A comparison of numerical approaches for the design of mooring systems for wave energy converters
| Autor: | Borja de Miguel, Imanol Touzon, Victor Petuya, Vincenzo Nava |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Optimal design
Computer science 020209 energy media_common.quotation_subject wave energy conversion linear hydrodynamics catenary mooring system Ocean Engineering 02 engineering and technology Inertia 01 natural sciences 010305 fluids & plasmas lcsh:Oceanography lcsh:VM1-989 0103 physical sciences Catenary 0202 electrical engineering electronic engineering information engineering lcsh:GC1-1581 Time domain Water Science and Technology Civil and Structural Engineering media_common lcsh:Naval architecture. Shipbuilding. Marine engineering Mooring Dynamic mooring lines Linear hydrodynamics dynamic mooring lines Wave energy conversion ComputingMilieux_GENERAL Drag Frequency domain Catenary mooring system Quasistatic process Marine engineering |
| Zdroj: | Addi. Archivo Digital para la Docencia y la Investigación instname Addi: Archivo Digital para la Docencia y la Investigación Universidad del País Vasco Journal of Marine Science and Engineering, Vol 8, Iss 523, p 523 (2020) Journal of Marine Science and Engineering Volume 8 Issue 7 |
| Popis: | This paper analyses the numerical outcome of applying three different well-known mooring design approaches to a floating wave energy converter, moored by means of four catenary lines. The approaches include: a linearized frequency domain based on a quasistatic model of the mooring lines, a time domain approach coupled with an analytic catenary model of the mooring system, and a fully coupled non-linear time domain approach, considering lines&rsquo drag and inertia forces. Simulations have been carried out based on a set of realistic combinations of lines pretension and linear mass, subject to extreme environmental conditions. Obtained results provide realistic cost and performance indicators, presenting a comparison in terms of total mooring mass and required footprint, as well as the design line tension and structure offset. It has been found that lines&rsquo viscous forces influence significantly the performance of the structure with high pretensions, i.e. > 1.2, while there is acceptable agreement between the modelling approaches with lower pretensions. Line tensions are significantly influenced by drag and inertia forces because of the occurrence of snap loads due to the heaving of the floater. However, the frequency domain approach provides an insight towards the optimal design of the mooring system for preliminary designs. |
| Databáze: | OpenAIRE |
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