Abstract
Effects of surface roughness on vortex-induced vibration (VIV) characteristics of a circular cylinder were studied numerically. The cylinder's VIV response amplitude, vortex-shedding frequency, structural vibration frequency and lock-in region under different surface roughnesses were analyzed contrastively. The numerical results showed that the whole reduced velocity interval can be divided into four regions including region I, region II, region III and region IV based on the cylinder's VIV response amplitude and frequency; with increase in roughness, the maximum value of the cylinder's VIV drops, the beginning point of the lock-in region slowly shifts to an earlier position while the lock-in region's ending point quickly shifts an earlier one, the width of the lock-in region becomes gradually narrower.
| Translated title of the contribution | Effects of surface roughness on vortex induced vibration features of a circular cylinder |
|---|---|
| Original language | Chinese (Traditional) |
| Pages (from-to) | 37-43 |
| Number of pages | 7 |
| Journal | Zhendong yu Chongji/Journal of Vibration and Shock |
| Volume | 37 |
| Issue number | 9 |
| DOIs | |
| State | Published - 15 May 2018 |
| Externally published | Yes |
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