多次水下爆炸对船体梁累积毁伤试验研究

唐正鹏; 李翔宇

doi:10.11993/j.issn.2096-3920.2022.03.012

多次水下爆炸对船体梁累积毁伤试验研究

doi: 10.11993/j.issn.2096-3920.2022.03.012

唐正鹏^{1, 2},
李翔宇^1,

1.
国防科技大学文理学院, 湖南长沙, 410073
2.
中国人民解放军91439部队, 辽宁大连, 116000

基金项目: 国家自然科学基金项目资助(12172380).

详细信息

作者简介:
唐正鹏(1993－), 男, 在读硕士, 主要研究方向为爆炸力学

中图分类号: TJ410; U661.7
计量
- 文章访问数: 70
- HTML全文浏览量: 18
- PDF下载量: 27
- 被引次数: 0
出版历程
- 收稿日期: 2022-03-14
- 修回日期: 2022-04-20
- 录用日期: 2022-04-28
- 网络出版日期: 2022-06-27

Experiments on Cumulative Damage to Hull Girders Subjected to Multiple Underwater Explosions

TANG Zheng-peng^{1, 2},
LI Xiang-yu^1
,

1.
College of Arts and Sciences, National University of Defense Technology, Changsha 410073, China
2.
91439^th Unit, The People’s Liberation of Army, Dalian 116000, China

摘要

摘要: 针对船体梁累积毁伤问题, 开展了多次水下爆炸对船体梁的累积毁伤试验, 考察了爆炸距离、爆炸次数等参数对累积毁伤的影响规律, 基于船体梁挠跨比建立了毁伤等级模型。结果表明: 在中远场水下爆炸加载作用下, 船体梁不发生塑性变形; 在近场作用下, 船体梁会产生中部凹陷的局部塑性变形和整体中拱塑性弯曲变形; 随着爆炸距离的减小, 船体梁整体挠度值增大; 在相同工况下船体梁的累积挠度值与爆炸加载次数近似呈线性关系。
- 多次水下爆炸 /
- 船体梁 /
- 累积毁伤 /
- 毁伤等级
Abstract: For the cumulative damage analysis of hull girders, cumulative damage tests on hull girders subjected to multiple underwater explosions were conducted and the factors affecting cumulative damage were considered, including explosion distance, explosion time, and other parameters. A damage level model for hull girders was established based on the ratio of deflection to the half-length of a hull girder. The results demonstrate that a hull girder does not undergo plastic deformation under the action of medium- and far-field underwater explosion loading. Under the action of near-field explosion loading, a hull girder produces two deformation modes: local plastic deformation of the middle depression and overall plastic bending deformation of the middle arch. With a decrease in the explosion distance, the overall deflection of the hull girder increases. Under the same conditions, the cumulative deflection of a hull girder is approximately linearly correlated with the cumulative loading time of an explosion.
- multiple underwater explosions /
- hull girder /
- cumulative damage /
- damage level

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图 1 船体梁结构图

Figure 1. Structural diagram of hull girder

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图 2 船体梁水中布置图

Figure 2. Underwater layout of hull girder

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图 3 RDX药柱安装布置图

Figure 3. Installation layout of RDX grainl

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图 4 试验装置布置图

Figure 4. Layout of test device

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图 5 压力传感器测点位置

Figure 5. Gauss points of pressure sensor

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图 6 不同测点自由场峰值压力时程曲线

Figure 6. Time history curves of free field peak pressure at different gauss points

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图 7 水中气泡脉动过程

Figure 7. Bubble pulsation process in water

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图 8 船体梁动态响应过程

Figure 8. Dynamic response of hull girder

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图 9 爆距200 mm时船体梁底部变形结果

Figure 9. Bottom deformation of hull girder at 200 mm

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图 10 爆距100 mm时船体梁底部变形结果

Figure 10. Bottom deformation of hull girder at 100 mm

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图 11 受损船体梁静置水中照片

Figure 11. Photo of damaged hull girder standing in water

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图 12 1号船体梁整体变形对比图

Figure 12. Comparison of overall deformation of No. 1 hull girder

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图 13 船体梁局部变形

Figure 13. Partial deformation of hull girder

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图 14 船体梁变形测量点位置

Figure 14. Position of deformation measuring points of hull girder

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图 15 船体梁底板各位置挠度值以及累积变化图

Figure 15. Deflection value and cumulative change diagram of hull girder bottom plate at each position

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表 1 2种型号船体梁的尺寸规格

Table 1. Dimensions of two types of hull girder

型号	材料	长 /mm	宽/mm	高/mm	板厚/mm	横板数量
1	45#	500	65.0	33	1.0	6
2	45#	750	97.5	50	1.5	6

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表 2 试验工况

Table 2. Test conditions

型号	W/g	H/mm	Q/(g^1/3·m⁻¹)	n
1	2.95	300	4.8	1
	2.96	200	7.2	1
	3.00	100	14.4	1
	3.00	100	14.4	5
2	3.00	100	14.4	5

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表 3 水中冲击波参数

Table 3. Parameters of shock wave in water

W/g	D/m	P_m/MPa	T/ms
3	0.49	14.506	0.306
3	0.54	12.918	0.339
3	0.71	9.504	0.449
3	0.76	8.844	0.485

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表 4 船体梁毁伤等级程度划分

Table 4. Classification of damage degree of hull girder

等级	挠跨比	局部变形	整体毁伤程度
Ⅰ	0~0.09	底板塑性变形呈类球冠形	轻度毁伤
Ⅱ	0.09~0.20	明显的塑性锥顶平台	中度毁伤
Ⅲ	0.20~0.30	中部舱段形成塑性铰	重度毁伤
Ⅳ	>0.30	边界发生皱褶屈曲	严重毁伤

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表 5 船体梁变形测量值

Table 5. Measured values of hull girder deformation

型号	n	L/mm	α/rad	d₁/mm	d₂/mm	d₃/mm	d₄/mm	d₅/mm	Δ/mm
1	1	750	0.066	5.7	10.4	15.6	19.7	33.6	13.9
	2	750	0.162	11.9	24.3	38.5	48.3	70.4	22.1
	3	750	0.233	17.8	35.2	54.7	69.4	97.4	28.0
	4	750	0.350	25.1	51.4	80.0	102.9	138.6	35.7
	5	750	0.450	32.4	64.5	101.3	130.6	175.1	44.5
2	1	1 000	0.058	5.5	11.5	17.5	23.1	40.8	17.7
	2	1 000	0.121	11.8	23.4	36.3	48.1	73.6	25.5
	3	1 000	0.178	17.1	35.3	53.7	70.9	102.6	31.7
	4	1 000	0.251	24.2	48.9	72.1	99.4	137.3	37.9
	5	1 000	0.294	28.2	57.6	87.1	116.2	156.2	40.0

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