Excitation Order Research in Bladed-Disk Coupling Resonance Condition

In order to define the factors of excitation order in bladed-disk coupling resonance condition which affects the working life of the bladed-disk, a more accurate formula of excitation order is proposed. The graph of excitation order applied to a bladed-disk structure is given firstly considering rotor-stator interaction. Then the formula of excitation order is developed according to the similarity of graph between aliasing and excitation order. Finally the formula verification of excitation order is given both numerically and experimentally using a typical bladed-disk model. The study shows that the excitation order applied to bladed-disk structure only has to do with the number of rotor blade and stator vane ,which avoids the uncertainty of previous conclusion.