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摘要: 根据P.K.Tang等提出的对炸药爆轰产物超压状态方程建模时只对JWL状态方程CJ等熵线中 高压指数项做修正的研究思路,首先给定超压状态下内能等熵线的修正项,再根据热力学定律对内能等熵线 求微分而得到沿压力等熵线的修正项。对JB-9014炸药超压爆轰冲击Hugoniot实验数据和声速实验数据同 时进行拟合,得到了3个JWL状态方程在超压爆轰状态下的修正项,并进行了分析与比较。得到超压修正项 的方法简单,3组超压修正项与P.K.Tang的修正项一样,都能很好地拟合超压Hugoniot数据。在实验数据 范围外,对超压状态下的声速-压力实验数据的拟合精度有所差别。Abstract: BasedonPKTangsopinionthatonlythehigh-pressuretermofJones-Wilkins-Leeequationofstate( JWLEOS)neededtobemodifiedwhenusedforoverdrivendetonation,themodified termoftheinternalenergyisentropiccurvewaspresentedandthemodifiedtermofthepressureisentropiccurvewasobtainedfromthedifferential ormoftheinternalenergyisentropiccurvebyapplying thefirstlawofthermodynamics.AndthreemodifiedJWLequationsofstateforoverdrivendetonation productsofJB-9014explosiveweregainedbyfittingsimultaneouslytheshockHugoniotpressureand soundvelocitydata.Resultsshowthat,themodifiedtermsgainedinthispapercanmodelHugoniot dataforoverdrivendetonationreasonablyaswellasPKTangs,andtheprecisionisalittleworseout oftherangeofexperimentaldata
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Key words:
- mechanicsofexplosion /
- equationofstate /
- overdrivendetonation /
- explosive
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