摘要：This paper presents issues of fatigue life calculations in operational load conditions.The assumed runs were so processed as to get a set of sinusoidal cycles by using the following methods: full cycles counting method and rainflow counting method.On the basis of such sets of cycles of the varying parameters Sm i and Sa i were prepared block load spectra of equivalent amplitudes Saz,obtained with the use of an original method of these authors,in which two-parameter fatigue characteristics were applied.The work resulted in comparison of fatigue life results for load spectra determined by using the assumed cycles counting methods and the assumed two-parameter fatigue characteristics: the model IM,model II,model III and model IV,respectively.
关键词：operational load;equivalent load amplitude;two-parameter fatigue characteristics;fatigue life
