Research Progress on the Electrostatic Hazard of Explosives
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摘要:火炸药在生产与储运过程中存在显著的静电危险性,针对这一问题的研究对确保火工品的安全生产至关重要。综述了近年来关于火炸药静电性能试验和静电危险性仿真的国内外研究进展。首先,分析了静电火花感度和静电积累特性的测试原理以及环境温度、湿度、测试条件和药剂粒径等因素对静电火花感度和静电积累特性的影响规律。然后,总结了火炸药在筒仓内静电场强分布的变化规律和药剂颗粒的荷电特性,并对有限元法(FEM)和离散元法(DEM)2种仿真方法的适用性和局限性进行了对比分析。最后,总结了当前研究存在的不足,并指出了未来的研究方向:统一火炸药静电特性测试标准,建立火炸药静电特性数据库;构建涵盖分子、颗粒与设备的多尺度仿真体系;在此基础上,构建覆盖“人-机-环”全过程的静电安全防护体系,以期为火炸药的安全生产和使用提供可靠保障。
Abstract:There is a significant electrostatic hazard in the production, storage and transportation of explosives, and research on this issue is crucial to ensure the safe production of explosives. The recent research progress on the electrostatic performance test and electrostatic hazard simulation of explosives at home and abroad was reviewed. First, the test principles of electrostatic spark sensitivity and electrostatic accumulation characteristics were analyzed, as well as the influence of factors such as environmental temperature, humidity, test conditions, and agent particle size on electrostatic spark sensitivity and electrostatic accumulation characteristics. Then, the variation law of the electrostatic field intensity distribution of explosives in silos and the charge characteristics of agent particles were summarized, and the applicability and limitations of two simulation methods, finite element method (FEM) and discrete element method (DEM), were compared and analyzed. Finally, the shortcomings of current research were summarized, and future research directions were pointed out: Unifying the test standards for the electrostatic characteristics of explosives, establishing an electrostatic characteristics database for explosives; Building a multi-scale simulation system covering molecules, particles and equipments; On this basis, building an electrostatic safety protection system covering the entire process of "man-machine-environment", in order to provide reliable guarantee for the safe production and use of explosives.
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