Analitical Study of Vertical and Lateral Buckling on Pipeline Using Hobbs Method

Y. Hadiwidodo, Muhammad M Romadhoni, H. Pratikno
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Abstract

During its operation, the pipeline will receive loads of internal pressure and thermal loads of fluid flowed until the pipes have both vertical and lateral buckling. Numerical analysis of vertical and lateral buckling Hobbs this method on a high friction coefficient and the coefficient of friction (0.3 ≤ φ ≤ 0.7) as well as the length of buckling as many as 20 variants were then performed comparisons, as well as axial tension comparison with DnV RP L110. So we get the relationship of temperature increase with the length and amplitude buckling. The data which is used is the gas pipeline Labuhan Maringgai-Muara Bekasi PT. Perusahaan Gas Negara (Persero) Tbk., Including the outer diameter of the pipe = 0.8128 m, plate thickness = 0.015875 m, thermal linear expansion coefficient = 11 x 10-6 m / oC, etc. So the higher coefficient of friction, temperature rise of 13.4%, 13.4% reduced buckling length, and axial tension increased to 12.95%. For the comparisons, the coefficient of friction does not affect the length of buckling on the vertical buckling. Comparison with DnV RP F110, increased coefficient of friction will increase the voltage axial (Seff) of 0.00024% and up 13.4% axial stress (P0) Hobbs.
基于Hobbs方法的管道纵向和横向屈曲分析研究
在管道运行过程中,管道将承受内压载荷和流动流体的热载荷,直至管道发生垂直和侧向屈曲。数值分析了该方法对滚刀垂直和侧向屈曲的高摩擦系数和摩擦系数(0.3≤φ≤0.7)以及屈曲长度等多达20种变型进行了比较,并与DnV RP L110进行了轴向拉伸比较。得到了温度升高与屈曲长度和屈曲幅度的关系。所使用的数据是Labuhan maringai - muara Bekasi PT. Perusahaan gas Negara (Persero) Tbk天然气管道。,包括管道外径= 0.8128 m,板厚= 0.015875 m,热膨胀系数= 11 × 10- 6m / oC等。因此摩擦系数较高,温升为13.4%,屈曲长度减少13.4%,轴向拉力提高到12.95%。在竖向屈曲上,摩擦系数对屈曲长度没有影响。与DnV RP F110相比,摩擦系数的增加使轴向电压(Seff)增加0.00024%,轴向应力(P0) Hobbs增加13.4%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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