Simulation and Regression Analysis of Electrostatic Characteristics of Pyrotechnic Agents Based on EDEM
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摘要:针对火工药剂转运过程中因摩擦而产生静电积累这一安全隐患，以典型火工药剂太安（PETN）为研究对象，基于EDEM离散元仿真分析了滑槽长度、滑槽角度、滑槽与药剂动摩擦因数及药剂粒度4个单因素对药剂静电积累量的影响规律；在此基础上，设计了四因素三水平的正交试验，明确了各因素影响的主次顺序；并基于Design-Expert软件对试验结果进行回归分析，建立了静电积累量与四因素间的二次回归方程，通过响应面分析揭示了关键交互项的显著影响。结果表明：PETN的静电积累量随滑槽长度、滑槽与药剂动摩擦因数的增加近似呈线性增长，而随滑槽角度与药剂粒度的增大则呈减小趋势；四因素对静电积累量影响的主次顺序依次为：滑槽角度＞滑槽长度＞药剂粒度＞滑槽与药剂动摩擦因数；滑槽角度与滑槽长度之间的交互作用对静电积累量的影响程度，大于滑槽角度与滑槽药剂动摩擦因数之间的交互作用。
Abstract:In response to the safety hazard of static electricity accumulation caused by friction during the transportation of pyrotechnic agents, a typical pyrotechnic agent, Tai’an PETN), was taken as the research object. Based on EDEM discrete element simulation, the influence lawsof four single factors, namely chute length, chute angle, dynamic friction coefficient between the chute and the agent, and agent particle size, on the electrostatic accumulation of the agent were analyzed; On this basis, a four-factor three-level orthogonal test was designed to clarify the order of influence of each factor; And based on the Design-Expert software, regression analysis was conducted on the test results, establishing a quadratic regression equation between static electricity accumulation and the four factors. The significant influence of key interaction terms was revealed through response surface analysis. The results show that the static electricity accumulation of PETN increases approximately linearly with the increase in chute length and the dynamic friction coefficient between the chute and the agent, while it shows a decreasing trend with the increase in chute angle and agent particle size; The order of the four factors on static electricity accumulation is as follows: chute angle > chute length > agent particle size > dynamic friction coefficient between the chute and the agent; The interaction between chute angle and chute length has a greater impact on static electricity accumulation than the interaction between chute angle and the dynamic friction coefficient between the chute and the agent.
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