An active truncation method for simulating deep-water riser installation

作者:Ye, Mao; Duan, Menglan*; Li, Mingjie; Chen, Jinghao; Tian, Kai; Han, Feng; Hu, Zhihui
来源:Ships and Offshore Structures, 2014, 9(6): 619-632.
DOI:10.1080/17445302.2013.879507

摘要

An active truncation hybrid model test is regarded as the most effective way for deep-water flexible structure test by The International Towing Tank Conference (ITTC). Owing to environmental loads and the movement of vessel, the dynamic boundary conditions at the truncated position related to the active truncation method are hard to be controlled. It has little relevant research which is reported on this testing technology. In this paper, an active truncation method is performed to simulate the process of deep-water steel catenary riser installation. The mechanical model of steel catenary riser (SCR) installation process is developed and corresponding equations for the developed model are derived. At the truncated position, device control principles are fitted from the solutions of the derived equations. 6-DOF (degrees of freedom) platform is used to simulate the motions of vessel. And the software and hardware of control system for this active truncation method are developed. The concept is first proposed, of which, that deep-water steel catenary riser installation test is conducted onshore. The test results show that this active truncation method is capable to simulate the process of steel catenary riser installation well. The test method has also provided the foundation for future works of other deep-water projects.