METHOD FOR DETERMINATION OF FATIGUE LIFETIME CONSUMPTION OF AN ENGINE COMPONENT

摘要

Disclosed is a method for the determination of fatigue lifetime consumption of an engine component, the method comprising defining a reference thermal load cycle, the reference thermal load cycle being characterized by a reference load cycle amplitude and a reference load cycle time, and determining a reference load cycle lifetime consumption. The method further comprises measuring a temperature of the engine component, determining a thermal load cycle based upon said temperature measurement, determining a load cycle amplitude, defined as the difference between the maximum measured temperature during the thermal load cycle and the minimum measured temperature during the thermal load cycle, determining a load cycle time, relating the load cycle time to the reference load cycle time, thereby determining a load cycle time factor, relating the load cycle amplitude to the reference load cycle amplitude, thereby determining a load cycle amplitude factor, combining the load cycle time factor and the load cycle amplitude factor into a combined load cycle factor, and determining a load cycle lifetime consumption dependent upon the combined load cycle factor.