毕业论文-完整版

某鼓式制动器的三维建模及其有限元分析

学 院 专 业 班 级 学 号 姓 名 指导教师 负责教师

2010年6月

沈阳航空航天大学毕业设计（论文）

摘 要

国内汽车市场迅速发展，而轿车是汽车发展的方向。然而随着汽车保有量的增加，带来的安全问题也越来越引起人们的注意，而制动系统则是汽车主动安全的重要系统之一。因此，如何开发出高性能的制动系统，为安全行驶提供保障是我们要解决的主要问题。另外，随着汽车市场竞争的加剧，如何缩短产品开发周期、提高设计效率，降低成本等，提高产品的市场竞争力，已经成为企业成功的关键。

首先，通过CATIA建立鼓式制动器三维实体模型，然后将制动鼓，制动蹄三维实体模型，导入ANSYS中，进行静力学分析。以研究制动鼓、制动蹄的应力、位移状态。检查是否满足强度要求。

除此之外，对鼓式制动器进行模态分析。确定其固有频率和固有振型，以检验鼓式制动器是否会发生共振，并为降低制动噪音提供了方案。

关键词：鼓式制动器；CATIA；ANSYS；模态分析

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沈阳航空航天大学毕业设计（论文）

A drum brake of 3d modeling and finite element analysis

Abstract

Rapid development of domestic automobile market, and the direction of development of auto cars. However, with the increase of car quantities of security is becoming more and more attention, and brake system is an important system of active safety car. Therefore, how to develop high-performance braking system, provide guarantee for safe driving is the key problem to be solved. In addition, with the automobile market competition intensifies, how to shorten the development cycle, and improve the design efficiency and reduce cost, increase the market competitive enterprises has become the key to success.

First of all, the adoption of CATIA drum brake’s three-dimensional solid model set up. And then drum brake, brake shoe’s three-dimensional solid model into ANSYS, carries on the statics analysis. To study the drum brake, brake shoe of the stress, the displacement status. Check the drum brake whether satisfies the intensity request.

In addition, which carries on the modality analysis to the drum brake. Afterwards determine its natural frequency and inherent vibration mode, examines the drum brake wether can have resonating. The finite mode analysis is conducted to find methods for lowering the brake noise.

Key works:Drum brake; CATIA; ANSYS; Modal Analysis

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沈阳航空航天大学毕业设计（论文）

目 录

1绪论 .................................................................................................................................... 1 1.1引言 .............................................................................................................................. 1 1.2汽车制动系发展历史 .................................................................................................. 3 1.3鼓式制动器有限元分析的国内外研究状况 .............................................................. 4 1.4课题的来源、主要研究内容 ...................................................................................... 4 1.4.1课题来源 ............................................................................................................... 5 1.4.2 主要研究内容 ...................................................................................................... 5 2鼓式制动器的三维建模与装配 ........................................................................................ 7 2.1CATIA软件概述 .......................................................................................................... 7 2.2CATIA的主要功能模块简介 ...................................................................................... 9 2.3鼓式制动器的实体模型 ............................................................................................ 10 2.3.1制动蹄的三维建模 ............................................................................................. 11 2.3.2摩擦蹄片的三维建模 ......................................................................................... 11 2.3.3装配制动蹄及摩擦衬片 ..................................................................................... 12 2.3.4制动底板、制动鼓及辅助零件图的三维建模 ................................................. 12 2.3.5鼓式制动器的装配 ............................................................................................. 13 3 鼓式制动器有限元的静力分析 ..................................................................................... 16 3.1有限元法概述 ............................................................................................................ 16 3.2有限元分析在国内汽车业的应用 ............................................................................ 17 3.3 ANSYS软件介绍 ...................................................................................................... 18 3.4鼓式制动器有限元模型的建立 ................................................................................ 19 3.4.1定义单元类型 ..................................................................................................... 19 3.4.2定义材料特性 ..................................................................................................... 20 3.4.3划分网格 ............................................................................................................. 22 3.5接触的施加 ................................................................................................................ 24 3.5.1识别接触对 ......................................................................................................... 25

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