- #Orcaflex torsion generator
- #Orcaflex torsion full
- #Orcaflex torsion free
Readable, structured and self-documenting text files. 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. Add text labels at any point in 3D space or attach to objects. 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. Fully interactive native user interface. Direct interface to standard controller codes (e.g. #Orcaflex torsion generator
Generator control options (constant / externally calculated). Blade pitch control via external function. Flexible blades capturing aeroelastic coupling effects. 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. Links (springs) with linear or nonlinear stiffness & 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. Added mass as a function of submergence. 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. added mass and damping with convolution. #Orcaflex torsion full
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. Line drag and lift coeffs can vary with Re or seabed proximity. Partially submerged lines (eg, floating hoses) handled robustly. Wake Interference (Huse, Blevins,user specified). Hydrodynamic, aerodynamic and user-defined applied loads. Line feeding for pay out and haul in of nodes. Line Contact for pipe-in-pipe, piggybacks, J-tube pulls, bend stiffeners, sliding connections, etc., allowing smooth modelling of large relative axial motion including friction. Line Clashing for external clash modelling between lines. 
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. 3D hysteresis model available for bending, axial and torsional effects. Axial, bending and torsional stiffness can be nonlinear. Bending stiffness, drag and added mass can be non-isotropic. Multiple coatings and linings can be defined. #Orcaflex torsion free
Slug flow and free flooding options for line contents.Centrifugal and Coriolis internal flow effects included.
spool pieces) now with visualisation tool Bend Stiffener / Tapered Stress Joint model generation.Fully coupled bending, torsion and axial stiffness.
Experimental results show that, our simplified algorithm can reduce more than 64.5 % of the calculating time on the premise of assuring the accuracy and numerical stability. To speed up the model’s solving process and realize the real-time simulation, we analysed the variables’ variation rates in the governing equation, identified the invariants, fast variables and slow variables, then proposed a novel simplified algorithm by adopting different time steps for their calculation. We built the mooring line’s dynamics model based on Lumped-Mass Method (LMM) and used 4th order Runge-Kutta to solve it However, the huge amounts of calculation in the model’s solving seriously hindered its application in AHS. Communications in Computer and Information ScienceĪs an important component in Anchor Handling Simulator(AHS), the mooring system’s modeling and simulation have great impact on the AHS’s physical realism, behavioural realism and operating environment.
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