摘 要

驅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。作用在驅動車輪上的牽引力、制動力和側向力，也是經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，驅動橋殼的使用壽命直接影響汽車的有效使用壽命，因此，驅動橋殼應具有足夠的強度、剛度和良好的動態(tài)特性，合理地設計驅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，將三維建模軟件CATIA,前處理軟件ANSA,PATRAN和求解器NASTRAN結合起來，對全地域車的驅動橋殼進行有限元強度分析，旨在為全地域車的國產化和自主設計提供理論依據(jù)。主要內容有：采用CATIA軟件建立驅動橋殼的幾何模型；采用ANSA進行有限元網格劃分；對有限元模型施加載荷，計算最惡劣工況下的驅動橋殼的靜強度，找到驅動橋殼應力最大，變型量最大，容易引起斷裂的部位。最后，根據(jù)分析結果，為后續(xù)的逆向設計及其國產化提供設計依據(jù)。

關鍵詞：驅動橋殼，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 國內外研究現(xiàn)狀 1
1.2 立題意義及研究內容 2
1.2.1 立題意義 2
1.2.2 研究內容 2
2 有限元分析理論基礎 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 有限元網格劃分的基本原則 7
2.4 汽車設計中應用的有限元法 8
2.4.1有限元法在汽車設計中應用的意義 8
2.4.2 驅動橋殼設計應用的有限元法 10
3 驅動橋殼模型的建立 11
3.1 汽車驅動橋殼的有限元分析過程基本步驟 11
3.2 驅動橋殼的幾何模型 11
3.3 驅動橋殼有限元模型建立 13
4 驅動橋殼靜力分析 17
4.1 驅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 分析及結果 20
5 結論 27
6致謝 28
參考文獻 29