Numeric Resistance Analysis of New Hull Design for Amphibious High-Speed Craft
Romadhoni 1, a), Fazrian1, b) Husnul Khotima 1, c) Suzdayan 2, d) and Aprizawati2, e)

Polytechnic of Bengkalis

Abstract

Amphibious High Speed Craft (AHSC) is a new type of water and land transportation model, which is currently being designed for special purposes. In planning the analysis, resistance is one of the main factors that can be analyzed. The amount of power is of course greatly influenced by fuel consumption while sailing. The Amphibious High Speed Craft (AHSC) model optimization design which chooses a small resistance value is the focus point in the design process. In this research, the total resistance optimization method has been carried out on a numerical basis. The main parameters for the design of the flat plate hull, planing hull and cathedral hull models have the same displacement of 1,725 tons. From the calculation results can be obtained ratio of pressure and frictional resistance to total resistance is about 16% and 60%, respectively, up to Fn=0.8, but becomes 60% and 75%, respectively, at the highest Fn as a result of increasing the pressure component, which was most likely caused by the large cooling of the free surface around the Amphibious High-Speed Craft (AHSC) hull. The flat plate bow hull design and the planing bow hull design have greater resistance to impact and pressure compared to the cathedral bow hull design. The total bow resistance of the cathedral hull is 22.22% and 3.46% lower than the flat plate and planing hull bow designs respectively at service speed.

Keywords: Amphibious, resistance, numeric, design, high speed craft

Topic: Hydrology