直流激励下桥丝型电火工品电弧发火预测模型  

A Prediction Model of Arc Ignition for Bridge Wire Electro Explosive Device Under Direct Current Excitation

作　　者：张博渊 梁涛[1,2] 薛婉婷 王哲[1,2] 穆亚茹[1,2] 谢彦召 ZHANG Bo-yuan;LIANG Tao;XUE Wan-ting;WANG Zhe;MU Ya-ru;XIE Yan-zhao(State Key Laboratory of Electrical Insulation and Power Equipment,Xi′an Jiaotong University,Xi′an 710049,China;School of Electrical Engineering,Xi′an Jiaotong University,Xi′an 710049,China)

机构地区：[1]西安交通大学电工材料电气绝缘全国重点实验室,陕西西安710049 [2]西安交通大学电气工程学院,陕西西安710049

出　　处：《含能材料》2024年第12期1334-1342,共9页Chinese Journal of Energetic Materials

基　　金：国家自然科学基金项目(52207015)。

摘　　要：为了研究桥丝型电火工品在直流激励下的电弧发火特性,预测其电弧发火安全阈值,采用模拟电荷法计算了脚‐壳二维切面电场强度,利用电击穿理论计算了脚‐壳电击穿系数,提出了桥丝型电火工品电弧发火的量化判据并建立模型。结果表明,环境温度在25°左右,气压为大气压强时,桥丝型电火工品脚‐壳之间距离对其电弧发火阈值影响较大,脚‐壳距离越短,电弧发火阈值越低。桥丝型电火工品脚‐壳间电击穿电压预测模型计算结果与实测值相对误差不超过3.3%,且利用COMSOL仿真计算所得电击穿系数与预测模型计算结果相对误差约1%。To investigate the arc ignition characteristics of bridge wire electro-explosive devices(EEDs)under DC excitation and predict the arc ignition safety threshold,the simulated charge method was exploited to calculate the cross-sectional electric field strength between the foot-wire and shell of bridge wire EEDs,following a scaled experiment for EEDs to solve unknowns in the electrical breakdown model,which is the electrical breakdown coefficient between the foot-wire and shell of EEDs,leading to a quantitative criterion and arc ignition prediction model.Results indicate that when the laboratory temperature is around 25°and the air pressure is atmospheric pressure,the distance between the foot-wire and shell of bridge wire EEDs significantly influences the arc ignition threshold,and the shorter the foot-shell distance is,the lower the arc ignition threshold is.The relative error between the measured breakdown voltage and the calculated results from the predictive model does not exceed 3.3%.Furthermore,the relative error between the foot-shell breakdown coefficient simulated in COMSOL and the calculated results from the predictive model is within 1%,verifying the model's accuracy.This research provides a reliable tool for predicting arc ignition safety thresholds,potentially enhancing the design and safety of EEDs.

关 键 词：桥丝型电火工品 模拟电荷法 预测模型 电弧发火 缩比实验 脚‐壳距离 

分 类 号：TJ5[兵器科学与技术—军事化学与烟火技术] TJ45