Descrição de embarcações regionais rápidas comuns em Parintins (AM) e estudo da dinâmica de uma embarcação do tipo expresso usando ANSYS AQWA

Abstract

In the Brazilian Amazon, there are regional vessels that tend to move fast and are subject to operational challenges such as instabilities and interactions with waves that may occur occasionally. However, in order to contribute to the development of safer high-speed regional vessels, it is still necessary to know more about the existing vessels and study their hydrodynamic behavior. In this context, this work aims to describe some of the most common fast regional vessels in the State of Amazonas, considering the city of Parintins as the study site, and to evaluate the dynamics of a regional vessel during its interaction with regular waves. To carry out the first part of the study, a survey of representative regional vessels was carried out. Therefore, a longitudinal expresso-type passenger transport vessel, which usually sails on the Manaus – Parintins route, was considered in order to evaluate its response under various regular wave conditions using the Ansys Aqwa® software. The vessel's movements were researched in the frequency and time domains, using the Hydrodynamic Diffraction and Hydrodynamic Response modules, respectively. Comparative analyses were performed to evaluate the effects of different wave incidence angles on the resulting heave, roll and pitch motions of the vessel. The frequency domain analysis allowed finding the motion resonance conditions of the vessel floating freely. On the other hand, the results obtained in the time domain allowed demonstrating the use of the software to simulate, in a simplified manner, the temporal evolution of the displacements, velocities and accelerations of the vessel, for some operating conditions with forward speed. Considering the simplifications made in the potential flow theory as well as the need to validate the time domain approach, this work can serve as an example to extend the use of the Ansys Aqwa® software in the study of other regional vessels..