基于灰色关联分析和IAHP的CNG加气站安全评价方法研究

建立了压缩天然气(CNG)加气站安全评价的指标体系和安全等级的评分标准,运用改进的层次分析法(IAHP)计算CNG加气站安全指标权重序列,运用灰色关联法计算参评序列与标准序列的关联度。最大关联度所对应的标准向量等级,即为CNG加气站所属的安全等级。IAHP采用"三标度"法确定判断矩阵,相对于层次分析法中的"九标度"法来说,更易于保持矩阵的一致性。应用笔者提出的理论与方法,对北京某CNG加气站的实际案例计算,验证该方法的有效性。计算结果表明:售气系统安全、气体储存和压缩系统安全、人员的违章操作情况、司机或加气站人员是否在站内抽烟、站内设施与站外建筑物防火距离等是CNG加气站安全的主要影响因素,应对其进行重点管理。

Study on Safety Evaluation of CNG Filling Station Based on the Grey Correlation Method and IAHP

The safety index system and the grading criterion for the safety assessment of CNG(compressed natural gas) filling station are established.The IAHP(improved analytic hierarchy process) is used to ascertain the weight sequence of CNG filling station's safety indexes.The grey correlation method is used to calculate the correlation degree between the given sequence and the standard sequence.The vector quantity corresponding to the maximum correlation degree is the safety degree of the CNG filling station.The IAHP uses "three scales" method to form the judging matrix.Compared with the "nine scales" method of AHP,the IAHP is easier to make the matrix consistent.Based on the theories and methods mentioned in the paper,a CNG filling station in Beijing is given as a calculation example to validate the method's effectiveness.The result shows that the safety of the gas selling system,gas storage and compressing system,the workers' operation against the rules,the drivers' smoking action in the CNG filling station,and the fire prevention distance are the major affecting factors for the safety of the CNG filling station,to which more attentions should be paid.