Study on pure IL VIV of a free spanning pipeline under general boundary conditions
详细信息 查看全文
- 作者：Wan-hai Xu ; Jing-yu Xu ; Ying-xiang Wu ; Chun-ning Ji
- 关键词：Key wordsfree spanning pipeline ; vortex ; induced vibrations ; boundary conditions ; internal fluid
- 刊名：China Ocean Engineering
- 出版年：2017
- 出版时间：March 2017
- 年：2017
- 卷：31
- 期：1
- 页码：114-122
- 全文大小：
- 刊物类别：Engineering
- 刊物主题：Offshore Engineering; Oceanography; Coastal Sciences; Fluid- and Aerodynamics; Marine & Freshwater Sciences; Numerical and Computational Physics, Simulation;
- 出版者：Chinese Ocean Engineering Society
- ISSN：2191-8945
- 卷排序：31
文摘
Pipeline spans may occur due to natural seabed irregularities or local scour of bed sediment. The pure in-line (IL) vortex-induced vibrations (VIV) analysis of the free spans is an important subject for design of pipeline in uneven seabed. The main objective of this paper is to analyze the characteristics of pure IL VIV of a free spanning pipeline under general boundary conditions. An IL wake oscillator model which can describe the coupling of pipeline structure and fluctuating drag is introduced and employed. The coupled partial differential equations of structure and wake are transformed into a set of ordinary differential equations using two-mode Galerkin method. Some case studies are presented and thoroughly discussed in order to investigate the effects of internal fluid, axial force and boundary conditions on the pure IL VIV.