【摘要】 对海底悬跨管道在段塞流和涡激振动(VIV)耦合作用下的动力响应进行了数值模拟。基于向量式有限元(VFIFE)法考虑内部段塞流动，结合尾流振子模型建立了海底悬跨管道涡激振动分析模型，研究了不同Taylor气泡或液塞平移速度(v_T=3～5 m/s)、不同液塞长度(L_S=15D～45D)下悬跨管道的横向振动特性。结果表明：海底悬跨管道涡激振动的锁振区间受段塞流作用的影响有向后延展的趋势；Taylor气泡平移速度的增加、液塞长度的减小会显著增加锁振区间；液塞长度的增长将会增大管道振动响应幅值。更多还原

【Abstract】 Numerical investigation was conducted for the dynamic analysis of a submarine suspended pipeline under the coupling effect between slug flow and vortex-induced vibration(VIV). Considering the internal slug flow, the VIV analysis model of the submarine suspension pipeline was established based on the vector form intrinsic finite element(VFIFE) method and the wake oscillator model. The transverse vibrations under different translation velocities of Taylor bubble or slug(v_T=3-5 m/s) and different slug lengths(L_S=15D-45D) were investigated. The analysis results show that the lock-in region of VIV of the submarine suspended pipeline tends to extend backward due to slug flow. The increase of Taylor bubble translation velocity and the decrease of slug length significantly increase the lock-in interval. Moreover, the increase of slug length aggravates the vibration amplitude.更多还原