Effect of Pretwist on Free Vibration Characteristics Determination of Metallic Curved Blade Replaced with Composite Material

M.L. Pavan Kishore^1, and R.K. Behera¹

¹Department of Mechanical engineering, National Institute of Technology, Rourkela, India

Cite this paper:
M.L. Pavan Kishore and R.K. Behera. Effect of Pretwist on Free Vibration Characteristics Determination of Metallic Curved Blade Replaced with Composite Material. Journal of Ocean Research. 2014; 2(1):11-16. doi: 10.12691/jor-2-1-3

Abstract

This paper addresses the effects of a pretwist on the behavior of curved blade. The blade is considered to be clamped at one end on the axis of rotation. The vibration analysis of pre-twisted blade is performed by using finite element method based solver Ansys. The effects of pretwist on the natural frequencies and mode shapes of metallic curved blade replaced with composite are investigated. The methodology used to determine the Eigen frequency characteristics are determined and the results emphasizing the influence played by the ply angle, pretwist and stacking sequence on the free vibration characteristics are presented and pertinent conclusions are outlined.

Keywords:
composite finite elements hexahedral mesh nodes pre twist

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