电力驱动轿车麦弗逊式独立前悬架设计.doc

10 - 上海工程技术大学毕业设计（论文） 电力驱动轿车麦弗逊式独立前悬架设计 1 - 摘 要 麦弗逊式独立悬架有着结构简单、紧凑、占用空间小等众多优点，在现代轻型汽车中得到了广泛运用。 本毕业设计要求是对一款电动车前麦弗逊式独立悬架进行校准和设计计算。在设计中，首先，分析了麦弗逊独立悬架的组成和功用；其次，进行悬架的上各零部件强度的校核；第三，详细考虑各部件之间的连接关系；最后在此基础上进行悬架自然振动频率，悬架静挠度和动挠度以及悬架弹性特性的计算。在分析麦弗逊悬架的组成和作用以及各零部件的尺寸确定的基础上，再利用CAD软件进行二维制图。此次的设计进行了准确的计算和详细的结构分析，为麦弗逊悬架的结构优化提供了依据，从而在运动学和动力学方面提高汽车的性能。 关键词：麦弗逊悬架，电动汽车，校核  Finite Element Modeling and Analysis for the Modals of Mass Transit Vehicles Door ABSTRACT Mcpherson type independent suspension has many advantages，such as simple structure，compact，small footprint，and so on. The requirements of this graduation project is to design and calculate the front suspension of an electric vehicle type Mcpherson independent suspension. In the design，firstly，analyses the composition and function of Mcpherson independent suspension; secondly，check the strength of the parts and components of suspension on the third; detailed consideration of connections between the various components; finally，on the basis of the natural vibration frequency of the suspension，suspension deflection and dynamic deflection and elastic characteristics of the suspension calculation. Based on the analysis of the composition and function of the Mcpherson suspension and the determination of the dimensions of the components，the CAD software is used to carry out the 2D drawing. This design has carried on the accurate computation and the detailed structural analysis，has provided the basis for the Mcpherson suspension structure optimization，thus enhances the automobile performance in the kinematics and the dynamics aspect. Key words: Mcpherson suspension，electric vehicle，check  电力驱动轿车麦弗逊式独立前悬架设计 代国文 011109119 1 绪论 1.1 课题背景与设计意义 众所周知，悬架是汽车行驶系统的重要组成部分。它是车架（或承载式车身）与车桥（或车轮）之间的一切传力连接装置的总称。现代汽车的悬架虽然有各种不同的结构形式，但一般都由弹性元件、减震器、导向机构和横向稳定装置4部分组成。汽车六大性能（它们分别是动力性、燃油经济性、制动性、操纵稳定性、平顺性和通过性）的好坏决定了汽车整体性能的好坏，而悬架的性能在一定程度上直接影响了汽车的操纵稳定性和平顺性。所以，悬架设计在整个汽车设计环节中显得尤为重要。汽车悬架可分为两大类，一种是独立悬架，另一种是非独立悬架。独立悬架其结构特点是车桥做成断开的，每一侧的车轮可以单独通过弹性悬架与（或车身）连接，两