埋地悬空管道的应力分析及计算
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摘要
埋地管道由于受到各种潜在地质灾害的威胁,可能导致管道下方土层塌陷或流失,使管道处于悬空状态,引起管道失效,给管道运行带来安全隐患,并伴随带来严重的经济损失和人员伤亡。本研究基于Winkler线性理论,建立管-土相互作用力学模型,应用ABAQUS有限元分析软件得到悬空管道上的应力分布,分析得出管道达到屈服阶段时管道的悬空长度。计算结果表明:该材质管道在悬空长度达到160 m时,接近于屈服阶段。
The buried pipelines are threatened from various potential geological disasters, which may lead to earth collapse and soil loss under pipeline, thus to make the pipeline at suspended state, result in pipeline failure, bring the hidden safety problem into pipeline operation and causing severe economic losses and personnel casualty. In this article, based on Winkler linear theory,establishing mechanical model of pipe-soil interaction, using ABAQUS FEA software to achieve the stress distribution on suspended pipeline, obtained the pipeline suspended length in case of reaching yield stage. The calculation results indicated that this kind of pipeline is close to yield stage when the suspended pipeline length up to 160 m.
The buried pipelines are threatened from various potential geological disasters, which may lead to earth collapse and soil loss under pipeline, thus to make the pipeline at suspended state, result in pipeline failure, bring the hidden safety problem into pipeline operation and causing severe economic losses and personnel casualty. In this article, based on Winkler linear theory,establishing mechanical model of pipe-soil interaction, using ABAQUS FEA software to achieve the stress distribution on suspended pipeline, obtained the pipeline suspended length in case of reaching yield stage. The calculation results indicated that this kind of pipeline is close to yield stage when the suspended pipeline length up to 160 m.
引文
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[2]王峰会,赵新伟.高压钢管黄土塌陷情况下的力学分析与计算[J].油气储运,2004,23(04):6-8.
[3]由小川,庄茁,张效羽,等.高压天然气管线在地质灾害下的失效分析[J].天然气工业,1999,19(04):77-81.
[4]王小龙,姚安林.埋地钢管局部悬空的挠度和内力分析[J].工程力学,2008,25(08):218-222.
[5]杜景水,马廷霞,王维斌.基于小挠度理论的悬空管道力学分析[J].油气储运,2009,21(07):16-18.
[6]童华,祝效华,练章华,等.坍塌和冲沟作用下埋地管道大变形分析[J].石油机械,2007,35(11):29-32.
[7]博雷西A P,赛德博O M,西利F B,等.高等材料力学[M].北京:科学出版社,1987:39-67.
[8]唐永进.压力管道应力分析[M].北京:中国石化出版社,2003.
[9]马廷霞,吴锦强,唐愚,等.成品油管道的极限悬空长度研究[J].西南石油大学学报,2012(04):165-173.
[10]赵林,冯启民.埋地管线有限元建模方法研究[J].地震工程与工程振动,2001,21(02):53-57.
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