双横臂式前独立悬架的优化设计.rar

双横臂式前独立悬架的优化设计

摘 要

悬架是汽车上的重要总成之一，悬架的作用是弹性地连接车桥和车架，减缓行驶中车辆受到由路面不平引起的冲击力，保证乘坐舒适和货物完好，迅速衰减由于弹性系统引起的振动，使车轮按一定轨迹相对车身运动。悬架决定着汽车的稳定性、舒适性和安全性，所以研究悬架成为研究汽车中的重要一个环节，ADAMS软件为研究汽车悬架运动学分析提供了帮助。本次毕业设计首先利用ADAMS软件的View功能给定设计点，创建悬架模型，通过测试悬架模型得到一些曲线和数据，对比这些曲线和数据之后得出轮胎接地点的侧向滑移量变化是影响悬架的重要因素。所以将目标函数定为车轮接地点的侧向滑移量。然后通过ADAMS软件的后处理功能优化前悬架模型，最后得出使轮胎接地点的侧向滑移量变化最小的一组数据。从而达到优化的效果。

关键词：  双横臂独立悬架； 运动学分析； ADAMS  

Abstract

    Suspense is one of the important parts in a car. Suspense serves as a role that connects the axles and frames in a much bouncing way which can kill the unavoidable shock when the car is on a unsmooth road, thus making sure that the goods in the car cannot be damaged as well as guaranteeing a better driving pleasure. It can quickly kill the shock from the bouncing system to let the wheel move a the course of the car. Suspense determines the stability, riding comfort, and safety. Therefore, analyzing the suspense becomes one of the greatest parts of the whole analysis. ADAMS software did a great help to the analysis of suspense kinematics.The design of ADAMS software first given design points, View function to create suspension model, through the test suspension model get some curves and data, contrast these curves and data that pick up the tyres after the change of lateral sliding site is the important factors affect suspension. So will the objective function as the wheels of lateral slippage pick site. Then through the ADAMS software post-processing function optimization model of the suspension, finally come to pick up the tire place lateral sliding the smallest quantity of set of data. This group of data is finally wanted results.

Key words: double wishbone suspension; kinematics analysis; ADAMS

目 录

1 绪论 1

1.1课题引言 1

1.2 汽车悬架简介 1

1.3 汽车悬架分类

1.4 ADAMS简介

1.5 本文研究的内容 2

2前悬架模型的建立 3

2.1 创建新模型 3

2.2 添加约束 4

2.3本章小结.......................................................................................................................6

3前悬架模型运动学分析 7

3.1 添加驱动 7

3.2测量主销内倾角 7

3.3测量主销后倾角 10

3.4测量前轮外倾角 12

3.5测量前轮前束倾角 14

3.6测量车轮接地点侧向滑移量 17

3.7本章小结 19

4细化前悬架模型 21

4.1 创建设计变量 21

4.2将设计点参数化 21

4.3将物体参数化 25

4.4本章小结……………………………………………………………………………..25

5定制界面 32

5.1 创建修改参数对话窗………………………………….............................................32

5.2 修改菜单栏.................................................................................................................36

    5.3 本章小结................................................................................................................. 37

6 优化前悬架模型................................................................................................................ 26

   6.1 定义目标函数………………………………………………………………………..26

   6.2 优化模型……………………………………………………………………………..26

   6.3 察看优化结果………………………………………………………………………..27

   6.4 本章小结……………………………………………………………………………..31

本文总结 40

致谢 41

参考文献 42

附录A 汉语原文 43

附录B 英文翻译 52