Seaway is a frequency-domain ship motions PC program based on the linear strip theory to calculate the wave-induced loads, motions, added resistance and internal loads for six degrees of freedom of displacement ships and yachts, barges, semi-submersibles or catamarans, sailing in regular and irregular waves. The program is suitable for deep to very shallow water. Viscous roll damping, bilge keels, anti-roll tanks and linear springs can be added. Work of very acknowledged hydromechanic scientists (like Ursell, Tasai, Frank, Keil, Newman, Faltinsen, Ikeda, etc.) has been used, when developing this code.
- Generalized hull form definition, which now also allows a consistent analysis of tunneled sections.
- Various import filters available of third-party hull form formats.
- Export of Seaway-results to XML-format, including spring forces (new) and response envelopes. Results can be viewed and printed using the OCTOPUS-Report tool.
- 3D-animation of ship motions by combination of RAO's with a large variety of sea state definitions.
- Hydrostatics and still water bending moments and shear forces.
- Resonance periods in al modes of motions.
- Wave forces and moments.
- Absolute and relative ship motions, velocities and accelerations in waves.
- Mean added resistance in waves.
- Shear forces, torsion moments and bending moments in waves.
- Short-term response statistics such as energy distributions, significant amplitudes and average periods.
- Probability and number per hour of exceeding threshold values used to study the effects of green water, propeller racing or slamming.
As an example of its capabilities, a few comparisons of experimental data of a fast cargo ship model with Seaway results are presented above.
- A database with over 120 scalable hull form files.
- Direct check of hydrostatics during hull form and loading condition definitions.
- Large variety of effects can be modeled, such as:
- Springs.
- Different viscous roll damping options.
- Free surface anti-rolling tanks.
- Arbitrary roll moment curves.
- Logical sub-division of input parameters with defaults per data set.
- Refreshment of geometry-dependent input with one click on a button.
- Robust input data checks, warnings and error handling.
- Add-ons such as the import of loading conditions from third party software (loading computers, CAD-systems, stability packages)
Many technical reports and papers in which Seaway was used can be downloaded here.