Abstract

Industrial chimneys, launch vehicles and stacks are examples of large diameter circular cross section structures that can be prone to cross-wind vortex-induced vibration (VIV). VIV has been extensively studied for both fundamental and applied issues, but few documented studies concern high Reynolds number regimes (> 5 × 10⁵) in atmospheric turbulent wind. This paper introduces a field test on a slender light and low damped chimney designed to experience “super-critical” VIV at moderate wind velocity. The chimney was recently erected in a wind monitored field, near the Atlantic coast of France. The purpose of this paper is to present the first vibration results obtained during a sequential 13-day period in September 2020. A statistical analysis has been performed on the amplitude and dominant frequency responses and results are reported in term of probability distribution as a function of wind speed and direction. VIV events of low (<15% of diameter) to moderate amplitude (>30% of diameter) have been highlighted in a range of wind velocity 25% lower than expected, along with significant influence of the wind direction – low turbulence easterly wind giving vortex-induced vibrations with the highest amplitude.

摘要

工业烟囱、运载火箭和烟囱是大直径圆形横截面结构的例子，它们容易产生侧风涡激振动 (VIV)。VIV 已针对基础和应用问题进行了广泛研究，但很少有文献研究涉及高雷诺数机制 (> 5 × 10 ⁵) 在大气湍流风中。本文介绍了对细长轻型和低阻尼烟囱的现场测试，该烟囱旨在在中等风速下体验“超临界”VIV。烟囱最近竖立在法国大西洋沿岸附近的风监测场中。本文的目的是介绍在 2020 年 9 月连续 13 天期间获得的第一个振动结果。对幅度和主频率响应进行了统计分析，结果以概率分布的形式报告为风速和风向。在风速比预期低 25% 的范围内突出显示了低（<15% 直径）到中等幅度（>30% 直径）的 VIV 事件，