Transcription of Fatigue Equivalent Load Cycle Method - ECN
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Fatigue Equivalent Load Cycle Method - ECN
ECN-C 95-074. Fatigue Equivalent load Cycle Method A General Method to Compare the Fatigue Loading of Different load Spectrums Hendriks Bulder October 1995. Fatigue Equivalent load Cycle Method Abstract A Method is presented with which the Fatigue loading of two or more load spectrums may be compared on a quantitative basis taking into account both the range and the mean of the load cycles. Keywords Fatigue , wind, turbine , wind energy ii ECN-C 95-074. CONTENTS. 1 Introduction 1. 2 Fatigue Equivalent load range 3. 3 Fatigue Equivalent load Cycle 5. 4 Example 7. Measured time series .. 7. Simulated time series.
2 FATIGUE EQUIVALENT LOAD RANGE The allowable number of cycles N for a straight S-N line on log-log scale is given by: N = k ·S−m r (1) (2) In which S r is the range of a load cycle and -1/m is the slope of the S-N line on log-log scale. The damage caused by a load spectrum of n cycles with ranges S
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