台风下乙烯精馏塔抗风性能及可靠性分析

采用流固耦合方法对台风下乙烯精馏塔的风载荷分布及风振响应进行数值模拟,建立了台风下塔设备流固耦合数值模型,对乙烯精馏塔的抗风能力和可靠性进行了分析。研究发现乙烯精馏塔的迎风面为风压力,背风面和迎风子午线两侧为风吸力,风压力和风吸力沿着塔高不断增大。在风载荷作用下,乙烯精馏塔的最大应力出现在迎风向塔体与裙座的连接处,最大变形出现在塔顶。随着风速增大,最大应力和变形呈三次多项式的变化关系,但频率基本保持不变,呈现一阶频率振动。通过强度、挠度和疲劳分析,可对不同台风强度下的乙烯精馏塔可靠性进行校核。

Wind-resistance Performance and Reliability Analysis of Ethylene Rectifying Tower in Typhoon

In this study,the wind load distribution and wind-induced response of ethylene rectifying tower were simulated by fluid-solid coupling method.The wind-resistance performance and reliability analysis of the ethylene rectifying tower were analyzed by the fluid-solid coupling numerical simulated model.It is found that the windward side of the ethylene distillation column is the wind pressure,and the windward side and the windward meridian are the wind suction,and the wind pressure and the suction increase along the height of the tower.Under the wind load,the maximum stress of the ethylene distillation column occurs at the connection of the windward column body and skirt body,and the maximum deformation occurs at the top of the column.With the increase of wind velocity,the maximum stress and deformation show a cubic polynomial relationship,while the frequency basically remains unchanged,presenting a first order frequency vibration.The reliability of the ethylene rectifying tower can be verified through strength,deflection and fatigue analysis.