Ultimate strength of ship structure and its uncertainty model

• Project/Area Number: 20246126
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Naval and maritime engineering
• Research Institution: Osaka University
• Principal Investigator: FUJIKUBO Masahiko Osaka University, 工学研究科, 教授 (30156848)
• Co-Investigator(Kenkyū-buntansha): IIJIMA Kazuhiro 大阪大学, 工学研究科, 講師 (50302758) ; OKAZAWA Shigenobu 広島大学, 工学研究科, 准教授 (10312620) ; YANAGIHARA Daisuke 愛媛大学, 理工学研究科, 准教授 (10294539)
• Project Period (FY): 2008 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥24,050,000 (Direct Cost: ¥18,500,000、Indirect Cost: ¥5,550,000); Fiscal Year 2010: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000); Fiscal Year 2009: ¥10,140,000 (Direct Cost: ¥7,800,000、Indirect Cost: ¥2,340,000); Fiscal Year 2008: ¥8,970,000 (Direct Cost: ¥6,900,000、Indirect Cost: ¥2,070,000)
• Keywords: 船体構造 / 最終強度 / 不確定性 / 損傷 / リスク解析 / 船舶工学 / 構造工学 / 座屈・最終強度 / 理想化構造要素法 / 確率モデル

Research Abstract

The ultimate strength of ship structures in the damaged as well as intact condition is studied including the uncertainty in the strength. The following achievements were made: (1) The ultimate strength of a continuous stiffened panel with crack damage under combined thrust and lateral pressure were investigated ; (2) The model uncertainty in the prediction of the ultimate longitudinal bending strength of a hull girder using Smith method was quantified ; (3) The Smith method was extended to be applied to the cross section with damages ; (4) ISUM system for the efficient analysis of the ultimate strength of a ship structure with and without damages were developed ; (5) A dynamical model to predict the collapse behavior of a ship hull girder considering the interaction between plastic deformation and fluid forcse was developed and verified by the tank test.

Research Products

• [Journal Article] リスク評価に基づく船体縦曲げ最終強度の目標安全性の検討 (2011)
  • Author(s): 飯島一博、藤久保昌彦
  • Journal Title: 日本船舶海洋工学会論文集 Vol.13(掲載予定)
  • NAID: 10029345645
  • Peer Reviewed
• [Journal Article] Development of ISUM Shear Plate Element and Its Application to Progressive Collapse Analysis of Plates under Combined Loading (2010)
  • Author(s): Zhiyong Pei, Tomoki Takami, Kazuhiro Iijima, Masahiko Fujikubo, Tetsuya Yao
  • Journal Title: Proceedings of the twenties Nineteenth 2009 International Offshore and Polar Engineering Conference, ISOPE2010 Volume: CD
  • Peer Reviewed
• [Journal Article] Total System Including Capacity Calculation Applying ISUM/FEM and Loads Calculation for Progressive Collapse Analysis of Ship's Hull Girder in Longitudinal Bending (2009)
  • Author(s): Tetsuya YAO, Masahiko. FUJIK UBO, Kazuhiro. IIJIMA, Zhiyong PEI
  • Journal Title: Proceedings of The Nineteenth 2009 International Offshore and Polar Engineering Con ference, ISOPE2009 CD
  • Peer Reviewed
• [Journal Article] Total System Including Capacily Calculation Applying ISUM/FEM and Loads Calculation for Progressive Collapse Analysis of Ship's Hull Girder in Longitudinal Bending (2009)
  • Author(s): Tetsuya YAO, Masahiko. FUJIKUBO, Kazuhiro. IIJIMA, Zhiyong PEI
  • Journal Title: Proceedings of The Nineteenth 2009 International Offshore and Polar Engineering Conference, ISOPE2009 (掲載予定)
  • Peer Reviewed
• [Presentation] Fujikubo : Hydroelasto-plasticity Approach to Predicting the Postultimate Strength Behavior of Ship's Hull Girder in Waves (2011)
  • Author(s): K. Iijima, K. Kimura, W.J. Xu, M.
  • Organizer: Proc. of Marstruct 2011
  • Place of Presentation: Hamburg, Germany
  • Year and Date: 2011-03-29
• [Presentation] き裂損傷を有する防撓パネルの圧壊挙動に関する研究 (2010)
  • Author(s): 柳原大輔, 三宅良文
  • Organizer: 日本船舶海洋工学会講演会論文集
  • Place of Presentation: 佐世保
  • Year and Date: 2010-11-05
• [Presentation] Development of ISUM Shear Plate Element and Its Application to Progressive Collapse Analysis of Plate under Combined Loading (2010)
  • Author(s): Z. Pei, T. Takami, K. Iijima, M. Fujikubo, T. Yao
  • Organizer: Proc. of ISOPE 2010
  • Place of Presentation: Beijing, China
  • Year and Date: 2010-06-24
• [Presentation] き裂損傷を有する防撓パネルの圧壊挙動に関する研究 (2010)
  • Author(s): 柳原大輔, 三宅良文
  • Organizer: 日本船舶海洋工学会講演会論文集
  • Place of Presentation: 佐世保市
  • Year and Date: 2010-05-20
• [Presentation] リスクモデルに基づく船体の縦曲げ強度の目標安全性 レベルに関する研究 (2009)
  • Author(s): 藤久保昌彦、飯島一博
  • Organizer: 異本船舶海洋工学会関西支部講演会
  • Place of Presentation: 大阪大学
  • Year and Date: 2009-11-05
• [Presentation] Change in Safety Level against Collapse of Ship's Hull Girder in Longitudinal Bending According to Change in Design Criteria (2009)
  • Author(s): K. Iijima, M. Fujikubo
  • Organizer: Proc, of ICOSSAR2009
  • Place of Presentation: Osaka, Japan
  • Year and Date: 2009-09-15
• [Presentation] Change in Safety Level against Collapse of Ship's Hull Girder in Longi tudinal Bending According to Change in Design Criteria (2009)
  • Author(s): K.Lijima, et al.
  • Organizer: ICOSSAR2009
  • Place of Presentation: Osaka
  • Year and Date: 2009-09-13
• [Presentation] A system for Progressive Collapse Anaklysis of Ship's Hull Girder in waves with Combined ISUM/FEM and Wave response Analyses (2009)
  • Author(s): T. Yao, M. Fujikubo, K. Iijima, Z.Y, Pei
  • Organizer: Proc. of ISOPE2009
  • Place of Presentation: Osaka, Japan
  • Year and Date: 2009-06-24