湾・航空技術研究所, その他部局等, 研究員 (90443241)
• Co-Investigator(Kenkyū-buntansha): 田中 義照 国立研究開発法人海上・港湾・航空技術研究所, その他部局等, 研究員 (40373419) ; 小沢 匠 国立研究開発法人海上・港湾・航空技術研究所, その他部局等, 研究員 (80711332) ; 岡 正義 国立研究開発法人海上・港湾・航空技術研究所, その他部局等, 研究員 (70450674)
• Co-Investigator(Renkei-kenkyūsha): KAWAMURA Yasumi 横浜国立大学, 大学院工学研究院, 教授 (50262407)
• Research Collaborator: KAMEYA Kyoko 法政大学, 職員
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 船体最終強度 / 動的応答 / スラミング / コンテナ船 / 非線形FEA / 荷重周期 / Smith法 / 縦曲げモーメント

Outline of Final Research Achievements

A series of 3-dimentional non-linear finite element simulation is carried out using a full model ship in order to investigate dynamic structural response of container ships.
①Dynamic collapse mechanism and structural response of container ships due to longitudinal bending moment are investigated in detail.②Effects of load duration , amplitude and analysis models on dynamic structural response of ultimate strength is investigated.③It is found by the analysis that, 1 transverse model gives un-conservative results, and that a full model and/or 1/2 hold model gives fairly reasonable results. ④Accuracies of 3 analysis methods(non-linear FEA, simplified method, closed formula) are compared, and a new closed formula for container ships is developed and its effectiveness is verified. ⑤Validation analysis for model test is carried out and effects of friction as well as in-plane stress-concentration on ultimate strength is revealed.

Free Research Field

船舶海洋工学