Experiences with object-oriented and equation based modeling of a floating support structure for wind turbines in Modelica

Brommundt, Matthias; Muskulus, Michael; Strach, Mareike; Strobel, Michael; Vorpahl, Fabian

doi:10.1109/wsc.2012.6465105

Cited by 9 publications

(6 citation statements)

References 11 publications

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“…The level of modelling detail used dictates the computational resources required, and sometimes increased levels of detail do not warrant the additional computational effort for small changes in the results. This was experienced by Brommundt et al [51] where the authors found that a full nonlinear mooring model greatly slows simulations (by about 30 times).…”

Section: Computational Issuesmentioning

confidence: 93%

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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Section: Computational Issuesmentioning

confidence: 93%

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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“…This is due to the limited communication in the interface between different codes as well as the restricted use of less efficient numerical solvers [88]. Furthermore Brommundt et al [31] found that different numerical solvers may have a significant effect on simulation performance.…”

Section: Programming Methodologiesmentioning

confidence: 99%

“…Whilst it has been used successfully for fixed offshore wind turbine structures and for spar-type floating support structures (e.g. [20,[31][32][33]), the slender-body assumption does not hold for most floating wind turbine support structure concepts as many designs involve the use of large-volume structures (cf. Figs.…”

Section: The Morison Equationmentioning

confidence: 99%

Offshore floating vertical axis wind turbines, dynamics modelling state of the art. Part III: Hydrodynamics and coupled modelling approaches

Borg

Collu

2015

Renewable and Sustainable Energy Reviews

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“…This library comprises all major components of a wind turbine also models for aerodynamic and hydrodynamic load calculations. The in-house tool One Wind proves how coupled analyses of a wind turbine are realized based on the object oriented modeling language Modelica [19][20][21][22]. In an early stage of the design process, simple models are needed to make important design decisions.…”

Section: Introductionmentioning

confidence: 99%

Conceptual design methodology for the preliminary study of a mechatronic system: application to wind turbine system

Hamza

Hammadi

Barkallah

et al. 2017

Mechanics & Industry

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This paper deals with a methodology for the preliminary design of a mechatronic system regarding the vibrational aspects using analytical approach with Modelica/Dymola. In fact, today, the most commonly used approach for modeling the vibrational behavior of a system is the finite element method. This method is effective however; it is very costly in computation time and space memory and not allows analyzing the whole mechatronic system because of the large number of components to be integrated. The main purpose of this work is to create compact analytical models and especially flexible beams in Modelica/Dymola. These elements can be thereafter inserted in a mechatronic system in order to study its vibrational aspects. The proposed approach aimed to highlight the importance of the structure analysis from the early stage of design and how the developed models allow a fast modeling. Our proposed approach is illustrated for the wind turbine system. In order to predict the motion and the deformation of the flexible system, the derived model considers the structural dynamics of the system and includes the dynamic coupling between the subcomponents. Selected simulation results have been presented to validate the model with respect to scientific reference case. The correctness of the results has been also ascertained by a comparison with those obtained by the finite element analysis using ABAQUS and with those obtained by the model based on the Beam component which belongs to the Modelica Flexible Bodies Library.

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Experiences with object-oriented and equation based modeling of a floating support structure for wind turbines in Modelica

Cited by 9 publications

References 11 publications

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

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

Offshore floating vertical axis wind turbines, dynamics modelling state of the art. Part III: Hydrodynamics and coupled modelling approaches

Conceptual design methodology for the preliminary study of a mechatronic system: application to wind turbine system

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