API 5L X56管中管横向冲击性能的数值研究

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Abstract With the vigorous development of the offshore oil industry, the exploitation of oil and gas fields is gradually moving into the deep sea, and the requirements for the performance of submarine pipelines are also continuously improved. Pipe-in-pipe has good thermal insulation properties and is gradually being used. To systematically study the lateral impact resistance of the pipe-in-pipe, a numerical model was established using a nonlinear finite element code and verified with experimental data. The parametric study found that under certain impact energy, the energy absorbed by the polyurethane foam accounts for a smaller proportion than the sum of the energy absorbed by the inner tube and the outer tube of pipe-in-pipe. With the increase of the wall thickness and the steel grade of the pipe-in-pipe, the degree of local indentation of the pipe decreases, and the ability of submarine pipe-in-pipes to resist impact deformation is stronger. As the overhang length of the pipe-in-pipe increases, the residual displacement of the mid-span section of the pipe-in-pipe gradually increases, while the residual deformation of the cross-section and the depth of local indentation gradually decrease, and the proportion of the global bending deformation increases gradually, while the proportion of local indentation decreases.

Key words： pipe-in-pipes impact resistance polyurethane foam parameter study local indentation

Received: 08 March 2022 Published: 15 July 2023

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	Articles by authors
	GAO Xudong1
	SHI Jian1
	SHAO Yongbo2
	LI Kangshuai2

Cite this article:

GAO Xudong1,SHI Jian1,SHAO Yongbo2, et al. Numerical investigation of transverse anti-impact performance of API 5L X56 pipe-in-pipe[J]. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(13): 92-102.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2023/V42/I13/92

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