Thermodynamic calculation is the theoretical basis for the study of initiation and detonation,as well as the prerequisite for forecasting the detonation performance of unknown explosives.Based on the VLWR(Virial-Wu)thermodynamic code,this paper introduced the universal solid equation of state(EOS)VINET.In order to truly reflect the compressibility of nanocarbon under the extremely high-temperature and high-pressure environment in detonation,an SVM(support vector machine)was utilized to optimize the input parameters of carbon.The detonation performance of several explosives with different den-sities was calculated by the optimized universal EOS,and the results show that the thermodynamic code coupled with the universal solid EOS VINET can predict the detonation performance parameters of ex-plosives well.To investigate the application of the thermodynamic code with the improved VINET EOS in the working capacity of explosives,the interrelationship between pressure P-particle velocity u and pressure P-volume V were computed for the detonation products of TNT and HMX-based PBX(HMX:binder:insensitive agent=95:4.3:0.7)in the CJ isentropic state.A universal curve proposed by Cooper was used to compared the computed isentropic state,where the ratio of pressure to CJ state were plotted against the ratio of velocity to CJ state.The parameters of the JWL(Jones-Wilkins-Lee)EOS for detonation products were obtained by fitting the P-V curve.The cylinder tests of TNT and HMX-based PBX were numerically simulated using the LS-DYNA,it is verified that,within a certain range,the improved al-gorithm has superiority in describing the working capacity of explosives.

Qin Liu;Ying-liang Duan;Wei Cao;Hong-hao Ma;Xin-ping Long;Yong Han

Institute of Chemical Materials,China Academy of Engineering Physics,Youxian District,621000,Mianyang City,Sichuan Province,China;CAS Key Laboratory of Mechanical Behavior and Design of Materials,Department of Modern Mechanics,School of Engineering Science,University of Science and Technology of China,Hefei,Anhui,230026,PR China;Key Laboratory of Fire Science,University of Science and Technology of China,Hefei,Anhui,230026,PR China;China Academy of Engineering Physics,Youxian District,621000,Mianyang City,Sichuan Province,China

防务技术

[1]Qin Liu;Ying-liang Duan;Wei Cao;Hong-hao Ma;Xin-ping Long;Yong Han-.Calculating detonation performance of explosives by VLWR thermodynamics code introduced with universal VINET equation of state)[J].防务技术,2022(06):1041-1051

VLWR,VINET,plosives

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