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Volume 21, Issue 48 (12-2025)                   marineeng 2025, 21(48): 78-94 | Back to browse issues page

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Akrami M, Abazari A. Dynamic Response Analysis and Power Production Evaluation of a Combined Floating Breakwater–Wave Energy Converter System. marineeng 2025; 21 (48) :78-94
URL: http://marine-eng.ir/article-1-1189-en.html
Dynamic Response Analysis and Power Production Evaluation of a Combined Floating Breakwater–Wave Energy Converter System
Mohammad Akrami1 , Abuzar Abazari *1
1- Chabahar maritime university
Abstract:   (60 Views)
In coastal and offshore engineering, floating breakwaters are widely recognized as effective solutions for attenuating wave energy and protecting coastal infrastructure. However, the development of modern technologies has enabled these structures to simultaneously function as renewable energy systems. The goal of this study is to investigate the performance of a hybrid system consisting of a rectangular floating breakwater integrated with wave energy converters (WECs) of different sizes and configurations, aiming to enhance both coastal protection and energy generation. To achieve this, numerical simulations were conducted using ANSYS AQWA software, based on potential flow theory and wave diffraction analysis. Three different buoy diameters for the WECs and two distinct layouts (longitudinal and transverse) were examined. Additionally, the best damping coefficient for each converter was determined to maximize power extraction. The novelty of this work lies in combining the dynamic response analysis of a floating breakwater with a quantitative evaluation of power output while simultaneously assessing the effects of WEC size and arrangement. The findings reveal that the installation of WECs not only reduces pitch and heaving motions but also slightly increases surge motion by up to 25% in some configurations. The best performance was seen for a 1.5-meter buoy diameter in the longitudinal arrangement, capable of producing approximately 56 kW of power at a wave period of 5 seconds. Overall, the results confirm that the proposed hybrid floating breakwater–WEC system can serve as a dual-purpose solution, simultaneously providing coastal protection and renewable energy generation.
Keywords: Floating breakwater, ANSYS AQWA, Wave transmission coefficient, Geometric parameters, Mooring system, Energy Conversion
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Highlights 
  • Development of a hybrid floating breakwater–wave energy converter system with dual functionality: coastal protection and renewable energy generation.
  • Optimization of damping coefficients for 1 m, 1.5 m, and 2 m buoys based on maximizing the area under the power–period curve.
  • Achievement of approximately 56 kW power output at a 5 s wave period (best case: 1.5 m buoy, longitudinal layout).
  • Significant reduction of dynamic responses, including up to 50% heave reduction and 70% pitch reduction in the optimal configuration.
  • Demonstration of the critical role of buoy size and arrangement in balancing structural stability and energy efficiency.

 
Type of Study: Research Paper | Subject: Offshore Hydrodynamic
Received: 2025/05/24 | Accepted: 2026/03/28
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International Journal of Maritime Technology is licensed under a

Creative Commons Attribution-NonCommercial 4.0 International License.