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The Effect of Mooring Line Pre-Tension on FDPSO’s Motion
Volume 7: Ocean Engineering, 2016As a multifunction floating platform, Floating Drilling, Production, Storage and Offloading (FDPSO) combining the well-known Floating Production, Storage and Offloading (FPSO) with a drilling unit. For the environment condition of deep-water oilfield is very severe, the motion response and mooring line tension of FDPSO is a worthy topic of studying. In
Yanlong Sun +4 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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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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Mooring Line Tensions Prediction Based on MLP for Soft Yoke Mooring System
Volume 5B: Ocean EngineeringAbstract The soft yoke mooring system is widely used for the floating production storage and offloading (FPSO) in shallow water. However, there were accidents of mooring system being pulled down by the FPSO in field. It is hence necessary to conduct realtime prediction of mooring line tensions.
Ying Li, Qiyuan Zhong, Qiang Gan
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Tension In A Taut Line Mooring; Frequency Domain Analysis
Offshore Technology Conference, 1974ABSTRACT The random response of a taut line mooring excited by sea waves is treated in this paper. For analytical convenience, mooring line tension is divided into a deterministic quasi-static component and a random dynamic component.
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Prediction of Offshore Platform Mooring Line Tensions Using Artificial Neural Network
Volume 1: Offshore Technology, 2017Station-keeping is one of the important factors in the design of offshore platforms. Some offshore platforms, such as Spar, Semi-submersible and FPSO, use mooring lines as a mean for station-keeping. Tensions in the mooring lines are one of the key factors in station-keeping. The design of an offshore platform and its mooring lines is based on computed
Djoni E. Sidarta +3 more
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Calibration of Weather Dependent Mooring Line Tension Safety Factors
Offshore Technology ConferenceAbstract The regulations in Norway require the mooring design check to be done for a 100-year storm. This requirement is also valid for short-term drilling operation. This typically leads to mooring systems with long mooring lines, poor operability for drilling operations and significant thruster usage to keep position.
K. Ejdfors, K. Nilsen, T. Hørte
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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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Comparative Study of Extreme Value Estimation Approaches for Mooring Lines Top Tension Responses
Journal of Offshore Mechanics and Arctic Engineering, 2020Abstract It is known that the mooring system response of floating production units subjected to environmental loads is nonlinear. Even though wave elevations can be assumed as Gaussian processes for short-term periods, corresponding line tension responses generally are not, due to second-order slow-drift floater motions and intrinsic ...
Marina Leivas Simão +4 more
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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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