Collocation Flutter Analysis Study. Volume 2. Fluenc - Computer Program to Calculate Structural Influence Coefficients

Abstract

A displacement solution for the calculation of structural influence coefficients (SIC's) is presented. The formulation utilizes the lumped parameter approach that is consistent with collocation flutter solutions. The structure is synthesized as concentrated mass elements connected by massless elastic plates and/or beams. There are two methods of generating the mass matrix; they are: (1) lumped concentrated mass points, (2) consistent mass matrices. Along with the calculation of the SIC's, the natural vibration modes and frequencies are calculated. There are two options for punching out the flexibility matrix for use in subsequent COFA computer programs. Option 1 punches out the full flexibility matrix; Option 2 punches out the reduced flexibility matrix eliminating the rows and columns pertaining to structural attach points.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1969
Accession Number
AD0859286

Entities

People

  • Donald R. Ulbrich

Organizations

  • Hughes Aircraft Company

Tags

Communities of Interest

  • Air Platforms
  • C4I
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Coefficients
  • Computer Programs
  • Computers
  • Displacement
  • Eigenvalues
  • Elastic Properties
  • Equations
  • Frequency
  • Lepidoptera
  • Mass Number
  • Mechanics
  • Modulus Of Elasticity
  • Plastic Explosives
  • Resilience
  • Resonant Frequency
  • Stiffness
  • Vibration

Fields of Study

  • Physics

Readers

  • Computer Science/Computer Engineering/Data Science/Digital Signal Processing.
  • Control Systems Engineering.
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)