Effects of Impact Positions on Dynamic Responses of Thin-Walled Cylindrical Shells Under Lateral Shock Loadings

FAN Zhaoshuai; GE Shuhong; YUE Zengshen; PENG Yuxiang; JIAO Jiankai; LIU Jianhua; ZHANG Qiancheng

doi:10.21656/1000-0887.450074

Volume 46 Issue 2

Feb. 2025

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Article Navigation > Applied Mathematics and Mechanics > 2025 > 46(2): 175-186

FAN Zhaoshuai, GE Shuhong, YUE Zengshen, PENG Yuxiang, JIAO Jiankai, LIU Jianhua, ZHANG Qiancheng. Effects of Impact Positions on Dynamic Responses of Thin-Walled Cylindrical Shells Under Lateral Shock Loadings[J]. Applied Mathematics and Mechanics, 2025, 46(2): 175-186. doi: 10.21656/1000-0887.450074

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Effects of Impact Positions on Dynamic Responses of Thin-Walled Cylindrical Shells Under Lateral Shock Loadings

doi: 10.21656/1000-0887.450074

1.
State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace Engineering, Xi'an Jiaotong University, Xi'an 710049, P.R.China
2.
Xi'an Aerospace Propulsion Institute, Xi'an 710100, P.R.China
3.
Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hong Kong 999077, P.R.China
4.
China Water Conservancy & Hydropower Engineering Consulting Northwest Co., Ltd., Xi'an 710100, P.R.China

Received Date: 2024-03-25
Rev Recd Date: 2024-04-05
Publish Date: 2025-02-01

Abstract

Abstract

The effects of impact positions (offset ratios) on the dynamic behaviors of Q235 steel thin-walled cylindrical shells under lateral impacts by foam projectiles were explored with finite element software ABAQUS/Explicit. Based on existing experimental results, the accuracy of the finite element model was validated, and the model was employed to conduct a comparative analysis of the dynamic deformation evolution, the deflections at mid-points of the impact region on the impact and rear sides, and the final deformation modes of the cylindrical shell under different offset ratios. The results show that, the deflections at the mid-point of the impact region on the impact side are consistent with the impact direction, while those on the rear side are in the opposite direction; the asymmetric deformation mode of the cylindrical shell becomes more pronounced as the offset ratio increases. Subsequently, the effects of constraint types, initial momentums, and length-to-diameter ratios on the impact resistance of the cylindrical shell under offset lateral impact were studied. The comparisons indicate that, regardless of the constraint type or the initial momentum, an increase in the offset ratio will reduce the absolute values of the deflections at the mid-point of the impact region on both sides, which will also slow down the transition process of deflections at the mid-point of the impact region on the rear side from indentation to bulging, under the influence of the length-to-diameter ratio. This enhancement mechanism is primarily attributed to the significant improvement of the constraining effect of boundary conditions on the cylindrical shell as the offset ratio increases.
- thin-walled cylindrical shell,
- lateral shock loading,
- foam projectile,
- offset ratio

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References

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