EVALUATION OF PLANING CRAFT MANEUVERABILITY USING MATHEMATICAL MODELING

Sa？etak Ship transportation is increasing globally as is risk of collision especially in congested areas is a main concern. Numerical modeling method is major simulation method to predict ship maneuverability. Ship maneuvering in calm water is an important topic to avoid collisions and leads to safe navigation. Therefore reliable ship maneuvering simulations are required for incident analysis and prevention. In recent time within the research community orientated towards ship hydrodynamics an increasing attention has been paid to simultaneous solution of the maneuvering of planing ship problem. The maneuverability of planing crafts has been the subject of many research projects during the last few decades. To assess the maneuverability of planing crafts at the early design stage, reliable simulation models are required. Traditionally, these tools have used empiric descriptions of the forces and moments on the planing craft’s hull. Ship maneuvering calculations, horizontal plane motion control and development of maneuvering simulators need a mathematical description of ship maneuvering. In the recent years, different mathematical models are suggested for maneuvering of displacement vessels that are capable of estimation of vessel maneuvers with acceptable precision. But simulation of planing craft maneuverability through mathematical model is not common yet and is the subject of future research. Maneuvering of planing crafts is influenced greatly by action of rudder. But research efforts have been to include the rudder action in the mathematical models of planing ship maneuvering. In this paper a mathematical model is developed for planing craft maneuvering that includes the rudder forces and moments. Different maneuvers are executed through the mathematical model. Simulations are validated by model tests. Finally the influence of rudder angle on maneuverability of planing ship is studied. The mathematical model and hydrodynamic coefficients presented in this paper can be applied for estimation of course control and turning ability of a planing craft in the early stages of design