In this thesis the computer software OrcaFlex is used to perform the riser analysis. WAVE HEIGHT AND PERIOD PLOTTED FROM MANUALLY LOGGED.
OrcaFlex is a 'non linear time domain, finite element software program principallyused for the static and dynamic modelling of systems used in offshore constructionenvironment, including marine risers of the flexible and rigidtypes, mooring systems and towed array's'
Produced by Orcina it is able to run on any PC compatiblecomputer that has Windows 2000, XP or Vista Theprogram uses Lines, 6D Buoys, 3D Buoys, Vessels, Tethers, Winches,links whch you can add into an offshore environment. The mainphysical elements of the items can be modelled.
Environmental effects such as the Seabed profile, differenttypes of Wave specrums, Wind and currents can be applied to themodel. Initially the Model performs a Static calculation, andassuming the model has been made following the correct practice itshould converge, which yields a static condition *.dat file thatcan be used in design.
The next level of the simulation is to run a dynamic simulation,which yields a *.Sim file
From the Sim file you are able to produce graphs giving dynamicinformation on Forces, Spatial Positions, Accelerationsand Velocity, Dynamic response, and other important values neededto enable greater engineering insight to be gained about thecomponent's being modelled. VIVVortex induced vibration can also be modelled using additionalsoftware modules.
It is possible to import shaded 3D Graphic shape files, toincrease the visual impact of the simulations.
ExternalReference
1. OrcaFlex manual
2. www.orcina.com
OrcaFlex is the world’s leading package for the dynamic analysis of offshore marine systems, renowned for its breadth of technical capability and user friendliness. OrcaFlex also has the unique capability in its class to be used as a library, allowing a host of automation possibilities and ready integration into 3rd party software.
OrcaFlex is in use by over 260 clients, mainly in the offshore engineering business, with others in seismic, defence, ocean engineering, oceanographic research, aquaculture, compliant marine renewables and related fields.
OrcaFlex has a very wide range of applications, including:
Risers
Tensioned marine risers
Steel Catenary Risers (SCRs)
Hybrid Riser systems
Flexible Risers
Umbilicals
Moorings
Spread mooring systems
Jetty mooring systems
Turret (external and internal) moored systems
Single Point Moorings
Oceanographic mooring systems
Aquaculture moorings
Installation Analysis
Pipelay analysis
Anchor and mooring deployment
Riser installation
Cable lay dynamics
Through-splash zone deployment
Deep water installation of subsea hardware
Seabed plough deployment and operation
Offshore lift dynamics
Deflect-to-connect and cross-seabed pull-in
J-Tube pull-in
Stab and Hinge simulation
Buoy Systems
CALM buoys
SPAR buoys
Mid-water arches
Metocean buoys
Hose Systems
Under-buoy hoses
Offloading hoses
Floating hoses
Towed Systems
Towed bundle dynamics
Seismic arrays
Towed bodies
Defence
Minesweeping studies
Ship-to-ship replenishment
Dunking sonar modelling
Helicopter landing systems
Floating protection booms and nets
Renewable Energy
Wave power systems
Offshore wind farm installation
Wind turbine modelling
Power cable take-off
Floating wind turbines (with optional FAST coupling)