大型非锚固变壁厚外浮顶原油储罐的应力测试

发布时间：2018-03-06 09:44

本文选题：大型非锚固油罐　切入点：变壁厚　出处：《油气储运》2017年10期 　论文类型：期刊论文

【摘要】：大型原油储罐多为非锚固变壁厚结构,在液压作用下,地基沉降会引起底板边缘板翘曲及壁厚变化处的应力波动等复杂现象。为了研究大型储罐受载后各圈壁板、底板的应力大小及其分布规律,采用电阻应变测量技术对水压试验中10×10~4 m~3的外浮顶原油储罐(直径80 m、罐高21.8 m)进行现场应力测试,得到储罐底板及壁板的应力数据,分析储罐关键部位的应力水平、分布特征及其原因。结果表明:在最高液位下,储罐底板主要表现为径向弯曲应力;储罐壁板根部主要为轴向弯曲应力,随测点高度升高,罐壁在水压作用下发生膨胀变形,主要表现为环向薄膜应力。该研究结果为储罐运行的安全评定提供了参考依据。
[Abstract]:The large crude oil storage tanks are mostly non-anchored variable wall thickness structures. Under hydraulic pressure, the settlement of foundation will cause complex phenomena such as the warpage of the bottom plate edge plate and the stress fluctuation at the change of the wall thickness. In order to study the wall plates of each ring after the large storage tank is loaded, The stress magnitude and its distribution of the bottom plate are measured by the resistance strain measurement technique. The stress data of the bottom plate and the wall plate of the tank are obtained by measuring the stress of the external floating roof crude oil storage tank (80 m in diameter and 21.8 m in height) in the hydraulic pressure test. The stress level, distribution characteristics and reasons of the key parts of the tank are analyzed. The results show that at the highest liquid level, the bottom plate of the tank is mainly shown as radial bending stress, and the root of the wall plate of the storage tank is mainly axial bending stress, which increases with the height of the measuring point. The expansion deformation of the tank wall under the action of water pressure is mainly reflected in the toroidal membrane stress. The results provide a reference for the safety assessment of the tank operation.
【作者单位】：中国石油大学(北京)机械与储运工程学院;中国石油化工股份有限公司抚顺石油化工研究院;中国石油天然气管道工程有限公司;
【基金】：国家重点研发计划资助项目“油气管道及储运设施完整性评价技术研究”,2016YFC0802105
【分类号】：TE972

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