摘要

在當(dāng)今社會(huì)，節(jié)能與環(huán)保已經(jīng)成為社會(huì)發(fā)展的主題，鎂合金具有比重小，高比強(qiáng)度，高比剛度以及良好的鑄造性能和阻尼，吸震，降噪能力強(qiáng)等一系列優(yōu)點(diǎn)，是目前市場上最輕的商用金屬結(jié)構(gòu)材料，在亟待減重的輪轂上具有廣闊的應(yīng)用前景。
現(xiàn)有輪轂的結(jié)構(gòu)都是針對(duì)鋼和鋁合金設(shè)計(jì)的，由于鎂合金與鋼、鋁合金的機(jī)
械性能差別較大，因此必須對(duì)原結(jié)構(gòu)輪轂的服役應(yīng)力狀態(tài)進(jìn)行分析，以確保材料
替代后的服役性能。為實(shí)現(xiàn)輪轂材料的更新?lián)Q代、推動(dòng)鎂合金在輪轂上的合理應(yīng)
用，本文應(yīng)用有限元法，對(duì)輪轂進(jìn)行應(yīng)力分析并做出改進(jìn)以滿足服役要求.

關(guān)鍵詞：鎂合金，鋁合金，輪轂，替代技術(shù)，有限元法，應(yīng)力分析，結(jié)構(gòu)再設(shè)計(jì)




ABSTRCT
In modern society，energy conservation and environmental protection are the main subject of social development. Magnesium alloys have many advantages，like low-gravity，high specific strength and stiffness，good casting property and outstanding damping capability，reduced noise and vibration, etc. They are the lightest commercial metallic material for structural application，and have great potential for use in wheels of road vehicles.
However，the Mg alloys cannot be directly used on the commercial wheels because Mg alloys possess material properties considerably different from those materials，such as steel or Al alloys，to which the wheel is designed for. To ensure the performance and safety，the service condition of the wheels has to be analyzed and the structure of the Mg wheels have to redesigned to in accordance with the materials properties of Mg alloys. To promote a scientific understanding on the effect of material substitution and structural features on the service condition of wheels， finite element method is used to optimize wheel structure in the present study.


Keywords: Magnesium Alloy，Aluminum Alloy，Wheel，Material Substitution，F(xiàn)EM Stress Analysis，Structural Redesign.







目錄
摘要 Ⅰ
Abstract Ⅱ
目錄 III
緒論 1
1課題背景、意義及研究內(nèi)容 2
1.1 課題背景 2
1.2 課題意義 3
1.3 課題研究內(nèi)容 3
2鎂合金的基本性質(zhì)及應(yīng)用情況 4
2.1 鎂合金的性質(zhì) 4
2.2鎂合金的廣泛應(yīng)用及基本成形技術(shù) 5
2.2.1 鎂合金的應(yīng)用情況 5
2.2.2 鎂合金成形技術(shù) 6
3 輪轂的結(jié)構(gòu)設(shè)計(jì) 9
3.1 車輪輪轂設(shè)計(jì)概述 9
3.1.1 車輪的基本設(shè)計(jì)知識(shí) 9
3.1.2 車輪的種類 10
3.1.3 車輪的基本裝配知識(shí) 10
3.1.4 車輪設(shè)計(jì)基本步驟 11
3.2 關(guān)于設(shè)計(jì)的基本原則及要求 12
3.2.1 基本設(shè)計(jì)原則 12
3.2.2 滿足強(qiáng)度要求的設(shè)計(jì)準(zhǔn)則 12
4 輪轂的分析及優(yōu)化 14
4.1輪轂分析優(yōu)化的重要性 14
4.2 輪轂的分析原則 14
4.3 有限元法 15
4.3.1 有限元法簡述 15
4.3.2 有限元法優(yōu)缺點(diǎn) 16
4.3.3 有限元法在材料替代中的應(yīng)用 16
4.4 再設(shè)計(jì)輪轂的有限元分析及改進(jìn) 19
5 結(jié)論 23

致謝 24
參考文獻(xiàn) 25