TetraSpar | Photo by Shell


MoniMoor JIP


The MoniMoor initiative seeks to develop a framework for the mooring integrity management of floating wind turbines and production systems with the aim of reducing operation & maintenance costs, supporting lifetime extension and increasing safety.


Floating wind turbines and production systems are designed to remain on station for a prolonged period of time. They are equipped with permanent mooring systems to ensure the station keeping ability of these floaters. Performing integrity management on the mooring system is crucial, but not straightforward. Despite the fact that mooring systems have a very good safety record and undergo periodical underwater inspections, unexpected failures still happen. Fatigue is an important failure mechanism.


The first objective is to improve mooring design and reduce the likelihood of failures through increased knowledge and understanding of fatigue mooring loads. For this purpose, the various integrity management tools developed in recent years within Joint Industry Projects for the oil & gas industry (such as MONITAS and aNySIM onboard) will be integrated into a framework for dedicated in-depth analyses. The key concept is to combine different types of information, including various sources of in-site data such as wave data, wind data, motion response and mooring loads, with design data such as numerical models to address mooring load challenges.


Pieter Aalberts p.j.aalberts@marin.nl


By combining multiple data sources and the knowledge of an experienced JIP consortium, a more reliable assessment of the load history and the condition of the moorings can be made. This information can then


be used in the decision-making process of the mooring integrity management plan.


The second objective regards the development of a floating wind specific, low-cost mooring tension monitoring system. This system runs in the cloud and uses motion and position measurements coupled to numerical models to infer mooring tension in (near) real-time. The goal here is to enable large-scale mooring monitoring without the need to install expensive and often unreliable mooring load cells.


Led by MARIN, MoniMoor, will be carried out in cooperation with representatives from the floating wind and oil & gas industry including owners, operators, suppliers and classification societies. The kick-off meeting is scheduled during the coming BlueWeek & FPSO JIP Week in June 2022. www.marin.nl/jips/monimoor


Integrity management tools • www.marin.nl/jips/monitas • www.marin.nl/anysim


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