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Research on Vibration Analysis using Parallel Computing for Large Ship Structures

Research Project

Project/Area Number 14550862
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 船舶工学
Research InstitutionKYUSHU UNIVERSITY

Principal Investigator

YASUZAWA Yukitaka  KYUSHU UNIVERSITY, Faculty of Engineering, Associate Professor, 工学研究院, 助教授 (10191123)

Co-Investigator(Kenkyū-buntansha) MAEDA Masahiro  KYUSHU UNIVERSITY, Faculty of Engineering, Research Associate, 工学研究院, 助手 (70173713)
TOYODA Kazutaka  KYUSHU UNIVERSITY, Faculty of Engineering, Research Associate, 工学研究院, 助手 (10274507)
香川 洸二  九州大学, 大学院・工学研究院, 教授 (00253500)
Project Period (FY) 2002 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2004: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2003: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2002: ¥1,300,000 (Direct Cost: ¥1,300,000)
Keywordsparallel computing / vibration analysis / domain decomposition method / preconditioning / conjugate gradient method(CG method) / frequency response analysis / MPI / large-scale structural analysis / 並列計算 / 動的応答解析 / パラレルコンピューティング / 動的陽解法FEM / 動的陽解法 / FEM / 振動 / パラレルコンピューティンゲ / 高速ネットワーク / FEA / 強制振動
Research Abstract

Vibration analysis performed in the design stage has been mainly to solve natural frequencies and to avoid the resonances. But it is difficult to avoid a lot of resonance frequencies for large ship structures. It is partly because the structures are sometimes in contact with water. It makes difficult to avoid resonances by raising natural frequencies against exciting frequencies. In the next generation, establishment of magnitude of vibration responses are to be predicted by precise and whole structural analysis. But it takes a lot of time for computing and mesh generation.
In the present study, we have developed a method for frequency response curve for thin walled structures by use of parallel computing. In the method uses message passing library (MPI), PCs with Windows or Linux operation systems, Fortran compiler, and fast communication network environment. that is, parallel computing system which is composed of popular computing environment in usual business offices.
Firstly we propo … More sed DDBMG(Domain Decomposition Before Mesh Generation) scheme for total vibration analysis of whole ship structures. This scheme makes it possible that multiple man-powers can be also paralleled in the process of mesh generation.
Secondly we have developed a numerical program for vibration analysis considering parallel computation. The computation technique is based on conjugate gradient method(CG method) for domain decomposition methods(DDMs) in order to satisfy equilibrium and compatibility between domains. Discretization of the model is done by finite element method.
Thirdly, we have performed vibration analysis of thin-walled structures excited by harmonic excitation using developed parallel computing program. In that case degree of freedom on the domain boundary usually contains transfer displacement and rotation components. This mixed displacement components on domain boundaries often proved to spoil the convergence in CG iterations. Preconditioning by approximated diagonal scaling also proved to improve the convergence dramatically in the CG method. But for higher frequency domain, the convergence is still need more effective preconditioning for effective computation. Less

Report

(4 results)
  • 2004 Annual Research Report   Final Research Report Summary
  • 2003 Annual Research Report
  • 2002 Annual Research Report
  • Research Products

    (8 results)

All 2005 2004 2003 Other

All Journal Article (6 results) Book (1 results) Publications (1 results)

  • [Journal Article] 分散型コンピュータ環境を利用した並列計算による構造振動解析に関する研究2005

    • Author(s)
      安澤幸隆, 田渕祥子
    • Journal Title

      日本船舶海洋工学会講演論文集 1

      Pages: 281-284

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Parallel Computing for Large-scale Structural Vibration Analysis2005

    • Author(s)
      Y.Yasuzawa, S.Tabuchi
    • Journal Title

      Proc.of JASNAOE Vol.1

      Pages: 281-284

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] 並列化計算による動的陽解法FEMを用いた構造解析に関する研究2004

    • Author(s)
      安澤幸隆, 松下正幸, 杉本普一
    • Journal Title

      西部造船会会報 第108号

      Pages: 213-223

    • NAID

      110007628066

    • Related Report
      2004 Annual Research Report
  • [Journal Article] CHARACTERISTICS OF WAVE-INDUCED BENDING MOMENT AND SHEAR FORCE IN PONTOON-TYPE VLFSS2004

    • Author(s)
      Yukitaka YASUZAWA, Kohki HIRANO
    • Journal Title

      Proc.of 4Th Conf.for New Ship and Marine Technology

      Pages: 317-322

    • Related Report
      2004 Annual Research Report
  • [Journal Article] 並列コンピューティングによる動的構造解析の動向について2003

    • Author(s)
      安澤幸隆
    • Journal Title

      日本造船学会講演会論文集 2

      Pages: 1-2

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Trend of Parallel Computing for Dynamic structural Analysis2003

    • Author(s)
      Y.Yasuzawa
    • Journal Title

      Proc.of SNAJ Vol.2

      Pages: 1-2

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Book] 超大型浮体構造物の構造設計2004

    • Author(s)
      日本造船学会海洋工学委員会構造部会(含 安澤 幸隆)
    • Total Pages
      287
    • Publisher
      成山堂
    • Related Report
      2004 Annual Research Report
  • [Publications] 安澤 幸隆: "並列コンピューティングによる動的構造解析の動向について"日本造船学会講演会論文集第2号. 第2号. 1-3 (2003)

    • Related Report
      2003 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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