电击武器空气间隙放电仿真研究

Simulation Study on Air Gap Discharge of Electric Shock Weapon

研究非致命装置电击武器对人体放电优化设计问题,由于高压低电流、放电时间短等特性,准确获得全过程的放电参数较难实现。为解决上述问题,采用尖—板电极来仿真电击武器对人体的放电过程,建立尖—板电极放电的二维模型,采用有限元弱解式求解,并确定模型参数、初始条件和边界条件,在COMSOL Multiphysics中进行仿真。结果表明,电子和正离子都是先缓慢增加,而后雪崩式地增加,但正离子浓度的峰值点总是落后于电子浓度的峰值点,流注通道形成后,二者都骤然减少;流注通道形成前,电场发生畸变,之后则比较平稳。仿真结果证明,可为研制电击武器提供了重要参考。

Research the influencing factors of the electric shock weapon discharging on human body. It is hard to gain the influencing parameters of the discharging process exactly because of its features such as, hige voltage, low current and quick discharge. So, the point-plank electrodes are used to imitate the process. The authors established a two-dimensional discharging model of the point-plank, and set up the number imitation model of the discharging process of the electric shock weapon, adopted weak solution form of finite element to solve the number model, made sure the parameter, initial conditions and boundary conditions of the model, and carried on solving in COMSOL Mul- tiphysics. The imitation result indicates ： the density of electron and positive ion increases slowly at first, then increa- ses like snowslide, but the density peak value of positive ion is always behind that of electron; when the stream chan- nel forms, both decrease abruptly; before the stream channel forms, electric field changes abnormally, then changes steady. From the imitation of the outcome, it was found that the permittivity of dielectric and change of electric field are main factors that influence discharge, which provides some reference for the research of electric shock weapon.