0
research-article

Numerical Investigation on Vessel Motion-induced VIV for A Free Hanging Riser under Small Keulegan–Carpenter Numbers

[+] Author and Article Information
Jungao Wang

Department of Mechanical and Structural Engineering and Materials Science, University of Stavanger, NO-4036, Stavanger, Norway
jungao.wang@uis.no

Rohan Joseph

Department of Mechanical and Structural Engineering and Materials Science, University of Stavanger, NO-4036, Stavanger, Norway
rohansj@live.com

Muk Chen Ong

Department of Mechanical and Structural Engineering and Materials Science, University of Stavanger, NO-4036, Stavanger, Norway
muk.c.ong@uis.no

Jasna B. Jakobsen

Department of Mechanical and Structural Engineering and Materials Science, University of Stavanger, NO-4036, Stavanger, Norway
jasna.b.jakobsen@uis.no

1Corresponding author.

ASME doi:10.1115/1.4041732 History: Received November 06, 2017; Revised October 08, 2018

Abstract

A free-hanging riser is a typical riser configuration seen in the disconnected drilling riser, the water-intake riser and the deep-sea mining riser. In offshore productions, these marine risers will move back and forth in water and further generate an equivalent oscillatory current around themselves, due to the vessel motions. Both in full-scale marine operations and model tests, it has been reported that such oscillatory current leads to riser vortex-induced vibration (VIV) and therefore causes structural fatigue damage. Recently, there have been some attempts to numerically predict vessel motion-induced VIV on the compliant production risers, with emphasize on relatively large Keulegan-Carpenter (KC) numbers. In the real marine operations, the risers experience small KC number scenarios during most of their service life. Therefore, the investigation of vessel motion-induced VIV under small KC number is of great significance, especially considering its contribution to the fatigue damage. In this paper, numerical investigation of VIV of a free-hanging riser attached to a floating vessel is carried out. A new response frequency model for vessel motion-induced VIV under small KC numbers is proposed and implemented in VIVANA. Validation of the proposed numerical methodology is performed against the published experimental results, where a good agreement is achieved.

Copyright (c) 2018 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In