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We are developing

To satisfy the specific needs of our clients, the Gsea Design team is developing its own software since 25 years.

Reliability, Innovation and Optimization are the key words which drive us to develop our software.

This way we are today equipped with a full suit of software from material properties  homogenization to fluid structure interaction FEA calculation tool.

This suit of software allow us to study an appendage, mast or a boat platform in record time.

This investment was rewarded in 2016 by obtaining the price of high technology from the Nautical Industries Federation for our appendage design tool SOFIA.

Research and development program :

  • Thesis on Fluid-Structure Interaction (FSI) and on composite material fatigue 
  • Member of the clusters for innovation: Pôle Mer Bretagne, Pôle EMC2
  • Joint projects with research laboratories and universities: IFREMER (French Research Institute for Exploitation of the Sea, ENSTA Bretagne (French Graduate and Post-graduate engineering school and research institute), Institut de Recherche en Génie Civil et Mécanique (Research Institute for Mechanics and Civil Engineering), UBO (University of Western Brittany)

OPHELIA is a stick finite element software. Initially developed in 1986 to design masts for racing boats, we’ve since made it evolve to design any type of slender structure from a multihull float to cargoship masts.

The advantage of a stick model is the gain in calculation and analysis time, allowing to study different configurations quickly without loosing precision or quality of the results.

Here are some features :

  • Creation of a parametric mast model
  • Aerodynamic loading
  • Creation of cables elements
  • Creation of lattice structures


Type of calculation :

  • Linear static
  • Non-linear static
  • Linear buckling
  • Linear dynamics
  • Modal analysis (vibration)
  • Optimization module


Today we use OPHELIA to :

  • Design, tune, optimize and validate all types of masts
  • Make pre study of multihulls platform
  • Design and calculate any type of beam type structure

We use

In our project management tooling, we constantly have our finger on the pulse regarding technology, from the most classic through to the most innovative, so as to guarantee the best possible compromise between costs/timeframe.
We run some of our digital simulations using recognised 2D and 3D CAD and FEA software.