第2卷第1期Vol.2No.12023年2月JournalofArmyEngineeringUniversityofPLAFeb.2023爆炸作用下土中竖井结构荷载分布规律孙善政,卢浩,陈昊,王德荣(陆军工程大学国防工程学院,江苏南京210007)摘要:为研究爆炸作用下非饱和黏土中竖井上荷载分布规律,开展了8组土中竖井受侧向爆炸作用模型试验及24组数值模拟计算。通过对比数值模拟与试验结果,验证了数值模拟计算合理性。根据试验及数值模拟计算结果,分析了竖井上荷载的时空分布规律,提出了能够合理描述荷载轴向、环向空间分布的预测公式。结果表明:(1)荷载轴向上是钟形分布,并且随着装药距离的增加分布越发均匀,且可以认为荷载在一定轴向范围内是同时达到的;(2)荷载环向呈现明显的时空不均匀性,侧压系数和背压系数都随着装药距离与结构直径比值的增大而增大;(3)分别采用修正的正态分布曲线和三角函数曲线描述荷载的轴向和环向分布是合理的。预测公式可以用于竖井结构抗爆分析。关键词:爆炸荷载;荷载分布;竖井结构;圆柱壳中图分类号:TU92DOI:10.12018/j.issn.2097-0730.20220505002DistributionofExplosionLoadonSiloStructureinSoilSUNShanzheng,LUHao,CHENHao,WANGDerong(CollegeofNationalDefenseEngineering,ArmyEngineeringUniversityofPLA,Nanjing210007,China)Abstract:Inordertostudytheloaddistributionofsilosinunsaturatedclayundertheinfluenceofex-plosion,8groupsofmodeltestand24groupsofnumericalsimulationcalculationofthesilostructuresinsoildamagedbythelateralexplosionswereconducted.Therationalityofthenumericalsimulationwasverifiedbycomparingthenumericalsimulationsandexperimentalresults.Thespatialandtemporaldistri-butionofexplosionloadonthesilostructuresinsoilwasanalyzedbasedontheexperimentalandnumericalsimulationresults.Thepredictionformulasthatcanreasonablydescribetheaxialandcircumferentialdis-tributionoftheexplosionloadwereproposed.Thefollowingconclusionscanbedrawn.First,intheaxialdirection,theexplosionloadonthesilostructurepresentsabell-shapeddistribution;theloaddistributionbecomesmoreevenwiththeincreaseofthechargedistance;inacertainaxialrange,itcanbeassumedthattheexplosionloadreachesthesilostructuresimultaneously.Second,thecircumferentialdistributionofexplosionloadonthesilostructureshowsanobviousspatialan...
