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

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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“…In the above simulation model, air is an ideal gas, which is described by the Ideal Gas state equation, as shown in Eq. 1 [20].…”

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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“…In the above model, air is an ideal gas, which is described by the ideal gas state equation, 21 as shown in equation (4).…”

Section: Explosion Shock Wave Pressure Propagation and Distribution Lawmentioning

confidence: 99%

“…The To obtain the shock wave pressure data at different measuring point positions, a pressure monitoring point is set at the center point of the sensor mounting plate to obtain the shock wave pressure varying with time curve at different tilt angles. Due to the large number of models established, taking the sensor mounting plate tilt angle is 12°as an example, the established finite element numerical simulation model is shown in Figure 4 In the above model, air is an ideal gas, which is described by the ideal gas state equation, 21 as shown in equation ( 4).…”

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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“…These noise signals can interfere with the transmission and reception of test signals, affect the accuracy of test results, and cause economic losses and safety hazards in engineering design. In order to reduce the influence of vibration noise on the test results, Wei [2] and Yang [3] improved the sensor to solve some inertial load interference, but did not analyze it from the perspective of the system. Ma [4] explored the Fourier transform algorithm.…”

Section: Introductionmentioning

confidence: 99%

Generation and denoising of vibration noise in shock wave testing

Liu,

Chen,

2024

International Conference on Mechatronic Engineering and Artificial Intelligence (MEAI 2023)

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During the shock wave test, there are vibration noise interference problems due to factors such as the test equipment itself and the vibration of the environment, which affects the analysis of the test results. This article analyzes the mechanism and characteristics of vibration noise generated in shock wave testing, points out the direction of removing vibration noise interference, and introduces adaptive filters to remove vibration noise in data processing, achieving certain results.

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

Cited by 10 publications

References 20 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

Generation and denoising of vibration noise in shock wave testing

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