|Design Code in X-SEA|
- Explicit method: Central difference
- Implicit method: Newmark-beta, Wilson-theta and HHT
- LD Ritz vector
- Morison equation for the offshore steel framed structures
- Diffraction theory for the large offshore structures such as the concrete gravity and huge floating structures.
- Impact dynamic analysis of large deformation elasto-plastic analysis can be carried out.
In the analysis and design of offshore wind turbine support structure, engineers need a solution for the coupled analysis of wind turbine and hydrodynamic loads on structures.
Fully coupled analysis of offshore wind turbine structure can be carried out using a high performance graphical input of OpenFAST and X-SEA.
The quasi-static mooring method based on FAST 8 is implemented in the X-SEA. X-SEA mooring analysis module accounts for the self weight of the mooring line in sea water, the elastic tension of the mooring line, and the seabed friction contact of each line.
All catenary element formulation and nonlinear equation in X-SEA are solved and programmed in the range of X-SEA own source code without using any third party library and source code.
In the analysis and design of FOWT support structure, engineers need a solution for the coupled dynamic analysis of wind turbine and hydrodynamic loads.
For steady flow below the surface, Morison's formula is appropriate for computation of forces on a submerged mooring cable. The force exerted by a fluid on an accelerating body is composed of two components, one depending upon friction effects and the other upon displaced fluid inertia.
The hydrodynamic analysis of substructures includes linear hydrostatic restoring, wave force from Morison’s equation, added mass and damping and incident wave excitation from linear diffraction.
Mooring lines analysis : A quasi-static mooring analysis. This module accounts for the apparent weight of the mooring line in fluid, the elastic stretching of the mooring line, and the seabed friction of each line.
Post-processing of integrated design results for ULS and FLS from GH-Bladed and OpenFAST.