【摘要】：汽車動(dòng)力總成振動(dòng)是汽車的主要振動(dòng)激勵(lì)源之一,該振動(dòng)對(duì)汽車的平順性、乘坐舒適性等NVH性能影響巨大。動(dòng)力總成懸置系統(tǒng)設(shè)計(jì)合理則作用顯著,不僅可以明顯地減振降噪、改善汽車的乘坐舒適性,而且還能減緩動(dòng)力總成與其它部件的損壞。在合理布置懸置系統(tǒng)的過程中,懸置系統(tǒng)的解耦優(yōu)化設(shè)計(jì)與隔振優(yōu)化是十分重要的。本文以某款國(guó)產(chǎn)增程式電動(dòng)轎車功能樣車為研究對(duì)象,主要研究其動(dòng)力總成懸置系統(tǒng)的解耦、隔振性能及其優(yōu)化。通過查閱大量文獻(xiàn)資料,結(jié)合增程式電動(dòng)汽車懸置系統(tǒng)的特點(diǎn)分析該樣車振動(dòng)的主要激勵(lì)力,根據(jù)實(shí)際模型的各項(xiàng)參數(shù)通過在Adams/View模塊里建立動(dòng)力總成懸置系統(tǒng)六自由度實(shí)體模型,并在Adams/Vibration模塊下分析得出懸置系統(tǒng)的解耦度并進(jìn)行優(yōu)化仿真分析。為了驗(yàn)證Adams仿真的正確性,進(jìn)行實(shí)車試驗(yàn),試驗(yàn)結(jié)果與Adams仿真中的結(jié)果誤差不超過±10%。然后以懸置剛度和位置坐標(biāo)為優(yōu)化變量以懸置系統(tǒng)能量解耦為目標(biāo)函數(shù)進(jìn)行優(yōu)化仿真,優(yōu)化前后的解耦性能顯示,優(yōu)化后動(dòng)力總成懸置系統(tǒng)的能量耦合程度大大降低,基本滿足要求。最后為了得到隔振性能優(yōu)越的懸置系統(tǒng),在隔振理論的基礎(chǔ)上,通過試驗(yàn)測(cè)試出原狀態(tài)懸置系統(tǒng)的隔振性能,分析出各個(gè)懸置的問題所在,給出懸置系統(tǒng)的整改方案并進(jìn)行試驗(yàn)驗(yàn)證,最終得出性能較優(yōu)的懸置系統(tǒng)。
[Abstract]:The vibration of automobile powertrain is one of the main vibration excitation sources of automobile. The vibration has a great influence on the ride comfort and NVH performance of the vehicle. The reasonable design of powertrain mount system can not only reduce vibration and noise obviously, improve the ride comfort of automobile, but also slow down the damage of power assembly and other parts. The decoupling optimization design and vibration isolation optimization of the mounting system are very important in the process of reasonably arranging the mount system. This paper focuses on the decoupling, vibration isolation and optimization of the powertrain mount system for a functional prototype of a domestic extended range electric car. By consulting a large number of documents and combining with the characteristics of the mounting system of the extended range electric vehicle, the main excitation force of the vibration of the prototype vehicle is analyzed. According to the parameters of the actual model, the six-degree-of-freedom solid model of the powertrain mount system is established in the Adams/View module, and the decoupling degree of the mount system is obtained under the Adams/Vibration module and the optimization simulation analysis is carried out. In order to verify the correctness of Adams simulation, the actual vehicle test is carried out. The error between the test results and the results in Adams simulation is less than 鹵10. Then the optimal simulation is carried out with the mounting stiffness and position coordinates as the optimization variables and the energy decoupling of the mount system as the objective function. The decoupling performance before and after the optimization shows that the energy coupling degree of the powertrain mount system is greatly reduced after the optimization. Basically meet the requirements. Finally, in order to obtain the mount system with superior vibration isolation performance, on the basis of vibration isolation theory, the vibration isolation performance of the original state mount system is tested through experiments, and the problems of each mounting system are analyzed. The improvement scheme of the mount system is given, and the test is carried out. Finally, the better performance of the mount system is obtained.
【學(xué)位授予單位】：長(zhǎng)安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：U469.72

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