爆炸震动对整体隔震电磁屏蔽室屏蔽效能的影响

为解决电磁屏蔽室在爆炸引起的地冲击震动下屏蔽效能严重下降的问题，结合自有专利技术的隔震器，设计建造了整体隔震电磁屏蔽室，并利用野外化爆试验及屏蔽效能测试，研究爆炸冲击震动对整体隔震电磁屏蔽室屏蔽性能的影响。测试结果表明，在累计装药量160 kg的多炮次爆炸冲击震动下，尽管输入的震动加速度峰值高达115 m/s²，但采取了整体隔震措施的屏蔽室底板加速度响应峰值仅18 m/s²，有效地减轻了冲击震动对屏蔽室的不利影响，实现了所设计的电磁屏蔽室屏蔽效能不出现较大损失，仍满足Ⅰ级屏蔽指标的要求。

Influence of Blast Shock on Shielding Effectiveness of Electromagnetic Shielded Enclosure with Integral Shock Isolation

Shielding effectiveness of electromagnetic shielded enclosure would be decreased by blast shocks. An electromagnetic shielded enclosure with the shock isolator with own patented technology is designed and constructed. The field blasting and shielding performance tests are conducted to study the effect of blast shock on the the shielding effectiveness of electromagnetic shielded enclosure with integral shock isolation. The results show that the vibration acceleration of electromagnetic shielded enclosure with integral shock isolation is only 18 m/s² although the input vibration acceleration peak is up to 115 m/s² under the blast shocks of 160 kg cumulative charge. This means that the integral shock isolation effectively reduces the impact of blast shock on electromagnetic shielded enclosure. The electromagnetic shielded enclosure meets the requirement of GradeⅠ.