Development of Models for the Three-Dimensional Analysis of Jack-Up Structures

移动式自升式钻井平台在水深120米以下的海域完成了世界上大部分的海上钻井作业，但其事故率高于固定装置。为了提高自升式钻井平台的安全性，本研究将开发一个三维自升式钻井平台行为综合评估框架。为了实现这一目标，将开发一种先进的塑性模型，描述自升式平台圆形浅基础在粘土和沙子中的循环行为，并将其与海洋随机波浪载荷结合在动力结构分析程序中。建模技术的预期优势将根据现有的二维工业准则和监测的现场数据进行评估。

Mobile jack-up structures perform most of the world's offshore drilling in water depths up to 120m, but have a higher accident rate then fixed installations. To improve their safety, this research will develop the framework for the integrated assessment of jack-up behaviour in three dimensions. To achieve this, an advanced plasticity model that describes cyclic behaviour of the circular shallow foundations of jack-ups in both clay and sand will be developed and incorporated with random wave loading of seas in a dynamic structural analysis program. The anticipated advantages of the modelling techniques will be assessed against existing two dimensional industry guidelines and monitored field data.