지식기반 3D 통합모델링을 활용한 모바일하버 시뮬레이션 플랫폼

이승신(Seungsin Lee),서효원(Hyowon Suh) (사)한국CDE학회 2010 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2010 No.1

Mobile harbor is a novel type harbor system that can be moved out to the outside of general harbor to allow large container ships to unload cargo without having to come into port. The mobile harbor system is developed to reduce the time ships are required to remain at harbor and to build harbors capable of receiving large ships regardless of depth and tides. However, the mobile harbor consists of many complex components such as stabilized crane system at the sea, transfer unit, high speed container handing system at the quay, etc. and they must be evaluated as a integrated system for optimal construction of the mobile harbor. In this paper, efficiently integrated 3D simulation platform for mobile harbor is developed with Siemens NX and Plant Simulation which are well known general purpose PLM software, for evaluation of the various performances of the mobile harbor. To show effectiveness of the developed simulation platform, the one feasible arrangement of the mobile harbor from various alternatives is selected and simulation result is carried out. The simulation result shows that the developed simulation platform can be adopted to evaluate performances of the mobile harbor.

모바일하버(Mobile Harbor)의 가치와 활용방안에 대한 연구 - 연안운송 중심으로 -

신창훈,정수현,박수남 한국항해항만학회 2010 한국항해항만학회지 Vol.34 No.3

As container traffic is increasing, the introduction of mega-vessel has had a significant impact on the ports and terminals business. This movement of container shipping has led to intensely competitive environment among ports, so substantial pressures to develop new container ports or to expand existing ones, have been grown. However, it requires a huge investment, especially cost and time, to overcome environmental, geographical and financial restrictions generated from developing a port. This study addressed the Mobile Harbor, the new concept of marine logistics system as an alternative strategy. We performed an economic analysis on the introduction of the Mobile Harbor in coastal transport sector and also a sensitivity analysis to examine the effects of changing factors related on the economic evaluation. We have examined the value and application of Mobile Harbor as a preliminary study, which may contribute to further studies on the Mobile Harbor. 컨테이너 물동량 증가와 함께 선박의 대형화는 항만과 터미널 운영에 많은 영향을 주었고, 선사들의 운송네트워크들은 점차 hub-and-spoke방식으로 변하고 있다. 이는 항만간 치열한 경쟁을 초래하였고 그로 인해 새로운 항만을 개발하거나 기존 항만을 확장해야 하는 압력들을 받아왔다. 그러나 항만 개발에 따른 환경적·물리적·재무적 한계를 극복하기에는 너무나 많은 비용과 시간의 투자를 요구하고 있다. 그래서 본 연구에서는 하나의 대안으로서 새로운 해상 운송시스템인 모바일하버를 다루었다. 그리고 컨테이너 연안운송시장을 중심으로 모바일하버 도입에 대한 경제적 분석과 함께 관련 요인들의 변화들에 대한 민감도 분석도 같이 수행하였다. 본 연구는 모바일하버의 가치와 활용방안에 대한 기초 연구로서 추후 관련 연구들에 대해 기여하고자 하였다.

구조최적설계 기법을 이용한 모바일하버용 크레인의 설계

임원종(Won-Jong Lim),정의진(Ui-Jin Jung),정성범(Seong-Beom Jeong),이재준(Jae-Jun Lee),박경진(Gyung-Jin Park) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11

Recently, the container ships become fairly large so that the shipping capability is more than 10,000TED. Accordingly, very large ports are required and building such ports is extremely expensive. For this reason the mobile harbor concept has been proposed. The mobile harbor, which is located in a shallow sea, can replace a port that has insufficient infrastructure. Also, this system can alleviate congestion in the ports. The mobile harbor is a small container ship which has a container crane on it. The mobile harbor is a new innovative concept for moving containers from containership to a mobile harbor or vice versa. One of the most important basic technologies is the design of a crane structure for the mobile harbor. The crane for the mobile harbor is different from the conventional cranes on the ground. Stability is guaranteed on the ground, but is not so in the sea. This study examines structural optimization of the crane structure on the mobile harbor. The position of the boom of the crane is optimized as well. The design process considers the rolling and pitching conditions of the sea state and the wind force regulations from Korean Register of Shipping. Optimization problems are formulated to minimize the weight while various design conditions are satisfied, and the formulated problems are solved by a commercial software system called GENESIS.

Mobile harbor: structural dynamic response of RORI crane to wave-induced rolling excitation

Cho, Jin-Rae,Han, Ki-Chul,Hwang, Soon-Wook,Cho, Choon-Soo,Lim, O-Kaung Techno-Press 2012 Structural Engineering and Mechanics, An Int'l Jou Vol.43 No.5

A new concept sea-floating port called mobile harbor has been introduced, in order to resolve the limitation of current above-ground port facilities against the continuous growth of worldwide marine transportation. One of important subjects in the design of a mobile harbor is to secure the dynamic stability against wave-induced excitation, because a relatively large-scale heavy crane system installed at the top of mobile harbor should load/unload containers at sea under the sea state up to level 3. In this context, this paper addresses a two-step sequential analytical-numerical method for analyzing the structural dynamic response of the mobile harbor crane system to the wave-induced rolling excitation. The rigid ship motion of mobile harbor by wave is analytically solved, and the flexible dynamic response of the crane system by the rigid ship motion is analyzed by the finite element method. The hydrodynamic effect between sea water and mobile harbor is reflected by means of the added moment of inertia.

Mobile harbor: structural dynamic response of RORI crane to wave-induced rolling excitation

조진래,Ki-Chul Han,Soon-Wook Hwang,Choon-Soo Cho,임오강 국제구조공학회 2012 Structural Engineering and Mechanics, An Int'l Jou Vol.43 No.5

A new concept sea-floating port called mobile harbor has been introduced, in order to resolve the limitation of current above-ground port facilities against the continuous growth of worldwide marine transportation. One of important subjects in the design of a mobile harbor is to secure the dynamic stability against wave-induced excitation, because a relatively large-scale heavy crane system installed at the top of mobile harbor should load/unload containers at sea under the sea state up to level 3. In this context, this paper addresses a two-step sequential analytical-numerical method for analyzing the structural dynamic response of the mobile harbor crane system to the wave-induced rolling excitation. The rigid ship motion of mobile harbor by wave is analytically solved, and the flexible dynamic response of the crane system by the rigid ship motion is analyzed by the finite element method. The hydrodynamic effect between sea water and mobile harbor is reflected by means of the added moment of inertia.

모바일하버용 컨테이너 자동 하역 장치의 레일-이탈 방지 모듈 설계

천희준(Heejun Chun),이재훈(Jae-Hoon Lee),이재철(Jaecheol Lee),박성훈(Seonghun Park) (사)한국CDE학회 2010 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2010 No.1

An automated container-stacking system(ACSS) for Mobile Harbor functions to arrange and stack containers loaded to Mobile Harbor from a container ship through the main crane of Mobile Harbor. The current paper focuses on the design of an anti-derail module in the ACSS of Mobile Harbor, and the anti-derail module consists of three driving components and an anti-derail component. Finite element analysis (FEA) of three driving components exhibited that the largest von Mises stresses occurred around the connecting hole between the three components of the anti-derail module. The values of maximum von Mises stresses for the three main components were 210MPa, 165MPa, 78MPa, respectively, which were lower than the allowable stress of a SM490Y material (243MPa). The allowable stress was computed from the yield stress of a SM490Y material (365MPa) divided by a factor of safety (1.5). Future plan is to change the design of this component to decrease the maximum stress less than the allowable stress, and further to perform FEA by considering the maximum dynamic load applied to the anti-derail device.

Hydrodynamic interactions and coupled dynamics between a container ship and multiple mobile harbors

Kang, H.Y.,Kim, M.H. Techno-Press 2012 Ocean systems engineering Vol.2 No.3

As the size of container ships continues to increase, not many existing harbors can host the super-container ship due to its increased draft and the corresponding dredging requires huge budget. In addition, the minimization of waiting and loading/offloading time is the most important factor in harbor competitiveness. In this regard, mobile-harbor concept has been developed in Korea to achieve much improved harbor capacity and efficiency. In developing the concept, one of the most important elements is the operability of crane between two or more floating bodies in side-by-side arrangement. The container ship is to be stationed through a hawser connection to an outside-harbor fixed-pile station with the depth allowing its large draft. The mobile harbors with smart cranes are berthed to the sides of its hull for loading/offloading containers and transportation. For successful operation, the relative motions between the two or more floating bodies with hawser/fender connections have to be within allowable range. Therefore, the reliable prediction of the relative motions of the multiple floating bodies with realistic mooring system is essential to find the best hull particulars, hawser/mooring/fender arrangement, and crane/docking-station design. Time-domain multi-hull-mooring coupled dynamic analysis program is used to assess the hydrodynamic interactions among the multiple floating bodies and the global performance of the system. Both collinear and non-collinear wind-wave-current environments are applied to the system. It is found that the non-collinear case can equally be functional in dynamics view compared to the collinear case but undesirable phenomena associated with vessel responses and hawser tensions can also happen at certain conditions, so more care needs to be taken.

모바일 하버 서비스 관리 시스템

이훈(Hoon Lee) 한국통신학회 2011 韓國通信學會論文誌 Vol.34 No.9

최근에 들어서 얕은 바다에서 대형 선박의 하역을 손쉽게 처리하기 위한 모바일 하버의 도입에 대한 논의와 연구가 활발히 진행되고 있다. 이에 본 연구에서는 대형 선박이 정박할 수 없는 얕은 바다에서도 화물을 싣고 내릴 수 있는 이동형 부두 시스템인 모바일 하버에 대하여 선박의 도착에서 하적에 이르기까지의 서비스를 자동으로 관리하는 모바일 하버 서비스 관리 시스템을 개발하였다. 이를 위하여 먼저 최근에 등장한 새로운 개념인 모바일 하버의 동작 원리를 정의하고 모바일 하버와 대형 선박의 행동 특성함수를 정의하였다. 이어서 모바일 하버와 서비스 관리 시스템이 정보를 주고받는 과정을 정의하고 그에 따른 기능을 시뮬레이터로 구현하였다. 마지막으로 개발한 시뮬레이터를 이용한 모의실험을 통하여 제안한 방법의 유효성을 제시하였다. Recently, we could witness research works on the development of mobile harbor. In line with the implementation of the physical entity for the mobile harbor system, there exists a need for the development of the service management system for the mobile harbor. In this work we propose a framework for the mobile harbor service management system. To that purpose, we first define the principle for the operation of the mobile harbor service management system. Also we develop the mobile harbor service management system by simulation. Finally, we illustrate the implication of the research by experiments.

Axiomatic design study for automatic ship-to-ship mooring system for container operations in open sea

Kim, Yong Yook,Choi, Kook-Jin,Chung, Hyun,Lee, Phill-Seung Techno-Press 2011 Ocean systems engineering Vol.1 No.2

To provide more rational design solutions at conceptual design level, axiomatic design method has been applied to solve critical part of a new engineering problem called Mobile Harbor. In the implementation, the Mobile Harbor, a functional harbor system that consists of a vessel with container crane approaches to a container ship anchored in the open sea and establishes a secure mooring between the two vessels to carry out loading and unloading of containers. For this moving harbor system to be able to operate successfully, a reliable and safe strategy to moor and maintain constant distance between the two vessels in winds and waves is required. The design process of automatic ship-to-ship mooring system to satisfy the requirements of establishing and maintaining secure mooring has been managed using axiomatic design principles. Properly defining and disseminating Functional Requirements, clarifying interface requirements between its subsystems, and identifying potential conflict, i.e. functional coupling, at the earliest stage of design as much as possible are all part of what need to be managed in a system design project. In this paper, we discuss the automatic docking system design project under the umbrella of KAIST mobile harbor project to illustrate how the Axiomatic Design process can facilitate design projects for a large and complex engineering system. The solidified design is presented as a result.

250 TEU급 모바일하버를 위한 횡동요 저감 장치의 개념 설계 연구

정태영(Chung, T.Y.),문석준(Moon, S.J.),류재문(Lew,, J.M.),박철훈(Park, C.H.),조한욱(Cho, H.W.),김병인(Kim, B.I.),윤현규(Yoon, H.K.),강주년(Kang, J.Y.) 한국소음진동공학회 2010 한국소음진동공학회 논문집 Vol.20 No.7

A Mobile Harbor is a new transportation platform which can load and unload has containers to and from very large container ships on the sea. Currently designed Mobile Harbor a catamaran type which is equipped with precisely controlled gantry crane on the deck, and can transport 250 TEUs at a time. Loading and unloading works by crane require very small motion of Mobile Harbor in waves, because it may be operated outside of harbors. In this project, applicability of both tuned-type anti-rolling tank and maglev-type active mass driver is studied as anti-rolling systems.