摘 要

驅(qū)動橋殼作為汽車的主要承載件和傳力件，支撐著汽車的荷重，并將載荷傳給車輪。作用在驅(qū)動車輪上的牽引力、制動力和側(cè)向力，也是經(jīng)過橋殼傳到懸掛及車架或者車廂的。由于該汽車的行駛工況比較復雜，驅(qū)動橋殼的使用壽命直接影響汽車的有效使用壽命，因此，驅(qū)動橋殼應具有足夠的強度、剛度和良好的動態(tài)特性，合理地設(shè)計驅(qū)動橋殼也是提高汽車平順性和舒適性的重要措施。
本文以有限元靜態(tài)分析理論為基礎(chǔ)，將三維建模軟件CATIA,前處理軟件ANSA,PATRAN和求解器NASTRAN結(jié)合起來，對全地域車的驅(qū)動橋殼進行有限元強度分析，旨在為全地域車的國產(chǎn)化和自主設(shè)計提供理論依據(jù)。主要內(nèi)容有：采用CATIA軟件建立驅(qū)動橋殼的幾何模型；采用ANSA進行有限元網(wǎng)格劃分；對有限元模型施加載荷，計算最惡劣工況下的驅(qū)動橋殼的靜強度，找到驅(qū)動橋殼應力最大，變型量最大，容易引起斷裂的部位。最后，根據(jù)分析結(jié)果，為后續(xù)的逆向設(shè)計及其國產(chǎn)化提供設(shè)計依據(jù)。

關(guān)鍵詞：驅(qū)動橋殼，有限元法，CATIA，ANSA，MSC.PATRAN，MSC.NASTRAN
靜力分析






ABSTRACT

As the mainly carrying and passing components of the vehicle, the automobile drive axle housing supports the weight of vehicle, and transfer the weight to the wheel. Through the drive axle housing, the tractive force, braking force and lateral force act on the wheel transfer to the suspension system, frame or carriage. As the driving condition of the automobile is so complex, the service life of the drive axle housing affects the effective life of vehicle, therefore, enough intensity, good dynamic performance and rigidity are required for designing the drive axle housing, which also can improve vibration comfortableness and ride comfort of vehicle.
In this paper, we combined with the three-dimensional modeling software CATIA, the former processing software ANSA, PATRAN and the solver NASTRAN together to complete the whole process analysis, which based on the FEM theoretical, at last with objective of providing basis for domestic and autonomy design of the wide geographical tuck . The main contents are as follows: established a bridge driver of the geometric shell model with CATIA; used ANSA accomplishing finite element mesh; and imposed on the load, calculate the static strength in worst condition of the bridge shell, find the site of largest amount displacement on the housing, which can easily lead to fracture. Finally, in the light of the outcome, provide basis for the reverse and follow-up localization design.


Key words：Drive bridge shell(G ate bridge), the finite element method, CATIA, ANSA, MSC.PATRAN, MSC.NASTRAN, Static analysis


目 錄

中文摘要 Ⅰ
ABSTRACT Ⅱ
1緒論 1
1.1 國內(nèi)外研究現(xiàn)狀 1
1.2 立題意義及研究內(nèi)容 2
1.2.1 立題意義 2
1.2.2 研究內(nèi)容 2
2 有限元分析理論基礎(chǔ) 3
2.1 有限元分析法概述 3
2.2 有限元分析軟件簡介 3
2.3 有限元法簡介 6
2.3.1有限元法的歷史 6
2.3.2 有限元分析過程 7
2.3.3 有限元網(wǎng)格劃分的基本原則 7
2.4 汽車設(shè)計中應用的有限元法 8
2.4.1有限元法在汽車設(shè)計中應用的意義 8
2.4.2 驅(qū)動橋殼設(shè)計應用的有限元法 10
3 驅(qū)動橋殼模型的建立 11
3.1 汽車驅(qū)動橋殼的有限元分析過程基本步驟 11
3.2 驅(qū)動橋殼的幾何模型 11
3.3 驅(qū)動橋殼有限元模型建立 13
4 驅(qū)動橋殼靜力分析 17
4.1 驅(qū)動橋殼靜力分析工況 17
4.2 分析工況在PATRAN中的實現(xiàn) 18
4.2.1 單元選擇和材料參數(shù)的確定 18
4.2.2 載荷和約束的處理 19
4.2.3 分析及結(jié)果 20
5 結(jié)論 27
6致謝 28
參考文獻 29