高耸塔器风致振动的现场实测与疲劳分析

摘要

The field measurement and fatigue calculation and analysis of a wind-induced vibration of a 75m-high rectifying tower were implemented, including making use of wireless dynamic strain gage and random dec-rement method to get modal parameter of the tower and adopting high-speed static strain indicator to measure the tower' s stress strain in vibration.Results showed that, the tower can resist the vibration damage caused by the across-wind resonance.Calculating and analyzing this wind-induced vibration through combining the code stipulation with field measurement can accurately evaluate the across wind-induced fatigue damage to the tower suspended or in maintenance condition.This method can provide a reference for analyzing wind-induced tower vibration.%针对某一高度约为75m的精馏塔在检修时的风致振动进行了现场实测和疲劳计算分析.利用无线动态应变仪,结合随机减量法获得塔器的模态参数,利用高速静态应变仪测得塔器振动时的应力应变.结果表明,该精馏塔在检修状态下可以抵抗横风向共振引发的疲劳破坏.采用现场测试与标准相结合对塔器风致振动进行计算分析,可以较为准确地评估空塔或检修条件下塔器横风向振动可能引起的疲劳破坏,该研究方法可为塔器风致振动分析提供参考.