Numerical Simulation of VortexInduced Vibration of Steel Tubular Members in Transmission Tower

Abstract:

A numerical simulation of still circular tube and dynamic singledegreeoffreedom (SDOF) circular tube was performed to study the vortexinduced vibration (VIV). The results show that in still case between the Reynolds number of 20k to 35k, the mean value of lift and drag coefficient amplitude are 1.472 and 1.273, respectively, which are in consistent with previous experimental investigations. The formation of vortexstreet is determined by the interference of the shear layers. The alongwind response is far less than acrosswind response during VIV. Based on the feasible SDOF model with dynamic mesh and relevant formulas, the 2D simulation is applied to fatigue analysis of 3D steel tubular members.