23 or from the input file/Matlab function provided by the user.
Orcaflex Wamit Input Full Difference QTFsOrcaFlex
Assessing marine technologies in ProteusDS is all. SummaryofKeyFeatures 3D, nonlinear, large displacement analysis Fully coupled tension, bending & torsion Accurate, efficient and proven FE formulation Robust line compression / snatch modelling External line-on-line clash & sliding contact Internal line-in-line impact & sliding contact Modelling of post-contact behaviour Linear & nonlinear elastic contact stiffness Line slug flow and free-flooding effects Nonlinear time domain (implicit & explicit) Linear frequency domain (1st & 2nd order) Constraints to fix or impose individual DoFs Line feeding (haul in and pay out nodes) Fully coupled vessel - line analysis Comprehensive vessel load modelling Multi-body hydrodynamic coupling Full sum and full difference QTFsOrcaFlex can import directly data which have been output by OrcaWave, AQWA and WAMIT. AQWA and WAMIT, you must enter at the time of import the reference.Sizing of a new build FPSO hull is an iterative optimization process, where the main dimensions of the FPSO are varied until the optimal size is found, within a defined input domain. AQWA, OrcaFlex, and WaveDyn. The current numerical tool. Creates the required input files and runs WAMIT, to calculate the wave diffraction, radiation, and nonlinear/linear hydrostatic effects.
Orcaflex Wamit Input Software Capable Of
Re, etc.) External functions admit user-defined calculations Time history data import for:- vessel motions- wave elevation- wind speed & direction SI, US or user-defined units Full and comprehensive context sensitive help Additional dedicated UI for building pipelay roller supportsGUI RESULTSMultiple simultaneous 3D views, results graphs & tablesWorkspace facility to manage windows Replay wizard to animate multiple simulations AVI file export of animations Results displayed at run time and / or simulation replay Results storage optimised to minimise file size GUI output can be:- graphical (time histories, range and X-Y graphs)- values (in Excel spreadsheet format)- statistical analysis (incl. The structural properties of the device that are needed as input into WAMIT.22.O OrcaFlexTechnicalSpecificationProfessional Software forProfessional EngineersProteusDS is a marine dynamic analysis software capable of simulating vessels, structures, lines, and technologies in marine environments. It is modern, customizable, and validated.
WAMIT outputs its results to a text file with an. Orcaflex, Nemoh and Wamit for the mooring and wave loading and OpenFoam. I have provided formal and informal input to energy technology developers in.ModificationMorison elements, to represent viscous dragMulti-level undo and redo when editing data Release during simulation of supports and constraints Properties report for compound objects Histogram collation across multiple simulations Coupled-object modal analysisVersion 10.1 (October-2016) Constraints object to fix, or impose, individual DoFs Frequency domain includes WF & LF calculated vesselsMid-line connections: mid-nodes connect to objectsMulti-threading improved for >64 processors or NUMA Direct tension / torque coupling Line added mass now a function of height above seabed Vertical current stretching option Time history files optionally stored in OrcaFlex Time history cycle histograms directly includedFeaturesHighontheDevelopmentListSee orcina.com/Support/OrcaFlex for more Features related to mooring analysis Diffraction analysis Aero-elastic modelling for wind turbines Spatial variation and spatial coherence for wind RestartsImproved lateral seabed modelling Thermal / pressure expansion & contraction in pipes Line results at nodes Software-based licencing Electronic software distributionModellingObjectsA wide range of objects, each very powerful, easily allows simple or complex models to be builtLINES Fully coupled bending, torsion and axial stiffness Bend Stiffener / Tapered Stress Joint model generation Centrifugal internal flow effects included Slug flow and free flooding options for line contentsMultiple 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 Rayleigh damping with or without geometric stiffness Line CofG may be displaced from geometric centre Pre-bend can be modelled (e.g.
Out file you have selected, as illustrated in the following figure:In this example, a choice may be made between the different calculation methods employed by WAMIT for the Newman QTFs and the full QTFs. The requested data page of the import vessel data form allows you to choose between the methods that are available in the. Choice of calculation methodsFor some types of data (load RAOs, Newman QTFs, full QTFs) WAMIT may offer results from various different calculation methods. The data are almost all non-dimensional, the main exceptions to this being acceleration due to gravity $g$, and WAMIT's length scale $L$, used to non-dimensionalise the data.
If this is successful, then OrcaFlex will convert the data from non-dimensional to the units prevailing in the OrcaFlex model, using WAMIT's length scale $L$ (converted to the length unit of the OrcaFlex model) and the current OrcaFlex values of $g$ ( acceleration due to gravity) and $\rho$ ( nominal water density), using the scaling factors defined in the WAMIT user manual. UnitsThe length unit in use in the file will be determined, if possible, from the value of $g$ and the knowledge that the unit of time is the second. Similarly, the control surface option is not available for the Newman QTFs.
Out file (which are relative to the WAMIT vessel origin) and the centre of gravity coordinates of the OrcaFlex vessel type (which are relative to the OrcaFlex vessel type origin). OrcaFlex deduces the position of this WAMIT vessel origin, relative to OrcaFlex's vessel origin, from the difference between the centre of gravity coordinates in the. Vessel axes and reference originsPosition vectors used for reference during import of hydrodynamic data from WAMITYou must ensure that the vessel type centre of gravity coordinates are set appropriately in OrcaFlex before importing WAMIT data.Almost all of the WAMIT data (with momentum-conservation QTFs being the sole exception) have their reference origin at WAMIT's vessel origin.
Providing datum rotations when necessary will allow the import process to transform WAMIT output so that it is correctly expressed using the OrcaFlex vessel axes.OrcaFlex sets the vessel type's RAO origins, QTF origin, and added mass and damping origin to be the coordinates of the WAMIT reference origin relative to the OrcaFlex vessel origin, with respect to OrcaFlex vessel axes. These are reference origins, phase origins, the rotational inertia matrix and the centre of buoyancy. Again, and for similar reasons, these values must be set before importing WAMIT data.WAMIT uses a horizontal reference frame for reporting its output, but some quantities that are imported into OrcaFlex need to be expressed using the OrcaFlex vessel axes.
OrcaFlex is not able to import such data: your WAMIT model must contain only rigid bodies.Displacement RAOs are imported in a straightforward way. Structural deformations and motions of hinged bodies. If so, then OrcaFlex will warn you of this, and you will need to set these reference origins yourself.WAMIT includes the capability to analyze generalized modes of body motion, which extend beyond the normal six degrees of rigid-body translation and rotation to allow e.g. Notes:In some cases, WAMIT does not output the horizontal position of the centre of gravity. OrcaFlex determines this by (i) expressing the WAMIT global origin relative to the WAMIT vessel origin (in body-fixed axes), using the values of XBODY, YBODY, ZBODY and PHIBODY in the WAMIT output file, (ii) adding the offset from WAMIT vessel origin to OrcaFlex vessel origin, which is found using the difference between the centres of gravity coordinates specified in WAMIT and in OrcaFlex, and (iii) using the vessel type datum rotations to express the position of the WAMIT global origin relative to the OrcaFlex vessel origin using OrcaFlex vessel axes.
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