烟气脱硫塔风诱导振动的TMD控制研究

Research on TMD Control for Flue Gas Desulfurization Towers under Wind-induced Vibration

针对高塔设备风诱导振动的实际问题,提出采用调谐质量阻尼器(TMD)对其进行被动控制。以某烟气脱硫塔为例,运用数值仿真技术,首先通过模态分析获得结构的自振特性,然后利用谐响应分析研究调谐质量阻尼器控制效果随其参数变化的一般规律,并应用更为精确的时程分析法对减振前后高塔设备的风诱导振动情况进行了对比分析。研究结果表明:质量、频率比及阻尼比对控制效果有重要影响,应对其进行优化。参数优化后,塔顶的最大振幅减小了89.4%,减振效果十分显著。

Tuned mass damper （TMD） was proposed to control wind induced vibration of high towers. As an example, natural vibration characteristics of a flue gas desulfurization tower were obtained through mo- dal analysis by applying numerical simulation technology. Then the general law of TMD control effect with parameter changes was studied by using the harmonic response analysis. Based on the more accurate time - history analysis, the wind - induced vibration response of high tower was obtained and the effect of wind - induced vibration control was also discussed. Analysis results indicate that the mass, the frequency ratio and the damping ratio have significant effect on structural vibration control. So it is necessary to optimize these parameters. With the optimal parameters of TMD, the maximum amplitude of tower top is reduced by 89.4% and vibration damping effect is excellent.