| 摘要 |
PURPOSE:To contrive to prevent the damage of low pressure turbine blade from occurring by a method wherein the fatigue damage is monitored through the calculation of the fatigue damage value, which is obtained by comparing the allowable number of repetitions of vibration stress determined from the natural frequency and vibration stress of low pressure turbine blades with the actual number of repetitions of vibration stress. CONSTITUTION:Fatigue damage value is calculated by comparing the allowable number of repetitions of vibration stress, which is determined from the natural frequency and vibration stress of low pressure turbine blades 5 arranged to the outer peripheral part of the disc 3 of a turbine rotor 1, with the actual number of repetitions of vibration stress. Thus, the damage due to the resonant stress can be prevented from occurring by monitoring the fatigue damage of the low pressure turbine blades. |
