Inverse evaluation of explosion yield in accident scenarios based on audio-video information fusion

LYU Xiao; LU Yonggang; NIU Gongjie; XU Hengwei; ZHANG Zhonghai

doi:10.11883/bzycj-2025-0330

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LYU Xiao, LU Yonggang, NIU Gongjie, XU Hengwei, ZHANG Zhonghai. Inverse evaluation of explosion yield in accident scenarios based on audio-video information fusion[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2025-0330

Citation:

LYU Xiao, LU Yonggang, NIU Gongjie, XU Hengwei, ZHANG Zhonghai. Inverse evaluation of explosion yield in accident scenarios based on audio-video information fusion[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2025-0330

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Inverse evaluation of explosion yield in accident scenarios based on audio-video information fusion

doi: 10.11883/bzycj-2025-0330

1.
Institute of Systems of Engineering, China Academy of Engineering Physics, Mianyang 621999, Sichuan, China
2.
School of Civil Engineering and Architecture, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China

Received Date: 2025-10-09
Rev Recd Date: 2026-02-10

Available Online: 2026-02-10

Abstract

Abstract

To rapidly obtain the explosion power of incident, a non-contact inversion methodology that leverages fused audio-video data to estimate explosion power is presented by analyzing the temporal lag between the optical flash and the arrival of the blast wave. Based on the Hopkinson-Cranz proportionality law, the Rankine-Hugoniot equation, and the free-field and near-ground overpressure models, the critical proportion distance parameter during the attenuation of the shock wave to the sound wave stage is introduced, and a theoretical model for yield inversion based on the travel time of the two waves is constructed. Through near-ground and air explosion experiments, the validity and applicability of the established model are verified, and the influences of explosion height, frame rate, and frame extraction method on the model’s prediction accuracy are analyzed. The results show that in the near-ground explosion condition, the ground reflection effect significantly increases the propagation speed of the explosion wave. Compared with the empirical formula based on the travel time of the shock wave and the improved formula combining the travel time of the sound wave, the dual-wave theoretical model proposed in this paper significantly considers the differences in the propagation characteristics of the shock wave and the sound wave and the ground reflection effect in near-ground explosions. Under the influence of multiple factors such as explosion height, frame rate, and frame extraction method, it shows better stability and superior prediction accuracy.
- audio-visual information fusion,
- dual-wave theory model,
- near-ground explosion,
- explosion yield inversion,
- critical proportion distance

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References(36)

References

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