基于仿真与量纲分析的不同药量TNT内爆下多舱室结构毁伤规律研究

焦晓龙; 赵鹏铎; 姚养无; 张磊; 李旭东; 池海

doi:10.11883/bzyjc-2019-0438

基于仿真与量纲分析的不同药量TNT内爆下多舱室结构毁伤规律研究

doi: 10.11883/bzyjc-2019-0438

焦晓龙^{1, 2,},
赵鹏铎^1, ,,
姚养无²,
张磊¹,
李旭东^{1, 2},
池海^{1, 2}

1.
海军研究院，北京 100161
2.
中北大学机电工程学院，山西太原 030051

详细信息

作者简介:
焦晓龙（1993－　），男，硕士研究生，419277865@qq.com

通讯作者:
赵鹏铎（1983－　），男，博士，工程师，zhaopengduo@163.com

中图分类号: O383.3
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- 被引次数: 0
出版历程
- 收稿日期: 2019-11-18
- 修回日期: 2020-03-28
- 网络出版日期: 2020-07-25
- 刊出日期: 2020-08-01

Regulation of different quantity TNT blasting in multi-cabin structure based on simulation and dimensional analysis

JIAO Xiaolong^{1, 2
,},
ZHAO Pengduo^{1
, ,},
YAO Yangwu²,
ZHANG Lei¹,
LI Xudong^{1, 2},
CHI Hai^{1, 2}

1.
Naval Research Academy, Beijing 100161, China
2.
School of Mechatronic Engineering, North University of China, Taiyuan 030051, Shanxi, China

摘要

摘要: 利用流固耦合算法，模拟了不同药量TNT内爆下大尺寸多舱室结构的毁伤效应。将各舱室划分为爆炸舱、共面邻舱、共边界邻舱和共点邻舱，再划分内爆下多舱室结构的毁伤等级。通过量纲分析，研究了内爆载荷下舱壁的变形失效规律，推导了内爆下多舱室结构的无量纲毁伤数，该毁伤数考虑了内爆载荷、材料性能和作用空间等因素，最后给出快速毁伤预测方法。研究结果表明：（1）内爆下多舱室结构的毁伤特点主要表现为舱壁挠曲变形、舱壁中心冲切失效、舱壁边界撕裂；（2）舱壁挠曲变形的挠厚比δ/H和固定边界撕裂的裂缝长厚比l/H均与药量-单舱室容积比m/V有明显线性关系；（3）提出的无量纲毁伤数和快速预测方法能够反映内爆下多舱室结构的毁伤情况，可为舰船毁伤研究提供参考。
- 舱内爆炸 /
- 多舱室结构 /
- 毁伤等级 /
- 无量纲毁伤数 /
- 快速毁伤预测
Abstract: This paper simulated damage effect of the large size multi-cabin structure under internal blast. Cabins were divided into: explosion cabin, coplanar cabin, common boundary cabin and common point cabin, and the damage grade was presented to reflect the destructiveness. This paper studied the regulation of deformation and failure of bulkhead under internal blast by the dimensional analysis, in which a dimensionless damage number was deduced. Furthermore, the number can reflect the characteristics of internal explosive load, material properties and structure. Finally, a rapid damage prediction method was given. The analysis result shows: (1) the characteristics of damage include large deflection deformation, punching failure in the center of plate, tearing along the boundary; (2) the ratio of deflection to thickness (δ/H) has clear linear relationship with the ratio of the quantity to the volume of the cabin (m/V), and so is the ratio of length to thickness of tearing (l/H); (3) the dimensionless damage number and method of rapid damage assessment can reflect the destructiveness, which means the result and analysis method of this paper can provide valuable reference for the research of ship damage.
- internal blast /
- multi-cabin structure /
- damage grade /
- dimensionless damage number /
- rapid damage prediction

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图 1 多舱室结构模型和1/8模型

Figure 1. Whole model and 1/8 model of multi-cabin structure

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图 2 多舱室结构有限元模型

Figure 2. Finite element model of multi-cabin structure

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图 3 实验装置和测点布置^[12]

Figure 3. Experimental device and pressure gauge arrangement^[12]

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图 4 结构分类

Figure 4. Structural classification

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图 5 各种毁伤等级对应的典型毁伤情况

Figure 5. Typical damage situations corresponding to various damage grades

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图 6 最大挠度和裂缝长度与TNT药量的关系

Figure 6. Relationship of maximum deflection and tearing length with TNT charge

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图 7 内爆下多舱室结构毁伤等级预测曲线

Figure 7. Prediction curve of damage grade of multi-cabin structure under internal blast

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图 8 实验装置^[23]

Figure 8. Experimental device^[23]

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图 9 装置内部失效状况^[23]

Figure 9. Device internal failure^[23]

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表 1 实测压力峰值和数值模拟计算结果的对比

Table 1. Comparison of measured peak pressures and numerical simulation results

测点	压力峰值/MPa			模拟计算误差/%
测点	实测	模拟计算	经验公式	模拟计算误差/%
P1	1.180	1.153	0.928	−2.29
P2	0.157	0.171	0.150	8.92
P3	0.449	0.471	0.451	4.90

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表 2 结构分类

Table 2. Structural classification

类别	分类	具体描述
邻舱	C1	共面邻舱
	C2	共边界邻舱
	C3	共点邻舱
舱壁	A1	共面邻舱中的外围(灰色)舱壁
	A2	共面邻舱中的(绿色)舱壁
	A3	共边界邻舱中的外围(蓝色)舱壁
	A4	共点邻舱的所有舱壁(橙色)
边界	B1	共边界邻舱和爆炸舱的共有(黄色)边界
边界	B2	共面邻舱和共点邻舱的共有(黑色)边界

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表 3 毁伤等级的描述

Table 3. Description of damage grade

毁伤等级	破损现象描述
G1	爆炸舱舱壁均向外挠曲变形，但未破损
G2	爆炸舱舱壁中心发生冲切破坏，甚至有破片飞出，残余舱壁有翻转撕裂或卷边现象；A1类舱壁向外挠曲变形，但未破损
G3	爆炸舱舱壁沿边界剪切失效后飞出；A1类舱壁的中心产生破口，甚至有破片飞出，残余舱壁发生翻转撕裂
G4	A2类舱壁沿B2类边界从靠近爆源一端向外撕裂破坏，此外A2类舱壁在垂直裂缝的方向上也有不同程度撕裂破坏；共点邻舱共点处的A4类舱壁均向该舱室内部塌陷挠曲变形；A3类舱壁向外挠曲变形
G5	A2类舱壁间的B1类边界从两端向中心撕裂贯穿；甚至在共点邻舱共点处的A4类舱壁的三面交接处发生反向撕裂，并伴随B2类边界不规则的扭曲现象

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表 4 数值模拟结果与准静态压力经验公式结果的对比

Table 4. Comparison between numerical simulation results and quasi-static pressure empirical formula results

m/kg	p_qs/MPa		相对误差/%
m/kg	Carlson公式	数值模拟	相对误差/%
20	2.364	2.210	–6.51
30	0.678	0.651	–3.98
40	0.881	0.815	–7.49
60	1.219	1.104	–9.43
80	1.564	1.526	–2.43
130	2.414	2.266	–6.13

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