Calculation model of blast wave loadings of cylindrical charges air moving explosion

WANG Mingtao; CHENG Yuehua; WU Hao

doi:10.11883/bzycj-2023-0447

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WANG Mingtao, CHENG Yuehua, WU Hao. Calculation model of blast wave loadings of cylindrical charges air moving explosion[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2023-0447

Citation:

WANG Mingtao, CHENG Yuehua, WU Hao. Calculation model of blast wave loadings of cylindrical charges air moving explosion[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2023-0447

WANG Mingtao, CHENG Yuehua, WU Hao. Calculation model of blast wave loadings of cylindrical charges air moving explosion[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2023-0447

Citation:

WANG Mingtao, CHENG Yuehua, WU Hao. Calculation model of blast wave loadings of cylindrical charges air moving explosion[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2023-0447

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Calculation model of blast wave loadings of cylindrical charges air moving explosion

doi: 10.11883/bzycj-2023-0447

College of Civil Engineering, Tongji University, Shanghai 200092, China

Received Date: 2023-12-18
Rev Recd Date: 2024-01-09

Available Online: 2024-03-13

Abstract

Abstract

Ammunition warheads are typically cylindrical charges that detonated at moving stage. To accurately calculating the blast wave power field and the blast loadings acting on the structure of cylindrical charges air moving explosion, the peak overpressure and maximal impulse of the incident and reflected blast waves of the cylindrical charges air moving explosion were numerically simulated. Firstly, a three-stage finite element analysis method for cylindrical charges air moving explosion was proposed based on the AUTODYN finite element analysis program, and the reliability of the method was verified by comparing the simulated and test data of existing charges air static and moving explosion tests. Then, on the basis of considering factors such as charge moving velocity, length to diameter ratio, scaled distance, azimuth angle, and rigid reflection, numerical simulations were conducted for 200 sets of scenarios of the cylindrical charges air moving explosion. The distribution characteristics of the moving explosion blast wave field, incident and reflected blast wave loadings were quantitatively analyzed. The results indicate that the blast wave field of moving explosion is moved forward compared to the static explosion, and the wavefront strength is enhanced in the direction of charge movement and weakened in the opposite direction. The effect is positively correlated with the charge moving velocity, while changing the length to diameter ratio is less affected the blast wave field. Furthermore, for the typical scenarios of cylindrical charges air moving explosion in free field and reflected field where cylindrical charges were perpendicular to the target surface air moving explosion, the calculation models for the peak overpressure and maximal impulse of the incident and reflected blast waves of cylindrical charges air moving explosion were proposed. Finally, through carrying out numerical simulations of 40 sets of scenarios for the moving explosions of two simplified cylindrical TNT charges of prototype warheads, and comparing data of calculation models and simulations, the applicability of the proposed calculation model was validated. The results indicate that the calculation model is good at evaluating the blast wave loading of cylindrical charges air moving explosion, which can also provide a certain reference for predicting the moving explosive power of warheads.
- cylindrical charge,
- air moving explosion,
- peak overpressure,
- maximal impulse,
- calculation model

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References(29)

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