本文選題：懸置支架 + 有限元分析��； 參考：《沈陽航空航天大學》2016年碩士論文

【摘要】：汽車動力總成的振動是汽車首要的振動源之一,發(fā)生的振動經(jīng)由車架傳遞到駕駛室內(nèi),影響乘員乘坐的舒適性和汽車的NVH特征。懸置支架能最大量隔離發(fā)動機產(chǎn)生的振動傳遞至汽車本身,可以使駕駛室內(nèi)乘員乘車時更加舒適。一方面,懸置支架是安全件和連接件,必須有足夠的強度去保證動力總成安全地裝配于車身上;另一方面,懸置支架必須有較高的模態(tài),避免與動力總成或車身產(chǎn)生共振現(xiàn)象。因而,合理地設(shè)計與安裝懸置支架是汽車動力總成懸置系統(tǒng)研發(fā)的主要組成部分。首先,本文針對某款轎車變速箱后拉桿安裝支架在道路試驗中失效的現(xiàn)象進行合理有效的分析,并分別對懸置系統(tǒng)進行數(shù)學模型與力學模型的建立,利用多體動力學仿真軟件ADAMS分析得到懸置系統(tǒng)的載荷數(shù)據(jù),進而借助仿真分析軟件HyperMesh、MSC.Nastran和HyperView對支架的模態(tài)與應(yīng)力進行分析,判斷其是否滿足產(chǎn)品要求。其次,使用仿真分析HyperWorks板塊中Optistruct單元,采用拓撲優(yōu)化技術(shù)將初步設(shè)計的支架結(jié)構(gòu)進行優(yōu)化分析,以獲得強度最好的結(jié)構(gòu)方案。依照研發(fā)的優(yōu)化方案變動支架的布局,最終生產(chǎn)出性能最優(yōu)的產(chǎn)品。最后,對優(yōu)化后的支架通過MTS試驗臺進行疲勞和破壞試驗來驗證此優(yōu)化方案對該懸置支架性能的提升是有效的。最終通過裝車試驗,對優(yōu)化后的支架NVH各項性能及各個工況進行評測,試驗結(jié)果符合要求,且支架完好無損。得出實驗數(shù)據(jù)供整車廠開發(fā)新款懸置系統(tǒng)使用,有效地證明了此優(yōu)化方法的正確性。本文的研究方法和設(shè)計思路也可用于汽車上的其他零件設(shè)計。
[Abstract]:The vibration of the automobile power assembly is one of the most important vibration sources of the car. The vibration is transmitted to the driving room through the frame, which affects the comfort of the passenger and the NVH characteristics of the car. The mounting bracket can transmit the vibration from the engine to the car itself, which can make the occupant more comfortable in the cab. On the one hand, The mounting bracket is a safety piece and a connector and must have enough strength to ensure that the power assembly is safely assembled on the body; on the other hand, the mounting bracket must have a high mode to avoid resonance with the power assembly or the body. Therefore, the rational design and installation of the mounting bracket is the main research and development of the automotive powertrain suspension system. In order to make up part. First of all, this paper makes a reasonable and effective analysis on the failure phenomenon in the road test of the rear pull rod installation support of a certain type of car transmission, and establishes the mathematical model and mechanical model of the suspension system respectively, and uses the multi body dynamics simulation software ADAMS to analyze the load data of the suspension system, and then with the aid of imitation. The true analysis software HyperMesh, MSC.Nastran and HyperView are used to analyze the modal and stress of the scaffold and determine whether it meets the requirements of the product. Secondly, the Optistruct unit in the HyperWorks plate is simulated and analyzed by using the topology optimization technique to optimize the preliminary design of the scaffold structure to obtain the best structural scheme. Finally, the optimized support through the MTS test bench fatigue and failure test to verify that the optimization scheme is effective to improve the performance of the suspension support. Finally, through loading test, the performance of the optimized support NVH and the various working conditions. The test results conform to the requirements and the support is in good condition. The experimental data is obtained for the use of the new suspension system for the development of the whole vehicle plant, which effectively proves the correctness of the optimization method. The research methods and design ideas of this paper can also be used in the design of other parts on the car.
【學位授予單位】：沈陽航空航天大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：U464.13

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本文編號：1964692