Roll damping by free surface tanks with partially raised bottom
Abstract
The influence of free surface tanks with partially raised bottom on ship roll damping was discussed. The purpose of the introduction of a cambered shoal in the rectangular free surface tank was explained. The effect of a roll damping tank on the rolling motion of the ship was shown qualitatively by a simplified theoretical treatment. The results of an extensive series of bench tests with tank models were presented. On the basis of the theoretical approach mentioned above and the test results, a practical example was worked out. It was concluded that the introduction of a partially raised bottom in the rectangular free-surface tank contributes to ship roll damping, especially in ships with relatively low metacentric heights.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- December 1974
- Bibcode:
- 1974STIN...7610338V
- Keywords:
-
- Damping;
- Roll;
- Ships;
- Tanks (Containers);
- Amplitudes;
- Camber;
- Equations Of Motion;
- Graphs (Charts);
- Rolling Moments;
- Engineering (General)