爆炸作用下综合管廊燃气舱内同舱管道失效的影响因素

米红甫; 彭冲; 张小梅; 汪阳; 王莉莉; 杨雪; 蒋新生

doi:10.11858/gywlxb.20210891

爆炸作用下综合管廊燃气舱内同舱管道失效的影响因素

doi: 10.11858/gywlxb.20210891

米红甫^{1, 2,},
彭冲^{1, 2,*, ,},
张小梅^{1, 2},
汪阳^{1, 2},
王莉莉^{1, 2},
杨雪^{1, 2},
蒋新生³

1.
重庆科技学院安全工程学院, 重庆　401331
2.
重庆市安全生产科学研究院, 重庆　401331
3.
陆军勤务学院, 重庆　401331

基金项目: 国家自然科学基金（51704054）；重庆市自然科学基金（cstc2019jcyj-msxmX0462）；重庆市教委科技研究计划（KJQN201801531）；重庆科技学院硕士研究生创新计划（YKJCX2020712）；陆军勤务学院油料系火灾与爆炸安全防护实验室开放基金（LQ21KFJJ08）

详细信息

作者简介:
米红甫（1986－），男，博士，副教授，主要从事地下空间火灾及油气爆炸安全防护研究.E-mail：mimihh5@163.com

通讯作者:
彭　冲（1993－），男，硕士，主要从事地下空间火灾及油气爆炸安全防护研究.E-mail：1904202042@qq.com

中图分类号: O389; X932
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出版历程
- 收稿日期: 2021-10-12
- 修回日期: 2021-10-29
- 刊出日期: 2022-05-30

Influence Factors of the Failure of Adjacent Pipeline under Explosion in Gas Compartment of Utility Tunnel

MI Hongfu^{1, 2
,},
PENG Chong^{1, 2,*
, ,},
ZHANG Xiaomei^{1, 2},
WANG Yang^{1, 2},
WANG Lili^{1, 2},
YANG Xue^{1, 2},
JIANG Xinsheng³

1.
College of Safety Engineering, Chongqing University of Science and Technology, Chongqing 401331, China
2.
Chongqing Academy of Safety Science and Technology, Chongqing 401331, China
3.
Army Logistics Academy of PLA, Chongqing 401331, China

摘要

摘要: 为研究综合管廊燃气舱内天然气爆炸时预混气体长度、管道间距、管道壁厚和管道屈服强度4种因素对同舱管道失效的影响规律和影响程度，采用非线性有限元软件ANSYS/LS-DYNA，根据实际案例建立燃气舱三维模型，基于应变的失效判定标准，获取同舱管道的椭圆度变化情况。结果表明：天然气爆炸作用下，同舱管道的椭圆度与预混气体长度正相关，与管道壁厚和管道屈服强度负相关；同舱管道椭圆度与管道间距先负相关后正相关，该燃气舱内最优管道安全间距为0.74 m；管道屈服强度对同舱管道椭圆度的影响程度最小；当影响因素的变化率在1%～12%、13%～18%和19%～25% 3个区间时，对同舱管道椭圆度影响最大的因素分别为预混气体长度、管道壁厚和管道间距。研究结论可为综合管廊燃气舱的设计提供参考。
- 综合管廊 /
- 燃气舱 /
- 天然气爆炸 /
- 管道 /
- 椭圆度
Abstract: In order to study the influence law and degree of premixed gas length, pipeline spacing, pipeline thickness and pipeline yield strength on the failure of the adjacent pipeline under the action of natural gas explosion in the gas compartment of the utility tunnel, a three-dimensional model of the gas compartment is established based on the actual case by using the nonlinear finite element software ANSYS/LS-DYNA to obtain the ovality change of the adjacent pipeline. The results show that under the action of natural gas explosion, the ovality of the adjacent pipeline is positively correlated with the length of premixed gas, and negatively correlated with the thickness and yield strength of the pipeline; the ovality of the adjacent pipeline is negatively correlated first and then positively correlated with the pipeline spacing, the safest pipeline spacing in this gas compartment is 0.74 m; the yield strength of the pipeline has the least influence on the ovality of the adjacent pipeline; the change rate of influencing factors is in the range of 1%–12%, 13%–18% and 19%–25%, the factors that have the greatest influence on the ovality of the adjacent pipeline are the length of premixed gas, pipeline thickness and pipeline spacing. This research can provide a reference for the design of the gas compartment in the utility tunnel.
- utility tunnel /
- gas compartment /
- gas explosion /
- pipeline /
- ovality

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图 1 燃气舱截面图（单位：mm）

Figure 1. Section view of the gas compartment (Unit: mm)

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图 2 有限元模型

Figure 2. Finite element model

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图 3 监测点

Figure 3. Monitoring points

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图 4 实验模型（单位：mm）

Figure 4. Experimental model (Unit: mm)

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图 5 计算结果与实验结果的对比

Figure 5. Comparison of calculated and experimental results

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图 6 等效应力云图

Figure 6. Von Mises stress nephograms

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图 7 管道截面1的变形情况

Figure 7. Pipeline deformation of section 1

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图 8 预混气体长度对管道椭圆度的影响

Figure 8. Effect of premixed gas length on pipeline’s ovality

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图 9 管道间距对管道椭圆度的影响

Figure 9. Effect of pipeline spacing on pipeline’s ovality

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图 10 管道壁厚和管道屈服强度对管道椭圆度的影响

Figure 10. Effects of pipeline thickness and pipeline yield strength on pipeline’s ovality

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图 11 敏感性分析

Figure 11. Sensitivity analysis

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表 1 工况设置^{[2, 15]}

Table 1. Working condition setting^{[2, 15]}

Group	Working condition	Premixed gas size			a/m	h/mm	σ_s/MPa
Group	Working condition	Length/m	Width/m	Height/m	a/m	h/mm	σ_s/MPa
a	Ⅰ	3.0	2.0	3.2	0.5	4.8	245
	Ⅱ	2.8	2.0	3.2	0.5	4.8	245
	Ⅲ	2.6	2.0	3.2	0.5	4.8	245
	Ⅳ	2.4	2.0	3.2	0.5	4.8	245
	Ⅴ	2.2	2.0	3.2	0.5	4.8	245
	Ⅵ	2.0	2.0	3.2	0.5	4.8	245
b	Ⅰ	3.0	2.0	3.2	0.5	4.8	245
	Ⅱ	3.0	2.0	3.2	0.6	4.8	245
	Ⅲ	3.0	2.0	3.2	0.7	4.8	245
	Ⅳ	3.0	2.0	3.2	0.8	4.8	245
	Ⅴ	3.0	2.0	3.2	0.9	4.8	245
	Ⅵ	3.0	2.0	3.2	1.0	4.8	245
c	Ⅰ	3.0	2.0	3.2	0.5	4.8	245
	Ⅱ	3.0	2.0	3.2	0.5	6.0	245
	Ⅲ	3.0	2.0	3.2	0.5	7.0	245
	Ⅳ	3.0	2.0	3.2	0.5	8.0	245
	Ⅴ	3.0	2.0	3.2	0.5	9.0	245
	Ⅵ	3.0	2.0	3.2	0.5	10.0	245
d	Ⅰ	3.0	2.0	3.2	0.5	4.8	245
	Ⅱ	3.0	2.0	3.2	0.5	4.8	290
	Ⅲ	3.0	2.0	3.2	0.5	4.8	320
	Ⅳ	3.0	2.0	3.2	0.5	4.8	360
	Ⅴ	3.0	2.0	3.2	0.5	4.8	390

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表 2 甲烷-空气预混气体的材料参数

Table 2. Material parameters of the methane-air premixed gas

Density/ （kg·m⁻³）	Ratio of specific heat	Detonation velocity/ （km·s⁻¹）	Explosion pressure/MPa	Instantaneous explosion pressure/MPa	Initial internal energy/（MJ·m⁻³）
1.234	1.274	1.855	1.87	0.935	3.408

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表 3 天然气管道材料参数

Table 3. Material parameters of natural gas pipeline

Density/(g·cm⁻³)	Elastic modulus/GPa	Poisson’s ratio	C	P
7.85	206	0.3	40.4	5

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