侧向强动冲击下冲击位置对薄壁圆柱壳动态响应的影响

樊召帅; 葛树宏; 岳增申; 彭宇翔; 焦建凯; 刘建华; 张钱城

doi:10.21656/1000-0887.450074

侧向强动冲击下冲击位置对薄壁圆柱壳动态响应的影响

doi: 10.21656/1000-0887.450074

樊召帅^1,,
葛树宏²,
岳增申^{1, 3, ,},
彭宇翔¹,
焦建凯⁴,
刘建华⁴,
张钱城¹

1.
西安交通大学航天航空学院复杂服役环境重大装备结构强度与寿命全国重点实验室，西安 710049
2.
西安航天动力研究所，西安 710100
3.
香港理工大学机械工程系，香港 999077
4.
中国水利水电建设工程咨询西北有限公司，西安 710100

基金项目:

国家自然科学基金 12072250

详细信息

作者简介:
樊召帅(1999—)，男，硕士生(E-mail: fanzhaoshuai@126.com)

通讯作者:
岳增申(1997—)，男，博士生(通讯作者. E-mail: yuezengshen@163.com)

中图分类号: O347
计量
- 文章访问数: 95
- HTML全文浏览量: 29
- PDF下载量: 16
- 被引次数: 0
出版历程
- 收稿日期: 2024-03-25
- 修回日期: 2024-04-05
- 刊出日期: 2025-02-01

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

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

摘要

摘要: 采用有限元分析软件ABAQUS/Explicit研究泡沫子弹侧向冲击的冲击位置(偏置比)对Q235钢薄壁圆柱壳动态响应行为的影响. 基于已有的实验结果，验证了有限元模型的准确性，并通过该模型对比分析了不同偏置比下圆柱壳的动态变形演化、冲击侧与后侧冲击区域中心点的挠度值和圆柱壳的最终变形模式. 研究发现冲击侧冲击区域中心点的挠度均与冲击方向一致，而后侧冲击区域中心点的挠度均与冲击方向相反；圆柱壳的不对称变形模式随着偏置比的增大而更加明显. 进一步地，讨论了不同偏置比下，约束形式、初始动量及长径比对圆柱壳抗冲击能力的影响，结果表明，无论何种约束形式和初始动量大小，偏置比的增大降低了圆柱壳两侧冲击区域中心点挠度的绝对值，同时也减缓了后侧冲击区域中心点挠度在长径比影响下从凹陷到凸起的转变过程. 这种增强机制主要在于偏置比的增大显著提升了边界条件对圆柱壳的约束作用.
- 薄壁圆柱壳 /
- 侧向冲击 /
- 泡沫子弹 /
- 偏置比
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

HTML全文

图 1 泡沫子弹偏置冲击金属薄壁圆柱壳的二分之一有限元模型

Figure 1. The one-half finite element model for the foam projectile eccentrically impacting the metallic thin-walled cylindrical shell

下载: 全尺寸图片幻灯片

图 2 泡沫子弹偏置冲击金属薄壁圆柱壳几何模型示意图

Figure 2. Sketch of the geometric model for the foam projectile eccentrically impacting the metallic thin-walled cylindrical shell

下载: 全尺寸图片幻灯片

图 3 泡沫铝的准静态压缩工程应力-应变曲线^[29]

注为了解释图中的颜色，读者可以参考本文的电子网页版本，后同.

Figure 3. Quasi-static compressive engineering stress vs. engineering strain curves of the aluminum (Al) foam^[29]

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图 4 实验测得薄壁圆柱壳破坏模式^[29]与本文仿真结果的对比

Figure 4. Comparison of experimentally measured failure modes of thin-walled cylindrical shells^[29] and the simulation results

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图 5 实验测得薄壁圆柱壳中心点最终挠度值^[29]与本文仿真结果的对比

Figure 5. Comparison of the experimentally measured permanent mid-point deflections of thin-walled cylindrical shells ^[29] and the simulation results

下载: 全尺寸图片幻灯片

图 6 不同偏置比下薄壁圆柱壳在初始动量M_p=10.01 kPa · s作用下的动态变形演化

Figure 6. Dynamic deformation evolutions of thin-walled cylindrical shells under initial momentum M_p=10.01 kPa · s with different impact offset ratios

下载: 全尺寸图片幻灯片

图 7 金属薄壁圆柱壳受侧向泡沫子弹在不同偏置比下冲击的数值仿真结果

Figure 7. Numerical simulation results of metallic thin-walled cylindrical shells laterally impacted by foam projectiles at different impact offset ratios

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图 8 金属薄壁圆柱壳在不同偏置比下受泡沫子弹侧向冲击的最终变形模式

Figure 8. Final deformation modes of metallic thin-walled cylindrical shells laterally impacted by foam projectiles at different impact offset ratios

下载: 全尺寸图片幻灯片

图 9 不同约束形式下冲击侧和后侧冲击中心点挠度值与偏置比的关系

Figure 9. Effects of impact offset ratios on the center-point deflections on impact and rear sides of the metallic thin-walled cylindrical shell under different constraints

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图 10 不同初始动量下冲击侧和后侧中心点挠度值与偏置比的关系

Figure 10. Effects of impact offset ratios on the center-point deflections on impact and rear sides of the metallic thin-walled cylindrical shell under different initial impact momentums

下载: 全尺寸图片幻灯片

图 11 不同偏置比下冲击侧和后侧中心点挠度值与长径比的关系

Figure 11. Effects of length-to-diameter ratios on the center-point deflections of impact and rear sides of the metallic thin-walled cylindrical shell under different impact offset ratios

下载: 全尺寸图片幻灯片

表 1 Q235钢的J-C塑性模型参数

Table 1. The J-C plasticity model parameters of Q235

material	ρ/(kg/m³)	E/GPa	ν_e	A/MPa	B/MPa	n	C	$\dot{\varepsilon}_0$/s^－1
Q235	7 800	200	0.3	293.8	230.2	0.578	0.065 2	0.002 1

下载: 导出CSV

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