Abstract
Abstract To examine the internal flow effect (IFE) on the vortex-induced vibration (VIV) of a flexible marine riser in the subcritical internal flow region, the cross-flow (CF) VIV of the riser with single-phase internal flows is investigated employing a semi-empirical hydrodynamic force model. The governing equation can be established based on Hamilton Principle and solved by finite element method. A MATLAB code has been developed and it has been validated for IFE and VIV respectively. The numerical simulations of a flexible riser are carried out with different internal flow velocities and internal flow densities. The IFE on CF VIV is investigated by analyzing the dominant mode, dominant frequency and displacement response of the riser. It has demonstrated that with the increase of internal flow velocity and density, (1) the dominant mode of VIV can transfer to a higher order, accompanied by a jump increase of the dominant frequency; (2) the increase or decrease of the root mean square displacement of VIV depends on whether the dominant frequency approaches or departs from the vortex shedding frequency; (3) the travelling wave characteristics of VIV can be enhanced.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
