有机玻璃-空气层结构对爆炸水池水下爆炸地基振动的影响

汪泉; 汤有富; 李志敏; 宫婕; 程扬帆; 刘上豪; 李成孝

doi:10.11858/gywlxb.20170611

有机玻璃-空气层结构对爆炸水池水下爆炸地基振动的影响

doi: 10.11858/gywlxb.20170611

汪泉^{1, 2,},
汤有富^{1, 3},
李志敏¹,
宫婕¹,
程扬帆¹,
刘上豪¹,
李成孝¹

1.
安徽理工大学化学工程学院, 安徽淮南 232001
2.
安徽理工大学土木工程博士后流动站, 安徽淮南 232001
3.
浙江物产光华民爆器材有限公司, 浙江衢州 324400

基金项目:

国家自然科学基金 11502001

中国博士后基金面上项目 2014M561808

安徽省博士后基金项目 2014B035

详细信息

作者简介:
汪泉(1980—), 男, 博士, 副教授, 主要从事爆炸力学研究.E-mail:wqaust@163.com

中图分类号: O383.1
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出版历程
- 收稿日期: 2017-07-06
- 修回日期: 2017-07-18

Influence of Plexiglass-Air Interlayer Structure on Foundation Vibration of Small Pool Underwater Explosion

1.
School of Chemical Engineering, Anhui University of Science and Technology, Huainan 232001, China
2.
Postdoctoral Research Station of Civil Engineering, Anhui University of Science and Technology, Huainan 232001, China
3.
Zhejiang Guanghua Property Blasting Equipment Company Limited, Quzhou 324400, China

摘要

摘要: 为了研究有机玻璃-空气层结构对水下爆炸振动的影响, 采用NUBOX-6016爆破振动测试仪监测小水池(直径5.5 m、高3.62 m)中该结构下水下爆炸引起的地基振动信号, 研究不同空气层厚度对最大振动速度的影响; 基于Matlab软件编写相关程序对测得的振动信号进行Hilbert-Huang变换(HHT), 分析不同空气层厚度对振动信号全局频率的影响。结果表明:对于有机玻璃-空气层结构, 随着空气层厚度的增加, 最大振动速度呈先减小后增大的趋势, 当空气层厚度为120 mm时隔振效果最佳; 通过对振动信号的HHT分析得到全局频率所对应的幅值, 5~15 Hz低频区间段的幅值衰减较明显, 且振动作用时间缩短, 能够有效防止水下爆炸与建/构筑物之间产生共振现象。所得试验结果及分析对水下爆破工程防护及军事舰艇防雷仓结构设计等具有一定参考价值。
- 水下爆炸 /
- 有机玻璃-空气层结构 /
- 爆炸振动 /
- Hilbert-Huang变换
Abstract: To study the influence of the plexiglass-air interlayer structure on underwater explosion vibration, the foundation vibration signals for this structure caused by underwater explosion in the small pool (5.5 m in diameter and 3.62 m in height), the influence of different air interlayer thicknesses on the maximum vibration velocity was studied, HHT (Hilbert-Huang Transform) was used to analyze the vibration test signals by writing relevant programs based on Matlab software, studying the influence of different air interlayer thickness on the global frequency of vibration signals.Experimental results show that:under the condition of plexiglass-air interlayer structure, with the increase of air interlayer thickness, the maximum vibration velocity decreases first and then increases, and the vibration isolation effect is the best when the thickness is 120 mm.The amplitude corresponding to the global frequency can be obtained by means of HHT analysis, the amplitude attenuation of the 5-15 Hz low frequency section is obvious, the action time is shortened, which can effectively prevent the resonance phenomenon between the building and structure.The experimental results and analysis have certain theoretical reference value for underwater blasting engineering protection and structural design of lightning protection bunker for military ship.
- underwater explosion /
- plexiglass-air interlayer structure /
- explosion vibration /
- Hilbert-Huang transform

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图 1 有机玻璃-空气层结构

Figure 1. Picture of plexiglass-air interlayer structure

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图 2 振动测试系统(1.爆炸水池; 2.固定架; 3.8号标准雷管; 4.空气隔层; 5.发爆器; 6.1^#、2^#、3^#测振仪)

Figure 2. Vibration test system (1.Explosion pool; 2.Fixed mount; 3.Detonator; 4.Air interlayer; 5.Initiator; 6.1^#, 2^#, 3^# vibration measurer)

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图 3 不同厚度空气层对各测点振速的影响

Figure 3. Influence of different thicknesses of air interlayer on vibration velocity

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图 4 不同厚度水隔层对各测点振速的影响

Figure 4. Influence of different thicknesses of water interlayer on vibration velocity

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图 5 原始振动信号

Figure 5. Original vibration signal

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图 6 EMD分解后得到各IMF分量

Figure 6. IMF components by EMD decomposition

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图 7 1 m处充80 mm水隔层垂向振动Hilbert谱

Figure 7. Vertical vibration Hilbert spectrum of the 80 mm water-filled interlayer at 1 m

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图 8 不同空气层厚度条件下的垂向振动Hilbert谱

Figure 8. Hilbert spectrum of vertical vibration of different thicknesses of air interlayer

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表 1 不同距离、不同厚度空气层对水下爆炸振动的影响

Table 1. Influence of distances and thickness of air interlayer on underwater explosion vibration

Distance/m	Direction	Main vibration frequency/Hz				Maximum vibration velocity/(cm·s^-1)
Distance/m	Direction	∅40 mm	∅80 mm	∅120 mm	∅160 mm	∅40 mm	∅80 mm	∅120 mm	∅160 mm
1	z	56.763	56.763	56.763	56.763	0.086	0.070	0.054	0.070
2	z	56.763	56.763	56.763	44.556	0.118	0.097	0.082	0.101
3	z	56.763	56.763	56.763	56.763	0.080	0.071	0.061	0.086

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表 2 不同距离、不同厚度水隔层对水下爆炸振动的影响

Table 2. Influence of distances and thickness of water interlayer on underwater explosion vibration

Distance/m	Direction	Main vibration frequency/Hz				Maximum vibration velocity/(cm·s^-1)
Distance/m	Direction	∅40 mm	∅80 mm	∅120 mm	∅160 mm	∅40 mm	∅80 mm	∅120 mm	∅160 mm
1	z	62.256	62.256	62.256	56.763	0.086	0.169	0.184	0.185
2	z	62.256	62.256	62.256	62.256	0.155	0.145	0.160	0.161
3	z	62.256	62.256	62.256	62.256	0.101	0.097	0.107	0.116

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表 3 信号经EMD分解后相关参数

Table 3. Related parameters of the signal by EMD decomposition

IMF	Variance	Proportion/%
C₁	0	1.646 3
C₂	0	0.862 9
C₃	0	0.626 8
C₄	0.000 1	70.307 9
C₅	0	20.200 7
C₆	0	2.208 9
C₇	0	1.254 8
C₈	0	1.081 4
C₉	0	1.719 6
C₁₀	0	0.015 0
C₁₁	0	0.060 6
C₁₂	0	0.015 0

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