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MODELING UNDERGROUND PIPE WITH PIPE STRESS ANALYSIS PROGRAM

机译:用管道应力分析程序对地下管道建模

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摘要

The objective of this paper is the modeling of underground pipe in granular or sandy soil using a Pipe Stress Program for the evaluation of thermal, and pressure, to produce verifiable results. The use of a beam type pipe stress program to accurately perform stress analysis of underground piping can produce various results depending on the modeling. An updated presentation is available in B31.1 piping code with technical references, which gives some guidance in the use of pipe stress modeling. Modeling in a conservative way is difficult because what may be conservative to the underground piping may not be conservative at above ground transitions. An accurate methodology is required that produces verifiable results. Verification is accomplished by comparison with the B31.1 example problem and manual calculation using "Beam on Elastic Foundation" Also discussed are the effects of SIF's and flexibility factors used in above ground pipe and their application to underground piping. Ovalization of the piping is inhibited by the soil and the SIF's and Flexibility factors are affected (pg 231). Recommendations are given in the conclusion for the accurate modeling using beam type pipe stress analysis programs.
机译:本文的目的是使用“管道应力程序”对粒状或沙质土壤中的地下管道进行建模,以评估热量和压力,以产生可验证的结果。使用梁型管道应力程序来准确执行地下管道的应力分析可以根据模型产生各种结果。 B31.1管道代码中提供了带有技术参考的更新演示,这为使用管道应力建模提供了一些指导。以保守的方式进行建模很困难,因为对于地下管道来说可能是保守的,而在地面以上的过渡处可能不是保守的。需要一种能够产生可验证结果的准确方法。通过与B31.1示例问题进行比较并使用“弹性基础上的梁”进行手动计算来完成验证。还讨论了地上管道中使用的SIF和柔性因子的影响及其在地下管道中的应用。土壤会阻碍管道的椭圆形化,并且会影响SIF和柔韧性因素(第231页)。结论中给出了使用梁式管道应力分析程序进行精确建模的建议。

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