基于SPH-FEM方法的土中浅埋爆炸成坑效应研究  

Study on the effect of shallow burial explosions into cratersin soil based on SPH-FEM method

作　　者：崔莹[1,2] 赵梦婷 李章剑 方军 赵奔 CUI Ying;ZHAO Mengting;LI Zhangjian;FANG Jun;ZHAO Ben(School of Civil Engineering,Xi’an Shiyou University,Xi’an 710065,Shaanxi;Shaanxi Key Laboratory of Well Stability and Fluid&Rock Mechanics in Oil and Gas Reservoirs,Xi’an 710065,Shaanxi;Mechanical Engineering College,Xi’an Shiyou University,Xi’an 710065,Shaanxi;School of Civil Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,Shaanxi)

机构地区：[1]西安石油大学土木工程学院,陕西西安710065 [2]陕西省油气井及储层渗流与岩石力学重点实验室,陕西西安710065 [3]西安石油大学机械工程学院,陕西西安710065 [4]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《长江大学学报（自然科学版）》2023年第6期134-140,共7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);陕西省教育厅科学研究计划(能源项目管理与创新战略智库)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：通过设计开展静爆实验,对土中浅埋爆炸成坑效应及影响因素进行研究。基于所获取的静爆试验数据,建立SPH-FEM数值模型,对土中浅埋爆炸过程及爆坑参数进行分析,验证SPH-FEM方法模拟土中浅埋爆炸的有效性。进一步通过数值计算对比,讨论了SPH-FEM方法与ALE方法在土中爆炸数值模拟过程中的异同、爆坑半径与炸药埋设深度的关系以及炸药量与爆坑体积的关系,并通过数学拟合得到了9.35 kg TNT条件下,炸药埋设深度与爆坑半径的经验曲线公式。研究表明:SPH-FEM方法较ALE方法模拟土中浅埋爆炸更加精细且计算效率更高。所建立的炸药埋设深度与爆坑半径的经验曲线公式可以有效预测浅埋爆炸的爆坑半径,且随着炸药埋设深度的增加,爆坑半径将先随之增大到峰值,之后爆坑半径将会随炸药埋设深度的增加而迅速减小。By the design of static explosion experiments,the effects and influencing factors of shallow burial explosions into craters in soil were studied.Based on the static explosion test data obtained,the numerical analysis model of SPH-FEM was established,and the explosion process and crater parameters in shallow buried soil were also analyzed to verify the effectiveness of SPH-FEM method in simulating shallow buried explosions in soil.Furthermore,the similarities and differences between the SPH-FEM method and the ALE method in the process of numerical simulation of explosions in soil,the relationship between the radius of the blasting pit and the buried depth of the explosives,and the relationship between the amount of explosives and the volume of the blasting pit were discussed by numerical calculation and comparison.And the empirical curve formula of the buried depth of the explosives and the radius of the crater under the condition of 9.35 kg TNT was obtained by mathematical fitting.The results show that the SPH-FEM method was more refined and more computationally efficient than the ALE method to simulate shallow burial explosions in soil.The established empirical curve formula of the depth of explosive burial and the radius of the pit can effectively predict the radius of the pit of the shallow burial explosion.With the increase of the depth of the explosive burial,the radius of the pit increased to the peak firstly,and then decreased rapidly with the increase of the buried depth of the explosives.

关 键 词：浅埋爆炸 静爆试验 SPH-FEM 数值模拟 爆坑参数 

分 类 号：O382.2[理学—流体力学]