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Development of Optimization Method for Redundant Structure Based on Reliability Assessment Considering Damage of Collapse Mode

Research Project

Project/Area Number 03650364
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 船舶構造・建造
Research InstitutionOsaka University

Principal Investigator

MURAKAWA Hidekazu  Osaka University, Welding Research Institute, Associate Professor, 溶接工学研究所, 助教授 (60166270)

Project Period (FY) 1991 – 1992
Project Status Completed (Fiscal Year 1992)
Budget Amount *help
¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1992: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1991: ¥500,000 (Direct Cost: ¥500,000)
KeywordsReliability Assessment / Optimum Design / Damage of Collapse Mode / Significance of Optimization / Large Scale Structure / MonteCarlo Simulation / Learning Algorithm / Hierarchical Optimization / 非正規乱数 / 致命度 / 冗長構造物 / 安全率 / 信頼性指標 / 信頼性の配分 / 初期破損 / 最終強度
Research Abstract

The fundamental philosophy of structural design can be divided into two according to the criterion which defines the failure of a structure. One is the allowable stress design based on the initial failure of individual member. The other is the design based on the ultimate strength of a structure. The design or the assessment of the safety of the structure can be further divided into deterministic and probabilistic approaches. However, regardless of these differences, the general goal of the design is an optimization of the structure with maintaining sufficient reliability.
In this research, optimum designs of truss structures based on the deterministic and the probabilistic estimation of the strength for both the initial failure and the ultimate failure criteria are studied. Especially, a new probabilistic optimization method based on the ultimate strength is proposed. It employs the idea of optimum distribution of safety indices for each failure mode. Further, the significance of the optimum design based on the reliability is discussed through the comparison with deterministic approaches. Also, to deal with large scale structures, a hierarchical optimization method using MonteCarlo simulation with learning algorithm is proposed.

Report

(3 results)
  • 1992 Annual Research Report   Final Research Report Summary
  • 1991 Annual Research Report
  • Research Products

    (5 results)

All Other

All Publications (5 results)

  • [Publications] 村川 英一: "信頼性評価に基づく最適設計の意義に関する一考案" 関西造船協会誌. 218. 263-274 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Hidekazu MURAKAWA, Yukio UEDA, Shouji YAMAGATA and Kazuya NAGI: "Significance of Optimum Design Based on Reliability" Journal of Kansai Society of Naval Architects. No.218. 263-274 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Hidekazu MURAKAWA, Yukio UEDA and Kazuya NAGI: "hierarchical optimization method Using MonteCarlo Simulation with learning algorithm" Journal of Kansai Society of Naval Architects.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] 村川 英一: "信頼性評価に基づく最適設計の意義に関する一考察" 関西造船協会誌. 218. 263-274 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 村川 英一,上田 幸雄,山形 祥司,奈木 一也: "信頼性評価に基づく最適設計の意義に関する一考察" 関西造船協会誌. (1992)

    • Related Report
      1991 Annual Research Report

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Published: 1991-04-01   Modified: 2016-04-21  

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