【正文】 件下，可以計算出機械產品各處的位移、應力和應變?；蛘邔驓た闯墒且缓喼Я海：四承┨囟〝嗝娴淖畲髴χ?。 同樣，設計驅動橋 殼時，作為車輛的主要承載構件之一，驅動橋殼形狀和受力都很復雜，因此，要精確計算出驅動橋殼各狀態(tài)下各處的應力是很困難的 [3， 4]。 (2) 結構動力學分析 ： 可分為兩類問題。 1） 有限元法 有限元法由于能夠解決結構形狀和邊界條件都非常任意的力學問題，因而在實際中得到廣泛應用，成為一種可靠的新的數(shù)值計算方法，并取得許多實際效益。這樣，在圖紙最終完成后，就可以將設計正式投入生產，對實現(xiàn)最優(yōu)化設計、提高設計效率、縮短開發(fā)周期、節(jié)約成本具有重要意義。 關鍵詞： 有限元法， UG， ANSYS Workbench， 驅動橋殼，靜力分析，模態(tài)分析 湖 北 汽 車 工 業(yè) 學 院 畢 業(yè) 論 文 III Abstract As the mainly carrying and passing ponents 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 driving force, braking force and lateral force act on the wheel transfer to the suspension system, frame and carriage. This article studies based on light truck driver axle of QX1060, discusses in detail from the UG software parametric modeling, establish of ANSYS FEM model, and the boundary conditions imposed, etc. And through drive axle housing of the four main conditions of static analysis and modal analysis, it can access the stress distribution and deformation in the corresponding status of drive axle directly. Thus, under the premise of ensuring the strength of drive axle housing, stiffness and dynamic performance requirements, the analysis can raise feasible measures and remendations in drive axle housing design. Keywords： Finite element method， UG， ANSYS Workbench， Drive axle housing，Static analysis， Modal analysis 湖 北 汽 車 工 業(yè) 學 院 畢 業(yè) 論 文 IV 目錄 摘 要 .......................................................................................................................................... II Abstract ............................................................................................................................... III 1 緒論 ...................................................................................................................................... 1 課題來源及意義 ..................................................................................................... 1 國內外研究現(xiàn)狀 ..................................................................................................... 1 ANSYS 軟件介紹 ...................................................................................................... 4 概述 .............................................................................................................. 5 ANSYS 的主要模塊及功能 .......................................................................... 5 ANSYS 的主要技術特點 .............................................................................. 6 ANSYS Workbench 簡介 .............................................................................. 7 CAD/CAE 在汽車設計中的應用 ............................................................................. 8 課題研究內容 ......................................................................................................... 8 2 驅動橋殼的 CAD 建模 ...................................................................................................... 10 驅動橋殼的結構特點 ........................................................................................... 10 UG 軟件介紹及參數(shù)化建模思想 ......................................................................... 10 UG 軟件介紹 ............................................................................................... 10 UG 參數(shù)化建模思想和一般模塊介紹 ..................................................... 11 驅動橋殼的建模及簡化處理 .............................................................................. 14 驅動橋殼三維的建模 ............................................................................... 14 驅動橋殼的模型簡化處理 ....................................................................... 16 3 驅動橋殼靜力分析 .......................................................................................................... 18 靜力分析概述 ....................................................................................................... 18 驅動橋殼靜力分析典型工況 .............................................................................. 18 建立驅動橋 殼有限元模型 .................................................................................. 20 幾何模型的導入 ....................................................................................... 20 湖 北 汽 車 工 業(yè) 學 院 畢 業(yè) 論 文 V 生成橋殼有限元模型 ............................................................................... 21 驅動橋殼各工況靜力分析 .................................................................................. 23 沖擊載荷工況 ............................................................................................ 23 最大驅動力工況 ....................................................................................... 25 最大制動力工況 ....................................................................................... 28 最大側向力工況 ....................................................................................... 30 4 驅動橋殼的模態(tài)分析 ...................................................................................................... 34 模態(tài)分析理論 ....................................................................................................... 34 建立模態(tài)分析有限元模型 .................................................................................. 35 驅動橋殼模態(tài)分析 ............................................................................................... 36 自由模態(tài)分析 ............................................................................................ 37 約束模態(tài)分析 ............................................................................................ 41 模態(tài)分析總結 ............................................................................................ 47 5 課題總結與展望 ............................................................................................................... 48 課題總結 ..............................................