In view of the problems of the classical measurement method of constant temperature explosion heat, such as long measurement time, system failure and so on, a solution of identifying explosion heat based on prefault data was proposed. Initially, the heat transfer equation of calorimeter based on the hypothesis of explosive transient response was established, and the change rule of water temperature in inner barrel was obtained after solving. Based on the thought of system identification, the system identification method was obtained, which firstly identifies the indirect parameters of kNW/(cNmN), u1, λ1, λ2, secondly identifies the target parameters of TE(τM), kNZ/cNmN, kNZ/cZmZ, thirdly identifies the correctional raising temperature and explosion heat. The error analysis shows that the identification value of explosion heat can converge to the classical value steadily, and the influence of non transient reaction such as oxidation and combustion on the identification accuracy can be ignored. Ultimately, 8 kinds of typical explosive samples were simulated and analyzed, and the criterion of convergence time was proposed. The simulation results show that the identification value of detonation heat can converge to the classical value quickly and reliably under the condition of less than 3% relative error and 1/2 of the main and final stage. The test criterion can judge the convergence time of the identification value of detonation heat reliably and effectively reduce the risk of measurement failure caused by system fault.
Key words
physical chemistry /
explosion heat /
isothermal calorimeter /
data before malfunction /
steady identification
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References
[1] 王晓峰,冯晓军,肖奇.温压炸药爆炸能量的测量方法[J].火炸药学报,2013,36(2):9-12.
WANG Xiao-feng, FENG Xiao-jun, XIAO Qi. Method for measuring energy of explosion of thermo baric explosives[J]. Chinese Journal of Explosives & Propellants(Huozhayao Xuebao), 2013,36(4):9-12.
[2]国防科学技术工业委员会. GJB 772.303-90炸药试验方法-爆热测定[S]. 1990.
[3]曹威,何中其,陈网桦,等.水下爆炸法测量含铝炸药后燃效应[J].含能材料, 2012, 20(2): 229-233.
CAO Wei, HE Zhong-qi, CHEN Wang-hua. Measurement of afterburning effect of aluminized explosives by underwater explosion method[J]. Chinese Journal of Energetic Materials, 2012, 20(2): 229-233.
[4]SAMUEL P H, RICARDO I. Predicting heats of explosion of nitrate esters through their NBO charges and 15N NMR chemical shifts on the nitro groups[J].Computational and Theoretical Chemistry, 2010(10):279-283.
[5]MOHAMMAD, HOSSEIN, KESHAVARZ. Quick estimation of heats of detonation of aromatic energetic compounds from structural parameters[J]. Journal of Hazardous Materials, 2006(9): 549-554.
[6]王建灵,李正来,王青枝.绝热式炸药爆热热量计绝热性能的测定方法[J]. 火炸药学报, 2007,30(2): 52 -58.
WANG Jian-ling, LI Zheng-lai, WANG Qing-zhi. Adiabatic Characteristics measurement of adiabatic explosive heat calorimeter[J]. Chinese Jourmal of Explosives & Propellants(Huozhayao Xuebao), 2007,30(2):52-58.
[7]姜炯,贾丁海.BR-1型绝热式爆热测量系统的研究[J].矿冶工程,1984,9(4):4-8.
JIANG Jiong, GU Ding-hai. Research of model BR-1 heat-insulating type explosion heat measure system[J]. Mining and Metallurgical Engineering, 1984, 9(4):4-8.
[8]卢洪义,杨兴根.固体推进剂高精度爆热测试系统设计[J].自动化与仪器仪表,1999(8):35-37.
LU Hong-yi, YANG Xing-gen. Measurement system design of high precise explosive heat to solid propellant[J]. Automation & Instrumentation, 1999(8):35-37.
[9]范荣桂.炸药爆热的恒温法测试研究[J].煤矿爆破,2001(4):9-11.
FAN Rong-gui. Study on constant temperature method of explosive heat measurement[J]. Coal Mine Blasting, 2001(4):9-11.
[10]杨世铭, 陶文铨.传热学[M]. 北京:高等教育出版社, 2006.
[11]金朋刚, 郭炜, 任松涛, 等. TNT密闭环境中能量释放特性研究[J]. 爆破器材, 2013, 43(2):10-14.
JIN Peng-gang, GUO Wei, REN Song-tao,et al. Research on TNT energy release characteristics in enclosed condition [J]. Explosive Materials, 2013, 43(2):10-14.
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