3차원 날개의 플러터 해석 결과와 풍동시험 결과의 비교연구

Abstract

In this study, a comparison study of flutter analysis for the wings with wind tunnel test data has been conducted in the subsonic, transonic and supersonic flow regime. The frequency and time domain analysis method for aeroelastic governing equations are applied to obtain the flutter solution. The Doublet Lattice Method(DLM) in subsonic flow and the Doublet Point Method(DPM.) in supersonic flow are used to calculate unsteady aerodynamics in the frequency domain. For all speed range, the time-domain nonlinear unsteady Transonic Small Disturbance code has been incorporated into the coupled-time integration aeroelastic analysis(C-171A) to calculate flutter speeds. Three-types of wings with experimental data have been considered in this paper. MSC/NASTRAN is used for natural free vibration analyses of wing models and calculated flutter velocities and frequencies are compared with the experimental data from wind tunnel tests.