一腱断裂下深水张力腿平台非线性动力响应及系泊特性研究

张力腿平台采用特殊的垂直系泊系统，属于半顺应半刚度式平台，平台主体-系泊系统-立管之间的耦合动力响应是张力腿平台设计的关键，直接影响平台的安全性和可靠性。文中首先采用数值模拟和模型试验相结合的手段对一座工作水深为500m的张力腿平台运动响应和系泊特性进行了对比验证，模型缩尺比为1：40，试验在上海交通大学海洋工程国家重点实验室进行，数值计算采用SESAM软件。在试验验证的基础上重点对一腱断裂的前、后平台水动力性能进行了对比分析，重点关注有义波高、特征周期以及浪向角等因素对六自由度运动响应以及张力腿张力特性的影响。

Study on the Dynamic Response and Tension Characteristics of a TLP with One Tendon Broken

As a type of semi-compliant and semi-fixed platform, the Tension Leg Platform (TLP) has a special vertical mooring system. The key of the design is the coupled dynamic response of plat-form, mooring system and risers, which directly affects the safety and reliability of the platform. This paper compares the motion response and mooring characteristics of a TLP in 500 m underwater by the methods of numerical simulation and model test. The model test was carried out in the State Key Laboratory of Ocean Engineering of Shanghai Jiao Tong University with scaling factor model test 1:40. The numerical calculation is conducted by the SESAM software from DNV. The results from the numerical simulation appear similar with that from the model test, verifying its reliability. Further-more, the hydrodynamic characteristics of a TLP with one tendon broken are investigated in detail, focusing on the influences of significant wave height, significant period and wave approach angle on the six-degree-of-freedom motion responses and tension in tendons of the TLP.