Simulation of Two Degrees of Freedom VortexInduced Vibration by
 Using Improved Shear Stress Transport Model

Abstract

Abstract: According to the existing literature, the calculated results of numerical simulations of two degrees of freedom (DoFs) vortexinduced vibration with low mass ratio of column are not ideal. Especially, the maximum vibration amplitude is significantly smaller than the experimental value. In this paper, based on open source software OpenFOAM, the standard shear stress transport (SST) turbulence model and numerical simulation method are improved. Then, the vortex induced vibration of a cylinder with a mass ratio of 2.6 and a doubleDoF from 2 to 14 is simulated by the sweep frequency method, and the results of numerical simulation are analyzed and compared. Results show that the numerical simulation results of the improved SST turbulence model can be more close to the experimental data, and the sweep frequency method can better reflect nonlinear characteristics of the vortexinduced vibration.

Key words: two degrees of freedom, vortexinduced vibration, turbulence model, sweep frequency method, numerical simulation

CLC Number:

U 661.1

NI Wenchi1,2，KANG Zhuang1，ZHANG Cheng1，ZHANG Lijian1. Simulation of Two Degrees of Freedom VortexInduced Vibration by
Using Improved Shear Stress Transport Model[J]. Journal of Shanghai Jiaotong University, 2017, 51(7): 819-825.

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