POLYAMOOR

Durable and flexible polyamide moorings for offshore renewable energies

Duration: 46 months (2017 - 2020)

Context

Mooring systems used for floating wind turbines differ significantly from those used in the oil & gas sector due to elevated dynamics in shallow waters. The challenge is to be able to maintain a floater in an extreme environment by limiting the forces transmitted by the mooring lines as well as limiting the maximum offset of the floater to which the export cable is connected. One envisaged solution is to use nylon mooring lines capable of absorbing the involved forces but whose behaviour is highly non-linear and poorly understood in cases of long service life.

Objective

To precisely characterise the dynamic, long term behaviour of nylon mooring lines.

Scientific and technical contents

  • Determination of dominant factors leading to mooring line end-of-life and definition of an optimised line design.
  • Experimental campaigns to study the line’s fatigue behaviour and creep response.
  • Establishment of an experimental method to rapidly characterise the fatigue lifespan of polyamide lines.
  • Determination of the fatigue criterion and construction of the behaviour law for mooring lines.

Resources

Project sheet (PDF)

Partners and funding

This project is led by Naval Energies and France Energies Marines.

The total project budget is €824K.

This project receives funding from France Energies Marines and its members and partners, as well as French State funding managed by the National Research Agency under the Investments for the Future Programme (ANR-10-IEED-0006-16).

Photo credit: Ifremer

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