The main activity of the towing tanks is related to investigation of hydrodynamic performance of ships. This includes resistance, propulsion, seakeeping in head and following seas, and directional stability tests with free running models.
The tanks are equipped with two carriages: One for towing up to 10 m/s for traditional calm water tests and a second carriage for seakeeping tests and other tests performed with fixed or free-running models. Details about the seakeeping carriage are given below.
Towing tanks I and III
Tank I and III can be used simultaneously and also as one long tank (I+III) by removing a gate. Both regular and irregular waves can be simulated. The tanks are equipped with two carriages: One for towing up to 10 m/s for traditional calm water tests and a second carriage for seakeeping tests and other tests performed with fixed or free-running models. In tank I+III either of the two carriages can be used.
Main tests performed in towing tanks I and III
- Resistance, open water, propulsion tests, 3D wake measurements
- Seakeeping tests (motions, sea loads, slamming, whipping, active control)
- Manoeuvring (zig-zag tests, Planar Motion Mechanism PMM tests)
- Directional stability tests
- Crabbing tests
- Dynamic positioning tests
- Ship-Ship interaction tests
- Forced motion tests
- Lifeboat drop tests
- Measurement of current forces on offshore structures
- Measurement of forces and moments in six degrees of freedom
- Measurement of displacement in six degrees of freedom
- Propeller blade loading measurements
- Six-component propeller shaft measurements
- Propeller nozzle loading measurements.
- Tests using yacht dynamometer
- Various Pod / Azimuth thruster tests
- High speed video recordings (above and under water)
Towing tanks and carriages data