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Fluid-structure interaction simulation of the breaking wave slamming on an absorber for a wave-energy converter

Joris Degroote (UGent) , Jan Vierendeels (UGent) , Kameswara Vepa (UGent) and Wim Van Paepegem (UGent)
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Abstract
Wave-energy converters that consist of several egg-shaped structures, the so-called absorbers, which move relative to a large floating platform are currently under development. The maximal stress in the wall of an absorber due to the impact of waves (horizontal or breaking wave slamming) is an important design parameter. This breaking wave slamming is here modelled as the impact of a deformable circular cylinder on a flat water surface. The fluid-structure interaction during this impact is simulated in a partitioned way which means that the flow equations and the structural equations are solved with separate codes. A finite volume flow solver with a Volume of Fluid model for the free surface is coupled with a finite element structural solver which is capable of simulating multi-layer composite materials. Coupling iterations between both solvers are performed using the IQN-ILS algorithm. Initially, the thin-walled circular cylinder made of 5 layers of a composite material has a downward velocity of 5m/s. The damage to the composite material due to the impact is assessed with the Tsai-Wu failure criterion in plane stress condition. Its maximal value is 0.25 so well below the limit of 1. In conclusion, the current design of a composite absorber for a wave-energy converter is not damaged by breaking wave slamming according to the fluid-structure interaction simulations.
Keywords
Wave-energy converter, Slamming, Fluid-structure interaction, Composite, MULTILAYERED CYLINDRICAL-SHELL, FREE-SURFACE FLOWS, NUMERICAL-SIMULATION, DAMPING ANALYSIS, ALGORITHMS, SPH, INTERFACES, VIBRATION, SYSTEMS, DESIGN

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Citation

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Chicago
Degroote, Joris, Jan Vierendeels, Kameswara Vepa, and Wim Van Paepegem. 2011. “Fluid-structure Interaction Simulation of the Breaking Wave Slamming on an Absorber for a Wave-energy Converter.” In EURODYN-International Conference on Structural Dynamics, ed. Guide De Roeck, G Degrande, G Lombaert, and G Müller, 3062–3069. Ghent, Belgium: Ghent University, Department of Mechanical construction and production.
APA
Degroote, Joris, Vierendeels, J., Vepa, K., & Van Paepegem, W. (2011). Fluid-structure interaction simulation of the breaking wave slamming on an absorber for a wave-energy converter. In Guide De Roeck, G. Degrande, G. Lombaert, & G. Müller (Eds.), EURODYN-International Conference on Structural Dynamics (pp. 3062–3069). Presented at the 8th International Conference on Structural Dynamics (Eurodyn - 2011), Ghent, Belgium: Ghent University, Department of Mechanical construction and production.
Vancouver
1.
Degroote J, Vierendeels J, Vepa K, Van Paepegem W. Fluid-structure interaction simulation of the breaking wave slamming on an absorber for a wave-energy converter. In: De Roeck G, Degrande G, Lombaert G, Müller G, editors. EURODYN-International Conference on Structural Dynamics. Ghent, Belgium: Ghent University, Department of Mechanical construction and production; 2011. p. 3062–9.
MLA
Degroote, Joris, Jan Vierendeels, Kameswara Vepa, et al. “Fluid-structure Interaction Simulation of the Breaking Wave Slamming on an Absorber for a Wave-energy Converter.” EURODYN-International Conference on Structural Dynamics. Ed. Guide De Roeck et al. Ghent, Belgium: Ghent University, Department of Mechanical construction and production, 2011. 3062–3069. Print.
@inproceedings{2019836,
  abstract     = {Wave-energy converters that consist of several egg-shaped structures, the so-called absorbers, which move relative to a large floating platform are currently under development. The maximal stress in the wall of an absorber due to the impact of waves (horizontal or breaking wave slamming) is an important design parameter. This breaking wave slamming is here modelled as the impact of a deformable circular cylinder on a flat water surface. The fluid-structure interaction during this impact is simulated in a partitioned way which means that the flow equations and the structural equations are solved with separate codes. A finite volume flow solver with a Volume of Fluid model for the free surface is coupled with a finite element structural solver which is capable of simulating multi-layer composite materials. Coupling iterations between both solvers are performed using the IQN-ILS algorithm. Initially, the thin-walled circular cylinder made of 5 layers of a composite material has a downward velocity of 5m/s. The damage to the composite material due to the impact is assessed with the Tsai-Wu failure criterion in plane stress condition. Its maximal value is 0.25 so well below the limit of 1. In conclusion, the current design of a composite absorber for a wave-energy converter is not damaged by breaking wave slamming according to the fluid-structure interaction simulations.},
  author       = {Degroote, Joris and Vierendeels, Jan and Vepa, Kameswara and Van Paepegem, Wim},
  booktitle    = {EURODYN-International Conference on Structural Dynamics},
  editor       = {De Roeck, Guide and Degrande, G and Lombaert, G and Müller, G},
  isbn         = {9789076019314},
  issn         = {2311-9020},
  keywords     = {Wave-energy converter,Slamming,Fluid-structure interaction,Composite,MULTILAYERED CYLINDRICAL-SHELL,FREE-SURFACE FLOWS,NUMERICAL-SIMULATION,DAMPING ANALYSIS,ALGORITHMS,SPH,INTERFACES,VIBRATION,SYSTEMS,DESIGN},
  language     = {eng},
  location     = {Leuven, Belgium},
  pages        = {3062--3069},
  publisher    = {Ghent University, Department of Mechanical construction and production},
  title        = {Fluid-structure interaction simulation of the breaking wave slamming on an absorber for a wave-energy converter},
  year         = {2011},
}

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