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本文从喷嘴激振力作功的原理出发,阐述了斜置喷嘴结构可以显著地降低叶片第一音调各类振型的动应力,并以国产某中压事故级组为例作了计算,可使切向弯曲B_0型等危险振型降低动应力达50%以上。
In this paper, starting from the principle of nozzle excitation force work, the oblique nozzle structure is described to significantly reduce the dynamic stress of the first pitch and all vibration modes of a blade. Tangential bending type B_0 and other dangerous vibration modes reduce dynamic stress by more than 50%.