The scope A developer had recently installed a wind farm in the East Irish Sea and found that some cables were spanning around the wind turbine towers. Fatigue assessment of the cable components had been carried out based on predicted motions. Whilst the fatigue analysis predicted that the armour windings had sucient fatigue life, our client wished to verify this assessment by validating the predicted cable motions. We were asked to develop a system to monitor the behaviour of the cables. Motion was the critical loading condition for fatigue and therefore the equipment had to be tailored to clearly dene both horizontal and vertical motion. The solution We addressed our client’s requirements by: Analysing options for monitoring the cable motions Carrying out a detailed design of the prefe

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