一、前言转轴临界转速实质上就是轴系发生共振时的转速。在临界转速时,转子的振幅将急剧增加。为此,在设计转轴时,应避免使工作转速接近或等于临界转速。由于影响临界转速因素很多,特别是挠性轴承影响因素更加复杂,计算误差有时可高达30％以上。为此可同时通过实验来测定。由于在达到临界转速时,转轴的振幅会急剧增大,不少人就以此来制定临界转速。但是这种 First, the foreword The critical shaft speed is essentially the axis of resonance when the speed. At the critical speed, the rotor amplitude will increase sharply. To this end, the design of the shaft, should avoid working speed close to or equal to the critical speed. Due to many factors affecting the critical speed, especially the more flexible bearing factors, the calculation error can sometimes be as high as 30%. To this end can be determined by experiment. As the critical speed is reached, the amplitude of the shaft will increase sharply, so many people will use it to set the critical speed. But this