Simulation Analysis of Combined Foam Drop Impact for UAV Protective Packaging

YI Li; LUO Junjie; TIAN Yuanhao; LIU Shuai; XU Hao; BAI Tao

doi:10.19554/j.cnki.1001-3563.2026.09.012

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Packaging Engineering ›› 2026, Vol. 47 ›› Issue (9) : 118-124. DOI: 10.19554/j.cnki.1001-3563.2026.09.012

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

Simulation Analysis of Combined Foam Drop Impact for UAV Protective Packaging

YI Li^*, LUO Junjie, TIAN Yuanhao, LIU Shuai, XU Hao, BAI Tao

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Abstract

To address the protective needs of medium and large UAVs during transportation, the work aims to conduct research on the fitting of dynamic constitutive models for composite foams and their cushioning and energy absorption characteristics and systematically evaluate the impact protection effects of composite foams on the UAV's head and tail during a drop test, as well as their impact protection effects on fragile components, providing design basis for high-reliability packaging of UAVs. Dynamic response data were obtained from a simplified model drop test of UAV packaging boxes. The strain rate-dependent parameters of the constitutive model of composite foam materials were iteratively fitted. Based on LS_DYNA, a finite element model of the UAV packaging box was established for 1.5 m drop simulation analysis. The fitted and calibrated material constitutive model could effectively characterize the dynamic response characteristics of composite foams. The simulation curves exhibited a high degree of agreement with the test curves, effectively managing impact energy. Under the 1.5 m drop condition, key components in the UAV's head and tail did not collide rigidly with the packaging box, and the acceleration of key components did not exceed the limit. The method of fitting the constitutive model of composite foam materials with the test results from simplified tests can effectively improve the authenticity and prediction accuracy of drop analysis for complex cushioning systems.

Key words

LS_DYNA / combined foam / UAV packaging box / strain rate

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YI Li, LUO Junjie, TIAN Yuanhao, LIU Shuai, XU Hao, BAI Tao. Simulation Analysis of Combined Foam Drop Impact for UAV Protective Packaging[J]. Packaging Engineering. 2026, 47(9): 118-124 https://doi.org/10.19554/j.cnki.1001-3563.2026.09.012

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