超临界CO_(2)管道止裂韧性预测模型研究  

Prediction Model for Crack Arrest Toughness of Supercritical CO_(2) Pipeline

作　　者：曹宇光[1] 甄莹 刘媛媛 张振永 白芳 Cao Yuguang;Zhen Ying;Liu Yuanyuan;Zhang Zhenyong;Bai Fang(College of Pipeline and Civil Engineering,China University of Petroleum(East China);China Petroleum Pipeline Engineering Co.,Ltd.(Engineering))

机构地区：[1]中国石油大学(华东)储运与建筑工程学院,山东省青岛市266580 [2]中国石油管道局工程有限公司设计分公司

出　　处：《石油机械》2024年第7期28-35,共8页China Petroleum Machinery

基　　金：国家自然科学基金项目“超临界CO_(2)管道流固耦合力学行为与止裂控制模型研究”(12202502);国家自然科学基金项目“基于断裂过程正演与反演的高钢级输气管道止裂预测模型研究”(12272412);山东省自然科学基金项目“基于热-流-固耦合的超临界CO_(2)管道断裂机理及裂纹扩展速度预测模型研究”(ZR2022QE039);中央高校基本科研业务费专项资金项目“超临界CO_(2)管道止裂力学机制研究”(23CX03002A)。

摘　　要：碳中和目标下,超临界态CO_(2)管道输送已成为碳捕集利用与封存(CCUS)技术发展的必然趋势。然而,目前超临界CO_(2)管道止裂控制体系尚未构建,管材止裂韧性难以预测,成为限制其广泛应用的瓶颈问题之一。针对该问题,通过归纳国内外相关文献及规范标准,对超临界CO_(2)管道止裂控制研究进展及最新标准体系进行了简要综述;在系统收集已开展CO_(2)管道全尺寸爆破试验信息及数据的基础上,对现有止裂韧性预测模型适用性进行了讨论,由此确定了CO_(2)管道止裂韧性预测模型修正形式,并对不同模型适用范围及预测结果进行了讨论。研究结果表明,建立的修正模型解决了传统止裂预测模型过于激进的问题,同时降低了DNV推荐方法的保守性。建议将修正模型与DNN预测方法相结合,以使管材韧性值处于止裂区域;同时开展高效准确的CO_(2)管道裂纹动态扩展数值模拟。所得结果可为我国CO_(2)管道止裂设计提供指导。Under the goal of carbon neutrality,the supercritical CO_(2) pipeline transportion has become an inevitable trend in the development of carbon capture,utilization and storage(CCUS)technology.However,the crack arrest control system of supercritical CO_(2) pipeline has not been established up to now,and the crack arrest toughness of pipe is difficult to be predicted,which has become one of the bottleneck problems limiting its widespread application.Through review of literatures,specifications and standards,the research progress and latest standard system of crack arrest control for supercritical CO_(2) pipelines were presented in brief.On the basis of systematically collecting full-scale burst test information and data of CO_(2) pipelines,the applicability of existing crack arrest toughness prediction models was discussed,thus determining the modified form of crack arrest toughness prediction model of CO_(2) pipelines.Moreover,the applicability and prediction results of different models were discussed.The research results show that the established modified model solves the too aggressive problem of traditional crack arrest prediction model while reducing the conservatism of DNV recommended method.It is proposed to combine the modified model with the DNN prediction method to ensure the toughness value of the pipe to be in the crack arrest range,and simultaneously carry out efficient and accurate numerical simulation of dynamic crack propagation of CO_(2) pipelines.The research results provide guidance for the crack arrest design of CO_(2) pipelines in China.

关 键 词：超临界CO_(2) 管道输送 延性断裂 双曲线模型 断裂 韧性 夏比冲击功 止裂控制 

分 类 号：TE355[石油与天然气工程—油气田开发工程]