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| セオドーセン翼撓み解析× | ブレード要素運動量理論× | |
|---|---|---|
| 分野 | 航空宇宙工学 | 航空宇宙工学 |
| 系統 | Process / pipeline | Process / pipeline |
| 提唱年≠ | 1935 | 1889 |
| 提唱者≠ | Theodore Theodorsen | William Froude, Heinrich Glauert |
| 種類≠ | Stability analysis | Analysis method |
| 原典≠ | Theodorsen, T. (1935). General theory of aerodynamic instability and the mechanism of flutter. NACA Report No. 496. link ↗ | Froude, W. (1889). On the elementary relation between pitch, slip, and propulsive efficiency. Transactions of the Institution of Naval Architects, 30, 94–103. link ↗ |
| 別名 | flutter analysis, aeroelastic stability, Theodorsen's function | BEM theory, rotor performance prediction, actuator disk method |
| 関連 | 3 | 3 |
| 概要≠ | Theodorsen flutter analysis is a classical aeroelastic method for predicting the onset of flutter, a self-excited oscillation where aerodynamic forces interact with elastic structural motion to cause rapid growth of oscillations. Developed by Theodore Theodorsen in 1935, the method uses frequency-domain analysis with Theodorsen's function to compute aerodynamic forces on oscillating wings. Flutter speed prediction is essential for aircraft certification and structural design. | Blade element momentum theory (BEM) is a fundamental method for analyzing rotor performance by combining blade element aerodynamics with momentum conservation. Developed initially by Froude and refined by Glauert and Leishman, BEM decomposes a rotor into radial blade elements, computes local aerodynamic forces, and sums contributions to predict total thrust, torque, power, and efficiency. BEM is standard for helicopter, wind turbine, and propeller design. |
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