In order to solve the problems of inaccurate failure priority ranking and excessively subjective risk evaluation in traditional FMEA,a risk evaluation method of oil and gas pipeline failure modes based on a hybrid weights-cloud model was proposed. Firstly,the failure modes and causes of oil and gas pipelines were investigated and analyzed,and the systematic FMEA mode was constructed. Then an expert evaluation opinion processing method was proposed based on the cloud model and the hybrid weight method. The game theory was introduced to reduce the subjectivity and randomness of the evaluation results. Finally,VIKOR was used to rank the risk of each failure mode. The feasibility and accuracy of this method was verified by comparing with the traditional FMEA method. The results show that the method can comprehensively assess the risk factors of pipeline sections,quantify the risk values of different pipeline sections and identify the most important failure modes of the same pipeline section,realizing the effective positioning of pipeline high-risk areas and the ranking of the risk factors of pipeline sections.
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |