SeaFEM is a suite of tools for the computational analysis of the effect of waves, wind and currents on naval and offshore structures, as well as for manoeuvring studies. SeaFEM has been developed for the most realistic seakeeping simulations of 3D multi-body radiation and diffraction problems, by solving potential flow equations in the time domain, using the finite element method on unstructured meshes.
SeaFEM features unique capabilities for global performance analysis of moored and/or connected systems subject to random sea states. SeaFEM applications include ships, spar, semi-submersible and TLP platforms, FPSO systems, marine wind turbines and ocean energy harnessing device.
SeaFEM is a state of the art solver for simulating seakeeping and maneuvering problems, developed at the International Center for Numerical Methods in Engineering (www.cimne.com) in collaboration with CompassIS and is built on the Tdyn-Compass FEM environment for structural and multi-physics analysis in science and engineering.
While most seakeeping softwares available are based on the frequency domain and boundary element method, SeaFEM has been developed for more realistic simulations solving potential flow equations in the time domain and using the finite element method on unstructured meshes, which is highly recommended for the simulation of complex geometries in large and deep domains.
SeaFEM has been conceived to simulate seakeeping capabilities of ships and offshore structures, as well as calculating the hydrodynamic loads due to waves, currents, and translational velocities acting simultaneously. Moreover, the software has been equipped with the capability of introducing any external load acting over the structure under study. These external loads can be used to model aerodynamic loads, mooring lines, viscous effects such as damping and viscous resistance, or any other effect that might depend on any variable used by the program. SeaFEM is also equipped with capabilities to simulate pressurized free surfaces. These capabilities provide the user with the tools for simulating complex devices such as air cushioned vehicles, and wave energy converters based on the oscillating water column principle. Furthermore, SeaFEM features a powerful Tcl interface enabling users to enhance simulations without recourse to external compiled subroutines. SeaFEM Tcl interface allows access to advanced features, including operations on internal structures and execution / communication with external programs.
More detailed information about SeaFEM features and system requirements can be found at SeaFEM Brochure and in the support page Support. Furthermore, here can be found a comparative table of the capabilities of SeaFEM and other commercial tools of this type.
CompassIS offers free non-commercial licences of SeaFEM calculation module. The terms of this free licence can be found here. To request a free non-commercial copy of SeaFEM, please send the license agreement signed by standard mail or fax, or signed digitally by email to CompassIS. Note that SeaFEM non-commercial requires a valid licence of the pre/postprocessor system GiD.
The latest SeaFEM version can be download from here. This version is free, but limited in the number of mesh nodes that can be generated. A one month trial password for activating all the capabilities for demo purposes can be obtained at Password page.
Tension Leg Platform (TLP) structure in irregular waves:
Time domain seakeeping analysis of a multi-body device:
Sea behaviour of a boat through irregular waves:
(cortesy of Isonaval )
TLP structure for an offshore wind turbine:
Seakeeping analysis of a 2.3 MW Spar-type floating wind turbine:
Seakeeping simulation of Tension Leg Platform (TLP) structure for an offshore wind turbine:
Simulation of an Oscillating Water Column device:
Simulation of a turning cycle in waves of a Surface Effect Ship (SES), courtesy of CIMNE:
Simulation of a Surface Effect Ship (SES) with rigid seals in still water, courtesy of CIMNE for ONR:
Bow seal-water interaction in the simulation of a Surface Effect Ship with rigid seals, courtesy of CIMNE for ONR: