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FATIGUE LIFE EVALUATION METHOD, FATIGUE LIFE EVALUATION SYSTEM, AND FATIGUE LIFE EVALUATION PROGRAM
FATIGUE LIFE EVALUATION METHOD, FATIGUE LIFE EVALUATION SYSTEM, AND FATIGUE LIFE EVALUATION PROGRAM
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机译：疲劳寿命评估方法，疲劳寿命评估系统和疲劳寿命评估程序
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摘要
PROBLEM TO BE SOLVED: To provide a fatigue life evaluation method, a fatigue life evaluation system, and a fatigue life evaluation program with which it is possible to evaluate the fatigue life of an object to be measured simply with high accuracy when a load waveform is systematically and repeatedly applied to the object.SOLUTION: Waveform data of m cycles is created from load waveform data for test (S1); the amplitude of m cycles is extracted on the basis of a rain flow method (S2); the number of amplitudes Na of the m cycle and a remainder Na %m when the number of amplitudes Na is divided by the number of cycles m are obtained (Sa11, Sa12); a range of amplitudes having periodicity among m cycles is obtained on the basis of the remainder Na %m (Sa13, Sa14); a frequency Fmi of an i'th amplitude of the m cycles and a frequency Fci of an i'th amplitude having periodicity among the m cycles are obtained (S4, S5); the frequency FMi of the i'th amplitude of the m cycles is obtained from each of the frequencies (S6); and the fatigue life is evaluated from rules on cumulative fatigue damage on the basis of the frequency FMi of the i'th amplitude of the m cycles (S7).SELECTED DRAWING: Figure 2
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