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Preliminary Assessment of Operational Downtime of Sea Ports and Berthing Facilities through Numerical Modelling

Journal of Shipping and Ocean Engineering 2014年第5期4卷 117-128页

作者： Md Akhtaruzzaman sarker Giang Vu Luong Alec John Sleigh Rivers Deltas & Coasts Business Line Royal Haskoning DHV Peterborough PE3 8DW United Kingdom

Downtime due to adverse wave conditions for vessels at berth is an important commercial aspect in the planning and development of a sea port or a berthing terminal. This paper describes a practical technique for preliminary assessment of operational downtime at a proposed bulk terminal. Time-series wind and wave data at an offshore location was purchased. Numerical modelling was then carried out using the MIKE21 sw （spectral wave） model developed by DHI （Deutsches Hydrographisches Institut） to transform these offshore waves into inshore in order to derive wave conditions at the berth. Both wind-waves and swell-waves were considered. Waves affecting the head and beam of a vessel were considered separately for a wide range of vessel sizes with DT （displacement tonnage） ranging from 5,000 tons to 〉 200,000 tons. The limiting wave height H5% was used. Operational downtime was also calculated using significant wave height, Hs as a criterion with limits ofHs = 1.0 m for beam seas and Hs = 1.5 m for head seas. The methodology and lessons learnt from the study can be applied for the development of any sea port worldwide.

关键词： Numerical modelling wave propagation wave transformation downtime port planning bulk terminal.

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Application of Numerical Modelling to Optimise Design of a Coastguard Harbour

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Journal of Shipping and Ocean Engineering 2011年第1期1卷 20-29页

作者： M.A. sarker M. Adams A. Sleigh A. Reid K. Shabibi Rightwell House Royal Haskoning Peterborough PE3 8DW United Kingdom Mina AI Fahal Royal Oman Police Muscat 111 Sultanate of Oman

As part of the design process of the Sidab Coastguard harbour in Oman, 2-dimensional wave transformation modelling was carried out to generate inshore wave conditions （outside the harbour） using the MIKE21 Spectral Wave （sw） model of DHI （Danish Hydraulic Institute）. The MIKE21 Boussinesq Wave （BW） model was then used to simulate the wave penetration so that acceptable wave conditions were achieved inside the harbour. Tide levels and currents （speeds and directions） inside and outside the harbour were simulated using the MIKE21 Hydrodynamic （HD） model. Finally, the MIKE21 model was used to simulate the flushing mechanism to ensure good water quality inside the harbour. Both the existing and proposed harbour layouts were modelled for operational and extreme conditions. The influence of cyclones on the design was also considered. An acceptable harbour layout was determined which provided good shelter from waves and with an exchange rate of water between the harbour and the sea which was high enough to prevent eutrophication and to allow removal of man-made pollutants such as accidental oil spills. The paper compares the findings of the present study with a range of internationally used guidelines on harbour flushing. Finally, the paper demonstrates the value of using numerical modelling technique in optimising the layout of a new harbour.

关键词： Numerical modelling wave propagation wave penetration tides and currents harbour flushing water quality coastguard ports and harbours.

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