| タイトル | The role of rotor impedance in the vibration analysis of rotorcraft |
| 著者（英） | Hohenemser, K. H.; Yin, S.-K. |
| 著者所属（英） | Textron Bell Helicopter|Washington Univ. |
| 発行日 | 1978-01-01 |
| 言語 | eng |
| 内容記述 | In an improved method which retains the advantage of separate treatment of rotor and airframe, the rotor impedance is used to correct the input to the airframe. This improved method is illustrated for a strongly idealized case of vertical excitation and then for rolling and pitching moment excitation of a four bladed hingeless rotor on an up-focussing flexible mount. Contrary to the usual approach that represents aeroelastic blade motions by a series of normal blade modes in vacuum, the aeroelastic rotor impedances are computed directly with a finite blade element method that includes aerodynamics. The rotor impedance matrix for three or more blades is determined from the root moment impedance for a single blade by a simple multiblade transformation rule. Force and moment amplitudes transferred from the rotor to the support are found to be critically dependent on the support dynamics. |
| NASA分類 | STRUCTURAL MECHANICS |
| レポートNO | 79A18653 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/428962 |
