Optimum Selection of Design Variable Increments to Improve Flutter Characteristics.

Abstract

When the flutter analysis is formulated as an eigen-problem, the expression for the derivative is applicable. Both modal and collocation flutter analysis methods are accommodated. However, in the case of modal analysis, it happens that some of the required quantities are not directly available and must be developed. The development is relatively straight- forward, and is based on the concept of completeness in an engineering sense. With the partials of the eigenvalue, the gradient of the flutter stability constraint surface in parameter space may be developed, thereby making possible automated optimized design which accomodates the flutter constraint.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1970
Accession Number
ADA367071

Entities

People

  • Lynn C. Rogers

Organizations

  • Flight Dynamics Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aerospace Craft
  • Air Force
  • Airframes
  • Airspeed
  • Coefficients
  • Design Criteria
  • Eigenvalues
  • Eigenvectors
  • Engineering
  • Equations
  • Frequency
  • Kernel Functions
  • Modal Analysis
  • Resonant Frequency
  • Spacecraft
  • Vehicles

Fields of Study

  • Physics

Readers

  • Control Systems Engineering.
  • Structural Dynamics.

Technology Areas

  • Space