壹大型線列核爆電磁脈衝模擬器附近人體感應電流研究

Currents Induced in a Human Body Standing Near a Large Wire-Array Transmission-Line NEMP Simulator

王睿深(Ruei-Shen Wang)

指導教授 ： 陳興義 ； 周錫增

元智大學/工程學院/電機工程學系/碩士(2003年)

摘要

本論文利用時域貫量法與影像法計算人體直接和間接暴露在壹大型線列輸電線型核爆電磁脈衝波模擬器附近的感應電流密度及利用傳輸線TEM模理論與準靜電場定理分析核爆電磁脈衝波模擬器的未受干擾電場，結果發現在核爆電磁脈衝波模擬器之工作區內的電場分佈相當均勻。由研究結果顯示人體在完全接地情況下距離模擬器0~30米之間的最大感應電流密度為人體神經知覺臨界值10 的1600~120倍，而人體假設直立站在完全接地的金屬工作屋內距離模擬器0~30米之間的最大感應電流密度為人體在穩態情況下神經知覺臨界值10 的2倍。值得注意的是最大感應電流密度在瞬間10~100奈秒之間產生，而截至目前為止尚未有在暫態情況下神經感應知覺臨界值相關的完整報告。由研究結果發現金屬工作屋距離模擬器30米以上，則平均遮蔽效應可達90 ﹪以上，本報告建議在核爆電磁脈衝波模擬器附近的操作人員應穿著導電性材質之衣服。

關鍵字

時域貫量法 ； 影像法 ； 核爆電磁脈衝波

並列摘要

The time-domain moment method (TDMM) and image method are used to calculate current densities induced on a human body directly and indirectly exposed to electric fields irradiated from a large wire-array transmission-line NEMP simulator. The TEM-mode transmission line theory and the quasi-static theory are applied in analysis of unperturbed electric fields irradiated from the NEMP simulator. Results of unperturbed electric fields are found homogeneously distributed inside the working volume of the NEMP simulator. From studies, it is found that the maximum current density induced on a perfectly grounded human body directly standing at a distance of 0~30 meters near the NEMP simulator is found to be 1600~120 times of threshold levels of neuromuscular stimulation which is under the steady-state current flow cases. The maximum current density induced on a perfectly grounded human body standing inside a perfectly grounded metallic house, with a distance of 0~30 m between the metallic house and the NEMP simulator, is found to be about 2 times of threshold levels of neuromuscular stimulation. It should be noted that data of induced current density on such transient phenomena of 10~100 ns have not been sufficiently developed in the technical literature to permit quantitative limits on energy transfers that are related to perception thresholds. From study results, it is also found that an averaged shielding effect of 90 ﹪ is obtained for the distance between the metallic house and the NEMP simulator when over 30 meters. Operators working near the NEMP simulator are suggested to wear clothes that are electrically conductive for better protection.

並列關鍵字

time-domain moment method ； image method ； NEMP

參考文獻

[1] C. L. Longmire, “On the Electromagnetic Pulse Produced by Nuclear Explosions, ” IEEE Trans. Electomag. Compat., vol. EMC-20, no. 1, pp. 3-13, February 1978.

[2] C. D. Taylor, ”External Interaction of the Nuclear EMP with Aircraft and Missiles, ” IEEE Trans, Electromag. Compat., vol. EMC-20, no. 1, pp. 64-76 , February 1978.

[3] E. F. Vance and M. A. Uman, “Differences between Lightening and Nuclear Electromagnetic Pulse Interactions,” IEEE Trans. Electromag., vol. EMC-30, pp. 54-62, February 1988.

[4] W. Blumer and N. Ari, “NEMP-Interaction with Plane Multiplayer Structures,” IEE Proceedings —A, vol. 138 , no. 3, pp. 199-204, May 1991.

[5] J. J. A. Klaasen, “An Efficient Method for the Performance Analysis of Bounded Wave Nuclear EMP Simulators,” IEEE Trans. Electromag. Compat., vol. 35, no.3, pp.329-339, August 1993.