The behaviour of any structure in water is different from its behaviour on land, thus we have hydrodynamic behaviour of structures. Most offshore structures have a perculiar hydrodynamic behaviour, and are subject to wind, ocean current and other environmental conditions.
Some tools like ANSYS Aqwa are used to calculate or simulate the hydrodynamic analysis. ANSYS Aqwa is a multi-body hydrodynamic program that utilizes three-dimensional radiation/diffraction theory for global loading and motion simulations. In other words, it is a tool for simulating wave and current as well as wind loads on floating and fixed offshore, wave energy systems and marine structures. It gives fast results compared to a CFD simulation, however, Aqwa is based on potential theory so no viscous terms are therefore included, except when introduced through external models such as for roll damping. ANSYS Aqwa is fully implemented in ANSYS Workbench providing a modern interface to develop and solve global models in contact with water. The pressure and inertial loading achieved with ANSYS Aqwa can be coupled to ANSYS Mechanical to investigate the stresses and deformations.
ANSYS Aqwa has a wide range of applications for marine operations and renewable equipment such as floating wind turbines and wave energy devices. Situations to be analyzed are wave impact on an offshore platform, motion between multiple floating objects in contact, lift operation, diffracted wave patterns around a structure and many more within the marine, renewable energy and offshore industries.
In version 17.0, the Aqwa module became included in the Mechanical Enterprise license, adding enormous value to the ANSYS customers.
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