| 裂纹尖端张开角及在输气管线止裂预测中的应用 |
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| 引用本文： | 冯耀荣,庄茁,庄传晶,由小川,霍春勇.裂纹尖端张开角及在输气管线止裂预测中的应用[J].石油学报,2003,24(4):99-102,107. |
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| 作者姓名： | 冯耀荣 庄茁 庄传晶 由小川 霍春勇 |
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| 作者单位： | 1. 中国石油天然气集团公司管材研究所, 陕西西安, 710065;2. 清华大学工程力学系, 北京, 100084 |
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| 基金项目： | 中国石油天然气集团公司应用基础研究项目 (2 0 0 0J3 0 2 )资助 |
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| 摘 要： | 介绍了一种近年来新发展的输气管线断裂控制参量——裂纹尖端张开角(CTOA)的计算模型及方法.国际上计算输气管线动态断裂与止裂的PFRAC软件中视裂纹扩展速度为常数.针对这一问题,利用Alliance管线的实物爆破试验结果,通过分析和模拟提出了一种新的输气管线裂纹扩展速度的衰减模式,并引入到PFRAC计算程序中.采用改进的计算方法和程序,结合西气东输管线,研究了CTOA与止裂长度的关系,分析了输送压力、管材壁厚等因素对西气东输管线动态断裂及止裂的影响.裂纹尖端张开角可用于中国管道动态延性裂纹和止裂的定量评价.
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| 关 键 词： | 输气管线 断裂控制 动态断裂 止裂 裂纹尖端张开角 断裂速度 衰减模式 西气东输管线 |
| 文章编号： | 0253-2697(2003)04-0099-04 |
| 收稿时间： | 2002-2-5 |
| 修稿时间： | 2002-11-6
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Crack tip opening angle and its application to crack arrest in gas pipeline |
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| FENG Yao-rong,ZHUANG Zhuo,ZHUANG Chuan-jing,YOU Xiao-chuan,HUO Chun-yong.Crack tip opening angle and its application to crack arrest in gas pipeline[J].Acta Petrolei Sinica,2003,24(4):99-102,107. |
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| Authors: | FENG Yao-rong ZHUANG Zhuo ZHUANG Chuan-jing YOU Xiao-chuan HUO Chun-yong |
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| Affiliation: | 1. Tubular Goods Research Center, CNPC, Xi'an 710065, China;2. Engineering Mechanics Department, Tsinghua University, Beijing 100084, China |
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| Abstract: | The calculating model and method for crack tip opening angle (CTOA) were introduced.A new decay model for propagation speed of crack on gas pipeline was proposed with fitting and analyzing the burst test results of Alliance pipeline.The model was incorporated in the PFRAC program.The relationship between CTOA and crack_arrested length,the effects of operating pressure and wall thickness of pipeline on dynamic fracture and arrest of the west_east gas transmission pipeline in China were analyzed by the use of modified PFRAC program. |
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| Keywords: | gas transmission pipeline fracture control dynamic fracture crack arrest crack tip opening angle fracture speed decay model west_east gas transmission pipeline |
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