Numerical Study on the Fatigue Strength of the Ship Structure in Arctic Ice Sea

• Project/Area Number: 20760559
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Naval and maritime engineering
• Research Institution: Osaka University
• Principal Investigator: SAWAMURA Junji Osaka University, 工学研究科, 助教 (90359670)
• Project Period (FY): 2008 – 2009
• Project Status: Completed (Fiscal Year 2009)
• Budget Amount: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2009: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000); Fiscal Year 2008: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
• Keywords: 極地工学 / 砕氷荷重 / 耐氷構造 / 流体構造連成解析 / 疲労設計 / 氷荷重頻度 / 流体構造錬成解析 / 砕氷パターン / 構造-流体連成FEM解析

Research Abstract

In this study, we developed the numerical method to estimate the repetitive ice load in ship maneuvering in level ice for fatigue assessment of icebreakers and ice merchant ships. 1) Database of the ice breaking force was constructed by the Finite Element numerical simulation. 2) The numerical simulation code was developed to calculate the repetitive ship-hull contact and the ice load in level ice. 3) The ice load and ice breaking channels in various ship and ice conditions were calculated by our developed program.

Research Products

• [Journal Article] Hiroyuki Tsuchiya and Naoki Osawa, Bending Behavior of Wedge-Shaped Floating Ice Sheet (2009)
  • Author(s): Junji Sawamura, Takashi Tachibana, Hiroyuki Tsuchiya, Naoki Osawa
  • Journal Title: The 23th Asian Technical Exchange and Advisory Meeting on Marine Structures Vol.1 Pages: 81-85
• [Journal Article] Numerical Simulation of Ice Force around a Ship Hull in Level Ice (2009)
  • Author(s): Hiroyuki Tsuchiya, Junji Sawamura, Takashi Tachibana, Naoki Osawa
  • Journal Title: The 23th Asian Technical Exchange and Advisory Meeting on Marine Structures Vol.1 Pages: 399-404
• [Journal Article] Numerical Simulation of Breaking Pattern in Level Ice at Ship's Bow (2009)
  • Author(s): Sawamura J., Riska K., Moan T
  • Journal Title: The proceeding of 19th International Offshore and Polar Engineering Conference Vol.1 Pages: 600-607
  • Peer Reviewed
• [Journal Article] Numerical Simulation of Breaking Pattern in Level Ice at Ship's Bow (2009)
  • Author(s): Sawamura J., Riska K., Moan T
  • Journal Title: The proceeding of 19th International Offshore and Polar Engineering Conference 1 Pages: 600-607
  • Peer Reviewed
• [Journal Article] Bending Behavior of Wedge-Shaped Floating Ice Sheet (2009)
  • Author(s): Junji Sawamura, Takashi Tachibana, et.al
  • Journal Title: The 23th Asian Technical Exchange and Advisory Meeting on Marine Structures 1 Pages: 81-85
• [Journal Article] Numerical Simulation of Ice Force around a Ship Hull in Level Ice (2009)
  • Author(s): Hiroyuki Tsuchiya, Junji Sawamura, et. Al
  • Journal Title: The 23th Asian Technical Exchange and Advisory Meeting on Marine Structures 1 Pages: 399-404
• [Journal Article] Finite Element Analysis of Fluid-Ice Interaction during Ice Bending (2008)
  • Author(s): Sawamura J., Riska K., Moan, T
  • Journal Title: Proceeding of 19th IAHR International Symposium on Ice Vol.1 Pages: 191-203
  • Peer Reviewed
• [Journal Article] Finite Element Analysis of Fluid-Ice Interaction during Ice Bending (2008)
  • Author(s): Sawamura J., Riska K., Moan, T
  • Journal Title: Proc. 19th IAHR International Symposium on Ice 1 Pages: 191-203
• [Journal Article] Numerical Investigation for the Bending Failure of Wedge-Shaped Floating Ice
  • Author(s): Junji Sawamura, Takashi Tachibana, Hiroyuki Tsuchiya, Naoki Osawa
  • Journal Title: Proceeding of 20th IAHR International Symposium on Ice (投稿中)
  • Peer Reviewed
• [Presentation] Bending Behavior of Wedge-Shaped Floating Ice Sheet (2009)
  • Author(s): Junji Sawamura
  • Organizer: The 23th Asian Technical Exchange and Advisory Meeting on Marine Structures
  • Place of Presentation: Kaohsiung
  • Year and Date: 2009-12-01
• [Presentation] Bending Behavior of Wedge-Shaped Floating Ice Sheet (2009)
  • Author(s): Junji Sawamura
  • Organizer: The 23th Asian Technical Exchange and Advisory Meeting on Marine Structures
  • Place of Presentation: Kaohsiung, TAIWAN
  • Year and Date: 2009-12-01
• [Presentation] Numerical Simulation of Breaking Pattern in Level Ice at Ship's Bow (2009)
  • Author(s): Junji Sawamura
  • Organizer: The proceeding of 19th International Offshore and Polar Engineering Conference
  • Place of Presentation: Osaka, JAPAN
  • Year and Date: 2009-06-24
• [Presentation] Numerical Simulation of Breaking Pattern in Level Ice at Ship's Bow (2009)
  • Author(s): Junji Sawamura
  • Organizer: The proceeding of 19th International Offshore and Polar Engineering Conference
  • Place of Presentation: Osaka JAPAN
  • Year and Date: 2009-06-24
• [Presentation] Finite Element Analysis of Fluid Ice Interaction during Ice Bending (2008)
  • Author(s): Junji Sawamura
  • Organizer: 19th IAHR International Symposium on Ice
  • Place of Presentation: Vancouver, Canada
  • Year and Date: 2008-07-08
• [Presentation] Finite Element Analysis of Fluid-Ice Interaction during Ice Bending (2008)
  • Author(s): Junji Sawamura
  • Organizer: 19th IAHR International Symposium on Ice
  • Place of Presentation: Vancouver, Canada
  • Year and Date: 2008-07-08