Abstract
ABSTRACT This paper studies the effect of material on the hydro-elastic behaviour. The geometry of flexible propeller changes due to hydrodynamic and inertial forces acting on the propeller. By using prepared software (called HYDRO-BEM and ELASTIC-FEM) the hydro-elastic features of the propeller made of various materials are analyzed. In the software the hybrid boundary element and finite element methods are used. First, the load acting on the propeller is determined by using the BEM and deformed propeller geometry is then obtained by the FEM. In the next step, the load on the deformed propeller is determined by the BEM and a new shape is obtained. The iterative procedure is repeated till the blade deflection and hydrodynamic characteristics (thrust, torque and efficiency) of the propeller become converged. Four different materials are examined. It is concluded that the hydro-elastic behaviour of the composite propeller is strongly affected by its flexibility due to light material.
Highlights
Marine propeller is a lifting body which generates thrust to overcome ship’s resistance
In operating conditions the geometry of the flexible propeller will be deformed due to hydrodynamic loads
A fluid-structure interaction in case of flexible marine propellers made of various materials have been analyzed by using the combined (BEM-finite element method (FEM)) software
Summary
Marine propeller is a lifting body which generates thrust to overcome ship’s resistance. This software uses the BEM including boundary layer theory to determine the hydrodynamic analysis of marine propeller. In this paper the effect of elastic deformation on the propeller performance such as its efficiency, thrust and torque coefficients is examined for various materials by using the hydro-elastic analysis.
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