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Dynamic response of sandwich panel attached with a double mass-spring-damping system to shallow-buried explosion: analytical modeling

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Abstract

How to ensure the safety of occupants has become a challenge for protective design of armored vehicles against intensive blast loadings. In this study, for armored vehicles subjected to shallow-buried explosions, an analytical model was established to characterize the dynamic performance of an all-metallic sandwich floorboard attached with a double mass-spring-damping system (mimicking seat and occupant), with the former consisting of a front face, a core and a rear face. For validation, numerical simulations with the method of finite elements (FE) were performed. Good agreement between analytical predictions and numerical results was achieved.The analytical model was then employed to quantify the effects of explosive mass, yield stress of material make, configurational parameters of sandwich panel, spring stiffness, and damping coefficient on dynamic response of the sandwich panel and double mass-spring-damping system. With increasing explosive mass and decreasing yield stress of material make, the peak displacements of rear face, seat and occupant were all found to increase. As core relative density was increased, these peak displacements also increased when the ratio of face thickness to core height was relatively small. Increasing the ratio of face thickness to core height led to increased peak accelerations of seat and occupant. The peak displacement of rear face was insensitive to the increase of either spring stiffness or damping coefficient, while the peak acceleration of occupant increased with increasing spring stiffness. Upon increasing the damping coefficient between the rear face and seat or that between the seat and occupant or both, the peak acceleration of occupant increased. With occupant safety duly considered, the proposed analytical model provides useful guidance for designing high-performance protective structures for armored vehicles subjected to intensive blast loadings.

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Authors and Affiliations

  1. State Key Laboratory of Mechanics and Control for Aerospace Structures, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China

    DuJiang Zhang, ZhenYu Zhao, HuiYao Gao & TianJian Lu

  2. MIIT Key Laboratory of Multifunctional Lightweight Materials and Structures (MLMS), Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China

    DuJiang Zhang, ZhenYu Zhao, HuiYao Gao & TianJian Lu

Authors
  1. DuJiang Zhang
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  2. ZhenYu Zhao
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  3. HuiYao Gao
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  4. TianJian Lu
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Correspondence to ZhenYu Zhao or TianJian Lu.

Additional information

This work was supported by the National Natural Science Foundation of China (Grant Nos. 11972185 and 12002156), the Research Fund of State Key Laboratory of Mechanics and Control of Mechanical Structures (Grant No. MCMS-I-0222K01), the Fund of Prospective Layout of Scientific Research for NUAA, and the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).

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Zhang, D., Zhao, Z., Gao, H. et al. Dynamic response of sandwich panel attached with a double mass-spring-damping system to shallow-buried explosion: analytical modeling. Sci. China Technol. Sci. 67, 568–586 (2024). https://doi.org/10.1007/s11431-023-2375-0

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  • DOI: https://doi.org/10.1007/s11431-023-2375-0

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