A Study on the Vibration Isolation Characteristics of an Ant

发布时间：2021-04-25 05:05

　　本论文提出了一种新型反共振气动隔振悬架系统。这种悬架系统由活塞、油腔、油管和气室组成。气室和油腔由油管连接。在某一频率下,油管中流体运动所产生的惯性力能够抵消气动弹簧力的作用,从而使得作用在车体上的动态力接近零,从而使得悬架系统具有良好的隔振效果。论文推导出悬架系统的数学模型,并采用摄动法求解非线性问题。给出了一阶谐振和二阶谐振的解。对于低频振动,本文提出的反共振气动悬架系统的隔振性能比传统弹簧-阻尼悬架系统要优越,且具有较宽的隔振频带。通过调节油管的长度和直径可获得不同的最优隔振频率（反共振频率）和隔振带宽。对于一阶谐振,当增加油管的长度时,可降低最优隔振频率,但也会降低隔振带宽。减小油管长度,可增大隔振带宽,但会提高最优隔振频率。油管直径对隔振带宽的影响也很大。当油管直径减少时,在低频振动区的隔振带宽可增大。当油管直径增大时,隔振带宽会有所减少。二阶谐振的幅值随着振动频率的增加而减少。将二阶谐振的幅值与一阶谐振进行比较,发现在反共振频率附近,一阶谐振幅值低于二阶谐振。而当振动频率高于或低于反共振频率时,二阶谐振幅值都远低于一阶谐振幅值。因此,在反共振频率附近,二阶谐振的影响不能忽略... 

【文章来源】：厦门理工学院福建省

【文章页数】：76 页

【学位级别】：硕士

【文章目录】：
摘要
Abstract
Chapter 1 Introduction
    1.1 Background
    1.2 Literature review
    1.3 Benefits and drawbacks of our model
    1.4 Comparison of our model with the traditional suspension model
Chapter 2 A mathematical model of the hydro pneumatic suspension system
    2.1 Problem definition
    2.2 The motion equation of the piston
        2.2.1 Static analysis
        2.2.2 Dynamic analysis
    2.3 The pressure variation of the air in the chamber
    2.4 The model of the oil flow
Chapter 3 Linear Analysis of the hydro pneumatic suspension system
    3.1 The motion of the piston
    3.2 Excitation force acted on the piston
    3.3 The vibration of the vehicle
    3.4 Effect of air chamber volume
Chapter 4 Nonlinear Analysis of the hydro pneumatic suspension system
    4.1 Perturbation method
    4.2 High harmonic vibration
Chapter 5 Comparison between the presented model and other models
    5.1 Comparison of the presented model with the traditional hydro pneumatic suspension system
    5.2 Comparison of the presented model with steel spring anti-resonant model
Chapter 6 Conclusion and future work
    6.1 Conclusion
    6.2 Future work
References
Acknowledgment
List of Publications
Index



本文编号：3158760