Resistance

CHAPTER ONE

INTRODUCTION

1.1

Background of Research

Naval architecture task is to ensure that, within the bounds of the other design requirement, the hull form design of propulsion and the procedure will be the most efficient in terms of hydrodynamics. The final test of the ship will perform at the required speed with minimum of shaft power, and the problem is to achieve the best combination of low resistance and high efficiency propulsive. In general, this can only be achieved by matching precisely the hull and propeller

In general, the basic contractual obligations are placed on the dock that ship must reach or achieved a certain speed with particular strength in the good weather on trial and for this reason smooth water performance or calm water is very important.
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Forecast resistance vessel is fundamental topics of interest to naval architects. Hydrodynamic’s been interested in determining the laws of physics related to the ship resistance and speed characteristic. Due to the complicated nature of flow around the ship hull, a satisfactory analytical method relating speed and powering requirement to hull form has not yet been developed. Generally, there are many methods can be used to determine the ship’s resistance. According to Harvald (1983), these methods can be divided into four groups which namely: 1) Model experiments 2) Standard series of experiments 3) Statistical methods 4) Diagrams Model testing is still the most accurate and reliable method but the others may only be used to predict ship resistance between certain limits or only for a ship that comparative data on these groups to forecast. Have similar particulars to such group. For the purpose of this study, only three methods of ship resistance prediction will be discussed in connection with the three groups are shown above. These methods are:

1) Van Oortmersen’s method 2) Holtrop’s and Mennen method 3) Schneekluth’s method

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1.2

Project Background

The main