流固耦合对脱硫塔结构简化模型的动力反应分析

Fluid-solid coupling dynamic response analysis of a simplified desulfurization tower model

为研究流固耦合对脱硫塔结构简化模型动力反应的影响,采用有限元程序(Adina)模拟脱硫塔结构简化模型在地震作用下的流固耦合效应.首先对脱硫塔结构进行合理简化,在不同液位下进行了脱硫塔结构的模态分析,研究了塔内液位高度对脱硫塔结构的频率和振型的影响;其次,通过对脱硫塔结构进行地震波加载,研究了塔内液位高度、地震波输入角度和加速度峰值对脱硫塔结构的位移和加速度的影响,并与试验结果进行比较.结果表明,脱硫塔结构的频率会随着液位增高而减小,塔内液位高度、地震波加载方向及加速度峰值对脱硫塔结构加速度的影响比较大,而对其位移影响不大.

In order to study the influence of fluid-solid coupling on the dynamic response of a simplified desulfurization tower structure model,the fluid-solid coupling effects of the model under seismic waves were simulated by using the finite element program Adina.Firstly,the desulfurization tower structure was reasonably simplified,its modal analysis was done at different liquid levels,and the influences of the liquid level on its self-oscillation frequency and vibration mode were analyzed.Secondly,the effects of the liquid level,the input angle and the peak value of earthquake acceleration on the acceleration and displacement of the desulfurization tower were discussed by loading seismic waves and were compared with experimental results.The result shows that the self-oscillation frequency intensifies with the liquid level rising.The liquid level,the input angle and the peak value of earthquake acceleration all have great influence on the acceleration of the desulfurization tower,but they have little effect on the displacement of the desulfurization tower.