摘要
以埋地管道为研究对象,建立了管道、内部流体与土体三维有限元模型,对埋地管道外爆载荷及管道响应进行了计算,得到管道、管道内流体、管土间耦合方式对爆炸冲击波及管道响应的影响情况。计算结果表明,由于管道结构对爆炸冲击波的反射作用,使得管道表面的爆炸压力增大;管土间采用罚函数耦合方式要比完全耦合方式下的外爆峰值压力减小80%以上,而管道受到的最大应力峰值减小70%以上;由于管道内流体对爆炸压力的缓冲作用,使得管道表面承受的外爆载荷降低,管道应力峰值降低10%左右,管土间采用完全耦合方式下管道最大应力发生在管道迎爆面正对爆心一侧,管土间采用罚函数耦合方式下管道最大应力发生在管道上下侧面。
A three-dimensional finite element model was established for the pipeline,internal fluid and soil mass with the buried pipeline as the research object.The explosion pressure load and the response of the buried pipeline were calculated,and the influences of the pipeline,fluid in the pipeline and coupling mode between the pipeline and the soil mass on explosion shock wave and the pipeline response were obtained .The calculation results show that the explosion pressure on the pipeline surface increases due to the shock wave reflection effect of the pipe structure;the peak explosion pressure under penalty coupling mode between the pipeline and soil mass is decreased by more than 80% compared to that under full coupling mode,and the maximum peak stress on the pipeline is decreased by more than 70%;due to the buffering effect of the fluid in the pipeline on the explosion pressure,the explosion load received on the pipeline surface decreases,the peak stress on the pipeline is decreased by about 10%.The maximum stress on the pipeline under full coupling mode between the pipeline and soil mass occurs on the surface of the pipeline facing the explosion center,and the maximum stress of the pipeline under penalty coupling mode between the pipeline and soil mass occurs on the upper and lower sides of the pipeline.
作者
丁宇奇
周辉宇
戴子威
李为卫
马秋荣
DING Yu-qi;ZHOU Hui-yu;DAI Zi-wei;LI Wei-wei;MA Qiu-rong(Mechanical Science and Engineering Institute,Northeast Petroleum University,Daqing 163318,China;State Key Laboratory of Performance and Structural Safety for Petroleum Tubular Goods and Equipment Materials,Xi′an 710077,China)
出处
《压力容器》
北大核心
2018年第12期18-25,共8页
Pressure Vessel Technology
基金
国家自然科学基金项目(51604080)
中国博士后科学基金项目(2017M621240)
黑龙江省普通本科高等学校青年创新人才培养计划(UNPYSCT-2017036)
黑龙江省留学回国人员择优资助项目(2017QD0033)
黑龙江省博士后基金项目(LBH-Z17037)
中国石油和化学工业联合会科技指导计划项目(2016-01-01)
中国石油科技创新基金项目(2017D-5007-0610)
关键词
埋地管道
外爆载荷
完全耦合
罚函数耦合
管道响应
buried pipeline
explosion load
full coupling
penalty function coupling
pipe response
