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Structural analysis of ship hull using ultra large-scale welding mechanics analysis and collapse analysis

Research Project

Project/Area Number 16K18324
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Naval and maritime engineering
Research InstitutionOsaka Prefecture University

Principal Investigator

Ikushima Kazuki  大阪府立大学, 工学(系)研究科(研究院), 助教 (80734003)

Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords非線形有限要素解析 / 大規模解析 / 座屈崩壊挙動 / 溶接変形 / 残留応力 / 座屈 / 防撓構造 / 計算力学 / 構造解析 / 溶接 / 並列計算
Outline of Final Research Achievements

In this research, in order to achieve accurate prediction of the ultimate strength of structures, an analysis system was developed by integrating the both welding mechanics analysis and ultimate strength analysis. In the developed system, to perform a large-scale analysis, algebraic multigrid method and parallelization using a graphics processing unit were introduced. The developed system was applied to the ultimate strength analysis of the 4-point bending of fundamental stiffened structure. As a result, it was found that the developed analysis system can accurately predict the ultimate strength. To show the applicability to the large-scale structure, the developed system was applied to the ultimate strength analysis of ship hull block model. The results showed that the developed system can investigate the effect of welding on the ultimate strength of the structure.

Academic Significance and Societal Importance of the Research Achievements

本研究では鋼構造物の最終強度解析の高度化を目的に、最終強度に対して影響を持つと考えられる溶接の影響を考慮するため、溶接力学解析手法を最終強度解析手法に対して統合した手法を新たに開発した。船体構造物の最終強度解析は古くからなされているが、その多くは溶接組み立て時の変形や残留応力に対して何らかの仮定をしている。本研究で開発された解析手法を用いることで、溶接力学解析手法を用いて直接的にこれらの影響を考慮可能となることから、本研究は最終強度解析の高精度化に寄与するものといえる。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (9 results)

All 2018 2017 2016

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (7 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] Nonlinear Computational Welding Mechanics for Large Structures2018

    • Author(s)
      K. Ikushima, M. Shibahara
    • Journal Title

      Journal of Offshore Mechanics and Ocean Engineering

      Volume: Vol.141, No.2 Issue: 2 Pages: 021603-021603

    • DOI

      10.1115/1.4041395

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Influence of Various Factors on Welding Distortion of Thin-plate Structures2017

    • Author(s)
      M. Shibahara, T. Harada, S. Maeda, K. Ikushima
    • Journal Title

      QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY

      Volume: 35 Issue: 2 Pages: 146s-150s

    • DOI

      10.2207/qjjws.35.146s

    • NAID

      130006329360

    • ISSN
      0288-4771, 2434-8252
    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Presentation] Ultimate strength analysis of structures considering effect of welding distortions and residual stresses2018

    • Author(s)
      K. Ikushima, T. Harada, M. Shibahara
    • Organizer
      7th International Maritime Conference on DESIGN FOR SAFETY
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 領域分割法による溶接力学解析の大規模化に関する検討2018

    • Author(s)
      生島 一樹, 柴原 正和
    • Organizer
      溶接学会全国大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Numerical study on weld buckling distortion in thin plate2017

    • Author(s)
      S. Maeda, K. Ikushima, M. Shibahara
    • Organizer
      7th International Conference on Welding Science and Engineering
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 理想化陽解法FEMを用いた溶接座屈変形解析2017

    • Author(s)
      前田 新太郎, 生島 一樹, 柴原 正和
    • Organizer
      溶接構造シンポジウム2017
    • Related Report
      2017 Research-status Report
  • [Presentation] 溶接変形・残留応力を考慮した構造物の最終変形解析2017

    • Author(s)
      生島 一樹, 原田 貴明, 柴原 正和
    • Organizer
      日本船舶海洋工学会講演会
    • Related Report
      2017 Research-status Report
  • [Presentation] Study on Influence of Various Factors on Welding Distortion of Thin-plate Structures2016

    • Author(s)
      Takaaki Harada, Shintaro Maeda, Kazuki Ikushima, Masakazu Shibahara
    • Organizer
      Visual JW 2016
    • Place of Presentation
      大阪
    • Year and Date
      2016-10-17
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] 溶接時における薄板構造物の大変形解析2016

    • Author(s)
      前田新太郎、原田貴明、生島一樹、河原充、柴原正和
    • Organizer
      平成28年度溶接学会秋季全国大会
    • Place of Presentation
      群馬
    • Year and Date
      2016-09-14
    • Related Report
      2016 Research-status Report

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Published: 2016-04-21   Modified: 2020-03-30  

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