| 埋地油气管道弯头的强度计算 |
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| 引用本文： | 邓道明,李育光.埋地油气管道弯头的强度计算[J].油气储运,1997,16(11):3-8. |
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| 作者姓名： | 邓道明 李育光 |
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| 作者单位： | 西南石油学院
(邓道明)，西南石油学院(李育光) |
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| 摘 要： | 通过理论分析导出了埋地弯头附加弯矩的新计算公式,其推导依据是:“弹性抗弯铰”假设,不考虑弯头受到的土壤抗力,但考虑弯头承受的内压;土壤对直管道纵向位移的抗力与纵向位移的关系为双线性,即考虑弹性工作段和极限平衡段(塑性工作段);土壤对直管道横向位移的抗力满足Winkler假定;将弯头两端的直管看作半无限长的梁或杆;同时考虑温差和内压对管道位移的影响。将新公式的计算结果与有关油气管道设计规范推荐公式的计算结果进行了比较。讨论了弯头的强度验算方法和管土相互作用参数的确定方法。推荐了实用的埋地弯头强度设计计算公式。
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| 关 键 词： | 埋地管道 弯头 位移应力 设计计算 公式 规范 讨论 |
Strength Calculations for the Elbows of Underground Oil or Gas Pipeline |
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| Deng Daoming Li Yuguang.Strength Calculations for the Elbows of Underground Oil or Gas Pipeline[J].Oil & Gas Storage and Transportation,1997,16(11):3-8. |
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| Authors: | Deng Daoming Li Yuguang |
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| Institution: | Deng Daoming Li Yuguang |
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| Abstract: | On condition that:(1)the "elastic flexual hinge" model is used,with soil reaction to elbow neglected and internal pressure subjected to the elbow concerned ;(2)the longitudinal soil force vs pipeline displacement is bilinear,that is,elastic section and limit equilibrium section(plastic)are discriminated;(3)the lateral soil force is proportional to the lateral displacement of pipeline;(4)the straight pipes connected tangen-tially with elbows are simplified as semi-infinite beams and/or rods;(5)temperature differences along with pressure are taken into account. New formulae for calculating bending moment of buried elbows are derived. The new calculation results are compared with those based on the recommended formulae in the oil-and-gas pipeline design specifications. The checking methods for the strength of buried elbows and determination methods of soil-pipe interaction parameters are disscussed. Practical strength design formulae for pipelines with elbows are recommended. |
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| Keywords: | buried pipeline elbow displacement stress design and calculation equation standard discussion |
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