全尺寸干线输气管道爆炸地振动的空间分布和时频分布特性

马华原; 龙源; 李兴华; 钟明寿; 周辉; 吴建源

doi:10.11883/bzycj-2018-0123

全尺寸干线输气管道爆炸地振动的空间分布和时频分布特性

doi: 10.11883/bzycj-2018-0123

1.
陆军工程大学，江苏南京 210007
2.
白城兵器试验中心，吉林白城 137000
3.
中国人民解放军75833部队，广州广东 510000

基金项目: 国家自然科学基金（11672331，51608530）

详细信息

作者简介:
马华原（1992－　），男，博士研究生，503812350@qq.com

通讯作者:
龙　源（1958－　），男，博士，教授，914800684@qq.com

中图分类号: O384
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- 被引次数: 0
出版历程
- 收稿日期: 2018-04-13
- 修回日期: 2018-06-01
- 网络出版日期: 2019-04-25
- 刊出日期: 2019-04-01

Characteristics of space and time-frequency distribution of the vibration in full-scale trunk gas pipeline explosion

1.
Army Engineering University of PLA, Nanjing 210007, Jiangsu, China
2.
Baicheng Ordnance Test Center, Baicheng 137000, Jilin, China
3.
75833 Army of the PLA, Guangdong 510000, Guangzhou, China

摘要

摘要: 针对第三代大输量天然气管道爆炸振动危害效应展开研究，组织实施了全尺寸天然气管道爆炸试验。经数据分析发现，天然气管道爆炸地振动的衰减更加符合指数分布而非传统幂率分布，且其振动强度在空间内分布不均匀，存在特定方向振动加强的现象。采用改进型的MP-WVD算法分析得到天然气管道爆炸地振动的时频特性，其振动的主要频率范围为10～20 Hz，持续时间为0.1～0.2 s。存在多次加载特性，瑞利波成分强于勒夫波成分。研究成果可为后续管道施工安全设计以及事故现场勘测提供参考。
- 管道爆炸 /
- 指数衰减 /
- 振动时频特性 /
- 安全设计
Abstract: In this paper we investigated the damaging effect resulting from the vibration of pipeline gas explosion using a full-scale pipeline gas explosion test and, after data analysis, found that the attenuation of the pipeline vibration was more in line with the exponential distribution than with the classical power law distribution, and that the vibration intensity was not evenly distributed in the space, with a vibration enhancement in a specific direction. Adopting the improved MP-WVD algorithm, we also analyzed the time-frequency characteristics of the vibration in pipeline explosion and found that the main frequency range of vibration was 10−20 Hz, with a duration of 0.1−0.2 s as well as a multiple loading. Finally, we observed that the Rayleigh wave was stronger than the Love wave. These results can serve as reference for pipeline construction and accident investigation.
- pipeline explosion /
- exponential decay /
- time frequency characteristics of vibration /
- safety design

HTML全文

图 1 天然气管道爆炸事故

Figure 1. Pipeline gas explosion accidents

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图 2 试验场

Figure 2. Test field

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图 3 测点布设方案

Figure 3. Layout scheme of measuring points

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图 4 爆炸瞬间及爆后管道

Figure 4. Explosions and pipeline affected

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图 6 拟合效果对比

Figure 6. Comparison of fitted effects

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图 5 振动峰值分布图

Figure 5. Peak vibration distribution diagram

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图 7 振动场三维拟合效果图

Figure 7. 3D fitting diagram of vibration field

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图 8 1#测点振动信号时频分布

Figure 8. Time frequency distribution of measuring point 1#

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图 9 7#测点振动信号时频分布

Figure 9. Time frequency distribution of measuring point 7#

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图 10 13#测点振动信号时频分布

Figure 10. Time frequency distribution of measuring point 13#

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图 11 19#测点振动信号时频分布

Figure 11. Time frequency distribution of measuring point 19#

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图 12 频率边际谱

Figure 12. Marginal spectrum

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图 13 质点位移

Figure 13. Particle displacement

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表 4 0° 测线振动速度

Table 4. Data of vibration velocity of measuring line 0°

测点	l/m	V_X/(cm·s⁻¹)	f_X/Hz	V_Y/(cm·s⁻¹)	f_Y/Hz	V_Z/(cm·s⁻¹)	f_Z/Hz	V/(cm·s⁻¹)
19#	20	7.99	27.5	4.33	29.2	5.03	18.9	9.33
20#	30	3.13	26.1	3.03	21.3	6.91	18.2	7.34
21#	40	1.73	22.2	1.63	12.8	4.15	13.6	4.22
22#	60	1.03	18.2	0.85	18.3	1.13	14.2	1.16
23#	90	0.78	17.5	0.61	13.6	0.95	13.7	0.54

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表 1 90° 测线振动速度

Table 1. Data of vibration velocity of measuring line 90°

测点	l/m	V_X/(cm·s⁻¹)	f_X/Hz	V_Y/(cm·s⁻¹)	f_Y/Hz	V_Z/(cm·s⁻¹)	f_Z/Hz	V/(cm·s⁻¹)
1#	20	7.14	8.3	6.32	8.2	9.05	15.3	13.15
2#	30	5.32	8.0	5.15	8.6	7.85	16.2	10.79
3#	40	2.95	8.1	3.17	58.5	5.39	18.9	7.60
4#	60	1.44	8.0	2.37	60.4	2.31	15.4	3.57
5#	90	2.58	7.9	1.85	7.9	3.94	13.8	1.90
6#	130	−	−	−	−	−	−	−

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表 3 30° 测线振动速度

Table 3. Data of vibration velocity of measuring line 30°

测点	l/m	V_X/(cm·s⁻¹)	f_X/Hz	V_Y/(cm·s⁻¹)	f_Y/Hz	V_Z/(cm·s⁻¹)	f_Z/Hz	V/(cm·s⁻¹)
13#	20	8.46	15.5	6.96	15.2	6.56	22.9	11.86
14#	30	3.19	18.1	1.82	23.5	9.46	15.1	9.68
15#	40	2.54	17.5	0.91	16.7	5.43	20.3	6.52
16#	60	1.32	20.1	0.99	8.8	2.22	16.1	2.79
17#	90	0.85	16.6	0.75	18.0	1.40	19.7	1.53
18#	130	0.36	19.1	0.38	17.3	0.54	17.9	0.65

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表 2 60° 测线振动速度

Table 2. Data of vibration velocity of measuring line 60°

测点	l/m	V_X/(cm·s⁻¹)	f_X/Hz	V_Y/(cm·s⁻¹)	f_Y/Hz	V_Z/(cm·s⁻¹)	f_Z/Hz	V/(cm·s⁻¹)
7#	−20	5.37	8.0	4.58	61.2	8.77	13.7	9.01
8#	−30	4.33	17.7	3.71	60.6	7.92	14.0	6.31
9#	−40	4.76	16.8	2.41	16.0	2.41	13.8	5.17
10#	−60	1.35	13.5	1.09	7.9	0.81	20.2	1.50
11#	−90	1.00	12.0	0.74	8.3	1.08	16.8	1.32
12#	130	−	−	−	−	−	−	−

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