本論文提出了一種新型反共振氣動(dòng)隔振懸架系統(tǒng)。這種懸架系統(tǒng)由活塞、油腔、油管和氣室組成。氣室和油腔由油管連接。在某一頻率下,油管中流體運(yùn)動(dòng)所產(chǎn)生的慣性力能夠抵消氣動(dòng)彈簧力的作用,從而使得作用在車體上的動(dòng)態(tài)力接近零,從而使得懸架系統(tǒng)具有良好的隔振效果。論文推導(dǎo)出懸架系統(tǒng)的數(shù)學(xué)模型,并采用攝動(dòng)法求解非線性問(wèn)題。給出了一階諧振和二階諧振的解。對(duì)于低頻振動(dòng),本文提出的反共振氣動(dòng)懸架系統(tǒng)的隔振性能比傳統(tǒng)彈簧-阻尼懸架系統(tǒng)要優(yōu)越,且具有較寬的隔振頻帶。通過(guò)調(diào)節(jié)油管的長(zhǎng)度和直徑可獲得不同的最優(yōu)隔振頻率（反共振頻率）和隔振帶寬。對(duì)于一階諧振,當(dāng)增加油管的長(zhǎng)度時(shí),可降低最優(yōu)隔振頻率,但也會(huì)降低隔振帶寬。減小油管長(zhǎng)度,可增大隔振帶寬,但會(huì)提高最優(yōu)隔振頻率。油管直徑對(duì)隔振帶寬的影響也很大。當(dāng)油管直徑減少時(shí),在低頻振動(dòng)區(qū)的隔振帶寬可增大。當(dāng)油管直徑增大時(shí),隔振帶寬會(huì)有所減少。二階諧振的幅值隨著振動(dòng)頻率的增加而減少。將二階諧振的幅值與一階諧振進(jìn)行比較,發(fā)現(xiàn)在反共振頻率附近,一階諧振幅值低于二階諧振。而當(dāng)振動(dòng)頻率高于或低于反共振頻率時(shí),二階諧振幅值都遠(yuǎn)低于一階諧振幅值。因此,在反共振頻率附近,二階諧振的影響不能忽略... 

【文章來(lái)源】：廈門理工學(xué)院福建省

【文章頁(yè)數(shù)】：76 頁(yè)

【學(xué)位級(jí)別】：碩士

【文章目錄】：
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



本文編號(hào)：3158760