New Insights in Turret Mooring Systems Yaw Dynamics

Caillé, François; Garbaccio, Grace Ladeira; Naciri, Mamoun

doi:10.1115/omae2014-24490

Cited by 2 publications

(2 citation statements)

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“…On the other hand, the turret's maximum rotation was 3° when the turret rotational stiffness was 10 kN•m/deg. Caille et al (2014) estimated the turret release angle as 3.7°. Since the turret's rotational stiffness is relatively small, the result can be considered reliable.…”

Section: Relative Motion Of the Turret And Vesselmentioning

confidence: 99%

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Effect of the Turret’s Rotational Damping on the Heading Stability of a Turret-Moored FPSO

Min

Park

Shin

et al. 2020

J. Ocean Eng. Technol.

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Certain types of facilities operating offshore need to maintain their position, for which diverse mooring systems are employed, such as single point mooring (SPM), spread mooring, and turret mooring systems (TMSs). TMSs are widely used in relatively harsh environments. The use of a turret allows a vessel to rotate towards a predominant external load to reduce its effective load. However, floaters equipped with a turret might experience a fish-tailing phenomenon in specific conditions, and in severe cases, the motion will worsen. Since turrets are widely utilized, abundant research has been accomplished, which has mainly been about the yaw behavior or factors related to heading stability. Various causes have been suggested as factors in yaw motion of turret-moored floaters, but the underlying causes still need to be verified. Munipalli et al. (2007) examined the response of the heading under conditions with multiple regular waves and fixed steepness from head sea. They found that large yaw motion occurred for a shorter wave period. Cho et al. (2013) experimented with the yaw motion of a turret-moored floating body in regular waves with fixed wave steepness. Studies have examined the effect of the distance between the turret and the center of gravity ( ) of a system and the distance between   and the center of the turret ( ). The maximum yaw angle in regular waves was analyzed, and it was found that when the turret is closer to   , the yaw motion is larger (Yadav et al., 2007). Sanchez-Mondragon et al. (2018) compared the results of a similar study with different configurations and wave steepness. The configuration and the environmental conditions were varied, and the turret position and the mooring stiffness influenced the specific wave period between 15.0 and 19.0 s. Kaasen et al. (2017) concluded that the interaction between yaw and sway is most important in their research on the heading control of turret-moored floating production storage and offloading (FPSO), which they performed with a simplified model. Garza-Rios and Bernitsas (1999) presented a mathematical model for the nonlinear dynamics of slow motions in the horizontal plane of a TMS in terms of the equation of motion. They proved that if the friction moment

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Section: Relative Motion Of the Turret And Vesselmentioning

confidence: 99%

“…As the external load increases, the turret is released from the vessel and then both rotate independently. The vessel rotates toward the predominant environmental load, while the turret rotates until the difference between moments caused by the external force and the moment generated by the distortion of mooring line(Caille et al, 2014).…”

mentioning

confidence: 99%

Effect of the Turret’s Rotational Damping on the Heading Stability of a Turret-Moored FPSO

Min

Park

Shin

et al. 2020

J. Ocean Eng. Technol.

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Applied Condition Monitoring and Digitalization of Turret Mooring Systems

Minnebo¹,

Duggal²,

Kumar³

2022

Day 1 Mon, May 02, 2022

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Turret Mooring Systems have a long and successful track record within the floating production industry. Turrets, and other weathervaning mooring systems, provide station-keeping capabilities to a floating facility, and allow for the safe transfer of fluids, utilities, and power, all across a rotational interface. Because the core enabling equipment is unique, industry guidance towards effective Condition Monitoring and Integrity Management of these systems is still largely absent, in comparison to more common aspects of the floating facility, such as the hull, or the riser and anchor leg mooring systems. Based on the authors’ experiences with engineering, supplying, and supporting operations of these systems, this paper aims to provide practical insight in how these systems and their unique components operate, and how their condition and performance can be assessed through inspection, instrumentation, and analysis. Digitalization of inspection methodologies, advances in instrumentation, and the development of advanced analytics is discussed as enabling technologies to provide additional insight into the condition of components which would normally be difficult to assess by traditional methods.

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New Insights in Turret Mooring Systems Yaw Dynamics

Cited by 2 publications

References 1 publication

Effect of the Turret’s Rotational Damping on the Heading Stability of a Turret-Moored FPSO

Effect of the Turret’s Rotational Damping on the Heading Stability of a Turret-Moored FPSO

Applied Condition Monitoring and Digitalization of Turret Mooring Systems

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