Experimental Study of Sloshing Effect on Ship Motions in Regular Waves

Given the increasing importance of vessels carrying liquefied natural gas (LNG)، the high cost of incidents and also projects related to the design and construction of LNG transport vessels requires further investigation of fluid sloshing inside tanks of these vessels. This paper، reports the towing tank، equipped with a wave-maker، test results on a one-to-176 model of a product carrier with a rectangular tank exposed to head seas. This type of sloshing test in which the tank is installed within the ship model is one of a kind. Wave amplitude has a major effect on the amplitude of the vertical displacement (heaving) of the vessel. On the other hand، the test results show that the sloshing water inside the tank increases the range of heave and pitch motions of the vessel. However، in most frequency ranges، with increased wave amplitude، sloshing effect is such as a damper for the heave motion of the vessel.