改进层次分析法和模糊综合评判实现压铸镁合金选材

Improved Analysis Hierarchy Process and Fuzzy Synthetic Judgment on the Selection of Die Casting Magnesium Alloys

材料选择过程中涉及因素多,必须对材料从整体上进行综合评价,建立正确的评判模型,从而客观合理确定优选材料。本文将模糊综合评价作为镁合金材料优选的主要方法,建立了压铸镁合金材料选择的评价模型,通过改进层次分析法确定了指标权重(隶属度);划定了评价指标等级,包括:很差、较差、一般、较好和很好五个等级;并将加权平均作为模糊综合评判运算模型。同时,以一手机外壳选材为例,具体说明该模型运行过程,评价结果较好的符合实际情况。

There are many factors in the selection of material, therefore, it is necessary to synthetically evaluate material all-sided and set up the evaluation model in order to select ,the most suitable material. Fuzzy Synthetic Judgment （FSJ） is adopted as the main evaluation method and the evaluation system of material selection is established in this investigation. Weighting is based on Improved Analysis Hierarchy Process（IAHP）. Evaluation index grade is classified into five grades： very poor, poor, common, good and excellent. In this investigation, the method of weighted average was used as an arithmetical model of FSJ. Finally, material selection of a mobile telephone cover was taken as an example to illustrate the system, and the evaluation result is in good accordance with the practical situation.