VIV Prediction of a Long Tension-Dominated Riser using a Wake Oscillator Model

摘要：

　　The vortex-induced vibration (VIV)of flexible long structures with combined in-line and cross-flow motion has been studied using a wake oscillator in this paper.The mean top tension was evaluated analytically and verified with experimental results, good agreement was observed to present its validity.Then the nonlinear coupled dynamics of the in-line and cross-flow VIV of a long tension-dominated riser were analyzed with the consideration of variation of mean top tension.The in-line and cross-flow resonant frequencies,lift and drag coefficients, dominant mode numbers, amplitudes and instantaneous deflections are reported and compared with experimental results, excellent agreements are observed.The comparison of mode numbers between the calculation with and without consideration of variation of mean top tension showed that the proposed analytical solution of mean top tension can produce a better prediction of multi-mode VIV.

关键词： Wake oscillator model Riser VIV prediction Top tension Multi-mode

作者: Jijun Gu Yu Zhang Yi Wang Menglan Duan Carlos Levi

作者单位: Laboratório de Tecnologia Oce(a)nica-LabOceano,Universidade Federal do Rio de Janeiro(UFRJ),Rio de J Offshore Oil/Gas Research Center,China University of Petroleum,Beijing,China

会议类型: 国际会议

会议名称: SUT International Conterence on Subsea Technology and Deepwater Engineering(SUT 水下技术和深水工程国际会议)

会议地点: 深圳

会议语种:英文

页码: 352-363

在线出版日期: 2012-09-25（万方平台首次上网日期，不代表论文的发表时间）