汽车振动分析三自由度.docxVIP

汽车振动分析三自由度

目录

1.汽车振动分析概述........................................3

1.1振动分析的意义.......................................4

1.2振动分析的步骤.......................................5

1.3振动分析的目的.......................................6

2.三自由度振动系统的基础知识..............................7

2.1自由度与多自由度系统.................................9

2.2线性振动系统........................................10

2.3三自由度系统的特征..................................11

3.三自由度振动系统的数学模型.............................12

3.1平衡方程............................................13

3.2运动方程............................................14

3.3自由振动和受迫振动..................................15

4.三自由度振动系统的响应分析.............................16

4.1模态分析............................................17

4.2振型和频率..........................................18

4.3振型叠加原理........................................19

4.4谐响应分析..........................................20

5.汽车振动分析的三自由度模型.............................21

5.1汽车悬架系统........................................22

5.2汽车底盘振动........................................23

5.3三自由度模型建立....................................25

5.4模型参数的确定......................................26

6.振动分析中的参数优化...................................27

6.1悬挂系统参数优化....................................28

6.2汽车稳定性分析......................................29

6.3隔振器选型..........................................30

7.实验验证与数据分析.....................................31

7.1振动数据采集........................................32

7.2数据分析方法........................................34

7.3实验结果验证........................................36

8.实际应用举例...........................................37

8.1汽车NVH控制.........................................38

8.2偏航振动控制系统....................................40

8.3车辆平顺性提升......................................42

9.结论与展望.............................................42

9.1研究成果总结........................................44

9.2未来研究方向........................................4