通风直管道HEMP耦合响应研究

在高空核爆电磁脉冲(HEMP)条件下,通过对通风直管道半径、长度、管道端口开闭及端口增加金属网,以及是否存在排气扇、排气扇个数及是否存在裂缝,包括不同长度、宽度的裂缝等多种工况进行仿真计算分析,得到管道内部不同工况下的电磁环境,分析得出影响直管道电磁环境的主要因素。随着管道长度增加,电磁环境强度降低;管道半径增加,电磁环境强度增加;端口封闭或存在金属网条会对电磁环境强度起到削弱作用;排气扇个数增加,电磁环境强度降低;裂缝存在与否,裂缝长度、宽度不同的工况对电磁环境强弱基本无影响。研究结论可为通风管道设计及现存管道抗核爆电磁脉冲加固提供参考。

Coupling Response Study of HEMP on Straight Ventilation Channel

Under the condition of HEMP (high-altitude nuclear explosion electromagnetic pulse), through the analysis of the radius, length, opening or closing of the pipe port, or adding metal mesh to the port, and whether there are exhaust fans, the number of exhaust fans and whether there are cracks, including cracks of different length and width, the electromagnetic environment of the pipe under different working conditions is obtained, and the main factors affecting the electromagnetic environment of the straight pipe are analyzed. With the increase of the length of the pipeline, the intensity of the electromagnetic environment will decrease, the radius of the pipeline increases, with the increase of pipe radius, the strength of the electromagnetic environment will increase, the closure of the port or the presence of the metal mesh strip will weaken the strength of the electromagnetic environment, the number of exhaust fans will increase, the strength of electromagnetic environment will decrease, whether the cracks exist or not, and the conditions with different length and width have no effect on the strength of the electromagnetic environment. The conclusion can be used as a reference for the design of ventilation pipes and the reinforcement of existing pipes against nuclear explosion electromagnetic pulse.