自升式钻井平台结构动力响应研究与等效建模要点讨论

随着油气开采作业水深的不断增加,自升式平台的动力敏感性愈发明显,对其进行结构动力响应研究十分有必要,而结构动力响应研究的重点在于平台固有周期的计算。以某400英尺自升式钻井平台为研究对象,分析并探讨了平台结构动力响应的计算方法,重点对平台等效建模中的关键要点进行了讨论与总结,并提出新的观点。以此为依据,基于SESAM GeniE软件进行建模,计算了平台的一阶固有周期,与基本设计数据进行对比,验证了建模中关键点处理的正确性,可为自升式平台的结构动力响应研究提供参考。

Research on structure dynamic response of a jack-up drilling unit and discussion on the key factors in equivalent modeling

With the increase of the water depth for oil and gas exploitation, the dynamic susceptibility of the jack-up unit becomes more obvious. It is necessary to have a research on the structure dynamic response. However, the natural period calculation of the unit is the main and important point in this research. Take a 400 ft jack-up drilling unit as an example, the method of the dynamic response calculation was analyzed and studied. The key factors in the equivalent modeling were discussed and concluded in detail. New viewpoints were introduced. The first order natural period was obtained based on those factors and viewpoints by using SESAM GeniE software. The results were compared with those from the basic design. Thus, the validity was checked and verified. It can provide reference for structure dynamic response analysis of jack-up units.