加强板输气管道的结构设计与可行性研究
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摘要
针对天然气管道直跨河流的可行性问题,进行管道应力的理论计算。考虑内压、风载和重力的耦合作用,建立加强板输气管道的有限元模型,分析研究实际工况下的应力分布、整体形变、固有频率和模态振型情况,并通过强度试验和实际运行验证其可行性。结果表明:加强板输气管道结构设计合理,强度符合许用应力需求,可有效避开地震反应谱特征周期。
With respect to the feasibility of that natural gas pipeline crosses river, the theoretical calculation of piping stress was carried out. Taking into account of the coupling of the loads from internal pressure, wind and gravity, finite element model for the piping with reinforcing plate was established. The stress distribution, integral deflection, natural frequency and vibration modals were analyzed. And then with strength test and practical operation, the feasibility was verified. It was shown from the results that the structural design of this piping was suitable, so the strength of the piping system reached requirement and it can effectively bypass the eigenperiod in seismic response spectrum.
With respect to the feasibility of that natural gas pipeline crosses river, the theoretical calculation of piping stress was carried out. Taking into account of the coupling of the loads from internal pressure, wind and gravity, finite element model for the piping with reinforcing plate was established. The stress distribution, integral deflection, natural frequency and vibration modals were analyzed. And then with strength test and practical operation, the feasibility was verified. It was shown from the results that the structural design of this piping was suitable, so the strength of the piping system reached requirement and it can effectively bypass the eigenperiod in seismic response spectrum.
引文
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[2]Zhang J,Liang Z,Zhao G H.Mechanical behaviour analysis of a buried steel pipeline under groundoverload[J].Engineering Failure Analysis,2016,63(5):131-145.
[3]Zhang J,Liang Z,Zhang H,et al.Failure analysis of directional crossing pipeline and design of a protective device[J].Engineering Failure Analysis,2016,66(8):187-201
[4]Jalali H H,Rofooei F R,Attari N K A,et al.Experimental and finite element study of the reverse faulting effects on buried continuous steel gas pipelines[J].Soil Dynamics and Earthquake Engineering,2016,86(7):1-14.
[5]白路遥,施宁,李亮亮,等.基于蒙特卡洛法的埋地悬空管道结构可靠度分析[J].西安石油大学学报(自然科学版),2016,31(5):48-52,59
[6]Sollund H A,Vedeld K,Fyrileiv O,et al.Improved assessments of wave-induced fatigue for free spanning pipelines[J].Applied Ocean Research,2016,61(9):130-147.
[7]Horowitz B,Barreto S P S.Nonlinear analysis of a prestressed steel pipeline crossing[J].Engineering Structures,2006,28(3):390-398.
[8]Brodniansky J,Magura M,Slivansky M.Increasing the Durability and Safety of Pipeline Bridges[J].Procedia Engineering,2016,156:69-74.
[9]左雷彬,马红昕,铁明亮,等.油气管道斜拉索跨越设计[J].油气储运,2015,34(9):1010-1014,1026.
[10]郑彦渊.增大管道跨度方法的研究[J].管道技术与设备,2016(2):8-10.
[11]吴晓南,卢泓方,黄坤,等.基于频谱分析的地震带输气管道应力分析方法[J].天然气工业,2014,34(5):152-157.
[12]胡小坡,李倩,武海江,等.油气管道空气试压方案研究与分析[J].现代化工,2015,35(9):189-192.