投影寻踪法在泵站建筑物安全评价中的应用

为了评价在役泵站工程建筑物安全状况,建立了泵站工程建筑物安全评价指标体系.对安全评价指标重要性进行分析,着重分析了泵站工程建筑物安全评价客观赋权方法之一的投影寻踪方法.根据泵站工程建筑物安全评价指标的实测值求计算数据,通过投影寻踪法模型计算并联系基于遗传算法的投影寻踪计算原理分析计算结果.利用江苏省某泵站作为实例,对影响泵站建筑物安全状态各指标层指标重要性进行分析,分别对混凝土结构安全状态和站身稳定安全状态2个指标层进行了研究.利用投影寻踪计算模型分析各指标层下各评价指标重要性,应用Matlab自带的遗传算法工具箱进行具体计算.计算结果表明,此泵站混凝土结构安全状态指标层中混凝土实测强度最为重要,而泵站站身稳定安全指标层中站身抗滑稳定这一指标权重最大.

Application of projection pursuit method in pumping station safety evaluation

In order to evaluate the in-service pumping station building security status, a pumping station building safety evaluation system is built. Importance of safety evaluation index is analyzed, the projection pursuit method which is an objective weighting method of pumping station building safety evaluation is specially analyzed. Data is calculated according to the measured value of the pumping station building safety evaluation index. It is calculated through the projection pursuit method model, and the calculation results are analyzed,combined with the principle of projection pursuit method based on genetic algorithm. A pumping station in Jiangsu Province is used as an example. Index importanc of each index layer of the pumping station building security status is studied. Two indicator layers: concrete structure safety status and station body stability safety status indicators layer are studied. The projection pursuit model is used to analyze the importance of each evaluation index under each indicator layer. Matlab genetic algorithm toolbox is applied to compute each evaluation index weight. The results show that the measured strength of concrete is most important in the pumping station concrete structure safety status indicator layer, and the index weight of stability against sliding in the pumping station stand body stability safety index layer is the largest.