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《Acta Armamentarii》 2007-10
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Pressure Bar Method to Measure the Reflected Blast Wave Pressure in Small Scale Distance

ZHANG De-zhi,LI Yan,ZHONG Fang-ping,LIN Jun-de,WANG Deng-wang,WANG Chang-li (Northwest Institute of Nuclear Technology,Xi'an 710024,Shaanxi,China)  
In order to measure the reflected pressure in explosive vessel,pressure bar system was devised.Propagation of stress wave in the pressure bar was calculated by hydrodynamic code.Frequency response,measurable lower limit and effective measurement time of the pressure bar system were analyzed.For the steel pressure bar system at 8 mm diameter,the frequency response is about 115 kHZ and the measurable lower limit is about 3.6 MPa with resistance strain gage.Pressure bar method was successfully used to measure the reflected pressure in explosive vessel,good result with the measured maximum pressure of 1.2 GPa was obtained. The outcome of these researches indicates that the pressure bar method is a straightforward,wide measurement range,high frequency response,low cost and strong anti-interference ability method to measure the reflected blast wave pressure in the small scale distance.
【CateGory Index】: O383
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