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Experimental Research on the Sound Level Changes Generated by Potassium Nitrate in Second Bang Powder of Double-Bang Firecracker

Author: DingHuiZhe
Tutor: WangHaiLiang
School: Shandong University of Science and Technology
Course: Safety Technology and Engineering
Keywords: Fireworks Formula Oxygen balance Sound level Optimization Model
CLC: TQ567
Type: Master's thesis
Year: 2008
Downloads: 14
Quote: 0
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Abstract


In this paper, experimental methods , quantitative study of the law of the double-bang the Baoxiang drug reaction sound level varies with the component change in the quality of its mixture of potassium perchlorate . 15 recipe in the the Baoxiang the drug component of potassium nitrate , aluminum powder, magnesium alloy powder and sulfur quality unchanged premise , by changing more sensitive to the quality of the potassium perchlorate discharge effect . Experimental MP302 dual-channel acoustic analysis to measure the value of the sound level and spectrum of different formulations . On the basis of experimental data , not only the quantitative study of the relationship of explosive powder sound level with the oxygen balance , also studied the spectral characteristics of the sound of different formulations Baoxiang drug . Experimental results show that the discharge performance requirements of the explosive powder formulations of the mass fraction of the potassium perchlorate , can reach in within the range of 30.30 to 74.16% . And this corresponds to the oxygen balance of the explosive powder -0.108g · gq -1 ~ 0.247g · g -1 between . The explosive powder voice frequency distribution between 100 ~ 20000Hz , within the hearing range of the human ear . And the spectral distribution of the noise frequency distribution characteristics typical . The known of each formulation discharge effect on the calculation of the dispersion coefficient in the different samples of the same recipe , stability . Experiment to determine the explosive powder formulations based on the scope of the lowest cost for the target , the upper and lower limits for the fraction of the quality of each component constraints , explosive powder formulations optimized mathematical model . The optimal formulations MATLAB6.5 solving potassium perchlorate , potassium nitrate , aluminum powder , magnesium alloy powder and sulfur mass fraction of 30% , 30% , 12% , 16% and 12% , respectively . Fireworks adjustment formula mathematical optimization method , the initial attempt . The innovation of this paper is mainly manifested in: the quantitative study of the variation of the Push- explosive powder discharge after sound level balance with a mixture of oxygen , measured spectrum distribution characteristics of the sound in the discharge of explosive powder . As of this time of finalizing reports similar to these two innovations not yet retrieved .

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CLC: > Industrial Technology > Chemical Industry > Explosives industry, match industry > The Pyrotechnics surgery,fireworks,firecrackers
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