Seakeeping Dialog - RAO Output Tab

Added Mass

The forward speed (total) added mass coefficients

Damping

The forward speed (total) damping coefficients (not including non-linear roll damping coefficients).

Vertical RAO's

Surge, Heave and Pitch - Amplitudes and phase leads.

Lateral RAO's

Sway, Roll and Yaw - Amplitudes and phase leads.

Vertical Forces

Surge force, Heave force and Pitch moment - Amplitudes and phases.

Lateral Forces

Sway force, Roll moment and Yaw moment - Amplitudes and phases.

Added Resistance

Added resistance in waves.

Dynamic Loads

Vertical shear force and bending moment; Horizontal shear force and bending moment and torsional moment - Amplitudes and phase leads.

Tabulate against wavelength/LPP

By default, tabular output is given against wave frequency. Check this box to tabulate values against .

Coefficient

The coefficients that can be plotted are:

A22, A24, A26, A33, A35, A42, A44, A46, A53, A55, A62, A64, A66

B22, B24, B26, B33, B35, B42, B44, B46, B53, B55, B62, B64, B66

X-Axis

The graphs can be displayed against wave frequency or wave length.

Speed

Each graph contains the hydrodynamic coefficient for a single speed. Select the required speed from the drop-down list

Alternatively, the first item on the list is "zero-speed", which will plot the coefficient, but without the inclusion of speed correction terms.

Since the zero-speed terms are independent of heading angle, only a single graph is plotted and the heading cell is ignored.

Headings

Each graph can include any/all of the wave headings defined on the Dynamic Positioning Data - General Tab page. Select any/all from the drop-down check list.

RAO

Cartesian graphs of the six motions and six wave exciting forces/moments can be added to the report. Choose one from the drop-down list

X-Axis

The graphs can be displayed against wave frequency or wave length.

Speed

Each graph contains the RAO's/Forces for a single speed. Select the required speed from the drop-down list

Headings

Each graph can include any/all of the wave headings defined on the Dynamic Positioning Data - General Tab page. Select any/all from the drop-down check list.

Add

Adds a single graph to the grid (and hence report)

Delete

The Delete button is enabled when you select a number of rows from the grid control (by clicking on the numbers in the left-hand column). Highlighted rows are then deleted by clicking on the button

Up

The Up button is enabled when you select a number of rows from the grid control (by clicking on the numbers in the left-hand column). Highlighted rows are then moved up the grid by clicking on the button.

Note:
If the first row is selected, then the button is not enabled, since the rows cannot be moved.

This is useful for re-ordering the graphs that appear in the report.

Down

The Down button is enabled when you select a number of rows from the grid control (by clicking on the numbers in the left-hand column). Highlighted rows are then moved down the grid by clicking on the button.

Note:
If the last row is selected, then the button is not enabled, since the rows cannot be moved.

This is useful for re-ordering the graphs that appear in the report.

RAO

Contour plots of the six motions can be added to the report. Choose one from the drop-down list.

X-Axis

The contours are draw with the heading as the Y-axis. The X-Axis can be displayed against wave frequency or wave length.

Speed

Each contour contains the RAO's for a single speed. Select the required speed from the drop-down list.

Criteria / Minimum

Minimum criteria for contour plot.

Criteria / Step

Increment for contour plot.

Criteria / Maximum

Maximum criteria for contour plot.

Add

Adds a single contour to the grid (and hence report)

Delete

The Delete button is enabled when you select a number of rows from the grid control (by clicking on the numbers in the left-hand column). Highlighted rows are then deleted by clicking on the button

Up

The Up button is enabled when you select a number of rows from the grid control (by clicking on the numbers in the left-hand column). Highlighted rows are then moved up the grid by clicking on the button.

Note:
If the first row is selected, then the button is not enabled, since the rows cannot be moved.

This is useful for re-ordering the contours that appear in the report.

Down

The Down button is enabled when you select a number of rows from the grid control (by clicking on the numbers in the left-hand column). Highlighted rows are then moved down the grid by clicking on the button.

Note:
If the last row is selected, then the button is not enabled, since the rows cannot be moved.

This is useful for re-ordering the contours that appear in the report.