© 2017 IJSRST | Volume 3 | Issue 7 | Print ABSTRACT The blades of a helicopter are long, narrow airfoils with a high aspect ratio, a shape that minimises drag from tip vortices. They contain a degree of washout that reduces the lift generated at the tips, where the airflow is fastest and vortex generation. Rotor blades are made out of the variety of materials, including aluminium, composites, and steel or titanium, with abrasion shields along the leading edge. The helicopter rotor hub is

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... by the engine, and the rotor blades are attached to the centre. The motion of blade is controlled by the helicopter rotor system. The main rotor blade mainly affected by the air flow for rotation of the blade and the influence of aerodynamic force and a centrifugal force applying to blade has been considered. The dynamic characteristics analysis of rotor blade is mainly involved in the vibration control. The objective is to calculate the natural frequency and operating frequency of rotor blade and by modulating those frequencies and avoiding resonance at the rotational speed. Thus the vibrations of the helicopter may reduce. In this project, the three-dimension model of helicopter rotor blade is modelled in NX-CAD and imported into ANSYS software to analyse the strength, and dynamic characteristics of rotor blade have been developed. The static force and the dynamic attributes about rotor blade have been analysed with ANSYS software for different materials (aluminium alloy and composite materials). During the analysis of dynamic characteristic, the influence of aerodynamic force and a centrifugal force applying to blade has been considered.