Enhancement of Static and Dynamic Performance of Composite Tapered Pretwisted Rotating Blade With Variable Stiffness

Author:

Farsadi Touraj1

Affiliation:

1. Department of Aerospace Engineering, Adana Alparslan Turkes Science and Technology University, Adana 01250, Turkey

Abstract

Abstract Composite pretwisted tapered rotating thin-walled beams (TWB) can be used as a load-carrying structural part of a composite helicopter, wind turbine, fan, and turbomachinery blades. In the present study, the variable stiffness concept with curvilinear fiber path is used to achieve improved structural statics and dynamics performance of uniform and asymmetric composite thin-walled rotating beams. A parametric study is performed to investigate the effect of different fiber paths on the structural performance metrics including frequency spacing, coupling factor, and critical buckling load. For this purpose, The Euler–Lagrange governing equations of the dynamic system are derived via Hamilton's principle. To solve the governing set of equations, the extended Galerkin’s method (EGM) is employed. To validate the TWB model with curvilinear fibers, commercial finite element analysis tools abaqus is used. The author believes that the results presented here are likely to provide valuable information to the engineers involved in the design of advanced turbomachinery rotating blades using a variable stiffness concept with curvilinear fiber placement.

Publisher

ASME International

Subject

General Engineering

Reference32 articles.

1. Review of Composite Rotor Blade Modeling;Hodges;AIAA J.,1990

2. Toward Understanding the Tailoring Mechanisms for Thin-Walled Composite Tubular Beams;Rehfield,1989

3. Dynamics, Vibration and Control of Rotating Composite Beams and Blades: A Critical Review;Rafiee;Thin-Walled Struct.,2017

4. Aeroelastic Stability Analysis of a Composite Rotor Blade;Hong;J. Am. Helicopter Soc.,1985

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