Accession Number : ADP007809

Title :   Computation of Flutter Boundaries in the Time and Frequency Domain,

Corporate Author : DEUTSCHE AIRBUS G M B H BREMEN (GERMANY F R)

Personal Author(s) : Zimmermann, H. ; Vogel, S. ; Henke, H. ; Schulze, B.

Report Date : MAR 1992

Pagination or Media Count : 9

Abstract : Computations of flutter boundaries in the time and frequency domain are presented using an interactive 3D Transonic Small Perturbation code. Results of conventional-flutter calculations in the frequency domain are opposed to those of flutter simulations integrating the aerodynamic and structural equations of motion simultaneously in the time domain. The paper first highlights the basic properties of these two approaches and then presents results for a six and a two degrees-of-freedom model. A comparison of generalized airloads determined by harmonic and pulse excitation is presented additionally.

Descriptors :   *FLUTTER, AERODYNAMICS, BOUNDARIES, COMPARISON, COMPUTATIONS, DEGREES OF FREEDOM, EQUATIONS OF MOTION, EXCITATION, FREQUENCY DOMAIN, HARMONICS, MODELS, MOTION, PERTURBATIONS, PULSES, SIMULATION, TIME DOMAIN, GERMANY.

Subject Categories : Aerodynamics
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE