Investigation of Ship Structural Design Method by Means of Structural Reliability Approach and Design Irregular Wave Method

• Project/Area Number: 22560799
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Naval and maritime engineering
• Research Institution: Osaka Prefecture University
• Principal Investigator: FUKASAWA Toichi 大阪府立大学, 大学院・工学研究科, 教授 (80143171)
• Research Collaborator: MIYAZAKI Satoshi 三菱重工業(株), 長崎造船所造船設計部船殻設計課, 技師
• Project Period (FY): 2010 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2011: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2010: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
• Keywords: 船体構造設計 / 弾性振動 / 最大応答 / 確率分布 / 疲労強度 / マイナー則 / 信頼性解析 / 最悪短期海象 / 最大応力 / 海上安全 / 船舶工学 / 設計工学 / 設計不規則波

Research Abstract

This study aimed to examine the statistical characteristics of ship response in irregular sea way on the assumption that the design irregular wave method is used in the hull structural design and to propose a more accurate structural design method. Stresses generated in the hull-girder of a ship in irregular waves appear as the superposition of the flexible vibration component that varies in the natural frequency of the hull on the hydrodynamic component varying in encounter period with the waves. In the research, the probability distribution pattern of maximum response of a ship in irregular wave is investigated and the effect of flexible vibration component on the fatigue damage isclarified.

Research Products

• [Journal Article] Some Considerations on the effect of wave-induced vibrations upon hull-girder fatigue strength of a Post-Panamax container ship (2012)
  • Author(s): T.Fukasawa
  • Journal Title: Hydroelasticity2012 Pages: 389-398
  • Peer Reviewed
• [Journal Article] On the Effect of Whipping Vibrations upon the Fatigue Strength of a Post-Panamax Container Ship (2012)
  • Author(s): T.Fukasawa and K.Mukai
  • Journal Title: TEAM2012 Pages: 167-172
• [Journal Article] Probabilistic Consideration of Extreme Bending Moment of a Container Ship in Slamming Condition (2012)
  • Author(s): T.Fukasawa and K.Mukai
  • Journal Title: ICMT2012 Pages: 410-414
  • Peer Reviewed
• [Journal Article] Probabilistic Consideration of Extreme Bending Moment of a Container Ship in Slamming Condition (2012)
  • Author(s): Toichi Fukasawa and Keiichi Mukai
  • Journal Title: Proc. of 2012 International Conference on Maritime Technology (ICMT2012) Volume: 1 Pages: 410-414
  • Peer Reviewed
• [Journal Article] On the Effect of Whipping Vibrations upon the Fatigue Strength of a Post-Panamax Container Ship (2012)
  • Author(s): Toichi Fukasawa and Keiichi Mukai
  • Journal Title: Proc. of 26th Asian-Pacific Technical Exchange and Advisory Meeting on Marine Structure (TEAM2012) Volume: 1 Pages: 167-172
• [Journal Article] Estimation of Possible Maximum Vertical Bending Moment of a Post-Panamax Container Ship in a Lifetime (2010)
  • Author(s): T.Fukasawa
  • Journal Title: ICMT2012 Pages: 139-144
• [Journal Article] Estimation of Possible Maximum Vertical Bending Moment of a Post-Panamax Container Ship in a Lifetime (2010)
  • Author(s): Toichi Fukasawa
  • Journal Title: 24th Asian-Pacific Technical Exchange and Advisory Meeting on Marine Structures, TEAM 2010 Pages: 139-144
• [Journal Article] 設計不規則波を用いたコンテナ船の最大曲げモーメント推定とその統計的考察 (2010)
  • Author(s): 深沢塔一
  • Journal Title: 日本船舶海洋工学会講演会論文集 Volume: 11 Pages: 129-132
• [Presentation] 設計不規則波を用いたコンテナ船の最大曲げモーメント推定とその統計的考察 (2010)
  • Author(s): 深沢塔一
  • Organizer: 日本船舶海洋工学会 平成 22 年東部支部秋季講演会
  • Place of Presentation: タワーホール船堀
  • Year and Date: 2010-11-12