摘 要

SAE巴哈赛车系列赛是由汽车工程师协会负责举办的一项学生方程式赛车比赛，要求每个团队在一年的时间内制造出一辆在加速、刹车、操控性方面有优异的表现并且足够稳定耐久，能够成功完成规则中列举的所有项目业余休闲赛车。密苏里大学哥伦比亚分校SAE巴哈赛车团队正在为下次比赛设计一款新赛车。为了帮助团队完成赛车设计与准备，我们组的主要设计任务为后刹车轮毂装配体。我们设计了三个初步待选轴毂方案，每个方案都满足后盘式制动器的安装和现有赛车框架的连接等条件。通过考虑与比较每个方案的加工可行性以及对每个方案进行的有限元分析，团队将选择一个最适合赛车的方案进行制造。后刹车毂最后是由6061-T6511铝制成的，可以成功安装北极星盘式制动器和嵌入现有的赛车框架中。

关键词：Baja赛车；轴毂设计；轮毂配合；刹车盘配合；制动性能；有限元分析

Abstract

The University of Missouri-Columbia Baja SAE team is designing a vehicle for the SAE Baja Series competition in April of 2016. The SAE Baja series is a competition that simulates real-world engineering challenges. Each team is responsible for designing and building a single-seat, all-terrain vehicle. The vehicle’s performance will be judged on several criteria: speed, handling, ride and ruggedness over off road conditions through dynamic competitions. In order to help prepare the car for competition our teams focus was the rear braking hub assembly. The team designed three preliminary hub concepts that would be able to install the rear disc brakes and compatible to connect to the existing frame. With machining constraints in mind and though FEA analysis, the team was able to decide on which would work best for the Baja vehicle. The final rear braking hub design is built from 6061-T6511 aluminum that is able to mount 2011 Polaris Outlaw disc brakes onto it and connects with the existing frame.

Key Words: Baja racing car; hub design; wheel hub matching; brake disc matching; braking performance; finite element analysis

目录

第1章 绪论..................................................................1

1.1 问题陈述和项目目标.....................................................1

1.1.1 问题陈述............................................................1

1.1.2 项目目标............................................................1

1.2 目的及意义.............................................................1

1.2.1 国内外研究现状......................................................1

1.2.2 研究目的............................................................2

1.2.3 研究意义............................................................2

第2章 研究（设计）的基本内容、目标、拟采用的技术方案及措施..................3

2.1 基本内容...............................................................3

2.2 目标...................................................................3

2.3 技术方案...............................................................3

2.3.1 方案一..............................................................3

2.3.2 方案二..............................................................3

2.3.3 方案三..............................................................3

2.4 措施...................................................................4

2.5 进度安排...............................................................4

第3章 设计前准备工作........................................................5

3.1 设计过程...............................................................5

3.2 信息采集...............................................................5

3.3 开支分析...............................................................7

3.4 设计约束...............................................................8

第4章 设计理念..............................................................9

4.1 概念设计一.............................................................9

4.2 概念设计二............................................................10

4.3 概念设计三............................................................11

4.4 最终设计..............................................................12

第5章 设计后综合分析.......................................................14

5.1 有限元分析............................................................14

5.2 工艺制造性分析........................................................16

5.3 制动原理与性能分析....................................................17

5.3.1 相关参数...........................................................17

5.3.2 制动过程...........................................................17

5.3.3 受力分析...........................................................17

5.3.3.1 对于前后轴上载荷的分析.........................................17

5.3.3.2 对于车轮的受力分析.............................................18

5.3.4 能量转化分析.......................................................20

5.3.5 制动性能评估.......................................................21

5.4 潜在缺陷及其影响分析..................................................22

第6章 建议与结论...........................................................23

6.1 不足与建议............................................................23

6.2 全文总结..............................................................23

致谢........................................................................24

参考文献....................................................................25

附录A......................................................................27

附录B......................................................................28

附录C......................................................................29