X-SEA

Solutions

Steel Structural Analysis & Design (Code Checking)

After in-place analysis, the member force and moments can be checked from the various design code and printed by the colorful unit value.
X-SEA software is supporting major rules and standards as following design code.
Design Code in X-SEA
API WSD & LRFD
AISC ASD& LRFD
Euro Code 3
Korean Code
NORSOK
ISO 19902
IEC61400-3

Solutions of Linear & Nonlinear Dynamic Analysis

Dynamic Time-history analysis

- Explicit method: Central difference
- Implicit method: Newmark-beta, Wilson-theta and HHT

Mode superposition method for linear dynamic analysis with damped and undamped system

- Eigenvector
- LD Ritz vector

Hydrodynamic analysis

- Morison equation for the offshore steel framed structures
- Diffraction theory for the large offshore structures such as the concrete gravity and huge floating structures.

Time history earthquake analysis with seismic code spectrum
Impact dynamic analysis

- Impact dynamic analysis of large deformation elasto-plastic analysis can be carried out.

Coupled Dynamic Analysis of Offshore Wind Turbine

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.

Coupled Dynamic Analysis of Floating Offshore Wind Turbine

X-SEA Quasi-Static Mooring Analysis

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.

Dynamic Equation of X-SEA FOWT Motion

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 ULS & FLS from GH-Bladed & FAST 8

Post-processing of integrated design results for ULS and FLS from GH-Bladed and OpenFAST.

ULS

FLS