• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Reliability analysis of ship structure subjected to combined loads taking account of phase difference among loads

Research Project

Project/Area Number 17H03488
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Naval and maritime engineering
Research InstitutionOsaka University

Principal Investigator

Iijima Kazuhiro  大阪大学, 工学研究科, 教授 (50302758)

Co-Investigator(Kenkyū-buntansha) 藤久保 昌彦  大阪大学, 工学研究科, 教授 (30156848)
馬 沖  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 (30773197)
高見 朋希  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 (50586683)
辰巳 晃  大阪大学, 工学研究科, 助教 (60736487)
Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥16,250,000 (Direct Cost: ¥12,500,000、Indirect Cost: ¥3,750,000)
Fiscal Year 2019: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2017: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Keywords構造信頼性 / 船体荷重 / FORM / 複合荷重 / 代理モデル / モンテカルロシミュレーション / 設計波 / 流力弾性 / モンテカルロ法 / 不確実性 / 浮体構造 / 連成解析 / CFD-FEA / 低次元化モデル / 船体構造 / 局部応答 / 模型実験 / 極値 / 信頼性解析 / 衝撃荷重 / 局部曲げ / 設計不規則波 / 極値確率分布 / 位相差
Outline of Final Research Achievements

This research addresses the structural safety assessment of a ship under combined loads including hull girder bending moment, local double bottom bending moment, and whipping moment. A simulation technique coupled between CFD(Computational Fluid Dynamics) and FEM(Finite Element Method) is developed. The developed method is shown to be effective in evaluating the combined loads and a ship’s response under the combined loads. By adopting a surrogate model with the simulation method above and FORM(First Order Reliability Method), the extreme combined loads and load effects including the hydroelastic vibrations under the irregular waves are obtained. The results are validated against scaled model tests. By adopting the FORM again, the structural reliability of a ship under the combined loads are assessed.

Academic Significance and Societal Importance of the Research Achievements

近年のコンテナ船の折損事故の要因に、船体縦曲げ荷重と二重底曲げの複合荷重、また船体波浪中弾性振動との重畳による複合荷重が挙げられる。本研究では、第一原理に基づく流体力学的手法と構造力学的手法を組み合わせて、位相差を含めて厳密に考慮できる手法を開発した。同手法を、複合荷重が再現できる縮尺模型を用いた試験水槽で確認した。さらに、不規則波中のランダムな極限事象について、時間が掛かる同手法の代わりに同じ精度を有する簡易モデルで代理させ(代理モデル)、信頼性手法を組み合わせた新しい安全性評価手法を開発した。いずれも複合荷重下の船体応答について、従来では得られなかった最先端の知見を与えるものである。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Annual Research Report
  • 2017 Annual Research Report

Research Products

(31 results)

All 2020 2019 2018 2017

All Journal Article (13 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 13 results,  Open Access: 2 results) Presentation (18 results) (of which Int'l Joint Research: 4 results)

  • [Journal Article] Nonlinear waves in a floating thin elastic plate, predicted by a coupled SPH and FEM simulation and by an analytical solution2020

    • Author(s)
      Ma, C, Ijima, K, Oka, M
    • Journal Title

      Ocean Engineering

      Volume: 204

    • DOI

      10.1016/j.oceaneng.2020.107243

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Extreme Value Prediction of Nonlinear Ship Loads by FORM Using Prolate Spheroidal Wave Functions2020

    • Author(s)
      Takami, T., Iijima, K., and Jensen, J.J.
    • Journal Title

      Marine Structures

      Volume: -

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] An Efficient Method for Prediction of the Tail of Probability of Exceedance of Vertical Bending Moment in a Ship Based on Nonlinear Time-Domain Simulations2020

    • Author(s)
      Pal, SK, Ohno, T, Iijima, K.
    • Journal Title

      Proceedings of ISOPE2020

      Volume: -

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Experimental Assessment of FORM Based Approach for Predicting Extreme Value Distribution of Hull Girder Bending Moment in a Ship2019

    • Author(s)
      Takami, T, Komoriyama, Y., Ando, T., and Iijima, K.
    • Journal Title

      Proceedings of the ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering (OMAE2019)

      Volume: 38

    • DOI

      10.1115/omae2019-95389

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Efficient FORM Based Extreme Value Prediction of Nonlinear Ship Loads with an Application of Reduced Order Model for Coupled CFD and FEA2019

    • Author(s)
      Takami, T, Komoriyama, Y, Ando, T, Ozeki, S, and Iijima, K
    • Journal Title

      Journal of Marine Science and Technology

      Volume: -

    • DOI

      10.1007/s00773-019-00667-8

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Numerical Investigation into Combined Global and Local Hydroelastic Response in a Large Container Ship Based on Two-way Coupled CFD and FEA2019

    • Author(s)
      Takami, T and Iijima, K
    • Journal Title

      Journal of Marine Science and Technology

      Volume: -

    • DOI

      10.1007/s00773-019-00668-7

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Effects of Weather Routing on Maximum Vertical Bending Moment in a Ship Taking Account of Wave-Induced Vibrations2019

    • Author(s)
      Iijima, K., Ueda, R., Tamaru, H. and Fujikubo, M.
    • Journal Title

      Journal of Offshore Mechanics and Arctic Engineering

      Volume: 141(3) Pages: 031101-11

    • DOI

      10.1115/1.4041997

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Derivation of Design Irregular Wave for Assessing Vertical Strength of a Ship Considering Double Bottom Bending2018

    • Author(s)
      高見 朋希, 飯島 一博
    • Journal Title

      J.JASNAOE

      Volume: 28 Issue: 0 Pages: 111-120

    • DOI

      10.2534/jjasnaoe.28.111

    • NAID

      130007609329

    • ISSN
      1880-3717, 1881-1760
    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Numerical Method to Estimate Fluid-Structure Interaction Effect of Ships under Severe Wave Condition2018

    • Author(s)
      Takami, T. and Iijima, K.
    • Journal Title

      Proceedings of OMAE2018

      Volume: 3

    • DOI

      10.1115/omae2018-77845

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Elasto-Plastic Beam Afloat on Water Subjected to Waves2018

    • Author(s)
      Iijima, K., Tatsumi, A. and Fujikubo, M.
    • Journal Title

      Proceedings of OMAE2018

      Volume: 9

    • DOI

      10.1115/omae2018-78646

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A numerical simulation method for predicting global and local hydroelastic response of a ship based on CFD and FEA coupling2018

    • Author(s)
      Tomoki Takami, Sadaoki Matsui, Masayoshi Oka, Kazuhiro Iijima
    • Journal Title

      Marine Structures

      Volume: 59 Pages: 368-386

    • DOI

      10.1016/j.marstruc.2018.02.009

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Numerical Investigation Into Uncertainty of Wave-Induced Vibration of Large Container Ships due to Ship Operation2017

    • Author(s)
      Kazuhiro Iijima, Rika Ueda and Masahiko Fujikubo
    • Journal Title

      Proceedings of ASME OMAE2017, Trondheim, Norway

      Volume: 9

    • DOI

      10.1115/omae2017-62336

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Study on Application of CFD and FEM Coupling Method to Evaluate Dynamic Response of Ship Under Severe Wave Condition2017

    • Author(s)
      Tomoki Takami, Masayoshi Oka and Kazuhiro Iijima
    • Journal Title

      Proceedings of ASME OMAE2017, Trondheim, Norway

      Volume: 7A

    • DOI

      10.1115/omae2017-61553

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Presentation] CFD-FEA 連成解析に基づくホイッピングを含む 縦曲げモーメントの極値予測法の開発2019

    • Author(s)
      高見朋希、飯島一博
    • Organizer
      日本船舶海洋工学会春季講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] On the Assessment of Extreme Wave-induced Bending Moment of a Ship by FORM and Reduced Order Method Based on Coupled CFD and FEA2019

    • Author(s)
      Takami, T., Ozeki, S., and Iijima, K.
    • Organizer
      PRADS2019
    • Related Report
      2019 Annual Research Report
  • [Presentation] Consequence Analysis of VLFS Collapse to Heavy Sea Loads2018

    • Author(s)
      飯島一博
    • Organizer
      Design for Safety 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Extreme Value Prediction of Whipping Response of a Ship by FORM Based on Coupled CFD and FEA Simulations2018

    • Author(s)
      高見朋希
    • Organizer
      SAROSS2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Extreme Value Distribution of Combined Hull Girder and Double Bottom Bending Moments in a Container Ship by FORM2018

    • Author(s)
      鍋島里佳
    • Organizer
      TEAM2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A Nonlinear Numerical Fluid-Structure Interaction Research for Hydro-Elastoplastic Behavior of VLFS2018

    • Author(s)
      馬沖
    • Organizer
      Hydroelasticity in Marine Technology
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 船体の局部構造応答を考慮した設計不規則波推定法2018

    • Author(s)
      高見朋希
    • Organizer
      日本船舶海洋工学会春季講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] CFD-FEA連成手法を用いた極限海象中の船体弾性応答評価について(第2報:強 連成法の構築)2018

    • Author(s)
      高見朋希
    • Organizer
      日本船舶海洋工学会春季講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] The Effect of Heavy Weather Avoidance and Speed Reduction on Long-term Vertical Bending Moment Taking Account of Whipping Response2017

    • Author(s)
      Rika UEDA, Kazuhiro IIJIMA, Masahiko FUJIKUBO
    • Organizer
      TEAM2017, Osaka
    • Related Report
      2017 Annual Research Report
  • [Presentation] Real-Time Estimation of Structural Deformation of Large Ships for Navigation Decision Support2017

    • Author(s)
      Hirohito NISHIDA, Rika UEDA, Kazuhiro IIJIMA, Masahiko FUJIKUBO
    • Organizer
      TEAM2017, Osaka
    • Related Report
      2017 Annual Research Report
  • [Presentation] Fully Nonlinear Numerical Simulation of Fluid-Structure Interaction based on Smoothed Particle Hydrodynamics and Structural Finite Element Method2017

    • Author(s)
      Chong Ma, Kazuhiro Iijima, Masayoshi Oka
    • Organizer
      TEAM2017, Osaka
    • Related Report
      2017 Annual Research Report
  • [Presentation] Experiment Design for Collapse Behavior of Large Container Ship under Slamming-Induced Whipping Load2017

    • Author(s)
      Yuki KADOKAMI, Kazuhiro IIJIMA, Masahiko FUJIKUBO
    • Organizer
      TEAM2017, Osaka
    • Related Report
      2017 Annual Research Report
  • [Presentation] Development of CFD and FEA coupling method and its application to hydro-elastic response estimation2017

    • Author(s)
      Tomoki TAKAMI, Masayoshi OKA, Kazuhiro IIJIMA
    • Organizer
      TEAM2017, Osaka
    • Related Report
      2017 Annual Research Report
  • [Presentation] A Study on the Stochastic Characteristics of Wave Load Sequences including Whipping Vibrations in a Container Ship2017

    • Author(s)
      Luis DE GRACIA, Naoki OSAWA, Kazuhiro IIJIMA, Toichi FUKASAWA
    • Organizer
      TEAM2017, Osaka
    • Related Report
      2017 Annual Research Report
  • [Presentation] CFD-FEA連成手法を用いた極限海象中の船体弾性応答評価について2017

    • Author(s)
      高見朋希, 岡正義, 飯島一博
    • Organizer
      日本船舶海洋工学会秋季講演会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 水線上の形状変更による浮体構造に作用する漂流力低減に関する研究2017

    • Author(s)
      郷田健人, 飯島一博, 馬沖, 藤久保昌彦
    • Organizer
      日本船舶海洋工学会秋季講演会
    • Related Report
      2017 Annual Research Report
  • [Presentation] A Fluid-Structure Interaction Research based on Smoothed Particle Hydrodynamics and Structural Finite Element Method2017

    • Author(s)
      馬 沖, 岡 正義, 飯島 一博
    • Organizer
      日本船舶海洋工学会春季講演会
    • Related Report
      2017 Annual Research Report
  • [Presentation] Fully Nonlinear Numerical Simulation of Fluid-Structure Interaction based on Smoothed Particle Hydrodynamics and Structural Finite Element Method2017

    • Author(s)
      C. Ma, M. Oka, K. Iijima
    • Organizer
      3rd DualSPHysics Users Workshop
    • Related Report
      2017 Annual Research Report

URL: 

Published: 2017-04-28   Modified: 2021-02-19  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi