近爆条件下高强钢板的抗爆性能与几何参数影响规律研究
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中图分类号：0383 国标学科代码：13035 文献标志码：A
Abstract：High-strength steel has excelent mechanical properties，which has beenutilized in the fields of explosion and impact. In order to study the blast resistance of high-strength steel plates，ANSYS/LS-DYNA software was first used to simulatethe impact testonhigh-strength stelmaterials.Bycomparing with experimentalresults，the Johnson-Cook model parameters characterizing the dynamic constitutive behavior of high-strength steel are determined. Based on the above model parameters，theexplosion simulation of high-strength stel plates under near-field explosions is furthercarriedout.The interaction processbetweentheexplosionsockwaveandthesteelplateissystematicallanalyzed，andthesizeefectsofthe stelplateonitsdeformationcharacteristicsandfiluremodeareexplained.Theresultsshowthat theJohnson-Cookmodelcan ffectivelysimulatethe mechanicalbehaviorofS690hgh-strengthstelathighstrainrates.High-strength steelplates havea weakening effect on the propagationofshock waves.Withthe increase ofstel plate thickness，the propagationrange of shock wavethrough steel plate decreases gradually.For high-strength stelplatesof diferent geometric dimensions，near-field explosions willcause three damage modes：petal-saped fracture，smallfractureand largedeformation.It is foundthatthe thicknesisthedecisivefactortodeterminethefailuremodeofsteelplatesundernear-fieldexplosions.Forhigh-strengthsteel plates with largedeformation，theincreaseof thicknessand decrease ofwidth willimprove theabilityofresistancetonear-field explosios.Inadition，thereisapositivecorelationbetweentheabilityofshockresistanceofthehig-strength steelplateand the width-thicknessratio.When the proportional distanceisO.13，a modelcanbe provided to predictthe maximum displacementrangeofthehigh-strengthsteeplateaccording tothesteelplatesize.Theaboveconclusionscanprovidesome guiding significance for the optimal design and engineering application of high-strength steel structures.
Keywords： high strength steel plate； Johnson-Cook model； short-range explosion load； geometrical parameter
在现代工程结构设计中，钢板作为一种关键的防护和承载部件，在桥梁、建筑、军事防御以及海洋平台等众多领域发挥着至关重要的作用[1-3]。（剩余16640字）