基于水下爆炸的爆轰产物JWL状态方程确定方法研究

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中图分类号：0381 国标学科代码：13035 文献标志码：A

Determination of JWL equation of state based on the detonation product from underwater explosion

JIAO Junjie， SHAN Feng， WANG Hancheng， QI Yanjie， PAN Xuchao， FANG Zhong， CHENG Yubo， HE Xiaolan， CI Shengjie， HE Yong （MechanicalEngineeringCollge，NanjingUniversityofienceandTechologynjing4，Jangsuina）

Abstract：The equationofstate for thedetonationproducts ofexplosives isoneofthe foundations in explosion physics.JWL equation ofstate has been widelyappliedto study theproperties ofvarious explosives.In ordertoobtaintheequationofstate of the detonation products，anunderwater explosion method was used to studyJWLequationof state for the detonationof RDX. It considered the explosion bubble expansion process based on the conservation of energy including Es0 （initial shock wave energy）， Ept （potential energy of water）， Ec （kinetic energy of water） and Er （energy loss by bubble expansion）， which are related to the underwater explosion bubble radius （R-t） and shock wave front （Rs-t） measured in the underwater explosion experiments as functions of time.Based on the experimental results and using the same method to process the experimental dataincylinder experiment，tetimefunctions ofexplosionbubbleexpansionradius and variationofshock wave frontposition were fitted andthe parametersof theJWLequationofstate forRDX detonation products were obtained.Inorder to analyze the accuracy ofthe parametersof the JWLequationof stateobtained bythe underwater explosion method，thetime historyof the underwater explosions bubble pulsating pressure wave was calculated using the bubble dynamics equation.It shows that the calculation results agreewellwith the bubble expansion radius and bubble pulsation period determined using the underwater explosionexperiments in a pool.Thecalculated bubble radiusobtained bythe proposed measurement method has a smaller deviation from that obtained bythe cylinder experimental value，especiallin the low-presure stagecompare with the JWL state parameters obtained from cylinder method.Thismethod provides a testing approach for the equationof stateof letonation products with low cost， reduced size limitations and a wide pressure range.

Keywords： underwater explosion; JWL equation of state; bubble expansion; shock wave

爆轰产物状态方程是研究炸药性能的重要方法之一[1]。（剩余11588字）