Avaliação da manobrabilidade de uma embarcação com base na substituição do seu sistema propulsivo convencional por um sistema propulsivo azimutal

Abstract

In this dissertation a study was developed on the difference observed in the maneuverability of a vessel when we replace its conventional propulsion and steering system, with thrusters and rudders, by azimuthal propulsion systems. Numerical simulations were performed in the time domain, of the maneuvering equations in the horizontal plane for conventional propulsive and steering systems with two rudders and two thrusters, for the DTMB 5415 hull. Simulations were then performed with the conversion to propulsive system with two azimuthal thrusters. Performance analyses of the ship and the data extracted from the simulations were performed comparing the parameters of the turncircle and zig zag curves. Corrections were also made to the hydrodynamic coefficients due to the shallow water effect and new simulations were performed for each propulsion system configuration. The same behavior was observed in both deep and shallow water conditions. The azimuthal propulsion system presented better performance in the execution of the turncircle curve while the conventional system presented better performance in the execution of the zig zag curve.