Drilling and Production Risers

Brekke, James N.

doi:10.1016/b978-0-08-044381-2.50016-3

Cited by 10 publications

(8 citation statements)

References 19 publications

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“…Time-domain studies normally provide more accurate solutions as compared to frequency-domain studies at the expense of more computational time (Brekke et al, 2005). Again, as civil engineering structures are subjected to random excitations, such as storms, earthquakes, and ocean waves, multiple sets of time-domain studies are required to obtain a generalized assessment of the performance of the damper.…”

Section: Discussionmentioning

confidence: 99%

A review on various configurations of the passive tuned liquid damper

Konar

Ghosh

2022

Journal of Vibration and Control

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Passive tuned liquid dampers, being cost-effective, easy to implement, and reliable structural vibration control devices, have received significant attention from designers and researchers. Considerable works devoted to the extraction of higher damping, increase in volumetric efficiency, improvement in architectural adaptability, and use in a large spectrum of structures have led to the development of a variety of configurations of passive tuned liquid dampers. Rigorous research efforts are being devoted to the utilization of different forms of tuned liquid dampers for the vibration control of buildings, bridges, chimneys, wind turbines, etc. However, till now, only a few varieties of tuned liquid dampers have been implemented in real-life structures, while the others require further refinement. This necessitates the present work, through which a systematic review on tuned liquid dampers of various configurations for structural response reduction is presented, with a focus on the design of the dampers. To organize the review in a structured manner, the large family of tuned liquid dampers is categorized into five groups based on their energy dissipation mechanism, namely the tuned sloshing damper, tuned liquid column damper, combined tuned sloshing damper-tuned liquid column damper system, compliant liquid damper, and liquid damper with submerged tuned oscillator. The modeling, analysis, design, and performance-related aspects of the different varieties of tuned liquid dampers are covered. The advantages and applicability of the different types of tuned liquid dampers are highlighted along with their real-life installations. The current gaps in the development of the various tuned liquid damper configurations and scope of future developments are also identified.

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Section: Discussionmentioning

confidence: 99%

A review on various configurations of the passive tuned liquid damper

Konar

Ghosh

2022

Journal of Vibration and Control

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“…The simple harmonic oscillator model for a two-dimensional (2D) cylinder has been widely used in riser analysis. 4,23 Codes such as the OrcaFlex 19 provide wake oscillator model options for carrying out more accurate VIM analysis. However, the phenomenon is still complex, especially in the case of sheared currents.…”

Section: Fsimentioning

confidence: 99%

“…Design of floaters such as Tension Leg Platforms (TLPs), Semisubmersibles (Semisubs), Spars and Floating Production Storage and Offloading ships (FPSOs) is discussed by Halkyard; 2 moorings, cables, anchors and so on that are required for station-keeping are discussed by Brown 3 and risers that are required to meet functional requirements are discussed by Brekke. 4 Bai and Bai 5 give practical and design aspects of riser engineering, with a brief outline of rigorous analysis techniques.…”

Section: Introductionmentioning

confidence: 99%

Analysis of deepwater offshore structures: Issues and challenges

Vendhan

2013

Proceedings of the Institution of Mechanical Engineers, Part M:

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A brief overview of analysis of deepwater offshore structures with reference to modeling issues is presented. Floaters with moorings and risers exhibit nonlinear response under environmental loads. The modeling of such structures poses many challenges because of the flexibility of the riser/mooring system, fluid–structure interaction and random nature of wave loads. Tensioned beam finite elements can be used for structural modeling of line elements. Computational fluid dynamic modeling may be used to firm up hydrodynamic coefficients required in the Morison equation for the estimation of fluid loads on structural elements, as well as to evolve simplified models to represent vortex-induced motions. While wave-body interaction of large-volume structures may be modeled using computational fluid dynamic tools, the use of numerical models employing the fully nonlinear potential flow theory is worth exploring. Simpler analytical models for use in design analysis may be developed by employing coupled models based on nonlinear structural finite element methods and computational fluid dynamic tools. Simpler methods of evaluating stress-range statistics required for fatigue damage estimation need to be developed for the case of nonlinear stochastic response of deepwater systems.

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“…Their study pointed out that the soil effects reduce the structural natural frequency, but not considering the hydrodynamic viscous damping that could affect the structural dynamics. Other studies utilised the inertia coefficient (C M ) of the Morison equation and diffraction wave theory for considering the viscous damping effect of VIV during wave loading over monopile turbines (Brekke et al 2005; Bisoi and Haldar 2014). Despite several methods for estimating the viscous terms generated by VIV, its calculation may be challenging.…”

Section: Introductionmentioning

confidence: 99%

Vortex-induced vibration effect of extreme sea states over the structural dynamics of a scaled monopile offshore wind turbine

Rueda-Bayona

Guzmán

Eras

2022

J. Ocean Eng. Mar. Energy

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In order to demonstrate the relevance of considering Vortex-Induced Vibrations (VIV) in the structural design of marine structures, this study proposes an alternative experimental and analytical approach in wet conditions to measure the fluid–structure interaction in the near field and quantify the viscous damping with measured structural and 3D hydrodynamic accelerations. It was demonstrated that VIV caused and incremented 5.00% of the structural damping coefficient, and the extreme wind loading increased 74% of the offshore monopile’s structural damping, demonstrating the relevance of the high non-linear hydrodynamics effects during selecting parameters into the structural design in offshore applications.

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Drilling and Production Risers

Cited by 10 publications

References 19 publications

A review on various configurations of the passive tuned liquid damper

A review on various configurations of the passive tuned liquid damper

Analysis of deepwater offshore structures: Issues and challenges

Vortex-induced vibration effect of extreme sea states over the structural dynamics of a scaled monopile offshore wind turbine

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