جستجوی مقالات مرتبط با کلیدواژه « اسلاشینگ » در نشریات گروه « مهندسی دریا »

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.

Sloshing is one of the interesting field of study for many researchers. This physical phenomenon occurs in fuel tanks having free surface fluid. Researchers can have a look on it from theoretical and engineering point of view. Free surface in tanks may cause instability of the vessel. In this paper، analytical discussion for this occurrence has been presented، and principle mode shapes of sloshing of fluids in cubic tanks are illustrated. Governing equations are potential fluid، and the effects of surface tension have been neglected comparing with the wavelength inducing from sloshing. All these assumptions are logical ones، consisting with reality. Knowing principle mode shapes، one is able to derive other mode shapes by using a linear combination. This paper presents figures in order to make this phenomenon more sensible foe the user.