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Virtual Sensors for Mooring Line Tension Monitoring
Offshore Technology Conference, 2020Mooring line tension monitoring is required for permanently moored floating offshore platforms by some regional regulators and classification societies. This requirement is typically satisfied by installing physical sensors that directly measure the line tension.
Vivek Jaiswal +2 more
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A tension-recording sensor for mooring lines
Aquaculture International, 1995IFREMER and MICREL have developed a new compact and waterproof tension sensor to record force on lines in seawater. Two shackles link the sensor to the line, and it measures the tension over a short measuring period (e.g. 0.5 s). It records measurements on its internal memory.
Daniel Priour, Yves Degres
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Tension/Torsion Interactions in Multicomponent Mooring Lines
Offshore Technology Conference, 2000Abstract Six strand ropes generate torque under tension. This can lead to transfer of twist to other mooring line components, either permanently, or dynamically. The effects of this imposed twist can seriously affect strength and fatigue endurance. In order to predict the torsional interactions between components it
C.R. Chaplin, G. Rebel, I.M.L. Ridge
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Tension/Torsion Behavior of Deepwater Synthetic Mooring Lines
Offshore Technology Conference, 2006Abstract Synthetic fiber ropes are now being used in mooring systems off Brazil and in the Gulf of Mexico, and are being considered for deepwater handling applications. Their behavior under tension loads is well understood but induced torsion effects have received less attention. This paper presents tests to measure
P. Davies +3 more
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Controlling line tension in thruster assisted mooring systems
Proceedings of the 1999 IEEE International Conference on Control Applications (Cat. No.99CH36328), 2003Addresses the potential for energy reduction obtained by using dynamic line tensioning in thruster assisted position mooring systems. Traditionally, mooring systems have been designed in such a way that thruster assistance has not been necessary under normal environmental conditions.
O.M. Aamo, T.I. Fossen
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Experimental investigation of nonlinear dynamic tension in mooring lines
Journal of Marine Science and Technology, 2012Mooring lines are one of the most important parts of spar platforms. In this work, experimental investigation was carried out to obtain the dynamic tension and discover the nonlinear characters while a mooring line transfers from taut to taut–slack. Results show that, when system parameters change, the mooring line system may transform from one steady ...
Su-xia Zhang, You-gang Tang, Xi-jun Liu
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Extreme Value Estimation of Mooring Lines Top Tension
Volume 3: Structures, Safety, and Reliability, 2019Abstract It is known that the mooring system of floating platforms responds non-linearly to environmental loads. Even though the wave-frequency excitation can be assumed as a Gaussian process, the line tension generally is not a Gaussian process due to the second-order slow-drift floater motions and the nonlinearities of the system ...
Marina Leivas Simão +3 more
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Mooring line tension observed through a maximum entropy spectrum
Journal of Marine Science and Technology, 1999A method for measuring mooring line tension is proposed based on observation of the natural frequencies of the mooring line segment between the winch and the fairlead. The anchor line tension is observed through the string equation where an analytical expression for the line's eigen-frequencies is obtained.
Svein Ivar Sagatun +3 more
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Development of Data-Driven Models for Prediction of Mooring Line Tensions
Volume 1: Offshore Technology, 2020Abstract This paper describes the development of data-driven models for the prediction of mooring line tensions by separating the low- and wave-frequency components of the tensions, such that the former is approximated as quasi-static tensions while the latter is predicted using ANN models.
Yoo Sang Choo +5 more
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