基于水动力性能的TLP结构选型研究

Structure type selection of TLPs based on hydrodynamic performance

为了解决四种典型结构型式的张力腿平台在中国南海荔湾气田极端海况条件下的选型问题,采用新的相似原则以保证平台的设计拥有相同的相似条件。这些相似条件确保了四种平台具有相似的水动力性能和系泊性能。考虑平台和系泊系统包括顶张紧式立管(TTRs)、钢悬链式立管(SCRs)及筋腱之间的耦合效应,运用动态时域耦合分析方法计算得到平台的动力响应,并通过对比不同结构型式的平台在作业、极限及生存工况下的运动响应以得到最优水动力性能平台。文中还分别对四种张力腿平台的动态响应、筋腱受力、气隙分析和动晕环境条件进行对比分析,分析结果为实际工程提供参考。

In order to find which of four typical Tension Leg Platforms is more suitable for the Liwan field in the South China Sea,this study chooses one based on the assumption of similarity principle to ensure that the four platforms have the same similarity criteria in the design. These similarity principles are used to ensure that these four platforms have similar hydrodynamic response and mooring property. In the time domain simulation,the interaction between the platform and the mooring system is considered,in terms of TTRs,SCRs and tendons. In order to provide references for engineering application,the dynamic response,tendon tensions,air gap analysis and susceptibility to seasickness are compared.