Mooring System Optimisation and Effect of Different Line Design Variables on Motions of Truss Spar Platforms in Intact and Damaged Conditions

Montasir, O.A.; Yenduri, Anurag; Kurian, V.J.

doi:10.1007/s13344-019-0037-1

Cited by 12 publications

(4 citation statements)

References 10 publications

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“…However, steel risers are heavy and add to the weight called the deck load, as such there is the need to have a weight-optimised riser. Thus, the need for other structures like flexible risers, hybrid composite risers, and steel catenary risers (SCR) [204][205][206][207][208][209][210][211][212]. A typical hydrodynamic model developed using environmental data for a floating semisubmersible platform in Orcaflex 10.3d is given in Figure 5.…”

Section: Structural Attachments: Mooring Lines and Marine Risersmentioning

confidence: 99%

“…The lifting, transportation, installation, design, fabrication, and commissioning of these offshore platforms must all be carefully planned to meet these goals [193][194][195][196][197][198][199][200][201][202][203]. The foundation of this semi-submersible in deeper waters requires excellent payload integration [204][205][206][207][208][209][210][211][212] for minimal motion responses across all degrees of freedom (DoF) due to the direction of the superstructure [213][214][215]. Hence the need for more understanding of the offshore structures, with the types of applications reviewed in Part I [5].…”

Section: Introductionmentioning

confidence: 99%

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Review on Fixed and Floating Offshore Structures. Part II: Sustainable Design Approaches and Project Management

Amaechi

Reda

Butler

et al. 2022

JMSE

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Offshore structures exist in a variety of forms, and they are used for a variety of functions in varied sea depths. These structures are tailored for certain environments and sea depths. Different actions for suitable equipment selection, platform type design, and drilling/production processes are required for the applications of these offshore structures, as given in Part I. This paper is the second part, which outlines various processes, loads, design approaches and project management of offshore platforms. To achieve these, proper planning must be conducted for lifting, transportation, installation, design, fabrication, and commissioning of these offshore platforms. Some historical developments of some offshore structures are presented, and some project planning routines are undertaken in this research. The ultimate goal is to provide a general overview of the many processes of offshore platform design, construction, loadout, transportation, and installation. Some discussions on the design parameters such as water depth and environmental conditions were presented. It also lists various software programs used in engineering designs. The review also includes information on cutting-edge offshore platforms and industry advancements. Ultimately, for long-term operations, various types of offshore platforms for specific seawater depths are available.

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Section: Structural Attachments: Mooring Lines and Marine Risersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Review on Fixed and Floating Offshore Structures. Part II: Sustainable Design Approaches and Project Management

Amaechi

Reda

Butler

et al. 2022

JMSE

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“…There are also investigations on the change in global responses of other types of floating platforms in the oil and gas industry, considering the failure of mooring lines based on numerical simulations. The effects of mooring diameters, fairlead slopes, and pretensions on the dynamic responses of a truss spar platform under the intact and damaged mooring line conditions were studied by Montasir et al [17]. Feng et al [18] presented a method for analyzing the stability of floating platforms after the mooring line is broken, based on the time-domain analysis.…”

Section: Introductionmentioning

confidence: 99%

Transient Responses Evaluation of FPSO with Different Failure Scenarios of Mooring Lines

Qiao

Yan

et al. 2021

JMSE

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During the long-term service condition, the mooring line of the deep-water floating platform may fail due to various reasons, such as overloading caused by an accidental condition or performance deterioration. Therefore, the safety performance under the transient responses process should be evaluated in advance, during the design phase. A series of time-domain numerical simulations for evaluating the performance changes of a Floating Production Storage and Offloading (FPSO) with different broken modes of mooring lines was carried out. The broken conditions include the single mooring line or two mooring lines failure under ipsilateral, opposite, and adjacent sides. The resulting transient and following steady-state responses of the vessel and the mooring line tensions were analyzed, and the corresponding influence mechanism was investigated. The accidental failure of a single or two mooring lines changes the watch circle of the vessel and the tension redistribution of the remaining mooring lines. The results indicated that the failure of mooring lines mainly influences the responses of sway, surge, and yaw, and the change rule is closely related to the stiffness and symmetry of the mooring system. The simulation results could give a profound understanding of the transient-effects influence process of mooring line failure, and the suggestions are given to account for the transient effects in the design of the mooring system.

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“…The global model was based on the general trend of sinusoidal functions for the surge (𝑋) and the yaw moment(𝑁), and the cosine function for the sway force (𝑌). The proposed mathematical models are given by Equations ( 4)- (6). where 𝜌 (kg/m 3 ) is water density and 𝑉 (m/s) is ship speed.…”

mentioning

confidence: 99%

A Review of Ship-to-Ship Interactions in Calm Waters

Muscat–Fenech

Sant

Zheku

et al. 2022

JMSE

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The hydrodynamic interaction between two or more ships in harbours or inland waterways is a classical maritime engineering research area. In ship manoeuvring practice, ship masters try to determine the speed and gap limit when a ship is passing or encountering others, particularly in confined water ways. This requires an accurate prediction of the interaction force acting on both ships. The pioneer experimental studies showed that the interaction could lead to a very large yaw moment and this moment is strongly time-dependent, which could make the ships veer from their original courses, leading to collisions. Based on the findings on experimental measurements, some empirical formulas are proposed in the literature to predict such interaction forces. However, these formulas could provide a satisfactory estimation only when the ship speed is quite high, and the water depth is shallow and constant. Numerical simulation overcomes this issue by simulating the ship-to-ship problem by considering the effect of the 3D ship hull, variable water depth and ship speed. Numerical simulation has now become the most widely adopted method to investigate the ship-to-ship problem. In the present study, the development of the methodologies of ship-to-ship problems will be reviewed, and the research gap and challenges will be summarized.

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Mooring System Optimisation and Effect of Different Line Design Variables on Motions of Truss Spar Platforms in Intact and Damaged Conditions

Cited by 12 publications

References 10 publications

Review on Fixed and Floating Offshore Structures. Part II: Sustainable Design Approaches and Project Management

Review on Fixed and Floating Offshore Structures. Part II: Sustainable Design Approaches and Project Management

Transient Responses Evaluation of FPSO with Different Failure Scenarios of Mooring Lines

A Review of Ship-to-Ship Interactions in Calm Waters

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