| 基于可靠度的油罐拱顶稳定性分析 |
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| 引用本文： | 何旺, 刘丽川, 李华南, 谢刚. 基于可靠度的油罐拱顶稳定性分析[J]. 力学与实践, 2013, 35(6): 38-43. doi: 10.6052/1000-0879-13-129 |
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| 作者姓名： | 何旺 刘丽川 李华南 谢刚 |
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| 作者单位： | 1 后勤工程学院军事供油工程系, 重庆 401311; 2 夹江78539 部队, 四川乐山 614100 |
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| 基金项目： | 军队后勤科研项目资助（油20080208）. |
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| 摘 要： | 根据加肋拱顶稳定性校核公式，应用结构可靠度理论，建立了油罐拱顶可靠性分析模型，对拱顶稳定性进行分析计算，以确定油罐拱顶的使用安全性. 运用最小距离法和有限差分法对该模型的可靠度进行求解.结合工程实例，分析了顶板自支承作用、肋板的加强作用在外载荷作用下对拱顶可靠指标的影响规律，拟合出可靠指标与拱顶各参数间数值关系. 通过对现役油罐拱顶稳定性进行可靠性评定，验证了该模型在现役条件下分析拱顶稳定性的可行性.
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| 关 键 词： | 储罐拱顶 可靠性 稳定性分析 最小距离法 有限差分法 |
| 收稿时间： | 2013-03-30 |
| 修稿时间： | 2013-07-13 |
STABILITY ANALYSIS FOR TANK-ROOF BASED ON RELIABILITY |
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| HE Wang, LIU Lichuan, LI Huanan, XIE Gang. STABILITY ANALYSIS FOR TANK-ROOF BASED ON RELIABILITY[J]. Mechanics in Engineering, 2013, 35(6): 38-43. doi: 10.6052/1000-0879-13-129 |
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| Authors: | HE Wang LIU Lichuan LI Huanan XIE Gang |
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| Affiliation: | 1 Department of Petroleum Supply Engineering, Logistical Engineering University, Chongqing 401311, China; 2 78539 Army in Jiajiang, Sichuan, Leshan 614100, China |
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| Abstract: | A reliability analysis model is established to analyze the stability of a tank based on the tank-roof stability checking formulae and the reliability theory. A new method for calculating and analyzing the reliability and the stability of the tank-roof by the minimum distance and finite difference methods is proposed. The analysis results of the tank as an engineering example by the proposed methods show that the self-supporting role of the roof-plates and the strengthened role of stiffened ribs would affect the reliability index of the tank-roof under different external loads. The curve fitting method is applied for expressing the numerical relationships between the reliability index and affecting factors. A reliability assessment is also performed to show the feasibility of analyzing the stability reliability of the dome roof for storage tanks in service. |
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| Keywords: | tank dome-roof|reliability|stability analysis|minimum distance method|finite difference method |
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