高速翼面颤振模型设计中颤振主要模态的判断和分析

doi:10.7527/S1000-6893.2014.0252

Abstract

Abstract: In wind tunnel flutter test, the matching degree between scaled model and prototype would directly affect the reliability of test results. It is difficult to achieve completely dynamic similarity for some material or technological constrains, and only lower order modes can be accurately simulated to construct a compromised model. Theoretical support would be necessary to answer the question of how to define the order of modes simulated in order to guarantee data validity of wind tunnel flutter test. An analytical study of a sweepback wing was undertaken to estimate the main mode orders needed for accurate flutter prediction by comparing generalized aerodynamic stiffness coefficient, unsteady aerodynamic force and flutter results. The results show that the aerodynamic stiffness coefficient with expression of mode shape could be taken as a quick criterion for mode selection in flutter model design and analysis, and the research could be used to effective control the order of the model and improve model design efficiency.

Key words: flutter test, mode simulation, unsteady aerodynamic force, model design, aerodynamic stiffness

CLC Number:

V215.3

Ling ZHAO Ziqiang Liu. Analysis and Judgment of Flutter Influence Mode of High speed Wing Model[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, doi: 10.7527/S1000-6893.2014.0252.

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Analysis and Judgment of Flutter Influence Mode of High speed Wing Model

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