Measuring Technique of Reflected Blast Wave Pressure Based on Pressure Bar and Photonic Doppler Velocimeter

doi:10.3969/j.issn.1000-1093.2017.07.015

Abstract

Abstract: A pressure measuring system with combining pressure bar with photonic Doppler velocimeter (PDV) is developed for measuring the reflected blast wave pressure in strong electromagnetic interference environment. The axial velocity of PDV probe is eliminated by mounting it in a sliding structure. The velocity curve of bar’s rear surface has many peaks on it due to the multiple reflection of elastic wave in the bar. The velocity of elastic wave is obtained by fitting the takeoff points of the curve. The system response characteristics, effective measuring time and minimum measured pressure are analyzed. The system has been successfully used to measure the reflected blast wave pressure of spherical explosive. The results show that the response of the proposed system is lower than that of strain measuring system, and the minimum measured pressure of the proposed system is better than that of strain measuring system. The maximum pressure of explosion shock wave of spherical explosive is 463.5 MPa with rising edge of 5 μs. This research illustrates that the measuring technique based on pressure bar and PDV is feasible. Key

Key words: explosionmechanics, pressurebar, pressuresensor, photonicDopplervelocimeter, blastwave

CLC Number:

O384

YANG Jun, LI Yan, ZHANG De-zhi, SHI Guo-kai, ZHANG Min, LIU Wen-xiang, WANG Zhao, XIONG Chen. Measuring Technique of Reflected Blast Wave Pressure Based on Pressure Bar and Photonic Doppler Velocimeter[J]. Acta Armamentarii, 2017, 38(7): 1368-1374.

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第38卷
第7期2017 年7月兵工学报ACTA
ARMAMENTARIIVol.38No.7Jul.2017

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