..., 1984). circular cylinder simulation oscillation upper branch viv frequency response strips vibration amplitude smooth cylinder cylinder vortice vortex-induced vibration williamson frequency lower branch experiment wake structure symmetric strips Proceedings of the Thirty...

... branch appears as 4.2 < U* < 6.5 and reaching the maximum non-dimensional amplitude of 0.86. It is found that the vibration of the upper branch is extremely unstable, and the three-dimensional flow is stronger at this time. The 2S and 2P vortex shedding modes coexist along the cylinder span at U...

... change of vortex modes at U*= 2.9375, which corresponds to maximum amplitude of vibration, indicates the upper branch should be described as intermittent switching between initial and lower branch. The computational results of response of cylinder and the vortex mode in the wake are in good agreement...

... mounted in linearly elastic supports; Khalak & Williamson, (1996), Parra (1996). The upper branch of oscillation occurs for higher reduced velocities than in the case of rigid models. A jump phenomenon, from the lower to the upper branch, has been observed giving further evidences of a hysteresis...