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工程设计学报
Chinese Journal of Engineering Design  2008, Vol. 15 Issue (2): 120-123    DOI:
    
Establishment and application of decision making model for engineering materials selection based on relative degree of incidence
 ZHANG  Tian-Yun1,2, YANG  Rui-Cheng2, CHEN   Kui2
1.Center of Information and Network, Lanzhou City University, Lanzhou 730070, China;
2.State Key Laboratory of Gansu Advanced Nonferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, China
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Abstract  The shape similarity of curves of candidate materials and ideal ones was reflected by degree of grey incidence. Based on comprehensive consideration of influence of ideal solution and negative ideal one, the model of decision making for engineering materials selection was established by constructing relative degree of incidence. Taking the selection of storage pot material working under low temperature as an example, according to the weight set of eight indices obtained through experts' evaluation, the ideal and negative ideal solutions were determined, and then relative degree of incidence of ten kinds of candidate low-temperature materials were calculated respectively and finally selection was determined. The results show that the relative degree of incidence of 310 stainless steel is the highest, which means that it's the best storage pot material working under low temperature, which accords with industry practice and the method of weighted average, and moreover, the evaluation and rank obtained from degree of grey incidence for candidate materials are more reasonable. Due to the fact that this model reflects the shape similarity of curves of candidate materials with both ideal and negative ideal solution, model of decision making of engineering materials selection displays a clear physical implication, with which the analysis is more comprehensive and objective. Hence, this model is a powerful tool for decision making of engineering materials selection. 

Key words：  degree of grey incidence      relative degree of incidence      engineering material selection      making decision     
Published: 28 April 2008
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ZHANG Tian-Yun
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CHEN Kui
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ZHANG Tian-Yun, YANG Rui-Cheng, CHEN Kui. Establishment and application of decision making model for engineering materials selection based on relative degree of incidence. Chinese Journal of Engineering Design, 2008, 15(2): 120-123.

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https://www.zjujournals.com/gcsjxb/     OR     https://www.zjujournals.com/gcsjxb/Y2008/V15/I2/120


基于相对关联度的工程选材决策模型及应用

根据灰色关联度反映候选材料的理想解之间曲线形状的相似性,在综合考虑正、负理想解影响的基础上,通过构造相对关联度,建立工程选材决策模型.以低温存储罐材料选择为例,根据专家评分得到所选8种评价指标的权重,确定理想解和负理想解,继而分别计算10种候选低温材料的相对关联度,进行选材决策.结果表明：全硬态301型不锈钢的相对关联度最高,是最佳的低温存储罐材料,这与实际应用和加权性质分析法得出的选择结果一致,而且所得其他候选材料的测评效果排序也更加合理.该模型同时反映候选材料的理想解和负理想解之间曲线的相似性,物理含义更加明确,分析问题更加全面、客观,是工程选材决策的有力工具.

关键词： 灰色关联度,  相对关联度,  工程材料选择,  决策 
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