本文分析了汽轮机叶片振动能量耗散的机理,介绍了叶片振动的机械阻尼和气动阻尼的概念。采用无线电遥测方法和B/K2010频谱分析仪作出了叶片共振幅频曲线,求出了各振型频率的对数衰减率。并给出了一级长叶片在真空试验条件下不同结构形式的机械对数衰减率试验结果的实例。 This paper analyzes the mechanism of steam turbine blade energy dissipation and introduces the concept of mechanical damping and aerodynamic damping of blade vibration. The radio frequency telemetry method and B / K2010 spectrum analyzer were used to make the amplitude-frequency curve of blade resonance, and the logarithmic decrement of each mode frequency was obtained. The experimental results of the mechanical logarithm decrement rate of different structure forms of a long blade under vacuum test are given.