| タイトル | Optimization and mechanisms of mistuning in cascades |
| 著者（英） | Hall, K. C.; Crawley, E. F. |
| 著者所属（英） | Massachusetts Inst. of Tech. |
| 発行日 | 1984-06-01 |
| 言語 | eng |
| 内容記述 | In the present inverse design procedure for the optimum mistuning of a high bypass ratio shroudless fan that is modeled as a cascade of blades (each with a single torsional degree-of-freedom), linearized supersonic aerodynamic theory is used to compute the unsteady aerodynamic forces in the 'influence coefficient' form at a typical blade section. The mistuning pattern is then numerically optimized in order to achieve a specified increase in the aeroelastic stability margin with a minimum amount of mistuning. If the blades are self-damped, an optimized mistuning pattern can be found that achieves a given stability margin for a much lower level of mistuning than required for the alternate mistuning pattern, which requires only two blade frequencies and is relatively insensitive to implementation errors. |
| NASA分類 | AIRCRAFT PROPULSION AND POWER |
| レポートNO | 84A46993
ASME PAPER 84-GT-196 |
| 権利 | Copyright |
