再制造设计中的材料多属性决策方法

摘要

Material's properties have important effect on parts of product of remanufacturability.In order to select materials scien-tifically and objectively in design for remanufacture,a multi-attribute decision making method of material selection based on Dempster-Shafer evidential reasoning is proposed.Focused on demand of remanufacturability,a multi-attribute decision making hierarchical model of material was constructed,which took density,mechanical properties,remanufacturing process,economy and environmental perform-ance as evaluation indexes. Using Dempster-Shafer evidential reasoning theory, the multi-attribute decision making hierarchical model of material was transformed into a unified evaluation form. Furthermore,the comprehensive evaluation index was gotten to select the op-timal alternatives. Finally,a case study of material selection of engine cylinder block validates the effectiveness of this method.%材料性能对于产品零部件的再制造特性具有重要影响,为了在再制造设计中科学客观地选择材料,提出了一种基于证据推理的材料多属性决策方法.针对再制造特性需求,构建了包含密度、机械性能、再制造工艺、经济性、环境性能等指标的材料多属性决策层次模型.应用证据理论将材料多属性决策层次模型中的评价指标变换成统一的评价形式,综合所有的评价指标完成备选材料的选优排序.最后,以某发动机缸体材料的选择为例,证明了该方法的有效性.