爆炸荷载下埋地管道动力响应试验及数值模拟研究  

Study on dynamic response test and numerical simulation of buried pipelines under blast load

作　　者：樊玉光[1] 方军 崔莹[1] 党文波 王嘉乐 FAN Yuguang;FANG Jun;CUI Ying;DANG Wenbo;WANG Jiale(Mechanical Engineering College,Xi’an Shiyou University,Xi’an 710065,Shaanxi)

机构地区：[1]西安石油大学机械工程学院,陕西西安710065

出　　处：《长江大学学报（自然科学版）》2023年第1期119-126,共8页Journal of Yangtze University(Natural Science Edition)

基　　金：陕西省自然科学基础研究计划面上项目“近场爆炸下POZD增强碳纤维加固含缺陷埋地油气管道损伤评估及抗爆优化研究”(2023-JC-YB-296);陕西省教育厅重点科研计划项目(新型智库项目)“天然气集输管道风险定量评估及管理机制研究”(22JT035)。

摘　　要：基于设计开展油气管道浅埋爆炸试验与数值模拟,对油气管道在爆炸荷载下动力响应及CFRP(carbon fiber reinforced polymer)对防护效果进行研究。通过比对油气管道浅埋爆炸试验数据,验证了采用ALE(arbitraryLagrange-Euler)方法建立管-土耦合模型的合理性和有效性。研究结果表明,在爆炸荷载下,管道迎爆面发生凹陷变形,高应力区出现在正对爆心单元并向管道端部逐步延伸衰减。外部包裹CFRP可以有效减缓管道变形,且一定程度上增加CFRP层数可以有效降低管道等效应变,10层CFRP包裹加固的管道等效应变较6层CFRP包裹加固管道的等效应变降低56.4%。同时,在炸药量小于5kg时,浅埋爆炸荷载条件下埋地油气管道的变形不明显,爆心距大于0.6m时,管道最大有效应力衰减较快。Based on the design of oil and gas pipeline shallow buried explosion test and numerical simulation, the dynamic response of oil and gas pipelines under blast load and the protection effect of CFRP(carbon fiber reinforced polymer) were investigated.By comparing the data from the shallow buried explosion tests of oil and gas pipelines, the rationality and effectiveness of the ALE(arbitrary Lagrange-Euler) method for establishing the coupled pipe-soil model was verified.The results of the study show that under the blast load, the blast-face of the pipeline undergoes depression and deformation, and the high stress zone appears in the unit directly opposite to the blast centre and gradually extends and decays towards the end of the pipeline.Externally wrapped CFRP can effectively reduce the deformation of the pipe, and to a certain extent increasing the number of CFRP layers can effectively reduce the equivalent effect of the pipe, and the equivalent effect of 10 layers of CFRP wrapped reinforced pipe is 56.4% lower than the equivalent effect of 6 layers of CFRP wrapped reinforced pipe. At the same time, the deformation of buried oil and gas pipelines under shallow buried blast load conditions is not obvious when the explosive charge is less than 5kg, and the maximum effective stress of the pipeline decays faster when the blast center distance is greater than 0.6m.

关 键 词：浅埋爆炸 CFRP ALE 数值模拟 油气管道 

分 类 号：O382.2[理学—流体力学]