Abstract
This paper established the mathematical model of bridge wire temperature rise under direct current condition and gave the solution. It computed bridge wire temperature by using the thermal-electric coupling method provided by ANSYS-Workbench finite element analysis software. In the end, the temperature bridge wire applied to different electric current was measured by the infrared thermal imaging temperature measurement method. The result shows that the ANSYS simulation results are in agreement with the theoretical calculation and the experimental results. It is feasible to compute bridge wire temperature of initiator by using ANSYS-Workbench software, and it is an important method to analyze complex structure of pyrotechnics.
Highlights
Electric explosive devices are widely used in aerospace, weapons and equipment [1] civil blasting and other fields because of their short reaction time and high reliability, safety, stable performance [2]
It computed bridge wire temperature by using the thermal-electric coupling method provided by ANSYS-Workbench finite element analysis software
Simulation calculation and temperature test of the bridge, the following conclusions can be drawn: (1) Due to the cooling effect, when the current input, the temperature of the middle part is higher than both ends of the bridge
Summary
Electric explosive devices (hereinafter short for EED) are widely used in aerospace, weapons and equipment [1] civil blasting and other fields because of their short reaction time and high reliability, safety, stable performance [2]. The heat transfer model doesn’t just suit all of the bridge wire EED. Because of the complicated heat transfer among the bridge and the power, the bridge and the ceramic, the temperature rise mathematical model of electric bridge is difficult to establish. There have been many domestic and international scholars studied the bridge temperature rise of bridge type EED using simulation software, such as Wang Dao-you et al [6], Xu Yi-gen et al [7], Wang Pei-lan et al [8] and G. Peevy et al [9] These scholars have proved that the simulation method can be used to study the temperature rise of bridge wire. The initiator reliability depends on the match of energy and heat dissipation design of the ignition unit, which is mainly formed by the bridge, ceramic and power. The Bridge temperature rise research carried out is of great significance to improve the ignition reliability of electrical initiator
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