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Frequency domain solutions are very fast and can help determine whether cable dynamics need to be considered as part of the analysis. For the dynamic response the capability is available within both the frequency domain and time domain. The feature is available for both static (drag effects) and dynamic analyses. This has the added feature of including drag loads and added mass effects of the line, something that can be significant for the long lengths of line encountered in deep water applications.

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Bending moment/shear force calculation including forward speedДЄs an optional extra, it is possible for ANSYS AQWA to include the effects of line dynamics by modeling the mooring lines as a series of rod elements.It can perform a range of tasks including: The ANSYS AQWA-Graphical Supervisor is the key module within the suite. Powerful Modeling and Results Interrogation If the mechanical connections are represented as tubes these are allowed to become wholly or partially submerged and Morison types forces are calculated. Articulations can have stiffness, friction and damping included. This permits the modeling of combined hydrodynamic and mechanical dynamic configurations. In the design of breakwaters and how they affect mooring systemsДЄNSYS AQWA has the ability to handle articulated structures, up to a maximum of 50 structures and 50 articulations. This image shows the shielding effects of a pier adjacent to a ship, an important aspect Forward speed effects can be included in the interaction. A typical application would be shielding effects. The structures can be articulated, connected by cables or independent. Thus the motions of one structure can affect the motions of another. Transportation of large offshore structures using barges/shipsДЄNSYS AQWA can take account of hydrodynamic interaction between adjacent vessels and structures.Discharging landing craft from mother ships.Simulation of lifting operations between floating vessels.Concept design and analysis of wave and wind energy systems.Multiple body interactions during LNG transfer.Calculation of the shielding effects of ships and barriers.Design and analysis of mooring systems including intermediate buoys and clump weights.Total Capability for all Hydrodynamic ApplicationsДЄNSYS AQWA is not just for moorings or diffraction/radiation but is a general purpose hydrodynamics analysis tool providing enormous flexibility to address most types of problem. Alternatively, suitably defined external CAD geometry may be directly imported into ANSYS AQWA hydrodynamic diffraction. This geometry can then be imported into the new ANSYS AQWA hydrodynamic diffraction analysis system that includes its own meshing capabilities.

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This can be achieved in one of several ways.ДЇor ship shaped vessels there is an automated mesh generator that works from the shipвЂ™s lines plan (or offsets).ДЇor more general vessel forms the ANSYS DesignModeler may be utilized to either generate the geometry directly, or to import geometry from a wide range of CAD systems. A standard panel discretization of the hull is utilized in the radiation/diffraction stage of the simulation (and may also be used in subsequent solvers, such as the static and dynamic time domain solutions). Modeling FlexibilityДЇor large floating bodies ANSYS AQWA requires a description of the hull form. In addition an optional facility for coupled cable dynamics is available with the static and dynamic solvers (in both the frequency and time domain) to provide more rigorous modeling of the loading and response of mooring systems, especially in deep waters. Hydrodynamic load transfer to a structural finite element analysisДЄ graphical interface provides the common tool to facilitate visualization and results processing for the AQWA system.Non-linear time domain with large amplitude regular or irregular waves.Time domain with irregular waves including slow drift.Static and dynamic initial stability including the effects of mooring systems and other physical connections.Functionally it may be split into six operations: Ansys Convergence Conference PresentationsДЄNSYS AQWA is an integrated system for undertaking hydrodynamic and mooring analyses.

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