The Wave Directions tree object enables the definition of a range or single wave direction to use in the Hydrodynamic Diffraction analysis and, optionally, a forward speed at which the structures move in the positive X-direction.

If Type is set to Single Direction, Forward Speed, you can enter a structure Forward Speed and a Wave Direction. In this case, only a single wave direction can be analyzed.

If Type is set to Range of Directions, No Forward Speed, waves are automatically created in -180 and +180 directions, and either the Interval or the number of intermediate directions (No of Intermediate Directions) can be specified. If a direction range is of particular interest, additional ranges or specific directions can be added.

If Type is set to Range of Directions, Forward Speed, you can enter a structure Forward Speed and perform the analysis over a range of wave directions. Waves are automatically created in -180 and +180 directions, and either the Interval or the number of intermediate directions (No of Intermediate Directions) can be specified. If a direction range is of particular interest, additional ranges or specific directions can be added.

To add Optional Wave Directions to analyses performed over a range of wave directions, select Single or Range from the Additional Range dropdown. For the Single direction, specify the Start Angle. For a Range of directions specify the Start Angle, End Angle, and either the Interval or No of Intermediate Directions.

Duplicated directions will automatically be removed; although the number of directions does not contribute greatly to the analysis time, there is a limit imposed of a total of 41 directions for any one structure.