The effect of varying prismatic coefficient (Cp) and displacement volume on hull resistance of fishing vessel

Abstract

There is a need to reduce the resistance of the fishing vessels. This is to reduce the economic costs incurred by the fisherman. The research is about the designation of hull boat by modifying the hull form for fishing vessel to get the minimum resistance or reduce its drag in water. In design world, one of the challenges faced by naval architecture is to select the best hull form to minimize the resistance. The main objective for this research is to design the best shape of hull boat to achieve the minimum resistance. By using the Maxsurf Professional 13 Software, it can be obtain or predict the resistance and power requirement and for the new design of optimal hull form will be produced. There are several methods in Maxsurf Professional 13 software which is Holtrop method, Compton method, Fung method, van Oortmerssen method, and Series 60. The suitable method that has been chosen for this research is Holtrop method. Holtrop method is one of the techniques widely used in prediction of resistance of displacement and semi-displacement vessels. Like all methods, however, this technique also has the own limitation. Holtrop and Mennen method is limited to a suitable range of hull form parameters. In their approach to establishing their formulas, Holtrop and Mennen assumed that the non-dimensional coefficient represents the components of resistance for a hull form. It might be represented by appropriate geometrical parameters, thus enabling each component to be expressed as a non - dimensional function of the sealing and the hull form. The findings are presented and analyzed with hydrostatic calculation after the design of hull form defined. The best hull form that chosen in minimum resistance is by decreasing value of Cp compare with the parent hull while increasing value of displacement volume. By using this method, the hull can be modified without changing the principal dimensions of the vessel. That slightly modification of the hull will minimize the resistance and enables reduced fuel consumption.