Preliminary Assessment of the Importance of Platform–Tendon Coupling in a Tension Leg Platform

Masciola, Marco; Nahon, Meyer; Driscoll, Frederick

doi:10.1115/1.4023795

Cited by 4 publications

(2 citation statements)

References 19 publications

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“…The strength of the platform-cable coupling is dependent on many parameters [12], but the platform-mass to cable-mass ratio is one common proxy for identifying the strength of this coupling [5]. The severity of the sea state also implies the importance of using a dynamic mooring model in the simulation as demonstrated in the DeepCwind semisubmersible tank test campaign [12,13]. Because of the limitations with quasi-static analysis, a dynamic mooring formulation is viewed as a rigorous approach for measuring ultimate and fatigue loads in floating offshore wind turbine moorings.…”

Section: Dynamic Mooring Line Capabilitiesmentioning

confidence: 99%

Extending the Capabilities of the Mooring Analysis Program: A Survey of Dynamic Mooring Line Theories for Integration Into FAST

Masciola

Jonkman

Robertson

2014

Volume 9A: Ocean Renewable Energy

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Techniques to model dynamic mooring lines take various forms. The most widely used models include a heuristic representation of the physics (such as a lumped-mass system), a finite-element analysis discretization of the lines (discretized in space), or a finite-difference model (which is discretized in both space and time). In this paper, the authors explore the features of the various models, weigh the advantages of each, and propose a plan for implementing one dynamic mooring line model into the open-source Mooring Analysis Program (MAP). MAP is currently used as a module for the FAST offshore wind turbine computer-aided engineering (CAE) tool to model mooring systems quasi-statically, although dynamic mooring capabilities are desired. Based on the exploration in this paper, the lumped-mass representation is selected for implementation in MAP based on its simplicity, low computational cost, and ability to provide physics similar to those captured by higher-order models. To begin, the underlying theories defining the three classes of dynamic mooring line models are identified and explored. This leads to insight into the capabilities of each representation. These capabilities are weighed against the current needs of the FAST wind turbine CAE tool, to which MAP will be coupled. Based on the assessment, a plan for integrating the dynamic mooring line theory into the current MAP structure is developed. Common problems arising from the determination of the model static equilibrium and known issues with numerical stability are addressed. Because MAP is a module that FAST can call, a plan consistent with the FAST modularization framework principles is described. Adding dynamic mooring line capabilities extends the features in MAP and also allows uncoupled analysis to be performed through MAP’s native Python bindings.

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Section: Dynamic Mooring Line Capabilitiesmentioning

confidence: 99%

Extending the Capabilities of the Mooring Analysis Program: A Survey of Dynamic Mooring Line Theories for Integration Into FAST

Masciola

Jonkman

Robertson

2014

Volume 9A: Ocean Renewable Energy

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“…Recently there have been a number of studies investigating TLP support structures for FOWTs [22][23][24][25][26][27][28].…”

Section: Finite-element Approachmentioning

confidence: 99%

Offshore floating vertical axis wind turbines, dynamics modelling state of the art. Part II: Mooring line and structural dynamics

Borg

Collu

Kolios

2014

Renewable and Sustainable Energy Reviews

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The need to exploit enhanced wind resources far offshore as well as in deep waters requires the use of floating support structures to become economically viable. The conventional three-bladed horizontal axis wind turbine may not continue to be the optimal design for floating applications. Therefore it is important to assess alternative concepts in this context that may be more suitable. Vertical axis wind turbines (VAWTs) are a promising concept, and it is important to first understand the coupled and relatively complex dynamics of floating VAWTs to assess their technical feasibility. As part of this task, a series of articles have been developed to present a comprehensive literature review covering the various areas of engineering expertise required to understand the coupled dynamics involved in floating VAWTs. This second article focuses on the modelling of mooring systems and structural behaviour of floating VAWTs, discussing various mathematical models and their suitability within the context of developing a model of coupled dynamics for. Emphasis is placed on computational aspects of model selection and development as computational efficiency is an important aspect during preliminary design stages. This paper has been written both for researchers new to this research area, outlining underlying theory whilst providing a comprehensive review of the latest work, and for experts in this area, providing a comprehensive list of the relevant references where the details of modelling approaches may be found.

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On investigating dynamic coupling in floating platform and overhead crane interactions: modeling and control

Khair Al-Solihat,

Al Saaideh,

Al-Rawashdeh

et al. 2024

Nonlinear Dyn

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Preliminary Assessment of the Importance of Platform–Tendon Coupling in a Tension Leg Platform

Cited by 4 publications

References 19 publications

Extending the Capabilities of the Mooring Analysis Program: A Survey of Dynamic Mooring Line Theories for Integration Into FAST

Extending the Capabilities of the Mooring Analysis Program: A Survey of Dynamic Mooring Line Theories for Integration Into FAST

Offshore floating vertical axis wind turbines, dynamics modelling state of the art. Part II: Mooring line and structural dynamics

On investigating dynamic coupling in floating platform and overhead crane interactions: modeling and control

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