本文選題：多材料選擇 + 回收利用　； 參考：《湖南大學(xué)》2016年碩士論文

【摘要】：在汽車零部件的開發(fā)設(shè)計(jì)階段,零件的選材是個(gè)非常重要的環(huán)節(jié),而且隨著汽車工業(yè)的快速發(fā)展,汽車保有量和報(bào)廢汽車數(shù)量的不斷增加,引發(fā)的環(huán)境、資源等問題受到了越來越多的重視,在汽車零部件的選材階段考慮材料的回收利用性能具有重要的意義。但是有很多汽車零部件多材料選擇研究都沒有考慮汽車產(chǎn)品的回收再利用性能,本文在對(duì)前人學(xué)者研究的基礎(chǔ)上,考慮汽車產(chǎn)品的回收再利用性能,為汽車零部件進(jìn)行多材料的優(yōu)化選擇。其主要研究?jī)?nèi)容如下:由于回收利用性能是一個(gè)定性的參數(shù),所以本文通過查閱相關(guān)文獻(xiàn),歸納并整理影響汽車多材料回收利用性能的五個(gè)關(guān)鍵因素:材料處理、材料類型、連接類型、回收設(shè)備和回收利潤(rùn),由于前四個(gè)影響因素是模糊的,所以本文根據(jù)一定的模糊判斷準(zhǔn)則對(duì)這四個(gè)模糊影響因素劃分等級(jí),賦予不同的隸屬度標(biāo)度,并根據(jù)模糊層次分析法確定各個(gè)模糊因素相對(duì)于回收利用值的權(quán)重系數(shù),用這四個(gè)模糊參數(shù)的線性加權(quán)來表示汽車材料的回收利用值。汽車產(chǎn)品的回收利用性能是通過回收利用值和回收利潤(rùn)來評(píng)估的,所以本文在滿足汽車產(chǎn)品結(jié)構(gòu)性能的前提下,為材料類型分配唯一的標(biāo)識(shí)編碼,將材料類型和零件的幾何參數(shù)組合作為設(shè)計(jì)變量空間,綜合考慮車身質(zhì)量、成本、回收利用值和回收利潤(rùn),建立面向回收再利用的多材料優(yōu)化數(shù)學(xué)模型;并通過多目標(biāo)遺傳優(yōu)化算法NSGA-Ⅱ?qū)?shù)學(xué)模型進(jìn)行優(yōu)化求解。本文以某車型的發(fā)動(dòng)機(jī)罩為例,在保證發(fā)動(dòng)機(jī)罩扭轉(zhuǎn)剛度和約束模態(tài)基本不變的前提下,建立發(fā)動(dòng)機(jī)罩內(nèi)外板材料類型和厚度的優(yōu)化數(shù)學(xué)模型,得出發(fā)動(dòng)機(jī)罩內(nèi)外板的最佳材料組合方案;建立發(fā)動(dòng)機(jī)罩的有限元模型,分析發(fā)動(dòng)機(jī)罩內(nèi)外板最佳材料組合方案的扭轉(zhuǎn)剛度和約束模態(tài);通過設(shè)計(jì)并搭建試驗(yàn)臺(tái)架,對(duì)發(fā)動(dòng)機(jī)罩扭轉(zhuǎn)剛度和約束模態(tài)進(jìn)行試驗(yàn),對(duì)比仿真和試驗(yàn)結(jié)果,驗(yàn)證了面向回收再利用的多材料優(yōu)化選擇方法的可行性,為汽車零部件產(chǎn)品材料的優(yōu)化選擇提供了新的思路。
[Abstract]:In the development and design stage of automobile parts, the material selection of parts is a very important link, and with the rapid development of the automobile industry, the number of vehicle ownership and scrap vehicles is increasing, which leads to the environment. More and more attention has been paid to the problem of resources, so it is of great significance to consider the recovery and utilization of materials in the selection stage of automobile parts. However, many researches on the multi-material selection of automobile parts have not considered the recovery and reuse performance of automobile products. Based on the previous research, this paper considers the recovery and reuse performance of automobile products. Optimize the selection of multi-material for auto parts. The main research contents are as follows: because the recycling performance is a qualitative parameter, this paper summarizes and arranges five key factors that affect the recovery and utilization performance of automobile multi-material by consulting relevant literature: material treatment, material type, and so on. Because the first four influencing factors are fuzzy, the connection type, the recovery equipment and the recovery profit are classified according to a certain fuzzy judgment criterion, and different membership scales are given. According to the fuzzy analytic hierarchy process, the weight coefficient of each fuzzy factor relative to the recycling value is determined, and the linear weight of the four fuzzy parameters is used to express the recycling value of automobile material. The recycling performance of automobile products is evaluated by recycling value and profit, so this paper allocates a unique identification code for material type under the premise of satisfying the structure and performance of automobile products. Taking the combination of material type and geometric parameters of parts as design variables, considering the quality, cost, value of recovery and profit of the body, a mathematical model of multi-material optimization for recycling is established. The mathematical model is solved by multi-objective genetic optimization algorithm NSGA- 鈪，

本文編號(hào)：1894096