近爆條件下高強(qiáng)鋼板的抗爆性能與幾何參數(shù)影響規(guī)律研究

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中圖分類號(hào)：0383 國標(biāo)學(xué)科代碼：13035 文獻(xiàn)標(biāo)志碼：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

在現(xiàn)代工程結(jié)構(gòu)設(shè)計(jì)中，鋼板作為一種關(guān)鍵的防護(hù)和承載部件，在橋梁、建筑、軍事防御以及海洋平臺(tái)等眾多領(lǐng)域發(fā)揮著至關(guān)重要的作用[1-3]。（剩余16640字）