基于组合赋权-正态云的大坝安全评价模型

Dam Safety Evaluation Based on Combination Weight and Normal Cloud Model

针对大坝安全评价问题,提出了一种基于组合赋权和正态云耦合的安全评价模型。选取变形、渗流、环境因素为大坝安全评价指标体系,根据既定评价指标体系确定大坝安全评价标准,在此基础上确定云模型的特征参数和各评价指标的综合权重,由云模型正向发生器给出评价指标在各评价等级下的隶属度,最后由各评价指标的综合权重矩阵和对应评价等级下的隶属度矩阵得出大坝安全评价结果。运用该模型对某大坝进行了安全评价,结果表明,该方法可以得出准确的结果。

A model based on combination weight method and normnal cloud model had been established to evaluate the risk degree of dam. Three assessment indexes were considered,namely,deformation risk,seepage risk and environmental risk in the process of safety evaluation of dam . The parameters of cloud model and safety evaluation of damrisk grade were calculated with the chosen assessment indicators,mem -bership matrix of assessment indicators had been generated by normal cloud model generator based on dam monitoring data and the combina-tion weight method was used to compute the assessment indicator5 s comprehensive weights. Finally,the membership of dam under each safe-ty evaluation grade was computed by weight matrix and membership matrix of assessment indicators. The results show that this method can reach a better evaluation conclusion.