Numerical simulation of VIV for an elastic cylinder mounted on the spring supports with low mass-ratio  

弹性支撑低质量比圆柱涡激振动数值模拟(英文)

作　　者：徐俊凌[1] 朱仁庆 

机构地区：[1]江苏科技大学船舶与海洋工程学院,江苏镇江212003

出　　处：《Journal of Marine Science and Application》2009年第3期237-245,共9页船舶与海洋工程学报（英文版）

摘　　要：With the development of the offshore deep water oil industry many researchers are focusing on the vortex-induced vibrations （VIV） of deep risers. In the present work, Reynolds-averaged Navier-Stokes （RANS） equations were combined with the SST κ-ω turbulent model to simulate the stream-wise and transverse motion of an elastically mounted cylinder with a low mass-ratio, a natural frequency ratio of fx/fy = 1 and an Re number between 5 300 and 32 000, The four-order Runge-Kutta method was applied to solve the oscillating equation of the cylinder. The relationship between reduced velocity and parameters of the cylinder, including the lift coefficient, the drag coefficient, displacement and the vortex structure were then compared with recent experimental results and discussed in detail. The present numerical simulation reproduced effects have been observed in experiments, such as the lock-in phenomenon, the hysteretic phenomenon and beating behavior.

关 键 词：VIV low mass ratio stream-wise and transverse motion TWO-DEGREE-OF-FREEDOM vortex shedding model CFD 

分 类 号：O327[理学—一般力学与力学基础]