深水钢悬链线立管触地区疲劳实验系统设计

摘要

Touchdown zone (TDZ) is one of the locations vulnerable to fatigue damage. The fatigue life prediction is difficult, which would greatly depend on model experiments. As a result, based on the related theoretical research, a SCR fatigue life test system for the TDZ is designed to simulate the actual working condition of riser. This system has considered the variation and combination of tension, bending, internal and external pressure, pipe-soil interaction and other factors. The test system can be used for carrying out deepwater riser fatigue experiments, studying the fatigue failure mechanism of SCR in the TDZ, and predicting its fatigue life accurately.%深水钢悬链线立管(steel catenary riser,SCR)触地区易发生疲劳破坏,且疲劳寿命预测问题是目前理论计算与数值分析的难点,通过实验能更好地促进理论和数值研究.因此在相关理论研究基础上,设计一套SCR触地区疲劳实验系统,模拟实际工作状况,考虑张力、弯曲、内外压与管土相互作用等因素的变化组合.该实验系统为以后开展深水立管疲劳实验、研究SCR触地区疲劳破坏机理以及准确预测SCR触地区的疲劳寿命奠定基础.