爆炸震动下钢板屏蔽室动力特性及屏蔽效能实验
|
摘要
为研究钢板屏蔽室在爆炸震动条件下的综合性能,通过野外埋设TNT炸药爆炸震动实验,研究了爆炸震动下焊接式和拼装式钢板屏蔽室的动力特性和屏蔽效能。实验结果表明,焊接式钢板屏蔽室结构强度高、刚度大、变形小,屏蔽效能下降较少;拼装式屏蔽室结构强度较低、刚度较小、变形较大,在爆炸震动加速度达到70～80m/s2时,出现局部钢板塑性变形、部分锡焊点脱焊等局部损伤现象,使屏蔽效能显著下降。因此,防护工程中使用的屏蔽设施应当加强结构的抗震性能或对屏蔽设施采用减震措施。
Steel-plate shield chamber used in underground protective engineering is a critical facility of protection from electromagnetic attack.Through field blast ground shock tests,two steel-plate shield chambers built in assemblage or welding were investigated for their dynamic response and shielding effectiveness under blast ground shock.The test results show that the welded shield chamber with larger structural strength and rigidity has smaller deformation and good shielding effectiveness and that the assembled shield chamber with lower structural strength and rigidity has larger deformation and relatively poor shielding effectiveness due to local plastic deformation of some thin steel plates and separation of some tin weld spots when shock acceleration increases up to 70~80 m/s2.The upgrading of the structural strength and rigidity or isolating of the shield chamber from the blast ground shock are necessary when the shield facilities are used in protective engineering.
Steel-plate shield chamber used in underground protective engineering is a critical facility of protection from electromagnetic attack.Through field blast ground shock tests,two steel-plate shield chambers built in assemblage or welding were investigated for their dynamic response and shielding effectiveness under blast ground shock.The test results show that the welded shield chamber with larger structural strength and rigidity has smaller deformation and good shielding effectiveness and that the assembled shield chamber with lower structural strength and rigidity has larger deformation and relatively poor shielding effectiveness due to local plastic deformation of some thin steel plates and separation of some tin weld spots when shock acceleration increases up to 70~80 m/s2.The upgrading of the structural strength and rigidity or isolating of the shield chamber from the blast ground shock are necessary when the shield facilities are used in protective engineering.
引文
[1]钱七虎,王明洋.高等防护结构计算理论[M].南京:江苏科学技术出版社,2009.
[2]周璧华,高成,石立华,等.人防工程电磁脉冲防护设计[M].北京:国防工业出版社,2006.
[3]龙源,冯长根,徐全军,等.爆破地震波在岩石介质中传播特性与数值计算研究[J].工程爆破,2000,6(3):6-7.LONG Yuan,FENG Chang-gen,XU Quan-jun,et al.Study on propagation characteristics of blasting seismicwaves in a rock medium and numerical calculation[J].Engineering Blasting,2000,6(3):6-7.(in Chinese).
[4]周明华,王晓,毕佳,等.土木工程结构试验与检测[M].南京:东南大学出版社,2002.
[5]梁晓兵,高新华,饶章权,等.开窗对金属板屏蔽小室稳态屏蔽效能影响的对比测试[J].电测与仪表,2005,42(470):53-56.LIANG Xiao-bing,GAO Xin-hua,RAO Zhang-quan,etal.Shielding effectiveness contrast test of metal plateshielding cabin with windows[J].Electrical Measure-ment&Instrumentation,2005,42(470):53-56.(inChinese).
[6]郝忠虎,林大超,白春华.爆炸地震波的冲击特征分析[J].火炸药学报,2004,27(1):31-33.HAO Zhong-hu,LIN Da-chao,BAI Chun-hua.Analys-is of shock characteristic for explosion seismic waves[J].Chinese Journal of Explosive&Propellants,2004,27(1):31-33.(in Chinese).
[7]ALLEN B M.锡焊手册[M].金国樵,译.北京:人民邮电出版社,1979.
[8]徐亮.缝隙对屏蔽效能的影响分析[J].信息与电子工程,2008,6(3):177-178.XU Liang.Analysis of influence of slot on shieldingeffectiveness[J].Information and Electronic Engineer-ing,2008,6(3):177-178.(in Chinese).
[9]MARVIN A C,DAWSON F,WARD S,et al.A pro-posed new definition and measurement of the shieldingeffect of equipment enclosures[J].IEEE Trans on E-lectromagnetic Compatibi-lity,2004,46(3):459-468.
[2]周璧华,高成,石立华,等.人防工程电磁脉冲防护设计[M].北京:国防工业出版社,2006.
[3]龙源,冯长根,徐全军,等.爆破地震波在岩石介质中传播特性与数值计算研究[J].工程爆破,2000,6(3):6-7.LONG Yuan,FENG Chang-gen,XU Quan-jun,et al.Study on propagation characteristics of blasting seismicwaves in a rock medium and numerical calculation[J].Engineering Blasting,2000,6(3):6-7.(in Chinese).
[4]周明华,王晓,毕佳,等.土木工程结构试验与检测[M].南京:东南大学出版社,2002.
[5]梁晓兵,高新华,饶章权,等.开窗对金属板屏蔽小室稳态屏蔽效能影响的对比测试[J].电测与仪表,2005,42(470):53-56.LIANG Xiao-bing,GAO Xin-hua,RAO Zhang-quan,etal.Shielding effectiveness contrast test of metal plateshielding cabin with windows[J].Electrical Measure-ment&Instrumentation,2005,42(470):53-56.(inChinese).
[6]郝忠虎,林大超,白春华.爆炸地震波的冲击特征分析[J].火炸药学报,2004,27(1):31-33.HAO Zhong-hu,LIN Da-chao,BAI Chun-hua.Analys-is of shock characteristic for explosion seismic waves[J].Chinese Journal of Explosive&Propellants,2004,27(1):31-33.(in Chinese).
[7]ALLEN B M.锡焊手册[M].金国樵,译.北京:人民邮电出版社,1979.
[8]徐亮.缝隙对屏蔽效能的影响分析[J].信息与电子工程,2008,6(3):177-178.XU Liang.Analysis of influence of slot on shieldingeffectiveness[J].Information and Electronic Engineer-ing,2008,6(3):177-178.(in Chinese).
[9]MARVIN A C,DAWSON F,WARD S,et al.A pro-posed new definition and measurement of the shieldingeffect of equipment enclosures[J].IEEE Trans on E-lectromagnetic Compatibi-lity,2004,46(3):459-468.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心