@techreport{oai:jaxa.repo.nii.ac.jp:00045216,
 author = {薄, 一平 and SUSUKI, Ippei},
 month = {Dec},
 note = {Prior to the launching of a satellite, several certification testes are carried out for satellite and rocket on- board components. The ground test requirements are strictly specified to verify their reliability and ability to accomplish mission objectives. But it is not easy to define ground test parameters such as load patterns, levels and duration times in the earlier stages of whole system development. Test parameters after being fully integrated in to the spacecraft would different in general from those expected in the preliminary design stage. This work is concerned with the effect of various load patterns on the fatigue strength of mission equipment. A method of evaluating fatigue damage by using a fatique damage accumulation (FDA) ratio is first proposed, then the FDA ratios are computed for different types of load patterns. Random load time history, which has a given power spectrum density function, was generated by digital computer simulation. Two-dimensional cycle counting by an advanced type of the range-pair-mean method was adapted. Miner’s rule was applied to calculate cumulative fatigue damage. This work concentrates on the FDA characteristics of various random load patterns which have the same power level. Simulation results showed that load patterns with predominant frequency have about the same fatique damage accumulation (FDA) ratio as patterns without predominant frequency if both of them have the same frequency band width. The relationship between irregularity factors and FDA ratins is also discussed in this paper., 資料番号: NALTR0957000, レポート番号: NAL TR-957},
 title = {A digital simulation method of cumulative fatique damage evaluation for spacecraft components},
 year = {1987}
}