【摘要】 在ANSYS Workbench中，联合Transient Structural和CFX模块对航空发动机扇级叶片进行双向流固耦合振动行为研究。分析叶片转速和凸肩结构对叶片模态频率、模态振型以及气弹稳定性的影响。结果表明，转速增加对叶片的预应力模态频率提高显著，但对模态振型的改变微乎其微。施加凸肩结构不仅能提高模态频率，而且对模态振型改变较大，明显地减小了振动位移。在叶片上，合理的凸肩安装位置不仅能提高叶片气弹稳定性和运行的平稳性，而且能降低高周疲劳破坏的几率。更多还原

【Abstract】 In ANSYS Workbench, Transient Structural and CFX modules were used to study the two-way fluid-structure coupling vibration behavior of a fan-stage blade of the aeroengine. The influence of the blade rotation speed and shoulder on the modal frequency, the mode shape and the aeroelastic stability of the blade is analyzed. The results show that the prestressed mode frequency of the blade increases significantly with the increase of rotational speed, but the mode shape of the blade changes little. However, the application of shouldered structure in the blade can not only increase the mode frequency of the blade, but also change the mode shape of the blade greatly, and obviously reduce the vibration displacement of the blade. The aeroelastic stability and running smoothness of the blade can be improved, and also the probability of high-cycle fatigue failure of the blade can be reduced due to a reasonable position of the shoulder in the blade.更多还原