本文關(guān)鍵詞：基于ANSYS的起重機(jī)回轉(zhuǎn)支承接觸問(wèn)題的有限元分析　出處：《西南交通大學(xué)》2011年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 回轉(zhuǎn)支承 有限元分析 接觸問(wèn)題

【摘要】：回轉(zhuǎn)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(yīng)用于工程機(jī)械等領(lǐng)域,是工程機(jī)械的關(guān)鍵部件之一�；剞D(zhuǎn)支承是依靠滾動(dòng)體與內(nèi)、外圈的滾動(dòng)接觸來(lái)支撐轉(zhuǎn)動(dòng)部件并傳遞力和運(yùn)動(dòng)的,因此,接觸問(wèn)題是研究回轉(zhuǎn)支承的基礎(chǔ),直接影響著回轉(zhuǎn)支承的承載能力和使用壽命。接觸問(wèn)題是一種高度非線性問(wèn)題,本文利用有限元法對(duì)回轉(zhuǎn)支承的接觸問(wèn)題進(jìn)行了分析,其具體內(nèi)容和結(jié)果如下： 論文首先總結(jié)了國(guó)內(nèi)外回轉(zhuǎn)支承的發(fā)展概況和接觸問(wèn)題有限元分析的研究現(xiàn)狀,對(duì)回轉(zhuǎn)支承的接觸問(wèn)題以及有限元法進(jìn)行了全面的介紹,并提出了分析回轉(zhuǎn)支承接觸問(wèn)題的有限元方法。 其次以QY25型汽車起重機(jī)的回轉(zhuǎn)支承為例,通過(guò)起重機(jī)各種不同的作業(yè)工況來(lái)分析回轉(zhuǎn)支承的受力情況,得出起重機(jī)工作時(shí)的工作幅度和起重載荷對(duì)回轉(zhuǎn)支承的受力影響較大。并運(yùn)用赫茲接觸理論計(jì)算了某一工況下回轉(zhuǎn)支承的滾動(dòng)體與內(nèi)、外圈的最大接觸應(yīng)力與接觸橢圓的大小,為后文進(jìn)行有限元分析時(shí)確定接觸區(qū)域單元尺寸的大小和接觸對(duì)的創(chuàng)建提供理論依據(jù)。 最后運(yùn)用ANSYS有限元分析軟件對(duì)QY25型汽車起重機(jī)的回轉(zhuǎn)支承進(jìn)行了接觸分析,并將有限元分析結(jié)果與赫茲接觸理論計(jì)算結(jié)果的進(jìn)行比較,進(jìn)一步驗(yàn)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(shí)還對(duì)兩種結(jié)果進(jìn)行了誤差分析,結(jié)果表明采用數(shù)值法(有限元分析)求解接觸問(wèn)題更加方便、直觀、準(zhǔn)確。并在此基礎(chǔ)上分析了橢圓形滾道回轉(zhuǎn)支承滾動(dòng)體與內(nèi)、外圈的接觸情況,通過(guò)同種工況下兩種類型滾道的接觸應(yīng)力的對(duì)比分析,得出橢圓形滾道回轉(zhuǎn)支承的承載能力比圓形滾道回轉(zhuǎn)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(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2011
【分類號(hào)】：TH21

【引證文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前3條

1 張青元;拖拉機(jī)齒輪泵的輪齒應(yīng)力分析及優(yōu)化設(shè)計(jì)[D];西北農(nóng)林科技大學(xué);2012年

2 周強(qiáng);支臂式電動(dòng)玻璃升降器結(jié)構(gòu)設(shè)計(jì)與有限元分析[D];山東大學(xué);2012年

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

，

本文編號(hào)：1434165