Patent Document ID: 20110077873
Application ID: 12761354
Patent Flag: 0

Claim One:
1. An apparatus for calculating a fatigue usage factor to analyze the effect of a transient state created during operation of a mechanical device on a fatigue index in the material of the mechanical device, comprising: a transient state input unit to input information related to a transient state created during operation of the mechanical device; a characteristic fatigue usage factor calculating unit to calculate a characteristic fatigue usage factor based on an operation-transient state; a characteristic fatigue usage factor curve generation unit to generate a characteristic fatigue usage factor curve using the characteristic fatigue usage factor calculated by the characteristic fatigue usage factor calculating unit; a fatigue usage factor calculating unit to calculate a fatigue usage factor based on the operation-transient state; a cumulative fatigue usage factor calculating unit to calculate a cumulative fatigue usage factor based on the operation-transient state using the fatigue usage factor calculated by the fatigue usage factor calculating unit; and a cumulative fatigue usage factor output unit to output the cumulative fatigue usage factor calculated by the cumulative fatigue usage factor calculating unit.