A novel flexible restraining system is proposed to protect a waterway crossing road, a railway, or a combined bridge when a powerless advancing ship approaches such a structure. Direct collision with principal bridge supports is not addressed under the assumption that the restraining system is located some distance upstream of the non-navigational bridge, assuming the ship cannot engage propulsive system in reverse to reduce the speed of ship advance. Ship-independent seabed-located gravity anchors are to be ultimately dragged to dissipate ship kinetic energy. A mathematical model of the proposed method of restraint is developed and the resulting movements of ship and anchors are predicted for two distinct ship forms. These ships' responses are investigated for initial ship velocity, angle of approach, and point of contact with restraining cable of different investigated spans in the presence and absence of a current. The theoretical simulations agree reasonably well with the related model measurements given the existence of ship sway and yaw motions are not addressed. The results are sufficient to demonstrate the applicability of the proposed system. Predictions and observations suggest that the smaller the restraining cable span and the closer the ship is located to the anchors (initially vertically below the ends of the restraining cable), the more effective is the retraining process.
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February 2017
Research-Article
A Novel Restraining System for a Powerless Advancing Ship: A Combined Theoretical and Experimental Investigation
Xu-jun Chen,
Xu-jun Chen
College of Field Engineering,
PLA University of Science and Technology,
Nanjing 210007, China;
China Ship Scientific Research Center,
Wuxi 214082, China
e-mail: chenxujun213@sina.com
PLA University of Science and Technology,
Nanjing 210007, China;
China Ship Scientific Research Center,
Wuxi 214082, China
e-mail: chenxujun213@sina.com
Search for other works by this author on:
Jun-yi Liu,
Jun-yi Liu
College of Field Engineering,
PLA University of Science and Technology,
Nanjing 210007, China;
Fluid Structure Interactions Research Group,
University of Southampton,
Southampton SO16 7QF, UK
e-mail: liujunyi_1988@outlook.com
PLA University of Science and Technology,
Nanjing 210007, China;
Fluid Structure Interactions Research Group,
University of Southampton,
Southampton SO16 7QF, UK
e-mail: liujunyi_1988@outlook.com
Search for other works by this author on:
Grant E. Hearn,
Grant E. Hearn
Fluid Structure Interactions Research Group,
University of Southampton,
Southampton SO16 7QF, UK
e-mail: g.e.hearn@soton.ac.uk
University of Southampton,
Southampton SO16 7QF, UK
e-mail: g.e.hearn@soton.ac.uk
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Ye-ping Xiong,
Ye-ping Xiong
Fluid Structure Interactions Research Group,
University of Southampton,
Southampton SO16 7QF, UK
e-mail: Y.Xiong@soton.ac.uk
University of Southampton,
Southampton SO16 7QF, UK
e-mail: Y.Xiong@soton.ac.uk
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Guang-huai Wu
Guang-huai Wu
College of Field Engineering,
PLA University of Science and Technology,
Nanjing 210007, China
e-mail: gh-wu@sohu.com
PLA University of Science and Technology,
Nanjing 210007, China
e-mail: gh-wu@sohu.com
Search for other works by this author on:
Xu-jun Chen
College of Field Engineering,
PLA University of Science and Technology,
Nanjing 210007, China;
China Ship Scientific Research Center,
Wuxi 214082, China
e-mail: chenxujun213@sina.com
PLA University of Science and Technology,
Nanjing 210007, China;
China Ship Scientific Research Center,
Wuxi 214082, China
e-mail: chenxujun213@sina.com
Jun-yi Liu
College of Field Engineering,
PLA University of Science and Technology,
Nanjing 210007, China;
Fluid Structure Interactions Research Group,
University of Southampton,
Southampton SO16 7QF, UK
e-mail: liujunyi_1988@outlook.com
PLA University of Science and Technology,
Nanjing 210007, China;
Fluid Structure Interactions Research Group,
University of Southampton,
Southampton SO16 7QF, UK
e-mail: liujunyi_1988@outlook.com
Grant E. Hearn
Fluid Structure Interactions Research Group,
University of Southampton,
Southampton SO16 7QF, UK
e-mail: g.e.hearn@soton.ac.uk
University of Southampton,
Southampton SO16 7QF, UK
e-mail: g.e.hearn@soton.ac.uk
Ye-ping Xiong
Fluid Structure Interactions Research Group,
University of Southampton,
Southampton SO16 7QF, UK
e-mail: Y.Xiong@soton.ac.uk
University of Southampton,
Southampton SO16 7QF, UK
e-mail: Y.Xiong@soton.ac.uk
Guang-huai Wu
College of Field Engineering,
PLA University of Science and Technology,
Nanjing 210007, China
e-mail: gh-wu@sohu.com
PLA University of Science and Technology,
Nanjing 210007, China
e-mail: gh-wu@sohu.com
1Corresponding author.
Contributed by the Ocean, Offshore, and Arctic Engineering Division of ASME for publication in the JOURNAL OF OFFSHORE MECHANICS AND ARCTIC ENGINEERING. Manuscript received February 5, 2016; final manuscript received August 21, 2016; published online November 29, 2016. Assoc. Editor: Ron Riggs.
J. Offshore Mech. Arct. Eng. Feb 2017, 139(1): 011103 (14 pages)
Published Online: November 29, 2016
Article history
Received:
February 5, 2016
Revised:
August 21, 2016
Citation
Chen, X., Liu, J., Hearn, G. E., Xiong, Y., and Wu, G. (November 29, 2016). "A Novel Restraining System for a Powerless Advancing Ship: A Combined Theoretical and Experimental Investigation." ASME. J. Offshore Mech. Arct. Eng. February 2017; 139(1): 011103. https://doi.org/10.1115/1.4034821
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