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Abstract The block erection operations in the shipyards generally include block lifting, transporting, turn-over, and lowering procedure. During the operation, there are potential risks such as interferences with wire ropes, overweight, etc., which can lead to serious accidents. To check such risks in advance, the physics-based simulations are often required before the actual operation. For this, detailed modeling of the equipment and the operation is necessary to reflect the actual situation accurately, which is impossible with conventional modeling methods. Meanwhile, in the actual operation, the position and the orientation of the block should also be precisely controlled to avoid any risks. However, the actual operations are performed manually by the operator, and the cranes used for the erection of the block consist of complex equipment, which makes them difficult to control.
In this study, the detailed modeling of the operation situation and the equipment are introduced for accurate simulation. Then, the control method of the crane is suggested for accurate and efficient control. Firstly, the block turn-over operation by one offshore floating crane (simply, floating crane) and two crawler cranes is simulated considering the interferences between wire ropes and the block. For this, the interaction model between wire rope and the block including contact and friction is suggested. Then, the contact forces exerted on the block are calculated. Secondly, the block lifting by the floating crane is analyzed considering the coupling motion of the floating crane and the mooring system. The interaction among the floating crane, the mooring line, and the seabed is introduced under the various sea condition. Lastly, the control of the floating crane is performed for block lifting, transporting, and turn-over operation. As the floating crane consists of complicated equipment such as booms, equalizers and wire ropes, the control theory of the underactuated mechanical system is adopted. To evaluate the effectiveness and applicability of the proposed method, it was applied to the dynamic analysis of various kinds of block erection operations by using the floating crane. As a result, the proposed method could reflect the actual operation situation properly, and the block was controlled to the desired trajectory.
Publication Date 2020-08-05

Hye-Won Lee, Myung-Il Roh, Seung-Ho Ham, "Method for the Accurate and Automatic Operation of Offshore Floating Cranes for the Block Erection in Shipyards", Proceedings of OMAE(International Conference on Ocean, Offshore and Arctic Engineering) 2020, Held in Virtual Conference, 2020.08.03-07


List of Articles
번호 분류 제목 Publication Date
121 International Conference Sung-Kyoon Kim, Sol Ha, Seun-Ho Ham, Myung-Il Roh, "Optimal Layout Method for Offshore Plant Topside Considering the Safey, Operability and Maintanability", Proceedings of IMDC 2015, Tokyo, Japan, 2015.5.11-14 file 2015-05-12
120 International Conference Sung-Jun Lee, Myung-Il Roh, Min-Jae Oh, Youngsoo Seok, Won-Jae Lee, June-Beom Lee, Hyun Soo Kim, "Image-based Object Detection and Tracking Method for Ship Navigation," Proceedings of ICCAS 2019, Rotterdam, Netherlands, pp. 89-92, 2019.09.24-26 file 2019-09-24
119 International Conference Sung-Jun Lee, Myung-Il Roh, Hye-Won Lee, Jisang Ha, Il-Guk Woo, "Image-based Ship Detection and Classification for Unmanned Surface Vehicle Using Real-Time Object Detection Neural Networks", Proceedings of ISOPE 2018, Sapporo, Japan, 2018.06.10-15 file 2018-06-13
118 International Conference Sun-Kyung Jung, Myung-Il Roh, Seung-Min Lee, Ki-Su Kim, "Optimal Arrangement Method for Naval Surface Ship Considering the Stability, Operability, and Survivability", Proceedings of ICCAS 2017, Singapore, Singapore, 2017.09.26-28 file 2017-09-26
117 International Conference Sol Ha, Seung-Ho Ham, Myung-Il Roh, "Dynamic Route Guidance for Evacuation, Escape and Rescue System at an Offshore Platform Considering Real-time Hazard Avoidance", Proceedings of the 28th Asian-Pacific TEAM 2014, Istanbul, Turkey file 2014-10-15
116 International Conference Sol Ha, Namkug Ku, Myung-Il Roh, Ju-Hwan Cha, "Reliability Analysis Method Using Dynamic Reliability Block Diagram Based on DEVS Formalism," Proceedings of the 13th International Conference on Systems Simulation(AsiaSim 2013), Singapore, pp. 219-230, 2013.11.06-08. file 2013-11-06
115 International Conference Sol Ha, Nam-Kug Ku, Myung-Il Roh, Xing Li, "Evacuation, Escape and Rescue EER Analysis of Offshore Plant Based on Human Behavior Model", Proceedings of OMAE 2014, San Francisco, USA, pp. 1-7, 2014.06.08-13 file 2014-06-10
114 International Conference Sol Ha, Nam-Kug Ku, Myung-Il Roh, Ki-Su Kim, Seung-Ho Ham, Xing Li, Jung-Woo Hong, Hye-Won Lee, "DEVS-based Scenario Manager of Multibody Dynamics Simulator for Shipbuilding Production Process (WIP)", Proceedings of Spring Simulation Multi-Conference 2014, Tampa, USA, pp. 358-363, 2014.04.13-16 file 2014-04-16
113 International Conference Sol Ha, Nam-Kug Ku, Myung-Il Roh, "Ontological Modeling and Process Simulation of LNG FPSO Liquefaction Cycle based on DEVS Formalism", Proceedings of ISOPE(International Society of Offshore and Polar Engineers) 2013, Alaska, USA, pp. 950-958, 2013.06.30-07.05 file 2013-06-30
112 International Conference Sol Ha, Ki-Su Kim, Seung-Ho Ham, Myung-Il Roh, Nam-Kug Ku, "Co-simulation of Multibody System Dynamics and Moving Particle Semi-implicit Method for Heavy Load Lifting Operations in Shipyards", Proceedings of ISOPE 2015, Hawaii, USA, 2015.06.21-26 file 2015-06-25
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