大型石油储罐的风载荷响应分析

Response of Large Scale Oil Storage Tanks Subjected to Wind Load

主要研究了大型石油储罐在风载荷作用下的响应。首先,介绍了风载荷分析时用到的风压模型,并建立了储罐的有限元模型;然后,对储罐进行了模态分析;最后,分别计算了储罐在静态风压和动态风压模型下的响应。结果表明:储罐的模态呈多波分布,该振动为储罐周向振动和竖向振动的叠加。在静态风压模型下,储罐的最大位移发生在靠近储罐罐顶的罐壁某处;最大应力发生在罐壁与地板的连接处。在动态风压模型下,动态响应的峰值(如位移和应力峰值)延迟于风载荷峰值的出现。

This work was to study the response of large scale oil storage tanks subjected to wind load.Firstly,the wind pressure model and the finite element model of the tank were introduced.Then,modal analysis was conducted.Finally,wind responses of the tank under the static and dynamic wind pressure models were studied.The results show that the vibration is the mutil-wave vibration,which is the superposition of the circumferential and vertical vibrations.For the tank under the static wind pressure,maximum displacement occurs on the tank wall close to the top edge,while maximum stress happens on the joint between the bottom plate and the tank wall.For the tank under the dynamic wind pressure,there is a time delay between the peak response（e.g.displacement and stress） and the maximum load.