80m高钢烟囱的风振分析

本文从烟囱频率、风振频率和雷诺数三方面研究了该烟囱的振动问题。用有限元方法和简化算法等多种方法汁算了烟囱频率,基频与实测结果相差小于5％。确定了与风共振区域和振动的原因,提出了计算烟囱基频的修改简化公式和消除或减轻烟囱振动的具体措施。

Wind Vibration Analysis of a 80m Tall Steel Chimney

In this paper, the vibration problem of a chimney is studied from the aspects of chimney frequencies, wind vibration frequencies and Reynolds number. The chimney frequencies were calculated by many methods, such as FEM and simplified method. The error between the fundamental frequency calculated and the measured value is less than 5 % . The resonance domain with wind and the reasons of vibration were found. A simplified formula for calculating the fundamental frequency of chimney is modified. Concrete measures to mitigate the vibration of the chimney are presented.