Performance of Explosive-proof Equipment in Protecting Against High-level TNT Explosion Sound
LIU Han1, ZHAO Yao1, GUO Zhiwei1, FENG Shunshan1, HUANG Guangyan1，2
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(1.State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China;2.Chongqing Innovation Center, Beijing Institute of Technology, Chongqing 401120, China)
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Published
2022-10-09
Just Accepted Date
Issue Date
2022-06-30
2022-06-30
Abstract
High-level explosive noise (HLEN) is a non-lethal damage accompanying explosions, which can directly damage one's auditory system. Using the mechanism analysis of the HLEN's awareness and propagation, explosive noise tests with different TNT mass are conducted to study the sound pressure (psp), sound pressure level (pspl), propagation laws of free air burst (FAB), flexible explosive proof (FEP), and steel explosive proof (SEP). The HLEN protection performances of FEP and SEP are compared with that of FAB. The results show that the HLEN has typical characteristics of low frequency and high psp & pspl. At 20 m to 40 m from the explosion center, the peak psp attenuations are about 50%, 52%, 48%, and the peak pspl attenuations are about 5.7%, 4.7%, and 4.9% for FAB, FEP and SEP, respectively. The peak psp/pspl travel time is equal, i.e., ΔtFAB=ΔtSEP=ΔtFEP=0.057 s. FEP can weaken the peak psp by 52% to 93.5% and reduce the peak pspl by 4.8% to 9.1%. SEP can decrease the peak psp by 24.6% to 93% and reduce the peak pspl by 1.4% to 6.9%. Human ear injuries are graded on a scale of Ⅰ to Ⅳ. With FAB, the injury is mainly grade Ⅳ and Ⅲ. With FEP, the injury is mainly grade Ⅲ and grade Ⅲ-Ⅱ. With SEP, the injury is mostly grade Ⅳ-Ⅲ and grade Ⅲ.
LIU Han, ZHAO Yao, GUO Zhiwei, FENG Shunshan, HUANG Guangyan.
Performance of Explosive-proof Equipment in Protecting Against High-level TNT Explosion Sound. Acta Armamentarii. 2022, 43(9): 2058-2074 https://doi.org/10.12382/bgxb.2022.0064
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