转子叶片在非均匀来流条件下的流体激振特性

The Fluid Exited Vibration Properties of Rotor Blades under Nonuiform Intake Flow Conditions

该文通过研究得出非均匀来流对转子叶片流体激振的三个重要特征 :非均匀来流相对于转子叶片的非定常流中主频分量是产生叶片动应力的决定因素 ;非均匀来流的非均匀度 (相当于非定常流的波幅 )大小和叶片流体激振的动应力大小成正比 ;转子叶片流体的定常压力水平与叶片动应力的水平密切相关。图 4表

Research shows that fluid excitation of rotor blades caused nonuiform intake flow exhibits 3 important characteristics the primary non steady flow frequency fraction of the non uniform intake flow, relative to the rotor blades, plays a decisive role in generating the blades' dynamic stress; the magnitude of the intake flaw's non homogeneity(relative to the wave amplitude of the non steady flow) is in direct proportion to that of the fluid excited dynamic stress of the blades; fluids' steady pressure is intimately connected with the level of the blade's dynamic stress. Figs 4 and tables 2