Orcaflex Slug Flow Model Free Flooding Options
A 1/9 scaled section model was made and arranged in the state of incline. The obtained results from the global analysis are then implemented into a finite element model in ABAQUS to determine the stress-history curves of each steel strips layer.In particular, Vortex Induced Vibration (VIV) generated on each riser was focused. Fully coupled bending, torsion and axial stiffnessFirstly, given a specific working condition of MSFP, the dynamic responses of MSFP are calculated through OrcaFlex. Centrifugal and Coriolis internal flow effects included Slug flow and free flooding options for line contents Multiple coatings and linings can be defined Equivalent pipe setup tool Bending stiffness, drag and added mass can be non-isotropic Axial, bending and torsional stiffness can be nonlinear 3D hysteresis model available for bending
Centrifugal and Coriolis internal flow effects included Spool pieces) now with visualisation tool Pre-bend can be modelled (e.g. Seabed model for SCR fatigue analysis, either within Orcaflex. Bend Stiffener / Tapered Stress Joint model generationinvolved, such as slug flow, vortex-induced vibration, and SCR-seabed interaction. From the model test, it was shown that the amplitude of the VIV was larger with the buoyancy modules than that without the modules.
Non-isotropic Coulomb friction with seabed & elastic solids Clumped line attachments, drag chains or flex joints Line CofG may be displaced from geometric centre Rayleigh damping with or without geometric stiffness
2nd order (low freq.) difference QTFs: full and Newman Choice of finite element or analytic catenary representation Compressibility specified by bulk modulus Water entry / exit slam loads (per DNV H103, RP-C205) Added mass as a function of submergence or height above seabed
Fluid loads calculated based on the instantaneous wetted surface SPAR option for co-axial cylinders, each with own properties Sea state RAOs (vessel wave shielding, wave jetting, etc) Multi-body hydrodynamic coupling between floaters loads from attached lines (coupled analysis) 6DoF ‘other’ linear and quadratic damping
Winches with several length or tension control options Drawing option for visualisation purposes Trapped water option for moonpool modelling Plane, cuboid, cylinder (solid/hollow), & bellmouth options Shapes with friction for line & buoy contact Coulomb friction with seabed and elastic solids
Aerodynamic loading via Blade Element Momentum (BEM) model Dedicated horizontal-axis turbine object Imposed motion via time history or externally calculated Allow individual degrees of freedom for other objects to be constrained
Direct interface to standard controller codes (e.g. Generator control options (constant / externally calculated) Blade pitch control via external function
Moving camera option to track large-scale object motion Shaded has perspective, lighting, hidden line, etc. Visualisation as wire frame and/or shaded graphics Separate fully interactive user interface for OrcaWave
Compare files with built-in or user-specified compare tools show / hide, move and locate objects or groups copy / paste objects or groups within or between files
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