Journal of Guangxi Normal University(Natural Science Edition) ›› 2014, Vol. 32 ›› Issue (2): 9-13.

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Effect of Nick in Pressure Bar on Measure of Reflected Pressure

YI Chen-hong, HU Mei-e, HU Ba-yi   

  1. Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang Sichuan 621900, China
  • Received:2013-06-30 Online:2014-06-25 Published:2018-09-25

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Abstract: The finite element method was applied to analyze the pressure bar system. The effect of the nick on the pressure bar surface is studied. With numerical simulation the response of different rising front of trapezium impulse and triangle impulse is studied. The investigation indicates that the nick in the pressure bar has great effect on the measure results. And the shorter the impulse rise time is, and the bigger the peak value is. In addition, the nick affects the amplitude of the trapezium impulse more, and also, the vibration frequency of the triangle impulse more. The simulation results have some value for measuring the reflected pressure with experiments.

Key words: reflected pressure, strain, stress wave, pressure bar

CLC Number: 

  • O38
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