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FUNDAMENTAL RESEARCH ON MECHANISM OF CAPSIZING OF SHIPS IN WAVES

Research Project

Project/Area Number 03650371
Research Category

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

Allocation TypeSingle-year Grants
Research Field 船舶抵抗・運動性能・計画
Research InstitutionNAGASAKI INSTITUTE OF APPLIED SCIENCE

Principal Investigator

SHIN Chanik  NAGASAKI INSTITUTE OF APPLIED SCIENCE, PROFESSOR, 工学部, 教授 (20086391)

Project Period (FY) 1991 – 1993
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 1993: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1992: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1991: ¥900,000 (Direct Cost: ¥900,000)
KeywordsCAPSIZING / STABILITY / INCLINED SHIP / MECHANISM OF CAPSIZING / SHIPPING WATER / COUPLED MOTIONS / DYNAMIC SWELL-UP / BULWARK / ブルワーク / 打ち込み水 / 滞留水 / 自由水 / 放水口 / フルワーク / 水槽実験 / シミュレーション / 転覆現象 / 波浪中船体運動 / 連成運動
Research Abstract

In considering the safety plan of the ship, it is important to treat the motions of the inclined ship in waves. When a ship is inclined at an arbitrary angle due to the effect of strong wind or shift of cargo etc., the ship's cross section under the water line is asymmetry. Therefore the coupled effects between symmetric motions and anti-symmetric motions can not be ignored.
These the effects was investigated by equation of inclined ship motions and tank test using ship model.
In the experiments, it was observed that the inclined ship rolls with large angle in bow sea condition.
To develop an analytical method for capsizing of the ship with bulwark, experiments for capsizing of two-dimensional bodies with the bulwark was carried out in regular transverse waves.
The experimental results show that capsizing of two-dimensional bodies was caused by the quantity of shipped water on the deck and the effects of bulwark height.
The dynamic swell-up due to the disturbance of orbital motion of water particles on the ship's sides in the oblique waves was investigated theoretically.
Model experiments on the dynamic swell-up due to the oblique waves were carried out for a ship model with the Lewis form cross sections fixed in the oblique waves. Another model experiments on the safety of ships in the waves were carried out for that ship model and a model of fishing vessel.
If deck wetting occurs repeatedly, some amount of shipping water is accumulated on deck. In this situation, stationary oscillation around heeling condition and/or capsizing of the ship occur in waves.

Report

(4 results)
  • 1993 Annual Research Report   Final Research Report Summary
  • 1992 Annual Research Report
  • 1991 Annual Research Report
  • Research Products

    (5 results)

All Other

All Publications (5 results)

  • [Publications] 慎 燦益: "二次元柱状体の規則波中の転覆実験(その3)" 長崎総合科学大学紀要. 33. 11-20 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] SHIN,CHAN IK: "On the Relation between the Stability and the Roll of Ships in Waves" The Proceedings of 5th INTERNATIONAL CONFERENCE ON STABILITY OF SHIPS AND OCEAN VEHICLES. (予定). (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] SHIN, CHAN IK: "Experimental Research on Capsizing of Two-dimensional Bodies in Regular Waves(Part 3)" THE BULLETIN OF NAGASAKI INSTITUTE OF APPLIED SCIENCE. VOL.33. 11-20 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] SHIN, CHAN IK: "On the Relation between the Stability and the Roll of Ships in Waves" The Proceedings of 5th INTERNATIONAL CONFERENCE ON STABILITY OF SHIPS AND OCEAN VEHICLES. (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 慎 燦益: "二次元柱状体の規則波中の実験(その3)" 長崎総合科学大学 紀要. 33. 11-20 (1992)

    • Related Report
      1992 Annual Research Report

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

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