凸型加筋锥柱结合壳深水爆炸失稳特性研究龙仁荣，廖晨，张庆明，汪海洋，刘博文（北京理工大学爆炸科学与技术国家重点实验室，北京100081）摘要：为研究凸型加筋锥柱结合壳结构在深水爆炸载荷作用下的动力学响应以及在此过程中伴随的失稳特性，采用ABAQUS有限元软件中的声固耦合算法开展了300～500m水深条件下深水爆炸数值模拟研究，基于结构挠度变化的失稳判据，分析总结了加筋锥柱结合壳的失稳模式，获得了加筋锥柱结合壳临界失稳载荷和临界失稳挠度随水深和壳体结构参数的变化规律.结果表明，水深条件、壳体半径、壳体厚度以及结构锥角对结构稳定性有较大影响，而腹板厚度对结构的稳定性影响不大.在此基础上，运用量纲分析的方法结合模拟得到的临界失稳数据建立了结构在常见失稳模式下结构临界失稳判据的计算公式.关键词：加筋锥柱结合壳；深水爆炸；失稳特性中图分类号：O383文献标志码：A文章编号：1001-0645(2023)03-0240-12DOI：10.15918/j.tbit1001-0645.2022.069InstabilityStudyonDeep-Underwater-ExplosionofConvexRing-StiffenedCone-CylinderCombinedShellLONGRenrong，LIAOChen，ZHANGQingming，WANGHaiyang，LIUBowen（StateKeyLaboratoryofExplosionScienceandTechnology,BeijingInstituteofTechnology,Beijing100081,China）Abstract：Thedynamicresponseprocessandtheinstabilityofconvexring-stiffenedcone-cylindercombinedshellwiththedeep-waterexplosionloadintherangeof300～500mdepthwasobtainedbyABAQUSnumeric-alsimulationmethod.Basedonthestabilitycriterionofthestructuraldeflectionchange,thecriticalinstabilityloadanddeflectionofthecone-cylindercombinedshellunderdifferentparameterconditionswassummarizedandthefactorsaffectingthestabilityofring-stiffenedcone-cylindercombinedshellwereevaluated.Theresultsshowthattherearethreedifferentinstabilitymodewithdifferentstructuredimensionparameters,andthewaterdepthconditions,theshellradius,theshellthickness,andtheconeangleofthering-stiffenedcone-cylindercom-binedshellhaveagreatinfluenceonstructuralstability,whilethethicknessoftheribshaslittleeffectonthestructurestability.Finally,acalculationformulaforstructuralcriticalinstabilityincommoninstabilitymodeisestablishedbydimensionalanalysis.Keywords：ring-stiffenedco...
