Static Characteristics of Copper Cylinders for Chamber Pressure Measurement

doi:10.3969/j.issn.1000-1093.2017.02.028

Abstract

Abstract: Copper cylinders as a sensing element of crusher gauges are widely used for measuring the peak pressure in weapon chamber. In order to improve the measuring accuracy, a new mathematic model is proposed to investigate the static deformation of copper cylinders. The model parameters are estimated based on calibrated data.The calculated results are in good agreement with the experimental results. This model can be well applied to estimate the static deformation law of copper cylinders, and has wide applicability to different specifications of copper cylinders. According to the mathematical model, the variation of copper cylinder pressure sensitivity with deformation and the influence of machining dimension deviation on the accuracy of pressure measuring are calculated. When the height of copper cylinder after compression is 73% of its original one, the pressure sensitivity of the copper cylinder is the highest. The geometric dimension tolerances of copper cylinder and piston are the main factors which affect the pressure measurement uncertainty. The pressure measuring precision of copper cylinders can be improved by improving the machining precision obviously. Key

Key words: ordnancescienceandtechnology, chamberpressuremeasurement, coppercylinder, crushergauge, staticcharacteristic

CLC Number:

TJ012.1⁺6

WANG Fang, GUO Zeng-gui, ZHU Ming-wu. Static Characteristics of Copper Cylinders for Chamber Pressure Measurement[J]. Acta Armamentarii, 2017, 38(2): 412-416.

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ARMAMENTARIIVol.38No.2Feb.2017

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