Vibration analysis of laminated composite turbo machinery blade

Abstract

Composites or the composite materials have profound applications in various aspects of engineering, ranging from aerospace to civil, automobile to marine engineering. The present study deals with the study of twisted plates or turbo-machinery blades made of composite materials which form the fundamental element of many structural components.Rotating structures having the shape of pre-twisted blades commonly occur in several types of practical engineering areas such as turbines, airplane propellers, helicopter rotors and aircraft rotary wings. Turbo machinery is widely used in industries as turbo engines, turbo generators, turbofans etc. These plates are subjected to in-plane load on account of fluid or aerodynamic pressures. The structures implementing turbo machinery blades are subjected to high dynamic loadings. It is therefore, quite significant for design, safety and life of the machinery to determine their dynamic character accurately as they are working at high speeds. The present study deals with the vibration analysis of the laminated composite twisted plates subjected to free vibrations. The analysis commences with the review of the previous works done in order to gather a rough idea regarding the said matter.The analysis further proceeds with the study of the effects of the various parameters such as increase in the number of layers, aspect ratio, side to thickness ratios, angle of twist etc using ANSYS.The effect of number of layers, changing angle of twist, width to thickness ratio, aspect ratio, etc on the vibration are presented.