不同速率后燃烧效应对内爆特性的影响

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中图分类号：0389 国标学科代码：13035 文献标志码：A

Abstract： A Closed-Space Model was constructed using steel plates to examine the influence of afterburning energy load generatedbyexplosivedetonation productsonthedamagecharacteristicsofconfined space.Additionall，thequasi-static pressure in theconfined space was simplified by applyingtheenergy conservation law.Relying onthe adiabatic index of the mixtureofdtonatioproductsandair，aswellasthecompleteafterbuingdegreofdetonationproducts，asimulationmethod for the afterburming efect was proposed.This method was usedtocalculate the afterbuming energyof detonation products and determine the beginning and ending timesoftheafterbuming efect.The numericalsimulationof implosiondamage ina confined space wascarried out by this method.The implosion simulation considering the afterburming energy load was performed byemploying two simulationmethods： constant reactionrateandlinearly increasingreactionrate.Theresults were compared with the implosion simulationresults without considering the afterburming effect.The influence and degreeof changeof theaferburmingefectontheimplosiondamagecharacteristicswereanalyzed.Itisfoundthattheafterbumingeffect withdifferentreactionrateshasasigniicant influenceonthedetonationdamagecharacteristics，exceptforthetemperature，in confinedspaces.Moreover，theenhancementefectoftheconstantreactionrateisthemostsignificant.Itincreasedthevelocity and acceleration loads under implosion in the confined space by 42.67% and 71.21% ，respectively. The overpressure and quasistatic pressure were increased by 74.42% and 74.95% ，respectively，and the kinetic energywas increasedby approximately 212% .The proposed simulation method forthe afterburning effect can beter simulate the dynamic responseof implosion ruin in confined spaces and provides amore accurate simulation methodof the afterburming efect for the design and evaluation of explosion-proof structures.

Keywords：afterburning effect; confined space; damage characteristics; quasi-static pressure

炸药在密闭环境引爆后，爆炸产生的冲击波载荷与爆轰产物持续燃烧构建了能量耦合作用体系，对冲击波和准静态压力产生增强效应。（剩余20973字）