Optimization of detonation parameters for multi-point aggregated explosion effects in concrete

SHI Benjun; LI Jie; XU Xiaohui; XU Tianhan; GUO Wei; LI Xiaochen; LI Chao; LI Gan

doi:10.11883/bzycj-2024-0023

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SHI Benjun, LI Jie, XU Xiaohui, XU Tianhan, GUO Wei, LI Xiaochen, LI Chao, LI Gan. Optimization of detonation parameters for multi-point aggregated explosion effects in concrete[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2024-0023

Citation:

SHI Benjun, LI Jie, XU Xiaohui, XU Tianhan, GUO Wei, LI Xiaochen, LI Chao, LI Gan. Optimization of detonation parameters for multi-point aggregated explosion effects in concrete[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2024-0023

Citation:

SHI Benjun, LI Jie, XU Xiaohui, XU Tianhan, GUO Wei, LI Xiaochen, LI Chao, LI Gan. Optimization of detonation parameters for multi-point aggregated explosion effects in concrete[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2024-0023

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Optimization of detonation parameters for multi-point aggregated explosion effects in concrete

doi: 10.11883/bzycj-2024-0023

State Key Laboratory of Explosion & Impact and Disaster Prevention & Mitigation, Army Engineering University of PLA, Nanjing 210007, Jiangsu, China

Received Date: 2024-01-09
Rev Recd Date: 2024-09-03

Available Online: 2024-09-04

Abstract

Abstract

Simultaneous or slightly different explosions at multiple points in the concrete medium can generate a complex superposition and aggregation effect of ground shock waves, significantly enhancing the pressure of ground shock waves in a specific area and greatly improving the destructive power of the explosion. In order to obtain the explosion aggregation effect and ground shock propagation attenuation law under the different arrangement of multi-point explosive sources. Firstly, field tests were carried out on single and seven-point aggregated explosions in concrete. Then, the reliability of the RHT material model parameters and the SPH numerical algorithm were verified based on experimental data. On this basis through the orthogonal design method and gray system theory on the multi-point detonation parameters for the optimization of design. Gray correlation coefficients and gray correlations between scaled charge spacing, scaled active charge height, scaled detonation time difference and peak pressure at different proportional bursting center distances were established. Finally, single-objective factor optimization and multi-objective factor optimization were identified, a set of preferred combinations of each factor was determined, and simulation tests were conducted to verify the results. The analysis results show that the concrete material model of RHT and the SPH algorithm can reasonably predict the shock wave propagation attenuation characteristics of multipoint charge explosions at different scaled bursting center distances as well as the induced damage and destruction of concrete; The main factors affecting the impact of the ground shock aggregation of explosive effect, in order of magnitude: scaled charge spacing, scaled detonation time difference and scaled active charge height. The use of optimized detonation parameters, that is, in the case of this test, in the proportional charge spacing 0.549 m/kg^1/3, the proportional detonation time difference of 0.239 m/kg^1/3, the proportional active charge height of 0, the ground shock aggregation effect to achieve the best, up to the same amount of single-point group charging the same amount of ground shock pressure of 4.7 times.
- gray theory,
- aggregated explosion,
- concrete,
- degree of association,
- optimal design

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References(31)

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