风载荷作用下浮顶储罐的屈曲模态分析

对风载荷作用下立式储罐发生变形失效的问题进行了研究。应用Workbench软件对浮顶储罐进行建模，利用特征值进行屈曲分析并绘制储罐的屈曲变形图。通过软件读取不同阶数的模态图，分析储罐发生变形的部位和原因，并研究不同风速下储罐迎风面和背风面罐壁应力的变化情况。结果表明，壳体位移以径向位移为主；随着罐壁高度的增加，风载荷引起的应力由以轴向应力为主转变为以周向应力为主；周向角为0°时等效应力总体呈上升趋势，周向角为180°时罐壁所受等效应力呈先减小后增大的趋势。研究结果可为储罐的抗风设计提供参考。

Buckling Mode Analysis of Floating Roof Storage Tank under Wind Load

The problems of deformation failure of vertical storage tank under wind load were studied. The floating roof tank was established by using the Workbench software. The eigenvalues were used for buckling analysis and the buckling deformation diagrams of the tank were plotted. The modal maps of different orders were read by software to analyze the locations and causes of deformation of the tank. And by changing the wind speeds, the changes of the stress on the windward and leeward sides of the tank were studied. The results show that the displacement of the shell is mainly radial displacement. As the height increases, the stress caused by wind load is mainly changed from axial stress to circumferential stress. The equivalent stress is generally rising at the circumferential angle of 0°. The equivalent stress of the tank wall at the circumferential angle of 180° decreases first and then increases. The research results can provide reference for the wind resistant design of storage tanks.