Recently, several problems have occurred in the space, infra-structure, and facility of the contiguity of existing harbors due to the trend of enlarged container vessels. In this regard, the Mobile Harbor has been proposed conceptually in this study as an effective solution for these problems. The c...
Recently, several problems have occurred in the space, infra-structure, and facility of the contiguity of existing harbors due to the trend of enlarged container vessels. In this regard, the Mobile Harbor has been proposed conceptually in this study as an effective solution for these problems. The concept is that of a transfer loader that transfers containers from a large container ship to the harbor on land, and is a catamaran type floating barge. The catamaran-type vessel is well known for its advantage in maneuverability, resistance, and effectiveness for working on board. For the safe and effective operation of the two floating bodies (a container ship and the mobile harbor in the near sea detached from the quay), robot arms, novel crane systems, and pneumatic fenders are specially devised with an additional mooring facility or DP (dynamic positioning) system. In this study, this concept is to be verified through comparison and simulation studies under various environmental conditions. It is shown that the proposed concept is in general feasible but there are several areas for further investigation and improvement.
Recently, several problems have occurred in the space, infra-structure, and facility of the contiguity of existing harbors due to the trend of enlarged container vessels. In this regard, the Mobile Harbor has been proposed conceptually in this study as an effective solution for these problems. The concept is that of a transfer loader that transfers containers from a large container ship to the harbor on land, and is a catamaran type floating barge. The catamaran-type vessel is well known for its advantage in maneuverability, resistance, and effectiveness for working on board. For the safe and effective operation of the two floating bodies (a container ship and the mobile harbor in the near sea detached from the quay), robot arms, novel crane systems, and pneumatic fenders are specially devised with an additional mooring facility or DP (dynamic positioning) system. In this study, this concept is to be verified through comparison and simulation studies under various environmental conditions. It is shown that the proposed concept is in general feasible but there are several areas for further investigation and improvement.
* AI 자동 식별 결과로 적합하지 않은 문장이 있을 수 있으니, 이용에 유의하시기 바랍니다.
제안 방법
In this study, hydrodynamic and mooring analyses are performed for two side-by-side ships moored offshore (including the effects of multi-body interactions, the robot arms, mooring lines, and the fenders/hawsers) to verify whether the concept is feasible and to check the levels of dynamic motionsand the mooring forces under the various combinations of possible winds, waves, and current. Through this study, the concepts of the mooring devices and the analyzing parameters for container cranes could be delivered as useful design information.
In this study, the dynamic analyses of the 5,000TEU container ship and the mobile harbor in a side-by-side arrangement are conducted, considering the two-body interaction effects under various environmental conditions of sea state 3. In this study, the effects of the robot arms that cling to the side shell plate of the larger container ship and fenders/hawsers which are placed in the gap are compared.
In this study, the dynamic analyses of the 5,000TEU container ship and the mobile harbor in a side-by-side arrangement are conducted, considering the two-body interaction effects under various environmental conditions of sea state 3. In this study, the effects of the robot arms that cling to the side shell plate of the larger container ship and fenders/hawsers which are placed in the gap are compared.
As an effective solution to this type of problem, a mobile harbor as a midway loader is proposed in this study. The concept is that the container ships are anchored in the near shore outside the breakwater, and the mobile harbor will approach the container ships for docking in aside-by-side arrangement. Then, the containers are disembarked/embarked from the container ship to the loader and vice versa.
대상 데이터
In this study, the subjected vessels are selected as a 5,000 TEU container ship and the mobile harbor with a catamaran type hull form. For the selection, the capacities, the restoring capabilities, global performance, maneuvera-bilties, and the structural safety are considered.
이론/모형
The hydrodynamic coefficients are calcu-lated by using the 3D diffraction/radiation panel program WAMIT (Lee, 2006). The hydrodynamic forces are calculated for head sea and two quartering sea conditions.
후속연구
In more realistic conditions with robot arms and fenders/hawsers, it is revealed that the roll and pitch motions are controlled within the allowable limit to ensure the crane operation of the mobile harbor. However, more studies need to be carried out for a more desirable connection method between the two floating bodies to minimize the surge and yaw motions of the mobile harbor.
참고문헌 (9)
API RP 2T, Recommended Practice for Plan-ning, Designing, and Consulting Tension Leg Platforms, 2nd Edition, American Petroleum Institute, N.W., Washington D.C. (1997).
Bhattacharyya, R., Dynamics of Marine Vehicles, Wiley & Sons, USA, (1978).
Kim, M. H., Winpost User's Manual, 3rd ed., Texas A&M University, College Station, USA, (2000).
Kim, Y. B., Kim, M. H., Hull/Mooring/Riser Coupled Dynamic Analysis of a Turret-Moored FPSO Compared with OTRC Experiment, J. of Ship and Ocean Technology, v.8, no.3, (2004) pp.26-39.
Kim, Y. B., Kim, M. H., Dynamic Analysis of Multiple-Body Floating Platforms Coupled with Mooring Lines and Risers, J. of Ship and Ocean Technology, v.9, no.1, (2005) pp.11-26.
Kwak, H. U., Choi, H. S., Shin, H. S., A Motion Analysis of FPSO in Irregular Waves including Swells , J. of Ship and Ocean Technology, v.9, no.2, (2005) pp.21-28.
Lee, C. H., WAMIT User's Manual, Ver. 6.4, WAMIT, Inc, MA, USA, (2006).
OCIMF, Prediction of Wind and Current Loads on VLCCs, 2nd Edition, Witherby & Co. Ltd, London, England, (1994).
Wichers, J.E.W., A Simulation Model for a Single Point Moored Tanker, Ph.D. Dissertation, Delft University of Technology, Delft, The Netherlands, (1988).
※ AI-Helper는 부적절한 답변을 할 수 있습니다.