摘要

本文主要研究麦弗逊前悬架设计分析方法，以及悬架运动与操纵稳定性的变化关系。

首先，对悬架的性能参数进行选择，包括前后悬架的偏频、相对阻尼系数、非簧载质量等。在选择完基本参数后，对悬架的弹性元件进行设计计算，之后设计前独立悬架的导向机构。然后设计减振器，计算减振器的尺寸，并且验算减振器是否满足强度要求。最后，为前悬架设计了一个横向稳定杆。

　　　接着以某SUV为例，应用多体运动学与动力学仿真软件ADAMS中的CAR模块方便地建立了悬架系统的仿真模型，并进行了仿真计算。本文给出了前轮四个定位参数各自的定义，分析了这些定位参数对车辆性能的影响。本文还简单地介绍了虚拟仿真技术以及虚拟仿真软件ADAMS/Car的基本应用，叙述了在ADAMS/Car的软件平台上，运动学模型的创建和仿真分析的具体过程。接下来，本论文对建好的麦克弗逊前悬架系统模型进行了仿真分析。通过模拟平行车轮跳动，得出了前轮四个定位参数各自的初始值以及变化特性曲线。并对这四个定位参数的变化特性进行了简单的分析。本论文还使用ADAMS/Insigh中的设计研究和优化设计功能，对悬架模型进行了优化分析。调整、改良了厂家前悬架模型的几何尺寸及位置的原始数据，得到了较为成功的优化结果。

关键词:设计，麦克弗逊悬架，建模，仿真分析。

Abstract

　　　This article is mainly about to study the method of designing a 2L car’s front Macpherson suspension, and the article analyze the relation between suspension movementand front wheel alignment parameters.

　　　First, we choose the suspension’s property paremeters, including front suspension’s frequency, relative viscosity, unsprung mass. After these basic parameters were chosen, we comes on to calculate the spring of the suspension. And next comes to design the control bars of the front independent suspension. Then, we design shock absorbers including calculate the size of the absorbers and also check the absorbers to see if it meets the demand of strength. At last , it designs a anti-roll bar for the front Macpherson suspension.

　　　Then this article establishes the simulation modeling of a suspension with ADAMS/CAR and verifies the results based on the parameters of a certain 2L SUV.This paper gives definition to four Fore-wheel Locating Parameters and analyze the influence of the Macpherson Suspension’s parameters to the Vehicle’s riding performance. Also, this paper touches the basic elements of the Virtual Prototyping Technology and Virtual Prototyping software-ADAMS/Car, and it illuminates the process of how a kinematics model is been built and analyzed on the platform of ADAMS software. In this thesis, ADAMS software is used in the analyze and optimize process of Vehicle Independent Suspension. By imposing a upright motion of a parallel wheel travel test to the suspension, I can get and analyze the fluctuating of suspension’s four parameters while automobile is running. Also in this paper, Design Study & Optimization function is used. In Optimization, with the optimize aim of properly reduce preliminary value and its fluctuate range, the suspension model’s size and geometry structure get improved.The optimize result is quite successful oppositely.

Keywords: Design， Macpherson Suspension，Modeling，Simulation Analy.