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규칙파 중 플로팅 도크의 운동응답특성 및 계류장력 추정

Prediction on Mooring Tension & Motion Response Characteristics of a Floating Dock in Regular Waves

  • 오영철 (목포해양대학교 대학원 해양시스템공학과) ;
  • 김옥석 (목포해양대학교 해양공과대학 조선해양공학과) ;
  • 고재용 (목포해양대학교 해양공과대학 조선해양공학과)
  • Oh, Young-Cheol (Dep. of Ocean System Engineering, Graduate School, MMU) ;
  • Gim, Ok-Sok (Dep. of Naval Architecture & Ocean Engineering, College of Marine Technology, MMU) ;
  • Ko, Jae-Yong (Dep. of Naval Architecture & Ocean Engineering, College of Marine Technology, MMU)
  • 투고 : 2013.02.26
  • 심사 : 2013.04.25
  • 발행 : 2013.04.30

초록

이 연구에서는 상용코드(AQWA)를 이용하여 규칙파 중 8점 계류 중인 플로팅 도크의 계류 장력과 운동응답특성을 고찰하였다. 연구의 목적을 달성하기 위해 수심 10 m 연안환경(파 진폭 1.05 m, 파주기 3.85 sec, 풍속 20.21 m/s, 풍향 및 조류방향 $90^{\circ}$, 입사파 ${\chi}=180^{\circ}$, $135^{\circ}$$90^{\circ}$ 조건에서 수치 해를 적용하였다. 해석모델은 길이 140 m, 폭 32 m 및 높이 14.6 m의 강구조물로 현수선의 길이는 최대 120 m를 적용하였다. 해석결과 상하동요와 종동요는 선수파 보다 횡파에서 크게 나타났으며 계류 장력도 횡파와 풍하중에 의해 크게 작용하였다.

The paper was investigated on the mooring forces(or tension) and motion response characteristics for a 8-point mooring floating dock in regular waves using a commercial code(AQWA). To achieve the aim of the research, a numerical simulation was adapted on an inner port environment condition, which the water depth is 10 meters, significant wave amplitude(1.05 m). wave period(3.85 sec), wind speed(20.21 m/s), wind and current direction ($90^{\circ}$), incident waves(${\chi}=180^{\circ}$, $135^{\circ}$ and $90^{\circ}$). The dimension of the numerical model is length(140 m), breadth(32 m), depth(14.6 m). The maximum length of a mooring line is 120m. We can expected that roll and pitch motions appeared in beam seas better than head sea. the mooring forces also indicated higher in bean seas than in head seas including wind forces.

키워드

참고문헌

  1. ANSYS, Inc.(2010), AQWA User's manual. pp. 1-84.
  2. Han, Seung-Jae, In-Cheol Kim, Dea-Kyun Oh, Gyoung-Woo Lee and Ok-Sok Gim(2012), Longitudinal Motion Analysis in Multi-Directional Irregular Waves for a Training Ship using Commercial Code, Journal of the Korean Society of Marine Environment & Safety, Vol. 18, No. 6, pp. 577-583. https://doi.org/10.7837/kosomes.2012.18.2.153
  3. Koh, Hyeok-Jun and Il-Hyoung Cho(2010), Analysis of Motion Response on Tension Leg Type Automatic Feeding System in Waves, The Korean Association of Ocean Science and Technology Societies, 2010 Conference, pp. 2504-2507
  4. Oh, Young-Cheol, Ok-Sok Gim and Jae-Yong Ko(2012), Hydrodynamic-Structural Response Coupling Analysis to a Rectangle Floating Structures, Journal of the Korean Society of Marine Environment & Safety, Vol. 18, No. 6, pp. 577-583. https://doi.org/10.7837/kosomes.2012.18.6.577
  5. Sohn, Kyoung-Ho(1998), Ocean waves, hyosung Press. pp. 1-106.
  6. Yum, Deuk-Joon(2010), Dynamics of Marine Structure, Ulsan University Press. pp. 1-112.

피인용 문헌

  1. A Study on the Characteristics of Vertical Motions due to Changes of Submerged Shape in the Multi-Purpose Small Floating Body vol.28, pp.4, 2016, https://doi.org/10.13000/JFMSE.2016.28.4.1024
  2. 초대형 부유식 해양구조물 탑재 플로팅 도크 계류안전성 연구 vol.52, pp.6, 2013, https://doi.org/10.3744/snak.2015.52.6.509