爆炸荷载下不同壁厚圆柱壳动力学行为的研究

陈勇; 纪冲; 龙源; 季茂荣; 高福银; 丁文

doi:10.11858/gywlxb.2014.05.003

爆炸荷载下不同壁厚圆柱壳动力学行为的研究

doi: 10.11858/gywlxb.2014.05.003

陈勇^{1, 2,},
纪冲²,
龙源²,
季茂荣²,
高福银²,
丁文²

1.
南京理工大学化工学院，江苏南京 210094
2.
中国人民解放军理工大学，江苏南京 210007

基金项目: 国家自然科学基金项目(11102233)

详细信息

作者简介:
陈勇(1977—), 男, 博士研究生, 助教, 主要从事含能材料研究. E-mail:188886166@qq.com

中图分类号: O383;E932.2
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出版历程
- 收稿日期: 2012-10-24
- 修回日期: 2013-01-09

Research on Dynamic Behaviors of Cylindrical Shells with Different Wall-Thickness under Explosion Loading

1.
Nanjing University of Science and Technology School ofChemical Engineering, Nanjing 210094, China
2.
PLA University of Science and Technology, Nanjing 210007, China

摘要

摘要: 对爆炸荷载下圆柱壳的动力学行为进行了实验研究及数值模拟。将外径均为100 mm的3种壁厚的Q235钢质圆柱壳置于由TNT药柱产生的爆炸场中进行冲击实验，系统分析了在不同装药高度及壳壁厚度参数条件下圆柱壳的冲击变形模式，即迎爆面局部凹陷变形模式(Mode Ⅰ)、迎爆面局部凹陷与壳整体弯曲变形耦合模式(Mode Ⅱ)、整体变形失效模式(Mode Ⅲ)及局部穿透与整体变形失效耦合模式(Mode Ⅳ)。采用LS-DYNA有限元程序及Lagrangian-Eulerian流固耦合算法，对圆柱壳的非线性动力响应过程进行了数值模拟，分析了圆柱壳的变形历程及最终残余变形的情况，计算结果与实验现象吻合较好。研究结论可为圆柱壳结构爆炸破坏分级及抗爆技术设计提供科学依据。
- 钢质圆柱壳 /
- 爆炸荷载 /
- 动力学行为 /
- 变形模式 /
- 数值模拟
Abstract: Experimental and numerical simulation researches were presented on dynamical behaviors of cylindrical shell structure affected by lateral explosion loading.Impact experiments of explosion loading caused by cylindrical TNT charge on the Q235 steel cylindrical shells with different wall-thicknesses were carried out.The deformation modes of cylindrical shells were analyzed under explosion conditions with different charges and stuctures.These deformation modes include local dent mode(Mode Ⅰ), coupling of local dent and whole bending mode (Mode Ⅱ), whole strcture collapse mode (Mode Ⅲ) and coupling of local perforation and whole strcture collapse mode (Mode Ⅳ).By means of the finite element computer code LS-DYNA, the nonlinear dynamic response process of the cylindrical shells subjected to explosion loading were numerically simulated with Lagrangian-Eulerian coupling method.The deformation process of the cylindrical shells and the final modes were described.The numerical simulation results are in good agreement with experimental data.The results provide a reference for the classification of explosion damage and the design of explosion-resisting structures.
- steel cylindrical shell /
- explosion loading /
- dynamic behaviors /
- deformation modes /
- numerical simulation

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图 1 实验布置示意图

(a) Planform (b) Side elevation

Figure 1. Schematic diagram of experimental layout

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图 2 圆柱壳在侧向爆炸荷载作用下的变形模式

(a) Mode Ⅰ (b) Mode Ⅱ (c) Mode Ⅲ (d) Mode Ⅳ

Figure 2. Four deformation modes of cylindrical shell subjectied to lateral explosion loading

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图 3 圆柱壳中截面变形图(Mode Ⅰ)

(a) δ=2.00 mm, R=6.0 cm (b) δ=2.75 mm, R=6.0 cm (c) δ=2.00 mm, R=8.0 cm (d) δ=2.75 mm, R=8.0 cm

Figure 3. The deformation of middle section of cylindrical shells (Mode Ⅰ)

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图 4 Mode Ⅱ及Mode Ⅲ情况下圆柱壳中截面变形比较

(a) δ=1.50 mm, R=6.0 cm, Mode Ⅲ (b) δ=1.50 mm, R=10.0 cm, Mode Ⅲ (c) δ=1.50 mm, R=12.0 cm, Mode Ⅲ (d) δ=2.00 mm, R=4.0 cm, Mode Ⅱ

Figure 4. The deformation of middle section of cylindrical shells of Mode Ⅱ and Mode Ⅲ

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图 5 中截面变形图(Mode Ⅳ)

(a) δ=1.50 mm, R=6.0 cm (b) δ=2.00 mm, R=3.0 cm

Figure 5. Deformation of middle section (Mode Ⅳ)

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图 6 有限元计算模型

Figure 6. The finite element model

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图 7 圆柱壳的变形破坏过程

Figure 7. Deformation process of steel cylindrical shell

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图 8 圆柱壳中截面的残余变形

(a) Project 1 (b) Project 2 (c) Project 3 (d) Project 4

Figure 8. The residual deformation of middle section of cylindrical shells

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图 9 圆柱壳节点位置示意图

Figure 9. Nodes of the cylindrical shell

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图 10 圆柱壳关键节点的位移-时间曲线

(a) Project 2 (b) Project 3 (c) Project 4

Figure 10. Displacement-time curves of key nodes on cylindrical shell

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表 1 圆柱壳在各工况下受爆炸荷载作用的冲击变形模式

Table 1. Deformation modes of cylindrical shells subjected to explosion loading

Experimental conditions	Deformation of cylindrical shells (Top view)	Deformation of cylindrical shells (Lateral view)	Deformation modes
δ=1.50 mm			R=6.0 cm, Mode Ⅳ R=8.0 cm, Mode Ⅲ R=10.0 cm, Mode Ⅲ R=12.0 cm, Mode Ⅲ
δ=2.00 mm			R=3.0 cm, Mode Ⅳ R=4.0 cm, Mode Ⅱ R=6.0 cm, Mode Ⅰ R=8.0 cm, Mode Ⅰ
δ=2.75 mm			R=3.0 cm, Mode Ⅰ R=4.0 cm, Mode Ⅰ R=6.0 cm, Mode Ⅰ R=8.0 cm, Mode Ⅰ

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