毕业设计--中级轿车前悬架设计

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1、 中级轿车前悬架设计 2012 年 6 月 摘 要 本文主要研究中级轿车的前悬架设计分析方法，以及悬架运动与前轮定位参数的变化关系。 首先根据设计给定的参数对整车进行总体设计， 包括整车的尺寸参数、 质量参数和性能参数， 在选择这些参数的时候可以通过国家标准以及相关的经验参数得到，在选择之后进行了相关的验 证，保证各参数能达到各项性能的基本要求。在总体设计完成之后，对前悬架进行方案的选择， 本设计悬架采用麦弗逊独立悬架。然后对悬架的性能参数进行选择，包括悬架的偏频、相对阻尼 系数、非簧载质量。在选择完基本参数后，对悬架的弹性元件（螺旋弹簧）进行设计计算，包括 刚度和强度等的校核，使设计的弹簧能

2、满足设计的偏频要求。之后为悬架匹配减振器，计算减振 器的尺寸，并且验算减振器是否满足强度要求和稳定性要求。最后,利用 Pro/E 软件对已设计的 好的零件进行三维建模，得到悬挂的装配图，并用 Pro/E 中的机构模块对悬挂进行运动学分析。 关键词： 麦弗逊 悬架 Pro/E 机构仿真 第 V 页 Abstract This article is mainly about to study the method of designing a light cars front suspension, also the article analyze the relation between sus

3、pension movement and front wheel alignment parameters. First, it designs the scheme of whole car based on the four parameters which was already been given, this including the whole cars size parameters, weight parameters, and property parameters. we may choose those parameters refer to national stan

4、dards or some relative experience parameters. we may also do some work to prove the chosen was correct after those parameters being chosen, as to make every parameters meet the basic demand of every property. when the whole car schemes were already designed, it then comes to choose the scheme of the

5、 front and back suspensions, and in this design, we use McPherson type front suspension, Back suspensions steel spings.and then, we choose the suspensions property paremeters,including front and back suspensions frequency, relative viscosity,unsprung mass and roll center height, roll angular rigidit

6、y which effect the cars controllability and stability,besides,we also choose the trim center height which effect the cars longitudinal controllability. After these basic parameters were chosen, we comes on to calculate the spring of the suspension,(spiral spring ),and the calculation including checking both the springs stiffness and strength, as to make the spring designed to meet the demand of frequency. And next comes to design the control bars of the front independent suspension,