한국해양공학회지 (Journal of Ocean Engineering and Technology)

  • 제33권2호
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  • Pages.106-115
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  • 2019
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  • 1225-0767(pISSN)
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  • 2287-6715(eISSN)
한국해양공학회 (Korean Society of Ocean Engineers)
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슬로싱 액체 댐퍼를 이용한 사각형 폰툰의 운동 저감

Motion Reduction of Rectangular Pontoon Using Sloshing Liquid Damper

  • Cho, Il-Hyoung (Department of Ocean System Engineering, Jeju National University)
  • 투고 : 2018.12.12
  • 심사 : 2019.04.11
  • 발행 : 2019.04.30
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초록

The interaction between a sloshing liquid damper (SLD) tank and a rectangular pontoon was investigated under the assumption of the linear potential theory. The eigenfunction expansion method was used not only for the sloshing problem in the SLD tank but also for analyzing the motion responses of a rectangular pontoon in waves. If the frictional damping due to the viscosity of the SLD tank was ignored, the effect of the SLD appeared to be an added mass in the coupled equation of motion. The installation of the SLD tank had a greater effect on the roll motion response than the sway and heave motion of the pontoon. One resonance peak for rolling motion showed up in the case of a frozen liquid in the SLD tank. However, if liquid motion in the SLD tank was allowed, two peaks appeared around the first natural frequency of the fluid in the SLD tank. In particular, the peak value located in the low-frequency region had a relatively large value, and the peak frequency located in the high-frequency region moved into the high-frequency region as the depth of the liquid in the tank increased.

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참고문헌

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