Analysis and Optimization of the Internal Blast Resistance of Corrugated-channel Sandwich Cylindrical Shells

PAN Changping; HE Chao; HAN Shun; GENG Ruming; WANG Chunxu; LI Yong; ZHAO Zhenyu

doi:10.19554/j.cnki.1001-3563.2026.09.007

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Packaging Engineering ›› 2026, Vol. 47 ›› Issue (9) : 73-80. DOI: 10.19554/j.cnki.1001-3563.2026.09.007

Special Topic on Ammunition Response and Protection Technology under Intensive Dynamic Loading

Analysis and Optimization of the Internal Blast Resistance of Corrugated-channel Sandwich Cylindrical Shells

PAN Changping^1,2, HE Chao¹, HAN Shun³, GENG Ruming³, WANG Chunxu³, LI Yong³, ZHAO Zhenyu^1,*

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Abstract

To meet the integrated design requirements of load-bearing, heat dissipation, and blast resistance for advanced equipment such as pulse detonation engine (PDE) tubes, the work aims to investigate a corrugated-channel sandwich cylindrical shell, to systematically evaluate its dynamic response and blast-resistant capacity under extreme internal blast loading. The ABAQUS/CONWEP finite element module was employed to study the effects of key geometric parameters, including core height, core wall thickness, and the thicknesses of the inner and outer face sheets, on the blast resistance of the structure. Performance comparisons were also conducted with typical sandwich structures such as honeycombs, conventional corrugated structures, and I-shaped cores. Under equal-mass constraint, increasing the core height and decreasing the core wall thickness were effective approaches to enhance the structure's blast resistance. Furthermore, the optimal thickness allocation of the inner and outer face sheets exhibited significant load dependency. Within the configurations and conditions studied, with approximately 40 g TNT equivalent as the critical load, a thinner inner face sheet configuration (dominated by core crushing for energy absorption) was more advantageous when the internal blast intensity was below this value. Conversely, when the load exceeded this value, a thicker inner face sheet configuration (relying on global structural bending resistance) was required to ensure survivability. The effect laws of geometric parameters and the load-dependent design strategies revealed in this work provide a theoretical foundation and quantitative design guidelines for the engineering application of corrugated-channel sandwich cylindrical shells under extreme dynamic loading.

Key words

corrugated-channel core / internal blast loading / blast resistance / pulse detonation engine tube

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PAN Changping, HE Chao, HAN Shun, GENG Ruming, WANG Chunxu, LI Yong, ZHAO Zhenyu. Analysis and Optimization of the Internal Blast Resistance of Corrugated-channel Sandwich Cylindrical Shells[J]. Packaging Engineering. 2026, 47(9): 73-80 https://doi.org/10.19554/j.cnki.1001-3563.2026.09.007

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