Analysis of Induced Current and Electromagnetic Safety of Bridge-Wire Electric Explosive Device

Abstract

Based on the basic theory of electromagnetic fields, the formation of the equivalent antenna of an electric explosive device(EED) and its energy conversion process were analyzed, and CST software was used to simulate and model the formation of induced current in the EED under the action of strong electromagnetic pulses. After validating the model, the influence of factors such as incident wave signal, lead wire layout, and bridge-wire resistance on the induced current was studied. According to the results, the strength, frequency, and the direction of incident wave, as well as the inductive receiving area of the equivalent antenna of the EED were major factors determining induced current. Bridge-wire resistance and induced current jointly determine the induced energy coupled to the EED. From the perspective of electromagnetic safety, the duration of continuous electromagnetic pulse action on EED shall not exceed 178 μs. The research content has certain reference significance for the safety protection of EEDs in weapon systems.

Keywords

• electric explosive device
• bridge-wire resistance
• equivalent antenna
• electromagnetic pulse
• safety protection