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FRyDoM

Finished

Flexible and Rigid Body Dynamic Modeling for Marine Operations. Development of an open source framework for simulating complex dynamic systems involved in marine operations for Marine Renewable Energy.

Coordinateurs du projet

Context

Marine operations addressed by the FryDom project:

  • Involved throughout the entire life cycle of MREs
  • All types of technology concerned
  • Diversity, complexity, and high cost
  • Risk factors (human, material, economic)
  • Significant lever for reducing LCOE

 

Scientific breakthroughs and innovation

  • Multibody modeling using robotic approaches, coupling with hydrodynamics, coupling with large deformation cable modeling
  • Native integration of closed-loop control systems including dynamic positioning systems

Expected technical and economic impact

  •  Rapid modeling of complete installation scenarios
  • Building block for the future development of a variety of innovative business tools (training, virtual reality, embedded systems, etc.)
  • Strong potential for international dissemination resulting from open source

Demonstrator

  • FryDom open source framework for simulating marine operations applied to the immersion of the electrical hub on the SEM-REV in 2015

Results

January 2018

objectives in terms of modeling complex multibody systems involving connections between rigid and flexible bodies. The overall architecture of the framework is now stabilized and demonstrates excellent modularity and extensibility thanks to object-oriented programming in accordance with the latest C++ standards.

The main modules required for marine operations are now in place:

  • environment modeling (waves, tide height, currents, wind, seabed)
  • first-order hydrodynamic models of wave-structure interaction
    efforts due to currents and wind
  • cable modeling (catenary models and nonlinear finite element models)
  • propeller models
  • control algorithms (course keeping, position keeping, dynamic positioning)
  • simulation visualization

Extensive software engineering work has been carried out to ensure the quality and sustainability of developments.

The work between now and the end of the project will mainly focus on verifying the results obtained in simulation, further adapting the framework’s programming interface to the specific needs of the industry, particularly with regard to anchoring systems, the implementation of advanced features for recording simulation results and high-quality visualization, the implementation of the test cases planned in the project, and finally the preparation of the code and its documentation with a view to its release as open source in September 2018. The implementation of demonstration cases also remains to be developed and is one of the main objectives for the end of the project. In particular, the SEM-REV electrical hub installation case will be implemented during this period.

Figure 1: Offshore platform in swell and current with dynamic positioning control

D-ICE engineering already offers services and collaborative projects involving the FRyDoM framework. It is now one of the company’s strategic tools for development. A new development is planned in collaboration between D-ICE and LHEAA to adapt the framework to the simulation of floating wind turbines.

At the ICOE international conference to be held in Cherbourg in June 2018, an initial presentation of the FRyDoM open source framework will be made and its release as open source in September will be announced to the MRE community. Contacts can then be made and ideas for future collaborations will certainly emerge.