Multi-level grey dynamic evaluation of external corrosion of pipelines based on cooperative game

doi:10.11949/j.issn.0438-1157.20181087

Abstract

Abstract:

The external corrosion evaluation of the pipeline can provide a basis for the optimization of the pipeline inspection and maintenance program. Considering the complexity and uncertainty and timeliness of factors of external corrosion of buried pipelines, the grey relational analysis method was introduced to pipeline corrosion evaluation field, so as to propose a multi-level grey dynamic evaluation of external corrosion of pipelines based on cooperative game. Firstly, an evaluation index system of external corrosion of pipelines, in which the soil corrosion, external coating performance, cathodic protection system and stray current interference were included, was established. The subjective weights of the indexes obtained from expert qualitative analysis were quantified by applying improved analytic hierarchy process based on group decision-making. The objective weights of indexes were obtained by detecting real-time data information. After getting the two weights, the synthetic weight of each index was obtained by cooperative game. The dynamic multi-level grey evaluation was established which can be used to determining the risk grade of external corrosion of buried pipelines to be measured. The performance of the proposed method was tested on the practical example about corroded buried pipeline in a certain area. The effectiveness and reasonableness of the constructed model was validated.

Key words: pipeline, corrosion, cooperative game, grey relational analysis, safety, optimization

摘要：

对管道进行外腐蚀评价可以为管道检维修方案的优化提供依据。考虑到埋地管道外腐蚀影响因素的复杂性、不确定性和时效性，将灰关联分析法引入管道安全评价领域，提出了一种基于合作博弈的管道外腐蚀多层次灰色动态评价方法。首先建立包含土壤腐蚀性、防腐层性能、阴极保护有效性和杂散电流干扰强度4个方面的腐蚀综合评价指标体系，再基于群决策的改进层次分析法确定指标主观权重，综合实时检测客观数据信息得到指标客观权重，两种权重通过基于合作博弈的组合赋权确定指标组合权重，在此基础上构建动态的多层次灰色评价方法模型。以某地区埋地管道检测数据验证了所建方法和模型的有效性和合理性。

关键词: 管道, 腐蚀, 合作博弈, 灰关联分析, 安全, 优化

CLC Number:

TG 172

Xingguo LEI, Qingfeng WANG, Zhong LI. Multi-level grey dynamic evaluation of external corrosion of pipelines based on cooperative game[J]. CIESC Journal, 2019, 70(6): 2386-2396.

雷兴国, 王庆锋, 李中. 基于合作博弈的管道外腐蚀多层次灰色动态评价[J]. 化工学报, 2019, 70(6): 2386-2396.

Figures/Tables 9

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测点	B₁									B₂				B₃	B₄
测点	C₁₁/ (Ω·m)	C₁₂/ mV	C₁₃/ mV	C₁₄	C₁₅/ %	C₁₆/ %	C₁₇/ %	C₁₈/ %		C₂₁/ (dB·km^-1)	C₂₂/ (kΩ·m²)			C₃₁/ V	C₄₁/ mV	C₄₂/ V
1	6.36	-625	324	8.67	11.79	0.32	0.11	1.26	33			0.10	-0.933		38	0.038
2	3.77	-624	325	8.36	10.24	0.45	0.31	2.28	31			0.10	-1.034		20	0.012
3	5.65	-618	315	8.82	15.31	0.35	0.12	1.40	32			0.10	-1.038		55	0.075
4	8.92	-603	319	8.68	16.75	0.45	0.21	1.98	31			0.10	-1.077		503	0.235
5	2.89	-637	315	8.84	13.65	0.32	0.20	1.55	31			2.60	-0.570		89	0.017
6	9.42	-521	333	7.68	14.25	0.05	0.05	0.32	52			1.70	-1.200		—	—
7	12..53	-462	367	7.85	13.78	0.11	0.11	0.37	38			0.10	-0.900		—	—

测点	B₁									B₂				B₃	B₄
测点	C₁₁/ (Ω·m)	C₁₂/ mV	C₁₃/ mV	C₁₄	C₁₅/ %	C₁₆/ %	C₁₇/ %	C₁₈/ %		C₂₁/ (dB·km^-1)	C₂₂/ (kΩ·m²)			C₃₁/ V	C₄₁/ mV	C₄₂/ V
1	6.36	-625	324	8.67	11.79	0.32	0.11	1.26	33			0.10	-0.933		38	0.038
2	3.77	-624	325	8.36	10.24	0.45	0.31	2.28	31			0.10	-1.034		20	0.012
3	5.65	-618	315	8.82	15.31	0.35	0.12	1.40	32			0.10	-1.038		55	0.075
4	8.92	-603	319	8.68	16.75	0.45	0.21	1.98	31			0.10	-1.077		503	0.235
5	2.89	-637	315	8.84	13.65	0.32	0.20	1.55	31			2.60	-0.570		89	0.017
6	9.42	-521	333	7.68	14.25	0.05	0.05	0.32	52			1.70	-1.200		—	—
7	12..53	-462	367	7.85	13.78	0.11	0.11	0.37	38			0.10	-0.900		—	—

指标	评价指标取值的等级划分
指标	Ⅰ	Ⅱ	Ⅲ	Ⅳ	Ⅴ
C₁₁/(Ω·m)	> 200	50—200	15—50	5—15	< 5
C₁₂/mV	>-150	-150—-300	-300—-450	-450—-550	< -550
C₁₃/mV	> 400	300—400	200—300	100—200	< 100
C₁₄	8.5—10	7.0—8.5	5.5—7.0	4.5—5.5	< 4.5
C₁₅/%	< 3	3—7	7—10	10—12	12—25
C₁₆/%	< 0.01	0.01—0.05	0.05—0.10	0.10—0.75	> 0.75
C₁₇/%	< 0.01	0.01—0.04	0.04—0.08	0.08—0.65	> 0.65
C₁₈/%	< 0.05	0.05—0.15	0.15—0.35	0.35—0.75	> 0.75
C₂₁/(dB·km^-1)	< 20	20—30	30—35	35—50	> 50
C₂₂/(kΩ·m²)	> 10	5—10	3—5	1—3	< 1
C₃₁/V	< -1.5	-0.95—-1.5	-0.9—-0.95	-0.85—-0.9	> -0.85
C₄₁/mV	< 20	20—60	60—100	100—200	>200
C₄₂/V	< 4	4—6	6—10	10—20	> 20

指标	评价指标取值的等级划分
指标	Ⅰ	Ⅱ	Ⅲ	Ⅳ	Ⅴ
C₁₁/(Ω·m)	> 200	50—200	15—50	5—15	< 5
C₁₂/mV	>-150	-150—-300	-300—-450	-450—-550	< -550
C₁₃/mV	> 400	300—400	200—300	100—200	< 100
C₁₄	8.5—10	7.0—8.5	5.5—7.0	4.5—5.5	< 4.5
C₁₅/%	< 3	3—7	7—10	10—12	12—25
C₁₆/%	< 0.01	0.01—0.05	0.05—0.10	0.10—0.75	> 0.75
C₁₇/%	< 0.01	0.01—0.04	0.04—0.08	0.08—0.65	> 0.65
C₁₈/%	< 0.05	0.05—0.15	0.15—0.35	0.35—0.75	> 0.75
C₂₁/(dB·km^-1)	< 20	20—30	30—35	35—50	> 50
C₂₂/(kΩ·m²)	> 10	5—10	3—5	1—3	< 1
C₃₁/V	< -1.5	-0.95—-1.5	-0.9—-0.95	-0.85—-0.9	> -0.85
C₄₁/mV	< 20	20—60	60—100	100—200	>200
C₄₂/V	< 4	4—6	6—10	10—20	> 20

准则层指标	权重	指标层指标	数据 (无量纲化)	专家打分	权重		关联系数
准则层指标	权重	指标层指标	数据 (无量纲化)	专家打分	权重		Ⅰ	Ⅱ	Ⅲ	Ⅳ	Ⅴ
B₁	0.2634	C₁₁	0.0212	0.19	0.2038		0.4239	0.7656	0.9428	1.0000	0.9905
		C₁₂	0.0000	0.09	0.0965		0.3878	0.4872	0.6552	0.8507	1.0000
		C₁₃	0.6480	0.05	0.0409		0.7576	1.0000	0.9082	0.6570	0.5146
		C₁₄	0.8670	0.18	0.1290		1.0000	0.9654	0.7399	0.5997	0.5325
		C₁₅	0.5284	0.22	0.2783		0.5746	0.7126	0.8690	1.0000	0.9826
		C₁₆	0.6800	0.09	0.0484		0.6051	0.6376	0.6835	1.0000	0.5249
		C₁₇	0.8900	0.03	0.0399		0.8247	0.8716	0.9406	1.0000	0.4680
		C₁₈	0.0000	0.15	0.1633		0.3333	0.3585	0.4222	0.6552	1.0000
B₂	0.5638	C₂₁	0.4500	0.44	0.0764		0.5332	0.8319	1.0000	0.8813	0.4662
B₂	0.5638	C₂₂	0.0050	0.56	0.9236		0.3333	0.5025	0.6306	0.8462	1.0000
B₃	0.1178	C₃₁	0.4665	1.00	1.0000		0.3333	0.9434	1.0000	0.8957	0.7735
B₄	0.0550	C₄₁	0.8480	0.67	0.6656		0.8472	1.0000	0.8194	0.6168	0.3812
B₄	0.0550	C₄₂	0.9985	0.33	0.3344	1.0000		0.7158	0.6260	0.5005	0.3333