Reliability based Design Optimisation of Floating Offshore Wind Turbine Support Structures

绝大多数海上风电资源位于深水区。由于传统的海上风力技术仅限于浅水，因此需要开发浮动风力涡轮机（FWTs）来利用这种巨大的能量。浮式海上风能技术尚处于早期发展阶段。与底部固定的海上风力涡轮机相比，fwt进一步发展的最大障碍之一是其更高的成本。降低FWT技术成本的一种方法是提高FWT支撑结构的可靠性（即降低失效概率），因为FWT支撑结构暴露在恶劣的海洋环境中，在风、浪和电流载荷下具有很大的不确定性。该博士项目将通过开发一种高效、稳健的基于可靠性的设计和优化框架，研究FWT支撑结构可靠性的提高和成本的降低，该框架能够高效、稳健地实现优化设计，以满足目标可靠性。

The vast majority of offshore wind resources are located in deep water regions. As the conventional offshore wind technology is restricted to shallow waters, there is a need for developing floating wind turbines (FWTs) that enables using this vast amount of energy.Floating offshore wind energy technology is in early-stage development. One of the largest barriers to further development of FWTs is their greater cost relative to bottom-fixed offshore wind turbines. One way to lower the cost of FWT technologies is through the increased reliability (i.e. reduced probability of failure) of FWT support structures, which are exposed to the harsh marine environment with great uncertainties in wind, wave and current loads.This PhD project will look into the improvement of reliability and the reduction of cost of FWT support structures, through the development of an efficient and robust reliability-based design and optimisation framework that is capable of efficiently and robustly achieving optimal design to meet target reliability.