ANSYS AQWA0 pages

ANSYS AQWA

ANSYS AQWA Diffraction
Product Features

Proven Technology for Design and Analysis of Mobile Offshore Structures
ANSYS® AQWA™ software is an engineering analysis suite of tools for
the investigation of the effects of wave, wind and current on floating and
fixed offshore and marine structures, including spars, floating production
storage and offloading (FPSO) systems, semi-submersibles, tension leg
platforms (TLPs), ships, renewable energy systems and breakwater design.
Projects today require that structure design and analysis be performed
efficiently in terms of time and cost. The powerful range of modeling
and analysis capabilities enables the rapid assessment of many design
alternatives, in particular early in a project, significantly reducing overall
project costs and timescales.

Wave Diffraction and Radiation
• t3-D panel method
• tMulti-body wave diffraction and
tradiation
• tForward speed
• tFull quadratic transfer function
(QTF) calculation for slow drift
teffects
• tSimulation of mooring and
physical connections through
user-defined stiffness matrix

Three ANSYS AQWA value-based packages are available to meet typical
analysis requirements: ANSYS AQWA Diffraction, ANSYS AQWA Suite and
ANSYS AQWA Suite with Coupled Cable Dynamics.

ANSYS AQWA Suite
Product Features

Included with all of the ANSYS AQWA packages is the Hydrodynamic
Diffraction analysis system, representing the first phase of the integration
of ANSYS AQWA technology into the ANSYS® Workbench™ platform. This
provides direct links to ANSYS® DesignModeler™ software, external CAD
geometry import, geometric parameterization and integrated meshing
technologies. In addition, the ANSYS AQWA Suite of products include the
Hydrodynamic Time Response analysis system, which is now exposed in
the ANSYS Workbench platform.
ANSYS AQWA Diffraction for Multi-body Diffraction Analysis
The ANSYS AQWA Diffraction product provides an integrated environment for developing the primary hydrodynamic parameters required for
undertaking complex motions and response analyses. Three-dimensional
linear radiation and diffraction analysis may be undertaken with multiple
bodies, taking full account of hydrodynamic interaction effects that occur
between bodies. While primarily designed for floating structures, fixed
bodies such as breakwaters or gravity-based structures may be included
in the models. Computation of the second-order wave forces via the full
quadratic transfer function matrices permits use over a wide range of

Geometry in ANSYS DesignModeler
software

Model imported into ANSYS AQWA
Diffraction software, meshed and
analyzed

Analysis Options
• tStatic and dynamic stability
• tMean equilibrium position for
t multi-body assemblies
• tFrequency-domain solution of
t significant and extreme linear
t response due to first-order wave
t and second-order, slowly varying
t drift effects
• tTime-domain simulation of
t extreme wave conditions including
t nonlinear hydrodynamic effects
t resulting from the variable wetted
tsurface
• tTime domain simulation of slow
t drift motions due to irregular seas
• tCoupled tension leg platform
t (TLP) tendon analysis, including
t stress and fatigue
• Computation and utilization of full
t quadratic transfer function (QTF)
t matrices for slow drift effects,
t including both sum and difference
t frequency components
• tPanel, slender tube or mixed
t models facilitated
• tFully coupled cable dynamic
t feature enabling mooring line t
t drag and inertial characteristics to t
t be included in the vessel motions
tanalysis