调谐质量惯容系统对高耸脱硫塔风振控制研究

Study on Wind-Induced Vibration Control of a Desulphurization Tower Based on Tuned Mass Inerter System(TMIS)

高耸脱硫塔属于圆截面薄壁钢结构,具有柔度大、阻尼小、上部截面突变等特征,在风荷载作用下易发生较为强烈的顺风向和横风向振动.为实现脱硫塔风致振动的有效与轻量化控制,引入调谐质量惯容系统(TMIS),基于推导的脱硫塔-TMIS耦合系统频响函数,分别建立了TMIS对脱硫塔的顺风向和横风向减振参数优化设计方法,并对比分析了TMIS、传统调谐质量阻尼器(TMD)、调谐质量惯容阻尼器(TMDI)对脱硫塔的减振效果.结果表明:以脱硫塔频域响应和H∞范数为目标优化设计的TMIS对脱硫塔顺风向和横风向风致振动均有较好的控制效果;与顺风向减振相比,TMIS横风向减振具有更好的轻量化效应;与TMD、TMDI相比,TMIS表现出较好的减振优势.

The tall desulphurization tower belongs to the thin-wall steel structure with round section,which has the characteristics of large flexibility,small damping and abrupt change of upper section.Under wind load,the tower is prone to severe vibration in along-wind and across-wind directions.In order to realize efficient and lightweight control of the wind-induced vibration of the tower,a tuned mass inerter system(TMIS)is adopted in this study.Based on the derived frequency response function formula of the desulfurization tower-TMIS coupling system,theoptimal design method of the TMIS for both along-wind and across-wind induced vibration control of the toweris established.Finally,the vibration control performance of TMIS on the tower is compared with that of traditional tuned mass damper(TMD)and tuned mass damper inerter(TMDI).The results show that the TMIS optimized with the frequency domain response and H∞norm as targets has excellent control performance on vibration mitigation of the tower in both along-wind and across-wind directions.Moreover,the TMIS demonstrates better lightweight effect on vibration control in across-wind direction than that in along-wind direction,and its control performance is superior over that of the TMD and TMDI.