板式塔工作状态下塔顶挠度的计算  

Calculation of top deflection of tray column under working conditions

作　　者：张平[1,2] 王翠华[2] 吴剑华[2] 

机构地区：[1]天津大学化工学院,天津300072 [2]沈阳化工学院机械工程学院,辽宁沈阳110142

出　　处：《化学工程》2011年第8期37-39,共3页Chemical Engineering(China)

基　　金：中央支持地方高校发展专项资金项目(辽财指教[2010]865号)

摘　　要：板式塔在工作状态下,塔体受到横向载荷作用时,塔板发生倾斜,板上介质的液面仍保持水平,塔板上介质的质心将偏离塔体的轴线。每一层塔板上介质质心的变化都对塔体产生附加的偏心载荷,附加的载荷加剧了塔顶的挠度。推导了介质重心的偏心矩公式并利用力学的叠加原理和自编的计算程序,得到附加的偏心载荷对塔顶产生的附加挠度。分析和计算的结果表明:对于小直径板式塔,附加挠度大约占最大挠度的1/2;直径大于2 m的板式塔,附加的挠度已经超出了最大挠度的控制值,所以对于工作状态下的板式塔塔顶挠度的计算,应该考虑塔板上介质重心的偏离,尤其对于直径比较大的高塔。The column plate inclines when the tray column is subjected to lateral loads under operating conditions. The gravity centre of liquid on the column plate deviates from the axis of the column, because the liquid level on the column plate keeps in horizontal. The change of the gravity centre of liquid on every column plate produces additional eccentric loads that may intensify the top deflection of tray column. The formula of eccentricity of the gravity centre of liquid was deduced. Using superposition principle of mechanical and the self-edit program, the influence of top deflection with the additional eccentric loads was derived. The results of the analysis and calculation show that for the tray column with a small diameter, additional deflection is the half of the maximum deflection; for the tray column with diameter exceeding 2 m, the additional deflection exceeds the control values of the maximum deflection. The eccentricity of the gravity centre of liquid should be considered when top deflection of tray column is calculated under working conditions, especially the high column with a bigger diameter.

关 键 词：塔设备 塔板 挠度 偏心载荷 

分 类 号：TQ053.5[化学工程]