目的 为满足脉冲爆震发动机爆震管等先进装备对承载-散热-抗爆一体化的设计需求,以波纹通道夹层圆柱壳为研究对象,旨在系统评估其在极端内爆载荷下的动态响应与抗爆承载能力。方法 通过采用ABAQUS/CONWEP有限元模块,研究芯体高度、壁厚及内外壳体厚度等关键几何参数对结构抗爆性能的影响,并与蜂窝、传统波纹及I型芯体等典型夹层结构进行性能对比。结果 在等质量约束下,增加芯体高度与减小芯体壁厚是提升结构抗爆性能的有效途径。此外,内外壳体的最优厚度分配呈现出显著的载荷依赖性。在本文研究的构型与工况下,以约40 g TNT当量为临界载荷,当内爆强度低于此值时,采用薄内壳的构型（以芯体压溃吸能为主）更具优势;当载荷高于此值时,则需采用厚内壳构型（以结构整体抗弯为主）来保证生存能力。结论 本研究揭示的几何参数影响规律和载荷依赖性设计策略,为波纹通道夹层圆柱壳在极端动态载荷环境下的工程应用,提供了抗爆性能理论依据与量化设计指导。
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.
关键词
波纹通道芯体 /
内爆 /
抗爆性能 /
爆震管
Key words
corrugated-channel core /
internal blast loading /
blast resistance /
pulse detonation engine tube
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基金
国家自然科学基金资助项目（12002156）; 航空航天结构力学及控制全国重点实验室（南京航空航天大学）自主研究课题资助（MCAS-I-0125K01）
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