objectives

Deliverables

• A new generation subsea inter‐array cable with improved fatigue properties. The new subsea inter‐array cable will retain the attractive features of the present generation cable, including its competiveness compared to alternative solutions. The improvement of the new cable is obtained by corrugated aluminium sheathing, which will reduce the bending stiffness as well as the stress levels under cyclic loading. The modern design of thecable allow for rapid offshore installation and repair, without the complications of ‘dirty tar’ or other difficult to handle materials. The cable will be produced in long length up to several hundreds of kilometres for up to 66 kV application.
• The project will fill in the knowledge gaps for design life prediction for free spanning subsea electrical cables in exposed offshore dynamic application. Although the technology exists in principle (e.g. in Orcaflex or Shear7), the large uncertainties prevents the potential cost saving that can be achieved for the electrical cables. The main knowledge gaps that will be addressed in the project are: more accurate dynamic response calculations in the time domain, more accurate VIV predictions and industry qualified fatigue resistance tests for the electrical cable. The project aims at achieving TRL 5‐7, which is substantially above current TRL 3‐5.

Activities and planning