Recomendações para o estudo das ondas geradas por embarcações utilizando o maxsurf resistance

Abstract

Vessels operating at forward speed tend to generate wave trains on the water surface that propagate in different areas in relation to the vessel's trajectory. The energy dissipation resulting from waves generated by vessels can affect other surfaces and cause environmental impacts, in addition to impacting navigation safety, especially in restricted water areas such as canals or rivers. The increase in the flow of shipments on Amazon rivers makes the study of this problem relevant in the region. Among the possible complications, we can mention the erosion of river banks, which can affect the river bed and contribute to the transport of sediments, causing problems in navigation and riverside communities. Furthermore, the wave trains generated can interact with swimmers or vessels, causing lower risks of accidents. This work aims to introduce the problem of wave trains generated by vessels, analyzing the use of the slender body method available in the Maxsurf Resistance software, to represent the free surface of the water. For this, the case study of a vessel commonly used to transport passengers in the Amazon region, known as an express, was considered. The use of the method was introduced by carrying out an analysis of the various input parameters required. Subsequently, the use of the method was demonstrated to verify the effects of varying speed and boarding draft on generated wave trains. The results obtained demonstrated the need to carry out previous analyzes to select the appropriate simulation parameters when using the slender body method. The increase in forward speed and draft is related to the increase in the height of the wave trains generated. It is expected that the present work will serve as a basis for the use of the slender body method in the evaluation of waves generated by other vessels, offering suggestions for using it according to its applicability limits.