Finecast of the wind at container terminals in the Port of Rotterdam
Mooring line tensions are measured by means of load cells. The measurement campaign is conducted during severe winds.
The measured wind is analysed and compared with the results of so-called ‘finecasting’; numerical simulation by LES CFD over the complete terminal area (10 x 10 km), using the global weather model as the boundary condition. The measured ship motions and mooring line tensions are compared with results from Dynamic Mooring Analysis (DMA).
Laptop tool developed All measured and computed data is processed and analysed and results are delivered to the
participating companies. The results of the Lidar wind scanner and the ‘finecasting’ method are used to derive a practical engineering model for the wind field at the terminal boundaries (2 x 2 km). This wind description model will provide a better input for engineering methods such as DMA.
Meanwhile, a computational tool has been developed to compute the wind loads on the ship, taking the neighbouring buildings, container stacks and other vessels within this 2 x 2 km into account, using the practical wind model as input. The tool is based on the WINDOS kernel software which is described in a separate article in this issue (see page 20).
The characteristics of a variety of ship types and geometries of several port locations will be implemented in the tool. This laptop tool will be verified against the advanced analysis tools such as Finecast and DMA. Finally, it will then be delivered to all participating organisations for operational use by ports and terminals, vessel operators and pilots.
New participants welcome! The WINDLASS JIP is conducted in close cooperation with 24 participating organisations including major port authorities, pilots, operators, classification societies, engineering contractors and R&D institutes.
WINDLASS started in 2019 and will be completed in 2022. Meetings are held in conjunction with the Vessel Operator Forum (
www.vesseloperatorforum.com. New participants are still welcome to join!
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