On the Ship Motion Test in Regular Beam Waves at Tsu Ship Model Basin

Abstract

The model test systems on ship hydrodynamics were developed from the viewpoint of Laboratory Automation at Tsu Ship Model Basin. The auther joined in developing these systems and accomplished the ship motion test system in Waves (SMW). In order to confirm the accuracy of the test results obtained on this system, ship motion tests were carried out in head, beam and following waves with 5-meter model ship of the S-175 container ship design which was the subject of the computer studies on ship motions in 15th ITTC. The test results in head and following waves showed that these coincide with the results of experiments already published. But the test results in beam waves did not agree with the theoretical calculation by New Strip Method. Therefore, the ship motions in regular beam waves were calculated with Salvesen-Tuck-Faltinsen Method and compared with the our test results. Consequently it was verified that the results of ship motion test in regular beam waves carried out at Tsu Ship Model Basin coincide with the theoretical calculation by STF method concerning to the gains and the phases of the frequency response functions.