Synthetic mooring ropes for marine renewable energy applications

Synthetic mooring ropes have a proven track record of use in harsh operating conditions over the past two decades. As one of the main users of ropes for permanent mooring systems, the oil and gas industry has opted for these components because they possess performance characteristics and economies of scale which are in many respects superior to steel components. Given this accrued experience, it is unsurprising that several marine renewable energy (MRE) device developers have utilised synthetic ropes, motivated by the need to specify economical, reliable and durable mooring systems. Whilst these components are potentially an enabling technology for the MRE sector, this is a new field of application which can feature highly dynamic mooring tensions and consequently existing certification practices may not be directly applicable. Based on the expertise of the authors, this paper provides a state-of-the-art overview of synthetic ropes in the context of MRE mooring systems, including key information about aspects of specification (performance attributes, classification and testing) as well as application (installation, degradation, maintenance, inspection and decommissioning). It is the intention of this review to provide valuable insight for device developers who are considering using ropes in the specification of fit for purpose mooring systems.

[1]  T. Moan,et al.  Mooring system analysis of multiple wave energy converters in a farm configuration , 2009 .

[2]  P. Kirrane,et al.  Development of an Efficient Design Technique for the Optimisation of Mooring Systems for Wave Energy Arrays , 2011 .

[3]  L. Foulhoux,et al.  Testing of a Large-Diameter Polyester Rope Offshore West Africa , 1999 .

[4]  J. Hearle,et al.  Handbook of Fibre Rope Technology , 2004 .

[5]  S. Banfield,et al.  Computer Model To Predict Long-Term Performance Of Fiber Rope Mooring Lines , 2005 .

[6]  Evan H. Zimmerman,et al.  Hurricane-Resistant Mooring System—Enabling Technology Through the Use of Synthetic Ropes , 2009 .

[7]  Ming-Yao Lee,et al.  Development of API RP 2SM for Synthetic Fiber Rope Moorings , 2000 .

[8]  John Hainsworth,et al.  Acoustic-ultrasonic nondestructive evaluation of double-braided nylon ropes using the stress wave factor , 1984 .

[9]  John F. Flory,et al.  Defining, Measuring, and Calculating the Properties of Fiber Rope Deepwater Mooring Lines , 2004 .

[10]  Lars Johanning,et al.  Measurements of static and dynamic mooring line damping and their importance for floating WEC devices , 2007 .

[11]  Peter Davies,et al.  Finite element simulation of the mechanical behavior of synthetic braided ropes and validation on a tensile test , 2015 .

[12]  F. Mcgarry,et al.  The effects of sea water and concentrated salt solutions on the fatigue of nylon 6,6 fibres , 1985 .

[13]  P. Jean,et al.  Failure of Chains by Bending on Deepwater Mooring Systems , 2005 .

[14]  J Mason Angela.  An Experimental Investigation of Damaged Arresting Gear Tapes for the Langley Aircraft Landing Dynamics Facility , 1999 .

[15]  R. O. Snell,et al.  Fatigue Curves for Polyester Moorings - A State-of-the-Art Review , 2000 .

[16]  I M L Ridge,et al.  Nylon fibre rope moorings for wave energy converters , 2010, OCEANS 2010 MTS/IEEE SEATTLE.

[17]  I. Corbetta,et al.  HMPE Mooring Line Trial for Scarabeo III , 2001 .

[18]  Jeffrey Otten,et al.  Thunder Hawk Mooring Rope Particle Ingress, Break, and Fatigue Testing , 2013 .

[19]  Claes Eskilsson,et al.  Station keeping design for floating wave energy devices compared to floating offshore oil and gas platforms , 2013 .

[20]  David Nigel Parish.  A novel mooring tether for highly dynamic offshore applications , 2015 .

[21]  Nuno Fonseca,et al.  Mooring system influence on the efficiency of wave energy converters , 2013 .

[22]  Julian Wolfram,et al.  On Assessing the Reliability and Availability of Marine Energy Converters: The Problems of a New Technology , 2005 .

[23]  N. F. Casey,et al.  Durability of Polyester Deepwater Mooring Rope , 2005 .

[24]  Lars Johanning,et al.  Interaction Between Mooring Line Damping and Response Frequency as a Result of Stiffness Alteration in Surge , 2006 .

[25]  R.L.M. Bosman.  On the origin of heat build-up in polyester ropes , 1996, OCEANS 96 MTS/IEEE Conference Proceedings. The Coastal Ocean - Prospects for the 21st Century.

[26]  John Fitzgerald,et al.  Including moorings in the assessment of a generic offshore wave energy converter: A frequency domain approach , 2008 .

[27]  F.E.G. Chimisso,et al.  Modelling creep tests in HMPE fibres used in ultra-deep-sea mooring ropes , 2011 .

[28]  Andrew McLaren.  Design and Performance of Ropes for Climbing and Sailing , 2006 .

[29]  Jie Wu,et al.  Development of Time Domain Model for Synthetic Rope Mooring Systems , 2014 .

[30]  S. D. Weller,et al.  Synthetic rope responses in the context of load history: Operational performance , 2014 .

[31]  Robert Kaste,et al.  Nonlinear dynamic behavior of parachute static lines , 2003 .

[32]  Emmanuel Chailleux,et al.  Long-term mechanical behavior of aramid fibers in seawater , 2011 .

[33]  N. O'Hear.  Optical Scanning Apparatus for Ropes nondestructive test monitoring system , 2003, Oceans 2003. Celebrating the Past ... Teaming Toward the Future (IEEE Cat. No.03CH37492).

[34]  Stanley Backer,et al.  Deterioration of Synthetic Fiber Rope during Marine Usage. Appendix A. , 1981 .

[35]  Peter Davies,et al.  Tensile and creep behaviour of polyethylene terephthalate and polyethylene naphthalate fibres , 2011 .

[36]  S. D. Weller,et al.  Guidance on the use of synthetic fibre ropes for marine energy devices , 2013 .

[37]  Knut O. Ronold,et al.  New DNV Recommended Practice DNV-RP-C205 On Environmental Conditions And Environmental Loads , 2006 .

[38]  Patrice Cartraud,et al.  Analytical modeling of synthetic fiber ropes subjected to axial loads. Part I: A new continuum model for multilayered fibrous structures , 2007 .

[39]  Peter Davies,et al.  Synthetic Mooring Lines for Depths to 3000 Meters , 2002 .

[40]  C. M. Leech,et al.  Modelling heat build-up in large polyester rones , 1996 .

[41]  Emmanuel Chailleux,et al.  A Non-Linear Viscoelastic Viscoplastic Model for the Behaviour of Polyester Fibres , 2005 .

[42]  Emmanuel Chailleux,et al.  Modelling the Non-Linear Viscoelastic and Viscoplastic Behaviour of Aramid Fibre Yarns , 2003 .

[43]  Philipp R. Thies,et al.  Towards component reliability testing for marine energy converters , 2011 .

[44]  C. M. Leech,et al.  Modelling Heat Buildup In Large Polyester Ropes , 1997 .

[45]  Peter Stansby,et al.  Experimental Measurements of the Complex Motion of a Suspended Axisymmetric Floating Body in Regular and Near-Focused Waves , 2013 .

[46]  Wei Huang,et al.  Modeling nonlinear creep and recovery behaviors of synthetic fiber ropes for deepwater moorings , 2013 .

[47]  J. E. McIntyre,et al.  Synthetic fibres : nylon, polyester, acrylic, polyolefin , 2005 .

[48]  D. Barton Smith,et al.  Direct Measurement of Large Strains in Synthetic Fiber Mooring Ropes Using Polymeric Optical Fibers , 2002 .

[49]  Peter Stansby,et al.  Limiting heave response of a wave energy device by draft adjustment with upper surface immersion , 2009 .

[50]  Emmanuel Chailleux,et al.  Prediction of the long term behavior of synthetic mooring lines , 2003 .

[51]  Hongbo Shu,et al.  A Historical Review on Integrity Issues of Permanent Mooring Systems , 2013 .

[52]  Lars Johanning,et al.  Mooring systems for wave energy converters: A review of design issues and choices , 2004 .

[53]  John R. Dorgan,et al.  Blends of biorenewable polyamide-11 and polyamide-6,10 , 2013 .

[54]  S. D. Weller,et al.  Synthetic rope responses in the context of load history: The influence of aging , 2015 .

[55]  Peter Davies,et al.  Modelling fiber rope load-elongation properties - Polyester and other fibers , 2010 .

[56]  Peter Davies,et al.  Development of HMPE Fiber for Permanent Deepwater Offshore Mooring , 2012 .

[57]  Gale P. Foster.  Advantages of Fiber Rope Over Wire Rope , 2002 .