Study of Chaotic Behavior in the Nonlinear Dynamic Response of an Airfoil with a Trailing Edge Flap

Abstract

Even though flutter is a linear phenomenon, no connections between LCO, a nonlinear version of flutter, and chaos have been made. To make this connection, an internal structure for an airfoil was optimized to maximize stiffness, any changes in the aerodynamics of the optimized structure were calculated, and finally, a Finite Element model was developed to excite the aeroelastic structure. The results show that the simulation must run for an extended period of time, that the Lyapunov exponent parameters used were acceptable for the linear system, and that the chaos of the nonlinear system could not be commented on until further analysis is performed.

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Document Details

Document Type
Technical Report
Publication Date
Mar 23, 2017
Accession Number
AD1055352

Entities

People

  • Joshua J Lee

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Aeroelasticity
  • Aeronautics
  • Air Force
  • Aircrafts
  • Boundary Layer
  • Computational Fluid Dynamics
  • Computational Science
  • Differential Equations
  • Dynamic Response
  • Engineering
  • Equations
  • Equations Of Motion
  • Finite Element Analysis
  • Fluid Dynamics
  • Fluid Flow
  • Fluid Mechanics
  • Linear Systems
  • Mechanical Properties
  • Mechanics
  • Nonlinear Systems
  • Resonant Frequency
  • Simulations
  • Topology Optimization
  • Trailing Edges
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Control Systems Engineering.
  • Fluid Mechanics and Fluid Dynamics.