Study on pressure wave response and overpressure attenuation law of explosion-proof doors

Pan, Rongkun; Cui, Bang; Zhang, Xuebo; Wang, Yanming; Zheng, Ligang

doi:10.1016/j.psep.2022.11.032

Cited by 4 publications

(3 citation statements)

References 34 publications

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“…Within a unit time, when the undisturbed medium unit mass of internal energy is e 0 , the kinetic energy flowing into the wavefront surface is represented by 1 2 ρ 0 (D − ν 0 ) 2 . The kinetic energy flowing out is denoted as 1 2 ρ(D − ν) 2 . The work performed by the pressure on both sides of the wavefront surface is indicated by P 0 (D − ν 0 ), P(D − ν).…”

Section: Measurement Modelmentioning

confidence: 99%

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Research on the Shock Wave Overpressure Peak Measurement Method Based on Equilateral Ternary Array

Zhang,

Peng,

Lin

et al. 2024

Sensors

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The measurement process of ground shock wave overpressure is influenced by complex field conditions, leading to notable errors in peak measurements. This study introduces a novel pressure measurement model that utilizes the Rankine−Hugoniot relation and an equilateral ternary array. The research delves into examining the influence of three key parameters (array size, shock wave incidence angle, and velocity) on the precision of pressure measurement through detailed simulations. The accuracy is compared with that of a dual-sensor array under the same conditions. Static explosion tests were conducted using bare charges of 0.3 kg and 3 kg TNT to verify the numerical simulation results. The findings indicate that the equilateral ternary array shock wave pressure measurement method demonstrates a strong anti-interference capability. It effectively reduces the peak overpressure error measured directly by the shock wave pressure sensor from 17.73% to 1.25% in the test environment. Furthermore, this method allows for velocity-based measurement of shock wave overpressure peaks in all propagation direction, with a maximum measurement error of 3.59% for shock wave overpressure peaks ≤ 9.08 MPa.

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Section: Measurement Modelmentioning

confidence: 99%

“…In modern warfare, terrorist attacks, and accidental explosions, the blast shock wave stands out as a key contributor to casualties in various explosive events [ 1 , 2 , 3 , 4 ]. Studies reveal that over 60% of injuries to the torso and head of blast victims are related to the blast shock wave [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

Research on the Shock Wave Overpressure Peak Measurement Method Based on Equilateral Ternary Array

Zhang,

Peng,

Lin

et al. 2024

Sensors

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show abstract

“…In recent years, domestic scholars have conducted a lot of research on environmental vibration analysis and evaluation. Scholars [2][3][4][5][6][7] carried out vibration observation in the near railway area of different railways respectively, and analyzed the vibration propagation law based on the observation data. In 2008, Lei Xiaoyan et al [8] firstly drew on the environmental vibration evaluation method in the United States to evaluate the environmental vibration caused by the train operation.…”

Section: Introductionmentioning

confidence: 99%

On Site Measurement and Evaluation of Environmental Vibration Caused by Ordinary Speed Train Operation

2024

Teh. vjesn.

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In order to study the environmental vibration characteristics and evaluation of the saturated soil site in the cold northern region caused by the train, vibration observation was carried out on a saturated soil site in a near railway area of the Harbin-Manzhouli Railway, and the environmental vibration caused by different trains at different operating speeds was analyzed in the time and frequency domains. The observation results were evaluated by using the 1/3 octave vibration acceleration level and the maximum weighted plumb vibration level as evaluation index. The results show that the acceleration decreases with the increase of distance, and the acceleration decreases rapidly from 10 m to 30 m, and slowly after 30 m. The vibration energy of the measurement points at 10 m and 20 m is concentrated in 15 -60 Hz, and the vibration energy of the measurement points after 30 m is concentrated in 15 -20 Hz. With the increase of the distance from the center of the track, the 1/3 octave vibration acceleration level and the maximum weighted plumb vibration level all show a trend of attenuation. The maximum weighted plumb vibration levels at 30 m are 70.8 dB and 71.3 dB for upward and downward trains, and 77.4 dB and 71.4 dB for upward and downward freight trains, respectively, which are greater than the weighted plumb vibration level limit for special residential buildings. The maximum value of vibration acceleration level at the 10 m measurement point is 88.6 dB, which exceeds the limit by 9.5 dB, and that of 30 m measurement point is 69.8 dB, which meets the specification requirements. The results of the study can provide basic data for the environmental vibration characterization of saturated soil sites caused by train operation and the environmental vibration design of residential, agricultural and water conservancy infrastructures in the near-railway area.

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Suppressive effects of alkali metal salt modified dry water material on methane-air explosion

Tian,

Qin,

et al. 2023

Energy

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Study on pressure wave response and overpressure attenuation law of explosion-proof doors

Cited by 4 publications

References 34 publications

Research on the Shock Wave Overpressure Peak Measurement Method Based on Equilateral Ternary Array

Research on the Shock Wave Overpressure Peak Measurement Method Based on Equilateral Ternary Array

On Site Measurement and Evaluation of Environmental Vibration Caused by Ordinary Speed Train Operation

Suppressive effects of alkali metal salt modified dry water material on methane-air explosion

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