Deployment of Subsea Equipment: Qualification of Large Diameter Fibre Rope for Deepwater Construction Applications

Törnqvist, Rikard; Strande, Martin; Cannell, David; Gledhill, Peter L.; Smeets, Paul; Gilmore, J. M.

doi:10.4043/21588-ms

Cited by 7 publications

(6 citation statements)

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“…It is evident that the internal abrasion is the main contributor to the increase in temperature. Törnqvist et al (2011) support this statement, as they observed that the higher temperatures were between the strands, mainly due to friction from the internal movement.…”

Section: Thermographymentioning

confidence: 65%

“…A natural extension from manual visual inspection, is the use of computer vision as a means of continuous condition monitoring for fiber ropes. Törnqvist et al (2011) performed CBOS testing of a large diameter HMPE fiber rope from Dyneema R with experimental results as shown in Figure 9. During the testing, the authors documented the condition of the fiber rope at 25 %, 50 %, 75 % and 100 % of its lifetime.…”

Section: Computer Visionmentioning

confidence: 99%

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Condition Monitoring Technologies for Synthetic Fiber Ropes - a Review

Oland

Schlanbusch

Falconer

2020

IJPHM

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This paper presents a review of different condition monitoring technologies for fiber ropes. Specifically, it presents an overview of the articles and patents on the subject, ranging from the early 70’s up until today with the state of the art. Experimental results are also included and discussed in a conditionmonitoring context,where failuremechanisms and changes in physical parameters give improved insight into the degradation process of fiber ropes. From this review, it is found that automatic width measurement has received surprisingly little attention, and might be a future direction for the development of a continuous condition monitoring system for synthetic fiber ropes.

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Section: Thermographymentioning

confidence: 65%

Section: Computer Visionmentioning

confidence: 99%

Condition Monitoring Technologies for Synthetic Fiber Ropes - a Review

Oland

Schlanbusch

Falconer

2020

IJPHM

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“…Fatigue investigations on HMPE have been mainly focused on rope bending fatigue performance (e.g. [20]- [24]) as it was identified as the most severe case for handling lines. Nevertheless to be able to quantify the life time expectancy of a rope we have to establish a theory for pure tension fatigue.…”

Section: Synthetic Rope Fatigue Behaviourmentioning

confidence: 99%

Tension fatigue failure prediction for HMPE fibre ropes

et al. 2018

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In order to predict the lifetime of fibre rope mooring lines it is essential to be able to predict their behaviour under tension fatigue. Creep failure is known to be a major contributor to fatigue in synthetic fibres and models to predict creep failure are well-established. We show that expansion of such models to varying loading conditions allows the prediction of the fatigue performance. However, it is difficult to design tests to quantify the fatigue performance for HMPE ropes since often premature failure occurs due to external abrasion and viscous heating due to too high testing frequencies or amplitudes. This paper presents a testing methodology which allows tensile fatigue lifetime to be evaluated by testing at higher temperature to avoid premature abrasion failure. We also show that when the temperature evolution due to viscous heating is properly accounted for the modelling framework presented can be effectively used to describe the premature failure occurring due to this heating effect. Results from tests on yarns and small ropes are presented, and a predictive model for rope fatigue lifetime has been validated.

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“…(Feyrer, 2007, Nabijou andHobbs, 1995;Vennemann et al, 2008), but synthetic fibre ropes are less well-known. There have been some industry studies, the DISH (Deep water Installation of Subsea Hardware) (2001)(2002)(2003)(2004)(2005)(2006) Joint Industry Project involved some testing, and various other offshore projects using synthetic ropes are underway (Tornqvist et al, 2011;Torben et al, 2007;Gilmore et al, 2008;Thomas and Gilmore, 2009), but few results have been published to date. The ropes of interest for these applications, both oceanographic and offshore, are braided.…”

Section: Introductionmentioning

confidence: 97%

An empirical model to predict the lifetime of braided HMPE handling ropes under cyclic bend over sheave (CBOS) loading

et al. 2015

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a b s t r a c tRepeated bending over sheaves is one of the main causes of failure of synthetic fibre ropes used in marine operations. There are few published results available and even fewer models allowing lifetime to be estimated. A large new set of data from cyclic bend over sheave (CBOS) tests on 250 kN break load braided HMPE synthetic ropes is presented first, both tests to failure and interrupted tests followed by residual strength measurements. These data are analysed in order to propose an empirical lifetime model. This is identified using constant load tests, then evaluated for variable load sequences. A methodology to include rope lifetime prediction in handling system design is then discussed.

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Deployment of Subsea Equipment: Qualification of Large Diameter Fibre Rope for Deepwater Construction Applications

Cited by 7 publications

References 0 publications

Condition Monitoring Technologies for Synthetic Fiber Ropes - a Review

Condition Monitoring Technologies for Synthetic Fiber Ropes - a Review

Tension fatigue failure prediction for HMPE fibre ropes

An empirical model to predict the lifetime of braided HMPE handling ropes under cyclic bend over sheave (CBOS) loading

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