复合材料增强管线钢管压力设计新方法

doi:10.7623/syxb202008012

石油学报 ›› 2020, Vol. 41 ›› Issue (8): 1025-1032.DOI: 10.7623/syxb202008012

复合材料增强管线钢管压力设计新方法

王言聿¹, 成志强¹, 郭旭²

1. 西南交通大学力学与工程学院应用力学与结构安全四川省重点实验室四川成都 610031;
2. 中国石油天然气股份有限公司管道分公司管道科技研究中心河北廊坊 065000

收稿日期:2019-03-25 修回日期:2020-06-22 出版日期:2020-08-25 发布日期:2020-09-01
通讯作者: 成志强,男,1969年8月生,1991年获江汉石油学院石油机械专业学士学位,2005年获西南交通大学固体力学专业和法国FRANCHE-COMTE大学材料成型专业博士学位,现为西南交通大学教授、硕士生导师,主要从事结构安全评估与修复研究工作。Email:chengzhiqiang010@163.com
作者简介:王言聿,男,1987年3月生,2009年获西南科技大学工程力学专业学士学位,现为西南交通大学博士研究生,主要从事结构安全评估研究工作。Email:ismira@126.com
基金资助:
教育部高等学校博士学科点科研基金专项（20110184110017）资助。

A new method for the pressure design of composite reinforced line pipe

Wang Yanyu¹, Cheng Zhiqiang¹, Guo Xu²

1. Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province, School of Mechanics and Engineering, Southwest Jiaotong University, Sichuan Chengdu 610031, China;
2. PetroChina Pipeline Research and Development Center, Hebei Langfang 065000, China

Received:2019-03-25 Revised:2020-06-22 Online:2020-08-25 Published:2020-09-01

摘要/Abstract

摘要：

复合材料增强管线钢管（CRLP）是一种具有高承压能力的新型管道，其应用日趋广泛，但相应的管道压力设计方法尚不完善。对现有规范的分析表明，现有压力设计模式已不适合组合型管道。通过以CRLP平均环向应变作为设计的显式失效判据，并区别不同工况下的失效模式，确定相应的安全系数。基于组合薄壁圆筒模型，分别导出了是/否进行预应力处理的压力设计公式。压力设计公式考虑了CRLP几何尺寸、管线钢和复合材料力学性能对设计压力的影响。算例分析表明，对于未经过预应力处理而直接投用的CRLP，主要的失效模式是试压过程中产生过量残余变形；而对于进行过预应力处理的CRLP，主要失效模式转变为工作压力下的蠕变破坏。预应力处理可以一定程度上提高CRLP的设计压力，并有助于充分利用复合材料的承载能力。

关键词: 复合材料增强管线钢管, 设计压力, 预应力处理, 失效模式, 残余应变

Abstract:

Composite reinforced line pipe (CRLP)is a new type of pipeline with high pressure bearing capacity, and is appliced more and more widely, but the corresponding design method of pipeline pressure is not perfect yet. The analysis of existing specifications shows that the existing pressure design model is no longer suitable for combined pipelines. The corresponding safety factor is determined by using CRLP mean hoop strain as the explicit failure criterion for design and distinguishing the failure modes under different working conditions. Based on the combined thin-walled cylinder model, this paper derives pressure design formulas for prestressing treatment (Y/N), respectively. The pressure design formulas consider the influence of CRLP geometry, mechanical properties of pipeline steel and composite on design pressure. The analysis of examples shows that for CRLP directly used without prestressing treatment, the main failure mode is shown as the excessive residual deformation generated during pressure test; and for CRLP after prestressing treatment, the main failure mode is transformed as creep failure under the working pressure. Prestressing treatment can increase the design pressure of CRLP to a certain extent, and help to make full use of the bearing capacity of composite.

Key words: composite reinforced line pipe, design pressure, autofrettage, failure mode, residual strain

中图分类号:

TE973

王言聿, 成志强, 郭旭. 复合材料增强管线钢管压力设计新方法[J]. 石油学报, 2020, 41(8): 1025-1032.

Wang Yanyu, Cheng Zhiqiang, Guo Xu. A new method for the pressure design of composite reinforced line pipe[J]. Acta Petrolei Sinica, 2020, 41(8): 1025-1032.

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复合材料增强管线钢管压力设计新方法

A new method for the pressure design of composite reinforced line pipe

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