Results 211 to 220 of about 446 (252)
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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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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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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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Study on Snap Tension in Mooring Lines of Deepwater Platform
Volume 4: Ocean Engineering; Ocean Renewable Energy; Ocean Space Utilization, Parts A and B, 2009Based on the theory of impact dynamics, the motion equations for a mooring line-floating body system after and before impact loading are established with consideration of the viscoelastic property of mooring lines. The factors that influence the taut-slack conditions of a mooring system are analyzed through classifying the taut-slack regions, which are
Su-xia Zhang +2 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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On the Probability Distribution of Mooring Line Tensions in a Directional Environment
Volume 3: Materials Technology; Jan Vugts Symposium on Design Methodology of Offshore Structures; Jo Pinkster Symposium on Second Order Wave Drift Forces on Floating Structures; Johan Wichers Symposium on Mooring of Floating Structures in Waves, 2011A joint probabilistic model of the metocean environment is assembled, taking account of wind, wave and current and their respective heading angles. Mooring line tensions are computed in the time domain, for a large set of short-term stationary conditions, intended to span the domain of metocean conditions that contribute significantly to the ...
Jan Mathisen +2 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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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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Statistics of Mooring-Line Tension in Random Waves
Offshore Technology Conference, 1989ABSTRACT Dynamics and fatigue analysis have been used quite frequently to evaluate mooring systems for permanent applications. In a conventional frequency domain approach, the distribution of tension amplitudes is obtained from the spectral density function of tension variation assuming, that the amplitudes are ...
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A Research on Tension Determination and Morphological Simulation Model of Mooring Lines
ICTIS 2013, 2013Mooring lines tension determination is of significant importance for mooring design and berthing structures. The tension determination model is the base for mooring lines force analysis and morphological simulation. Based on rod-micro-element model, a mooring lines tension determination model is proposed for calculating the mooring lines force that a ...
Shengli Li +5 more
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