Computational optimization of stability, propulsion and manoeuvrability of a riverine vessel

The present article summarizes the study of the stability and the hull integration with the propulsion system of a riverine support vessel, in order to optimize the efficiency of the propulsion plant and improve its manoeuvrability in its operations area. The relevance of this study originated from the fact that the vessel originally was a Tug Boat converted into a mother vessel to transport troops. Other vessels of the same type were used in operations to control public order, due to the lack of methodology in the conversion process the end results is not optimal. To initiate the work, it was necessary to forego a field review that permitted to measure the vessel in 3D; modelling and executing the estimation of weight and components of the vessel using SWBS (Ship Work Breakdown Structure), as well as determining the location of its centre of gravity (CG), work performed using GHS software (General Hydrostatics) and Rhinoceros. An important evaluation for the criteria of stability was applied using standards such as DDS-079 USN and 046CFR170 USCG. Once a study was undergone, the resistance was predicted using systematic series with the NAVCAD software, as well as the optimal propeller selection and evaluation in terms of fuel consumption and operating autonomy. In regards to the controllability system, a study was performed utilizing the current rudder in which recommendations were formulated in achievement of the appropriate one, better located and which absorbed the propeller turbulence, as well as state of the art recommendations to improve manoeuvrability. The results turned to a stable vessel and the improvement in the propulsion system efficiency, which showed an increased in speed, cavitation reduction and longer range. The applied rudder remarkably improved manoeuvrability as well as course-keeping.