本报告总结了API 2SK第三版studlink和无studless链条疲劳曲线的高负荷、量程低周修正推导，并在这方面补充了API TR 2FC-1第一版中报告的标准疲劳曲线推导。此外，还建议对API 2SK的独立钢丝绳芯（IWRC）和螺旋股（SS）钢丝绳疲劳曲线进行低周高负荷范围修正，审查聚酯绳疲劳数据，并与API 2SM、API 2SK和ISO 19901-7中目前包含的建议进行比较。提供了对API TN曲线以及链和聚酯疲劳试验数据的建议修正；其中，分段线性TN曲线（在对数空间中）的下半部分与API 2SK中的相同，而上半部分是建议的校正或更改。

This report summarizes the derivation of high-load, range-low cycle corrections to API 2SK, 3rd Edition studlink and studless chain fatigue curves, and in this respect supplements the derivation of standard fatigue curves reported in API TR 2FC-1, 1st Edition.In addition, low cycle high load range corrections to API 2SK's independent wire rope core (IWRC) and spiral strand (SS) wire rope fatigue curves are proposed, and polyester rope fatigue data is reviewed and compared to the recommendations presently contained in API 2SM, API 2SK, and ISO 19901-7.The proposed corrections to the API TN curves and chain and polyester fatigue test data are provided; where the lower part of the piecewise linear TN curves (in the log-log space) are the same as in API 2SK, while the upper part is the correction, or change, proposed.