A simplified calculation method for confined blast loading considering afterburning effect

ZHANG Xuhao; ZHOU Hu; ZHENG Cheng; KONG Xiangshao

doi:10.11883/bzycj-2026-0035

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ZHANG Xuhao, ZHOU Hu, ZHENG Cheng, KONG Xiangshao. A simplified calculation method for confined blast loading considering afterburning effect[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2026-0035

Citation:

ZHANG Xuhao, ZHOU Hu, ZHENG Cheng, KONG Xiangshao. A simplified calculation method for confined blast loading considering afterburning effect[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2026-0035

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A simplified calculation method for confined blast loading considering afterburning effect

doi: 10.11883/bzycj-2026-0035

ZHANG Xuhao^{1, 2
,},
ZHOU Hu^{1, 2
,
,},
ZHENG Cheng¹,
KONG Xiangshao¹

1.
Green & Smart River-Sea-Going Ship, Cruise and Yacht Research Center, Wuhan University of Technology, Wuhan 430063, Hubei, China
2.
School of Naval Architecture, Ocean and Energy Power Engineering, Wuhan University of Technology, Wuhan 430063, Hubei, China

Received Date: 2026-01-22
Rev Recd Date: 2026-04-25

Available Online: 2026-04-29

Abstract

Abstract

Aiming at the problems of complex characteristics of blast load induced by fuel-rich explosives in confined spaces, as well as the high cost of high-precision solution and engineering application, a numerical calculation method for confined blast loading considering the afterburning effect was established. The method was verified for its reliability by comparing the calculated quasi-static pressure, impulse within the saturation response time and residual deformation of the target with the experimental results, with all relative errors controlled within 10%. The spatiotemporal distribution law of confined blast loading in confined spaces was systematically analyzed, and a simplified equivalent loading method considering both the saturation response time and quasi-static pressure was proposed. The reliability of the simplification method was validated by comparing the calculated first peak deformation and residual deformation at the central point with the results from fully coupled calculation, with all errors within 10%. Through an investigation into the spatial distribution form of the equivalent load and the influence of quasi-static pressure on structural response, the results show that within the scope of the current research, the spatial distribution of the equivalent load has a relatively minor effect on structural response, while the contribution of quasi-static pressure cannot be neglected. On the basis of the above findings, a two-stage load simplification model based on the load characteristics at the central point of the target plate was proposed. The reliability of the simplified model was confirmed by comparing the residual deformation values obtained from 10 groups of simplified model calculations with the experimental data, with all errors within 15%. The research results indicate that the proposed model exhibits good applicability under different working conditions; it can significantly improve the calculation efficiency while ensuring the calculation accuracy, and thus provides a technical approach for the simplified analysis of engineering problems related to confined space explosions.
- afterburning effect,
- confined blast loading,
- simplification method,
- quasi-static pressure

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References(33)

References

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