Numerical and experimental investigations of hydroelastic effects of very large moored and mechanically coupled multibody offshore floating structures

该项目的主要目标是进一步发展和使用先进的实验和数值方法来研究波浪和电流诱导载荷对浅水系泊的超大型浮式结构（VLFSs）的水弹性效应及其相关的整体结构响应。由于vlfs暴露在波浪，风和电流等各种关键环境条件下，它们可能受到波浪诱导的冲击（鞭打）和共振（弹簧）激励。软系泊锚固时，通常会发生大幅度的慢变运动，造成系泊构件的低频疲劳损伤。为了准确地解决vlfs的水弹性问题，需要考虑强非线性流动现象、浮式结构本身、其系泊系统和力学耦合系统之间的相互作用。在这个项目中，这些影响将进行广泛的实验和数值研究。即将开发的方法将基于navier - stokes的流动模拟代码与结构求解器相结合，其中包括系泊线和机械耦合系统的动力学。此外，该项目的结果可能有助于在极端条件下开发vlfs，这些条件需要考虑以确保其可操作性和安全性。

The main objective of this project is to further develop and use advanced experimental as well as numerical methods to investigate hydroelastic effects of wave- and current-induced loads on and the associated global structural responses of very large floating structures (VLFSs) moored in shallow waters. As VLFSs are exposed to various critical environmental conditions from waves, wind, and current, they may be subject to wave-induced impact (whipping) and resonant (springing) excitations. Anchored with soft moorings, large amplitude slowly varying motions generally occur, causing low-frequency fatigue damage of mooring components. To accurately tackle the problem of hydroelasticity for VLFSs, interactions between strongly nonlinear flow phenomena, the floating structure itself, its mooring system, and the mechanical coupling systems will be considered.In this project, these effects shall be extensively investigated, experimentally as well as numerically. The approach to be developed couples a Navier-Stokes-based flow simulation code with a structural solver that includes the dynamics of mooring lines and mechanical coupling systems. Further on, results of this project may contribute towards the development of VLFSs under extreme conditions that need to be considered to ensure their operability and safety.