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工程力学  2013 

河流穿越高压输气管道临界悬空长度的数值模拟研究

DOI: 10.6052/j.issn.1000-4750.2011.09.0624, PP. 152-158

Keywords: 输气管道,河流穿越,河床变化,临界悬空长度,数值模拟

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Abstract:

高压输气管道穿越河流时的力学行为受诸多因素影响,河床边界条件的变化是重要影响因素之一。该文基于流体动力学和固体力学理论,利用有限元软件FLUENT和ANSYS对高速水流冲击下的悬空管道进行了模拟分析。在总结出河床变化时悬空管道最大应力、位移变化规律的基础上,得到不同水流速度作用下高压输气管道的临界悬空长度。并对“西气东输”一线和“川气东送”等管线工程进行实例分析,所得计算结果对高压输气管道的日常维护和制定抗洪抢险方案具有一定的参考价值。

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