汽車橫向穩(wěn)定桿有限元分析

車輛工程專業(yè)畢業(yè)論文，論文編號:JX893  論文字數(shù):11487.頁數(shù):31

摘     要
 
 橫向穩(wěn)定桿作為汽車底盤懸架系統(tǒng)中的重要零部件之一，可以在保證汽車行駛平順性的前提下提高懸架的側(cè)傾角剛度，使汽車在路況不平或者轉(zhuǎn)彎時能夠減少車身傾角、行駛平穩(wěn)，即兼顧汽車的操縱穩(wěn)定性。目前市場上無論轎車、運動型多功能車等基本都配裝了橫向穩(wěn)定桿，客車、卡車也越來越多的裝配了橫向穩(wěn)定桿。裝有穩(wěn)定桿的車輛行駛較穩(wěn)定、舒適，翻車幾率大大降低。據(jù)統(tǒng)計，在路況差，急轉(zhuǎn)彎時，裝有穩(wěn)定桿的車輛翻車概率降低60%～80%。因此，在汽車懸架的設(shè)計過程中，橫向穩(wěn)定桿的設(shè)計計算顯得尤為重要。采用傳統(tǒng)的力學方法，只能近似的反應(yīng)其受力狀況和變形情況，遠不能滿足進一步分析的需要，而ANSYS軟件正是針對解決這一類問題設(shè)計的。它是目前最先進的分析方法，其利用基于理論平臺的有限元技術(shù)分析、預(yù)測、評價這些關(guān)鍵零件的強度剛度。
 本文所述就是利用ANSYS軟件對橫向穩(wěn)定桿進行三維建模、定義單元類型及材料屬性、劃分網(wǎng)格，然后對特定的節(jié)點施加相應(yīng)的約束，再對橫向穩(wěn)定桿的一段的特定節(jié)點施加力，最后用ANSYS軟件中的處理器對上述的操作進行計算，分析結(jié)果。最后提出提高穩(wěn)定桿性能的方案。

關(guān) 鍵 詞：橫向穩(wěn)定桿 有限元 剛度

Abstract
 Stabilizer bar suspension system of a vehicle chassis in one of the important parts, you can ensure vehicle ride comfort under the premise of the roll angle increased suspension stiffness, making the car turn in the road uneven, or when the body can reduce the angle, smooth ride that both the car handling and stability. Currently on the market regardless of cars, sport utility vehicles are equipped with the basic installation of the horizontal stabilizer bars, buses, trucks, more and more of the assembly of the horizontal stabilizer bar. Vehicles equipped with a stabilizer bar in the stable, comfortable, greatly reduce the chance of rollover. According to statistics, poor road conditions, a sharp turn when the vehicle overturned with stabilizer bar reduces the probability of 60% to 80%. Therefore, the design process of vehicle suspension, stabilizer bar design and calculation is very important. Traditional mechanical methods can only approximate the response to the loading force and deformation, can not meet the need for further analysis, and ANSYS software is the solution to this kind of problem for the design. It is the most advanced analytical methods, the use of finite element based on theoretical platform technical analysis, prediction, and eva luation of these key components of the strength of stiffness.                                                        
 ANSYS software described in this article is to use three-dimensional modeling of the horizontal stabilizer bar, the definition of cell types and material properties, meshing, and then put the corresponding node on the specific constraints, and then a section of the surface of the roll bar to exert power, and finally ANSYS software processors operating on the above calculated results. From the results obtained after the force displacement data, through the angular stiffness formula of calculation of angular stiffness, then the results will be compared with the traditional calculation method.

Key words:  Stabilize bar, FEM, Stiffness

目 錄
摘     要 i
Abstract ii
目 錄 iii
第一章  緒論 1
1.1研究目的 1
1.2研究現(xiàn)狀 2
1.3研究方法 2
1.4論文內(nèi)容概述 3
1.5論文課題的來源 3
第二章 有限元法和ANSYS軟件 4
2.1 有限元分析軟件ANSYS 4
2.1.1前處理模塊 4
2.1.2分析計算模塊 5
2.1.3后處理模塊POST1 6
2.1.4 ANSYS軟件的結(jié)構(gòu) 6
2.2 有限元法介紹 7
2.2.1有限元法基本概念 7
2.2.2 有限元法的一般程序結(jié)構(gòu) 9
第三章 橫向穩(wěn)定桿有限元分析 11
3.1 引言 11
3.2 橫向穩(wěn)定桿介紹 11
3.3 橫向穩(wěn)定桿研究方法 11
3.3.1橫向穩(wěn)定桿計算公式 11
3.3.2 橫向穩(wěn)定桿的主要影響因素分析 13
3.3.3 橫向穩(wěn)定桿彎曲處曲率半徑的確定 13
3.4 對橫向穩(wěn)定桿建模、劃分網(wǎng)格及后處理 14
3.4.1 定義工作文件名和工作標題 14
3.4.2 定義單元類型及材料屬性 14
3.4.3 建立中心軸線 14
3.4.4 采用拖動生成3D圖 15
3.4.5 劃分網(wǎng)格 16
3.4.6 施加約束 17
3.4.7 施加載荷 18
3.4.8軟件計算 18
3.5 計算結(jié)果分析 18
3.5.1 應(yīng)力分析 18
3.5.2 角剛度計算 21
3.5.3 結(jié)果分析 21
第四章 總結(jié) 22
參考文獻 23
致   謝 24
附錄 命令流 25