Rapid Subsonic Flutter Analysis for Low Aspect Ratio Composite Wings

Document Type : Research Paper

Authors

1 Department of Mechanical Engineering, Malek-Ashtar University of Technology, Shahinshahr, Iran

2 Department of Mechanical Engineering, Malek-Ashtar University of Technology

3 Department of Mechanical Engineering, Khomeinishahr Branch, Islamic Azad University, Khomeinishahr, Iran

Abstract

This study aims to achieve effective analysis and fast modeling in free vibration and flutter analyses of low aspect ratio composite wings in subsonic flow for the preliminary design stage instead of using the computationally expensive finite element method. It uses an equivalent plate method for structural modeling. Also, it uses the doublet point and the U-g methods for calculation of unsteady aerodynamic loads and carrying out flutter analysis, respectively. We investigate the effects of different parameters on the flutter behavior. The present results confirm that the structural tailoring can make a harmonious balance to the wing sweep angle effect upon the flutter behavior of composite wings, and a considerable improvement upon flutter performance is achieved by using composite materials.

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References

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