Force Analysis and Structural Design of Non⁃metallic Pipe

doi:10.19491/j.issn.1001-9278.2021.03.013

Abstract

Abstract:

There is an urgent requirement for treating the harsh corrosive environment and special topography of the Shunbei Oilfield. The construction of ground gathering and transportation pipeline has to face a series of unfavorable factors such as the large dunes （drop > 10 m） and strong mobility （the period of sand storm > 1 month）. A study on the force analysis and structural design of metal pipe bodies and joints was carried out in this work. A finite element analysis software was employed to analyze the pipes with different inner diameters under different external pressure loads. The effect of pipe materials on the deflection and stress of the pipes under different loads was calculated. The designed structures were compared to find an optimal result to meet the requirement of use. The results indicated that the reinforcement layer acted as a main pressure-bearing layer under an internal pressure load. The damage of reinforcement layer represented the failure of the pipeline. The wind load under an external pressure load exhibited little influence on the pipeline， and however the inertial load and sand dune movement generated a greater impact on the suspended pipeline. The feasibility of the pipeline connection can be judged by stress analysis.

Key words: desert environment, inertial load, wind load, sand dune movement, pipe connection

CLC Number:

TQ320.72⁺4

ZENG Wenguang, DU Dongdong, GE Pengli, GAO Duolong, XIAO Wenwen, XU Yanyan. Force Analysis and Structural Design of Non⁃metallic Pipe[J]. China Plastics, 2021, 35(3): 90-96.

Figures/Tables 15

Fig.1. Structure diagram of GFT?RTP tube

参数	数值
密度/kg·m^-3	948
屈服强度/MPa	25
弹性模量（E_PE）/MPa	1 100
泊松比（μ_PE）	0.4

Tab.1. Parameters of PE100

E_x/MPa	E_y/MPa	E_z/MPa	G_x/MPa	G_y/MPa	G_z/MPa	μ_x	μ_y	μ_z
38 381	3 501	2 736	1 257	804	1 140	0.27	0.29	0.28

Tab.2. Parameters of CGFR?PECT materials

Fig.2. Deflection distribution under an inertial load with an inner diameter of 150 mm

Fig.3. Stress distribution under an inertial load with an inner diameter of 150 mm

Fig.4. Deflection distribution under wind load with an inner diameter of 150 mm

Fig.5. Stress distribution under a wind load with an inner diameter of 150 mm

Fig.6. Finite element deformation diagram of the pipeline under uniform load

Fig.7. Slip distance distribution of the inner diameter of 150 mm under 300 N·m of sand dune movement

Fig.8. Stress distribution of an inner diameter of 150 mm under sand dune movement of 300 N·m

Fig.9. Stress distribution curve of GFT?RTP under different load conditions

Fig.10. GFT?RTP displacement distance curves under different load conditions

Fig.11. Schematic diagram of pipe connection section

Fig.12. Model and meshing

Fig.13. Stress distribution of each layer of GFT?RTP with an inner diameter of 65 mm

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