| タイトル | Analytical and experimental investigation of mistuning in propfan flutter |
| 本文（外部サイト） | http://hdl.handle.net/2060/19870008683 |
| 著者（英） | Williams, Marc; Kaza, Krishna Rao V.; Mehmed, Oral; Moss, Larry A. |
| 著者所属（英） | NASA Lewis Research Center |
| 発行日 | 1987-01-01 |
| 言語 | eng |
| 内容記述 | An analytical and experimental investigation of the effects of mistuning on propfan subsonic flutter was performed. The analytical model is based on the normal modes of a rotating composite blade and a three-dimensinal subsonic unsteady lifting surface aerodynamic theory. Theoretical and experimental results are compared for selected cases at different blade pitch angles, rotational speeds, and free-stream Mach numbers. The comparison shows a reasonably good agreement between theory and experiment. Both theory and experiment showed that combined mode shape, frequency, and aerodynamic mistuning can have a beneficial or adverse effect on blade damping depending on Mach number. Additional parametric results showed that alternative blade frequency mistuning does not have enough potential for it to be used as a passive flutter control in propfans similar to the one studied. It can be inferred from the results that a laminated composite propfan blade can be tailored to optimize its flutter speed by selecting the proper ply angles. |
| NASA分類 | STRUCTURAL MECHANICS |
| レポートNO | 87N18116
NAS 1.15:88959
E-3412
NASA-TM-88959
AIAA PAPER 87-0739 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/151751 |
