The influence of sensor installation angle on explosive shock wave overpressure test

Wang, Liangquan; Kong, Deren

doi:10.21595/vp.2021.22184

Cited by 3 publications

(3 citation statements)

References 3 publications

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“…where P is the gas pressure; γ is the as adiabatic coefficient; ρ is the air density; ρ 0 is the initial gas density; E is the energy density (explosive energy per unit volume). The parameters are shown in Table 1 [21,22]. The TNT explosive explosion process is described by JWL state equation, which is shown in Eq.…”

Section: Explosion Field Numerical Simulation Modelmentioning

confidence: 99%

Study on the ground impact vibration intensity model of high energy warhead explosion

2023

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Introduction: In the warhead explosion process, the ground impact vibration intensity will directly affect the target buildings and instruments safety, and it is also of great significance to accurately evaluate the ammunition explosion damage power.Methods: In this study, the finite element numerical simulation method was used to analyze the explosion shock wave pressure and ground shock vibration velocity of TNT explosive with a mass of 100 kg∼1000 kg, and the ground transmission medium of sandy soil, C35 and C140 concrete, and the shock wave pressure and ground shock vibration velocity propagation and distribution law was clarified. Based on the explosion similarity law and dimensional analysis method, a ground impact vibration velocity theoretical calculation model with clear physical significance is established by introducing the property ground propagation medium parameters, taking into account the factors affecting the ground impact vibration velocity.Results: The model calculation accuracy is verified by the measured data. The verification results show that the model calculation accuracy is higher than 91.8%, which improves the calculation accuracy of the explosion site ground impact vibration velocity.Discussion: This research provides more accurate and scientific theory and data support for the ammunition explosion damage power evaluation, and provides a reference for the shock and vibration resistance performance design of instruments, equipment and buildings. It has strong engineering application value.

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Section: Explosion Field Numerical Simulation Modelmentioning

confidence: 99%

Study on the ground impact vibration intensity model of high energy warhead explosion

2023

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“…22 The TNT explosive explosion process is described by JWL state equation, which is shown in equation ( 5). 23,24…”

Section: Finite Element Numerical Simulationmentioning

confidence: 99%

Influence of sensor installation tilt angle on explosion shock wave pressure test

Wang,

Kong

2023

Measurement and Control

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The surface reflection pressure sensor installation flatness will directly lead to the change of the explosion shock wave pressure propagation and distribution law, affecting the test results accuracy, and the test data cannot accurately evaluate the ammunition explosion damage power. In this study, the numerical simulation model of the explosion shock wave pressure propagation and distribution law was established by using the explosive mechanics simulation software, and the pressure distribution law was studied when the sensors installation angles were 0°, 4°, 8°, 12°, −4°, −8°, and −12° respectively. Combined with analysis of the pressure peak value and the pressure evolution nephogram at different measuring points, it is clarified that the positive tilt angle of the sensor installation has an enhancing effect on the pressure peak, while the negative tilt angle has a attenuation effect on the pressure peak. Based on the calculation function formula of the surface reflected pressure peak value in the national defense engineering design code, the surface reflected pressure peak value correction function formula is established by introducing the sensor installation angle correction effect. This study results provide a theoretical basis for the design of ammunition explosion shock wave pressure engineering test scheme and the test data validity verification.

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“…Shock waves produced via explosions using various warheads play a vital role in core damage. In recent years, intensive research on high-energy damage has led to novel and innovative research on warheads that requires accurate shock wave and other power data to support its rapid progress [1][2][3]. Presently, procurement of military warheads, weapons, and equipment generally involves the comparison of their ground reflection pressure, where equipment generating a higher ground reflection pressure are procured.…”

Section: Introductionmentioning

confidence: 99%

Effect of sensor installation angle on measurement of explosion shock wave pressure

Wang¹,

Shang²,

Kong³

2022

Meas. Sci. Technol.

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The inclination of a shock wave pressure sensor with respect to the ground has been reported to have a significant effect on the accuracy of the measured shock wave pressure. Extensive research is required for the planning of damage power test site layouts and improvement of the accuracy of blast shock wave pressure tests. Thus, in this study, we established a 3D numerical simulation model based on a real shooting range test site and investigated the effects of various sensor installation angles and measurement point distances on the shock wave overpressure via multi-point modeling. Overpressure data and pressure evolution contour plots were generated from seven sensor installation angles and six measurement points. Overpressure–time history curves, peak overpressure decay rates, and relative change in the peak overpressure with the installation angle were analyzed to investigate the effects of the sensor installation angle on the pressure test. The data obtained from the numerical simulation model were verified via field explosion tests. Furthermore, a theoretical correction model for the measured surface reflection pressure with respect to the installation angle was established, and a model calculation accuracy of 91.33%.

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The influence of sensor installation angle on explosive shock wave overpressure test

Cited by 3 publications

References 3 publications

Study on the ground impact vibration intensity model of high energy warhead explosion

Study on the ground impact vibration intensity model of high energy warhead explosion

Influence of sensor installation tilt angle on explosion shock wave pressure test

Effect of sensor installation angle on measurement of explosion shock wave pressure

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