A mooring arrangement optimisation study
- Author
- Thibaut Van Zwijnsvoorde, Katrien Eloot, Marc Vantorre (UGent) and Evert Lataire (UGent)
- Organization
- Abstract
- Ports want to ensure safe and reliable loading operations for all ships. Increase in ship sizes, especially container ships, potentially cause unsafe mooring situations. For ships moored at quay walls, there is also a lack of international guidelines for mooring arrangements. This paper presents a case study for a moored containership being passed by a vessel of identical dimensions. The behaviour of the moored ship is simulated using UGent’s time-domain mooring software Vlugmoor. Starting from a well-balanced arrangement used in daily operation, three optimisation steps are presented, aiming at lowering the ship motions, which are critical. The first step explores the impact of changing line positioning to reduce line length disparity and improve efficiency in critical force directions. The second step considers a lower fore mooring deck to reduce line steepness, as well as additional winches below the bridge and funnel. The third step proposes replacing medium stiff lines with a very stiff HMPE line, combined with an elastic tail. The effect of these optimisation steps on the ship motions are presented and compared with predictions based on efficiency parameters, expressing the capacity of the configuration to deal with positive and negative surge forces. It is shown that applying these optimisation steps can significantly improve the safety of a moored container ship during a ship passage.
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Citation
Please use this url to cite or link to this publication: http://hdl.handle.net/1854/LU-8639400
- MLA
- Van Zwijnsvoorde, Thibaut, et al. “A Mooring Arrangement Optimisation Study.” 11th International Workshop on Ship and Marine Hydrodynamics (IWSH2019), Proceedings, 2019.
- APA
- Van Zwijnsvoorde, T., Eloot, K., Vantorre, M., & Lataire, E. (2019). A mooring arrangement optimisation study. 11th International Workshop on Ship and Marine Hydrodynamics (IWSH2019), Proceedings. Presented at the 11th International Workshop on Ship and Marine Hydrodynamics, Hamburg, Germany.
- Chicago author-date
- Van Zwijnsvoorde, Thibaut, Katrien Eloot, Marc Vantorre, and Evert Lataire. 2019. “A Mooring Arrangement Optimisation Study.” In 11th International Workshop on Ship and Marine Hydrodynamics (IWSH2019), Proceedings.
- Chicago author-date (all authors)
- Van Zwijnsvoorde, Thibaut, Katrien Eloot, Marc Vantorre, and Evert Lataire. 2019. “A Mooring Arrangement Optimisation Study.” In 11th International Workshop on Ship and Marine Hydrodynamics (IWSH2019), Proceedings.
- Vancouver
- 1.Van Zwijnsvoorde T, Eloot K, Vantorre M, Lataire E. A mooring arrangement optimisation study. In: 11th International Workshop on Ship and Marine Hydrodynamics (IWSH2019), Proceedings. 2019.
- IEEE
- [1]T. Van Zwijnsvoorde, K. Eloot, M. Vantorre, and E. Lataire, “A mooring arrangement optimisation study,” in 11th International Workshop on Ship and Marine Hydrodynamics (IWSH2019), Proceedings, Hamburg, Germany, 2019.
@inproceedings{8639400, abstract = {{Ports want to ensure safe and reliable loading operations for all ships. Increase in ship sizes, especially container ships, potentially cause unsafe mooring situations. For ships moored at quay walls, there is also a lack of international guidelines for mooring arrangements. This paper presents a case study for a moored containership being passed by a vessel of identical dimensions. The behaviour of the moored ship is simulated using UGent’s time-domain mooring software Vlugmoor. Starting from a well-balanced arrangement used in daily operation, three optimisation steps are presented, aiming at lowering the ship motions, which are critical. The first step explores the impact of changing line positioning to reduce line length disparity and improve efficiency in critical force directions. The second step considers a lower fore mooring deck to reduce line steepness, as well as additional winches below the bridge and funnel. The third step proposes replacing medium stiff lines with a very stiff HMPE line, combined with an elastic tail. The effect of these optimisation steps on the ship motions are presented and compared with predictions based on efficiency parameters, expressing the capacity of the configuration to deal with positive and negative surge forces. It is shown that applying these optimisation steps can significantly improve the safety of a moored container ship during a ship passage.}}, author = {{Van Zwijnsvoorde, Thibaut and Eloot, Katrien and Vantorre, Marc and Lataire, Evert}}, booktitle = {{11th International Workshop on Ship and Marine Hydrodynamics (IWSH2019), Proceedings}}, language = {{eng}}, location = {{Hamburg, Germany}}, pages = {{12}}, title = {{A mooring arrangement optimisation study}}, url = {{https://iwsh2019.fds.tu-harburg.de/}}, year = {{2019}}, }