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前言本文介绍了汽轮机叶片动频率系数试验研究的结果。众所周知,汽轮机切向第一音调振动频率f≤350Hz的叶片,运行时一旦与低频扰动力(Kn)合拍,将产生危险的共振,导致叶片损坏。为了防止此类叶片事故,通常采用调频措施,这就要求知道叶片动频率的数值。一般情况下,叶片的动频率是由静频率换算而得来的,其换算系数称为动频系数。动频系数的计算公式有多种,有时对同一种叶片,由于采用
Preface This paper introduces the results of the experimental study on the dynamic frequency coefficient of steam turbine blades. As we all know, the turbine tangential to the first pitch vibration frequency f ≤ 350Hz blades, run time and low-frequency disturbance force (Kn) coincide, will produce dangerous resonance, leading to blade damage. In order to prevent such a blade accident, the usual frequency control measures, which require the blade to know the value of the frequency of movement. Under normal circumstances, the dynamic frequency of the blade is derived from the static frequency conversion, the conversion factor called dynamic frequency coefficient. Dynamic frequency coefficient of a variety of formulas, sometimes the same kind of blade, due to adoption