本文關鍵詞：基于ANSYS的起重機回轉支承接觸問題的有限元分析　出處：《西南交通大學》2011年碩士論文　論文類型：學位論文

  更多相關文章： 回轉支承 有限元分析 接觸問題

【摘要】：回轉支承是一種特殊的大型軸承,由于能夠承受綜合載荷的作用,被廣泛地應用于工程機械等領域,是工程機械的關鍵部件之一�；剞D支承是依靠滾動體與內、外圈的滾動接觸來支撐轉動部件并傳遞力和運動的,因此,接觸問題是研究回轉支承的基礎,直接影響著回轉支承的承載能力和使用壽命。接觸問題是一種高度非線性問題,本文利用有限元法對回轉支承的接觸問題進行了分析,其具體內容和結果如下： 論文首先總結了國內外回轉支承的發(fā)展概況和接觸問題有限元分析的研究現(xiàn)狀,對回轉支承的接觸問題以及有限元法進行了全面的介紹,并提出了分析回轉支承接觸問題的有限元方法。 其次以QY25型汽車起重機的回轉支承為例,通過起重機各種不同的作業(yè)工況來分析回轉支承的受力情況,得出起重機工作時的工作幅度和起重載荷對回轉支承的受力影響較大。并運用赫茲接觸理論計算了某一工況下回轉支承的滾動體與內、外圈的最大接觸應力與接觸橢圓的大小,為后文進行有限元分析時確定接觸區(qū)域單元尺寸的大小和接觸對的創(chuàng)建提供理論依據(jù)。 最后運用ANSYS有限元分析軟件對QY25型汽車起重機的回轉支承進行了接觸分析,并將有限元分析結果與赫茲接觸理論計算結果的進行比較,進一步驗證了三維接觸模型的網(wǎng)格劃分、接觸算法及邊界條件等的正確性,同時還對兩種結果進行了誤差分析,結果表明采用數(shù)值法(有限元分析)求解接觸問題更加方便、直觀、準確。并在此基礎上分析了橢圓形滾道回轉支承滾動體與內、外圈的接觸情況,通過同種工況下兩種類型滾道的接觸應力的對比分析,得出橢圓形滾道回轉支承的承載能力比圓形滾道回轉支承的承載能力要高。
[Abstract]:Rotary bearing is a kind of special large bearing, which is widely used in construction machinery and one of the key parts of construction machinery because of its ability to withstand the comprehensive load. The slewing bearing depends on the rolling body and the inside. The rolling contact of the outer ring is used to support the rotating parts and transfer the force and motion, so the contact problem is the basis of the study of the rotary bearing. The contact problem is a highly nonlinear problem. The finite element method is used to analyze the contact problem of the slewing bearing. Its specific content and results are as follows: Firstly, the paper summarizes the development of rotary bearings at home and abroad and the research status of finite element analysis of contact problems, and gives a comprehensive introduction to the contact problems of slewing bearings and the finite element method. A finite element method is proposed to analyze the contact problem of slewing bearings. Secondly, taking the slewing support of QY25 truck crane as an example, the stress of the slewing support is analyzed through various working conditions of the crane. It is concluded that the working range and the lifting load of the crane have great influence on the force of the slewing bearing, and the rolling body and the inner part of the slewing bearing under a certain working condition are calculated by using the Hertz contact theory. The maximum contact stress of outer ring and the size of contact ellipse provide a theoretical basis for determining the size of element in contact area and the establishment of contact pair later in finite element analysis. Finally, the contact analysis of the slewing bearing of QY25 truck crane is carried out by using ANSYS finite element analysis software, and the results of finite element analysis are compared with the results of Hertz contact theory. The accuracy of mesh generation, contact algorithm and boundary conditions of the 3D contact model is further verified. At the same time, the error analysis of the two results is carried out. The results show that the numerical method (finite element analysis) is more convenient, intuitionistic and accurate to solve the contact problem. On this basis, the contact between the rolling body of the elliptical raceway slewing bearing and the inner and outer rings is analyzed. By comparing and analyzing the contact stresses of two kinds of raceways under the same working conditions, it is concluded that the bearing capacity of elliptical raceway slewing bearing is higher than that of circular raceway slewing bearing.
【學位授予單位】：西南交通大學
【學位級別】：碩士
【學位授予年份】：2011
【分類號】：TH21

【引證文獻】

相關碩士學位論文 前3條

1 張青元;拖拉機齒輪泵的輪齒應力分析及優(yōu)化設計[D];西北農(nóng)林科技大學;2012年

2 周強;支臂式電動玻璃升降器結構設計與有限元分析[D];山東大學;2012年

3 顧家禎;回轉支承材料及力學性能研究[D];合肥工業(yè)大學;2012年

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本文編號：1434165