本文選題：礦用自卸車 + 后橋殼��； 參考：《西安工業(yè)大學》2014年碩士論文

【摘要】：隨著近年來經(jīng)濟的快速發(fā)展,人們對資源的需求亦與日俱增。作為大型露天礦石場所運輸工具的主力軍,大噸位礦用自卸車的市場需求迅速提高。由于國內(nèi)技術的相對滯后,國內(nèi)在很長一段時間內(nèi)對礦用自卸車的需求主要依賴進口,為了改變這種格局,某公司成功研發(fā)了具有自主知識產(chǎn)權的KZ492型240噸大型礦用自卸車。 后橋殼作為礦用自卸車的主要承載部件之一,其性能的好壞一定程度上決定了整車的質(zhì)量。對于新產(chǎn)品的研發(fā)設計不可能通過大量的重復試驗來獲得產(chǎn)品性能的品質(zhì),因此,本文借助先進的虛擬仿真技術,對后橋殼的靜動態(tài)特性和疲勞壽命進行了數(shù)值仿真分析。 本文首先利用ADAMS/View模塊,依據(jù)多體系統(tǒng)動力學原理,建立了礦用自卸車的整車模型,對三種工況下的自卸車進行了動力學分析,輸出了后橋殼承載部位的受力曲線。 然后建立了后橋殼有限元分析模型,根據(jù)動力學分析結果,對后橋殼進行了靜力學分析,并將其應力結果與試驗結果進行了對比分析,得出兩者誤差在工程允許范圍之內(nèi),從而驗證了該模型的準確性。另外,根據(jù)第四強度理論,對后橋殼進行了強度校核,三種工況下的安全系數(shù)均大于1。同時,還對后橋殼的動態(tài)特性進行了數(shù)值仿真模擬,得出了前16階模態(tài)分析的頻率和振型。 最后,借助MSC.Fatigue商業(yè)軟件,對正常工況和極限工況下的后橋殼疲勞壽命進行了分析,得知后橋殼正常工況下的疲勞壽命能夠滿足使用要求,并且對不滿足要求的后橋殼極限工況下疲勞壽命進行了優(yōu)化分析。同時,本文還研究了后橋殼疲勞壽命對載荷變化的靈敏性,發(fā)現(xiàn)其對后橫拉桿和懸架支撐處的反作用力比較敏感。
[Abstract]:With the rapid development of economy in recent years, people's demand for resources is increasing day by day. As the main force of large-scale open-air ore site transportation, the market demand of large-tonnage dump truck is increasing rapidly. Because of the relative lag of domestic technology, the domestic demand for mine dump truck mainly depends on import for a long time. In order to change this pattern, a company has successfully developed the KZ492 type 240-ton large mine dump truck with independent intellectual property rights. As one of the main bearing parts of mine dump truck, the rear axle shell determines the quality of the whole truck to a certain extent. It is impossible to obtain the quality of the new product by a large number of repeated tests. Therefore, the static and dynamic characteristics and fatigue life of the rear axle shell are numerically simulated with the help of advanced virtual simulation technology. In this paper, based on the dynamic principle of multi-body system and Adams / View module, the whole truck model of mine dump truck is established, and the dynamic analysis of the dump truck under three working conditions is carried out, and the loading curve of the bearing part of the rear axle shell is outputted. Then the finite element analysis model of the rear axle shell is established. According to the dynamic analysis results, the static analysis of the rear axle shell is carried out, and the stress results are compared with the test results, and the error between the two is within the allowable range of the project. The accuracy of the model is verified. In addition, according to the fourth strength theory, the strength of the rear axle shell is checked. At the same time, the dynamic characteristics of the rear axle shell are simulated, and the frequency and mode shape of the first 16 order modal analysis are obtained. Finally, with the help of MSC.Fatigue commercial software, the fatigue life of the rear axle shell under normal and limiting conditions is analyzed, and it is found that the fatigue life of the rear axle shell under normal working conditions can meet the requirements. The fatigue life of the rear axle shell is optimized under the limit condition. At the same time, the sensitivity of the fatigue life of the rear axle shell to the load variation is also studied, and it is found that it is sensitive to the reaction force of the rear transverse tension bar and the suspension support.
【學位授予單位】：西安工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TD422

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