A revista de periódicos brasileira Marine Systems & Ocean Technology (MS&OT) de Estrato B3, publicará o artigo intitulado, "Preliminary study about the wave influence on the ship hydrodynamics" trata do desenvolvimento de um modelo da dinâmica de um návio teórico e seu comportamento frente a influência de forçantes externas, sob autoria de Amanda Armudi, Wiliam C. Marques, Jorge F. C dos Santos, Lucas S. Bravo, E. H. Fernandes e Pedro V. Guimarães.
O resumo do artigo encontra-se abaixo:
"Preliminary study about the wave influence on the ship hydrodynamics"
The computational modeling is an important tool that can be used to assist the development of engineering projects. In this work a two-dimensional numerical model, under development at the Universidade Federal do Rio Grande, is used to describe the ship hydrodynamics (using three degrees of freedom) and understand the behavior under variation of: thrust produced by the engine and effects of external forces, focusing in wave influence. This work is based on the development of the numerical model to investigate the ship hydrodynamics using three degrees of freedom through the Lagrangian Mechanics. The thrust is represented in exponential form increasing or decreasing over 30 hours of numerical simulation, on the other hand, the wave properties are obtained from a numerical model SWAN for the coastal region adjacent to the Patos Lagoon.
The vessel velocity is function of the thrust and for the both simulations some variations are observed for the two components during the first hour of simulation. During this period of simulation, the variation of the initial velocity favors the more effective action of inertial forces. After 1 hour of simulation, the thrust and the ship velocity reaches a period of stabilization. During this period, the influence of the external forces associated with the wave and drag effects are observed, in this way the effects of pressure gradients become important causing increasing (reducing) of the ship velocity according with the increasing (reduction) of the wave velocity. On the situation with the thrust decreasing, the variations on the x and y components are not observed. On the other hand, for the situation with the increasing thrust the variations on the x and y components reflect on lateral deviations of the ship trajectory.
Keywords: numerical modeling; vessel; thrust