The Effects of Elasticity in the Foundation on the Flutter of a Metallic High Aspect Ratio Wing

<p>The goal of this thesis is to study the flutter characteristics of a metallic high-aspect ratio wing, with linearly varying chord across the semis-span, and a simulated elastic foundation. The general planform of the wing is similar to the one found in a High- Altitude Long-Endurance Uninhabited Aerial Surveillance Vehicle (HALE USAV).</p> <p>The problem is studied using a simplified aerodynamic loading based on thin-airfoil theory, which is then combined with a Lagrangian formulation to solve the system as stationary. The wing has no control surfaces or external stores, and is modeled as a uniform beam with known mechanical properties, being attached to a combination of torsion springs at the root to reproduce the elastic foundation.</p> <p>The analysis of the problem includes the development of a Matlab code, which permits different root conditions to be defined, and computes the flutter speed and frequency, outputting information in the form of plots and data lists, making the analysis easy to follow.</p>

Name thesis:degree_name

Master of Science in Aerospace Engineering

Level thesis:degree_level

Thesis - Open Access

Discipline thesis:degree_discipline

Aerospace Engineering

Year

2009

Author dc:creator

• Kriskovich, Horacio Esteban Sepic

Contributors dc:contributor

• Habib Eslami
• Jean-Michell Dhainaut
• James Ladesic

• elasticity
• flutter
• high aspect ratio
• wings
• Aerodynamics and Fluid Mechanics
• Aerospace Engineering

Repository record dc:identifier

https://commons.erau.edu/db-theses/107

OAI identifier oai:identifier

oai:commons.erau.edu:db-theses-1151