Risk evaluation of submarine pipelines in FMEA by combination of gray relation projection and VIKOR method.

Submarine pipelines are crucial to the safe and efficient transportation of offshore oil and gas, and conducting risk assessments is pivotal to mitigating the potential hazards associated with submarine pipelines and ensuring their safety. This paper proposes a comprehensive risk assessment model based on the expanded Failure Mode and Effect Analysis (FMEA) framework by incorporating the gray relational projection method and the compromise ranking method (GRP-VIKOR). The proposed GRP-VIKOR model combines the compromise rationality of VIKOR with the comprehensive indicator relationship evaluation of the gray relational projection method to effectively enhance the reliability and precision of the risk assessments. Initially, the risk structure of submarine pipelines is outlined, and an elaborate one and two-level evaluation index system for submarine pipeline failure risk assessment is established using the expanded FMEA, which ensures the precision and rigor of the risk assessment framework. In the data processing segment of GRP-VIKOR, interval type-2 fuzzy sets (IT2FSs) are employed to represent expert judgment language, thus augmenting the capability of the model to describe uncertainty. The introduction of the gray relational projection method combines gray correlation numbers with positive and negative ideal solutions, thus addressing deviations in the VIKOR method related to the judgment of alternative solutions with similar degrees of proximity to positive and negative ideal solutions. In the weight assignment segment of GRP-VIKOR, cooperative game theory is utilized, integrating three weight assignment methods to enhance the accuracy of indicator weights, effectively resolving issues associated with the dominance of a single method in the multi-attribute evaluation weight assignment. Finally, the risk priority of failure factors is determined through the analysis of actual submarine pipeline data and comparative analyses of different model results and parameter sensitivities. The experimental results demonstrate that the model accurately analyzes risk priorities, offering effective theoretical support for the field of submarine pipeline safety assessment. Submarine pipelines are crucial to the safe and efficient transportation of offshore oil and gas, and conducting risk assessments is pivotal to mitigating the potential hazards associated with submarine pipelines and ensuring their safety. This paper proposes a comprehensive risk assessment model based on the expanded Failure Mode and Effect Analysis (FMEA) framework by incorporating the gray relational projection method and the compromise ranking method (GRP-VIKOR). The proposed GRP-VIKOR model combines the compromise rationality of VIKOR with the comprehensive indicator relationship evaluation of the gray relational projection method to effectively enhance the reliability and precision of the risk assessments. Initially, the risk structure of submarine pipelines is outlined, and an elaborate one and two-level evaluation index system for submarine pipeline failure risk assessment is established using the expanded FMEA, which ensures the precision and rigor of the risk assessment framework. In the data processing segment of GRP-VIKOR, interval type-2 fuzzy sets are employed to represent expert judgment language, thus augmenting the capability of the model to describe uncertainty. The introduction of the gray relational projection method combines gray correlation numbers with positive and negative ideal solutions, thus addressing deviations in the VIKOR method related to the judgment of alternative solutions with similar degrees of proximity to positive and negative ideal solutions. In the weight assignment segment of GRP-VIKOR, cooperative game theory is utilized, integrating three weight assignment methods to enhance the accuracy of indicator weights, effectively resolving issues associated with the dominance of a single method in the multi-attribute evaluation weight assignment. Finally, the risk priority of failure factors is determined through the analysis of actual submarine pipeline data, and comparative analyses of different model results and parameter sensitivities. The experimental results demonstrate that the model accurately analyzes risk priorities, offering effective theoretical support for the field of submarine pipeline safety assessment. [Display omitted] • An extended FMEA structure is used to construct a risk assessment indicator system. • This paper proposes a risk assessment model based on the combination of the gray relational projection method and VIKOR. • The proposed GRP-VIKOR model is applied to submarine pipeline risk assessment problems. [ABSTRACT FROM AUTHOR]