Abstract
In the engineering measurement of explosion shock wave pressure, the installation method of shock wave pressure sensor is of great significance to accurately obtain shock wave pressure. Based on the actual shooting range explosion shock wave overpressure test program, this paper uses AUTODYN to establish a finite element numerical simulation model. The distance from the ground reflection pressure sensor to the explosion center is 3 m, 4 m, 5 m, and 6 m. The shock wave overpressure data in the range of 8° and 10° are acquired and analyzed. The analysis results show that the shock wave overpressure obtained when the sensor installation angle is absolute zero is the ideal value. When the sensor installation plate is within a certain range, the overpressure value of the explosion shock wave increases with the increase of the installation angle of the plate, and the installation angle of the sensor is positively correlated with the overpressure of the explosion shock wave.
Highlights
When the ammunition explodes, the shock wave, heat radiation, fragments, etc. produced can effectively kill the ground target
There are few researches at home and abroad on the influence of the installation angle of the sensor on the acquisition of the shock wave overpressure value. Such as: Li Chen, Kong Deren and others based on the impact of shock and vibration on the measurement of shock wave pressure sensors, designed a sensor installation structure for ground reflection pressure measurement, and carried out related simulation experiments
The analysis of the experimental results shows that the sensor installation structure can effectively suppress the impact of mechanical shock on the pressure sensor measurement, and is suitable for the shock wave overpressure measurement in the explosive field [6]
Summary
The shock wave, heat radiation, fragments, etc. produced can effectively kill the ground target. The test results show that the designed wedge sensor mounting structure is very close to the standard free-field sensor test results, and can meet the requirements of the free-field shock wave pressure test [8] It can be seen from the above research that there is currently no comprehensive analysis and research on the inclination angle of the sensor installation. This paper uses AUTODYN to establish the corresponding numerical simulation model to simulate the explosion shock wave of 8kgTNT, set different Gauss measuring points, obtain the sensor shock wave overpressure under different tilt angles, and use the absolute level as the ideal value to calculate the different tilt angles (0°, 3°, 5°, 8°, 10°) sensor response value error, the response value error is used as the basis for evaluating flat panel installation requirements
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