| The explosive foil detonation system has strong anti-interference ability,good controllability and low production cost.So it is indispensable in modern operations.However,with the development of science and technology,new combat forms and combat theories continue to develop,which puts forward more requirements on the performance of the traditional explosive foil detonation system.The miniaturization and multi-function of the detonation system have become a new development trend.The micro-scale explosion foil has a low ignition threshold and a small volume,which meets the development requirements of the explosion foil detonation system.Therefore,it is of great significance to carry out research on microscale explosive foils.However,it is relatively difficult to measure various data during thin-film electric explosion,so numerical simulation is an important research method.In this paper,through the discussion of the microscale effect and the physical process of the electrical explosion of the metal film,it is determined that under the action of the microscale,the resistivity of the metal film is higher,the melting point is lower and the heat capacity is larger,which will affect the electrical explosion performance of the metal film.influence.The electrical explosion test of Al films was carried out,and the volt-ampere characteristic curves of the three different material explosion foils during the electrical explosion process were obtained.The effects of material,charging voltage and the area of the detonation foil bridge area on the electrical detonation performance of the microscale detonation foil were investigated.It is concluded that under the same conditions,the Al thin film has a low detonation threshold,a high burst voltage,and an early burst time,which is suitable for a short discharge cycle initiation system.Using the data obtained from the electric explosion experiment and the improvement of Qiu Linjun’s model,a numerical simulation model of the electric explosion process of microscale explosion foil for Al is established.Numerical simulation of electric explosion was carried out on the explosion foil of these three materials using the simulation model.The simulation accuracy is more than 90%.It is proved that the simulation model established in this paper can predict the electric explosion process of microscale explosion foil.Using the simulation model,the influence of the electrical parameters of the detonating device on the electrical explosion performance of the microscale explosion foil was investigated.It is concluded that the larger the capacitance of the pulse power supply,the higher the burst voltage and burst current of the film,and the earlier the burst time;the greater the equivalent inductance of the loop,the smaller the burst voltage and burst current of the film,and the delay of the burst time;the initial resistance of the loop The larger the value,the smaller the burst voltage and the burst current of the film,and the burst time is delayed.A numerical simulation software for the electrical explosion process of microscale explosion foil is designed.The software can numerically simulate the electric explosion process of the micro-scale explosion foil,and display the volt-ampere characteristic curve of the electric explosion process on the software.After the simulation test,the software can work normally.The simulation software is easy to operate and easy to be applied in engineering practice. |
