Calculation method for quasi-static pressure of annular composite implosion of active materials and explosives
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摘要: 炸药内爆后燃效应会释放更多能量,使准静态压力增大。为了预测密闭环境活性材料与炸药环状复合后内爆准静态压力,首先归纳了已有碳氢氧氮炸药考虑后燃效应内爆准静态压力计算模型,在此基础上提出了一种适用于活性材料与炸药环状复合的准静态压力计算模型,然后进行活性材料与炸药复合装药、含铝炸药的内爆试验,利用试验获得的数据对模型精度进行验证,最后对比分析两种炸药内爆准静态压力试验结果,将计算模型推广至一般含铝炸药,并利用文献数据验证。研究结果表明所建立的复合炸药考虑后燃准静态压力修正模型与试验数据、文献数据吻合较好,平均误差为9.2%,最大误差16.0%;对一般含铝炸药的计算结果平均误差为12.1%,最大误差20.6%。研究成果可为炸药内爆准静态压力预测提供理论支持。
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关键词:
Abstract: The post ignition effect of explosives will release more energy by reacting with air, resulting in an increase in quasi-static pressure. In order to predict the quasi-static pressure of internal explosion in a closed environment composed of aluminum containing active materials and explosive rings, this paper proposes an optimization method for the quasi-static pressure calculation model applicable to the internal explosion of aluminum containing composite charges, based on summarizing the existing quasi-static pressure calculation models of hydrogen, oxygen, and nitrogen explosives that consider the post ignition effect. Then, active materials and explosives composite charges and aluminum containing explosives internal explosion tests are carried out, and the experimental data are compared and analyzed with the quasi-static pressure results calculated by the established optimization model. At the same time, the internal explosion results of the two types of explosives are compared, and the calculation model is extended to general aluminum containing explosives and the accuracy is verified. The research results indicate that the established quasi-static pressure correction model for post combustion of composite explosives is in good agreement with experimental and literature data, with an average error of 10.2% and a maximum error of 16.0%; The average error of the calculation results for general aluminum containing explosives is 12.1%, with a maximum error-
Key words:
- Implosion /
- Quasi static pressure /
- Post combustion effect /
- Active materials /
- Composite charge
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