The authors gratefully acknowledge the financial support from the Natural Science Foundation of China(NSFC,51221003,U1262201);This research is also supported by other projects(Grant numbers:2013AA064803,2011ZX05009-005).
This paper is concerned with the problem of longitudinal vibration of a 3,000 m long disconnected drilling riser during installation and hangoff operation.The natural frequency,amplitude of vibration displacement and ...