Abstract: This paper presents a vibration reliability design method of rotating turbine components. It is based on probabilistic mechanical design methods, considering natural frequencies and excitation force frequencies of these components to be random variables according to actual conditions. The reliability that natural frequencies are distanced from resonance should be calculated in the designing phase. The vibration reliability design method for discs and blades and rotors of steam turbines are given together with the vibration reliability design example of some components.

Key words: Blade, Reliability, Rotor, Stem turbine, Vibration