摘要



作為汽車的主要承載件和傳力件，驅(qū)動橋橋殼支撐著汽車的荷重，并將載荷傳給車輪。作用在驅(qū)動車輪上的牽引力、制動力和側(cè)向力，也是經(jīng)過橋殼傳到懸掛及車架或者車廂上。根據(jù)經(jīng)驗(yàn)和理論研究，引起橋殼破壞的主要原因是作用在橋殼上的、由路面不平度引起的沖擊力和各種復(fù)雜工況下的作用力。



    由于汽車的行駛工況比較復(fù)雜，驅(qū)動橋橋殼的強(qiáng)度和動態(tài)性能直接影響汽車運(yùn)行安全，合理地設(shè)計(jì)橋殼也是提高汽車平順性和舒適性的重要措施之一。因此，必須對橋殼強(qiáng)度、剛度和動態(tài)特性進(jìn)行力學(xué)分析。



    本文以有限元法動態(tài)分析理論為基礎(chǔ)，將CAD軟件Pro/E和有限元分析軟件結(jié)合起來完成了從驅(qū)動橋三維建模到有限元分析的整個過程，得出了他在自由約束狀態(tài)的前16階固有頻率和振型，證明該橋殼在在各種行駛工況下不會引起共振。



關(guān)鍵詞：驅(qū)動橋橋殼；ANSYS；模態(tài)分析





 





 





 





 





 





 





 





 





 





 





 









Abstract



    As the mainly load-bearing and force-transmitting component of the vehicle, the automotive drive axle housing bears the weight of vehicle and transfers the force to the wheel. By the drive axle housing, the traction force, braking force and lateral force acted on the wheel are transferred to the suspension system, frame or carriage. According to the experience and the vibration theory, the crash of the axle housing is induced by the pulse of the road surface roughness and the complex forces from the different hard work condition.



Because the driving condition of the vehicle is very complex, the strength and dynamic performance of the drive axle housing affect the operation safety of the vehicle. The reasonable design of the drive housing is one of the importance ways to improve the ride comfort.  Thus, it is necessary to analyze the strength,  rigidity  and  dynamic performance of the drive axle housing.



    Based on dynamic theory of the finite element method, the 3D model of the drive axle housing is established in the Pro/E. on the basis of this model, the FEA is simulated in computer under the circumstance of ANSYS to get the results of stress distribution, deformation and the first sixteen natural frequency and vibration shape under the free constraint. The results shows the axle housing meets the strength demand, it is reliable under all kinds of driving conditions and can't cause resonance of the housing, then based on the FEA, to optimize the housing by use of ANSYS.



Keywords：drive axle housing；ANSYS；model





 





 





 





 





 





 









目錄



內(nèi)容摘要………………………………………………………………………………………



ABSTRACT………………………………………………………………………………………



1  緒論…………………………………………………………………………………………



1.1  引言…………………………………………………………………………………



1.2  研究背景………………………………………………………………………………



1.3  國內(nèi)外研究現(xiàn)狀……………………………………………………………………



1.4  選題的目的和意義……………………………………………………………………



1.5  課題的提出和研究內(nèi)容………………………………………………………………



2  有限元法理論………………………………………………………………………………



2.1  有限元法的概述………………………………………………………………………



2.1.1  有限元法的發(fā)展概況…………………………………………………………



2.1.2  有限元法基本思想及分析過程………………………………………………



2.1.3  有限元法分析特點(diǎn)和流程……………………………………………………



2.2  有限元法的應(yīng)用………………………………………………………………………



2.2.1  有限元法在汽車設(shè)計(jì)中的應(yīng)用………………………………………………



2.2.2  有限元法在驅(qū)動橋設(shè)計(jì)中的應(yīng)用……………………………………………



3  汽車驅(qū)動橋的相關(guān)介紹與橋殼的受力典型工況…………………………………



3.1  汽車驅(qū)動橋的相關(guān)介紹………………………………………………………………



3.2  橋殼受力分析…………………………………………………………………………



3.2.1  橋殼的靜彎曲應(yīng)力計(jì)算………………………………………………………



3.2.2  在不平路面沖擊載荷作用下的橋殼受力分析………………………………

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