本文選題：鐵路軸箱軸承　切入點(diǎn)：有限元　出處：《武漢科技大學(xué)》2012年碩士論文　論文類型：學(xué)位論文

【摘要】：列車軸箱系統(tǒng)作為列車的核心組成部分對列車的安全運(yùn)行起著至關(guān)重要的作用。隨著我國列車的提速，對軸箱軸承的受力情況與熱問題進(jìn)行研究具有重要意義。 以鐵路軸箱雙列圓柱滾子軸承為研究對象，建立有限元模型，用于研究其在服役狀態(tài)下的接觸應(yīng)力行為表現(xiàn)。在這個(gè)模型中，滾子采用對數(shù)母線型，可參數(shù)化改變滾子的凸度量。數(shù)值分析結(jié)果表明：滾子為直母線型時(shí)，滾子兩端處將產(chǎn)生較大的邊緣集中力。隨著凸度量的增大，邊緣應(yīng)力將逐步減��；當(dāng)凸度量增加到16μm時(shí)，接觸應(yīng)力開始緩慢增大，此時(shí)接觸應(yīng)力分布呈橢圓形。 本文還建立了高速鐵路客車雙列圓錐滾子軸承有限元模型，，在不同軸向力的作用下，研究其對接觸應(yīng)力分布的影響；另外，研究了軸承在溫度場環(huán)境中的應(yīng)力表現(xiàn)。結(jié)果表明：軸向力使軸承負(fù)載分布向滾子受壓端集中，當(dāng)軸向力大到一定值時(shí)，另一列滾子將脫離接觸。在溫度場與外載荷的共同作用下，軸承的接觸應(yīng)力大大增加了。 得出結(jié)論：在設(shè)計(jì)過程中，滾子采用對數(shù)母線型和合理的凸度量能減少滾子邊緣應(yīng)力；在使用過程中要保證軸承的良好潤滑，防止軸承因溫升導(dǎo)致接觸應(yīng)力過大軸承壽命縮短的狀況。
[Abstract]:As the core component of the train, the train axle box system plays an important role in the safe operation of the train. With the increase of train speed in our country, it is of great significance to study the bearing force and heat problems of the axle box bearing. Taking the double-row cylindrical roller bearing of railway axle box as the research object, a finite element model is established to study the behavior of contact stress in service. In this model, the roller is of logarithmic generatrix type. The results of numerical analysis show that when the roller is of a direct generatrix type, a large edge concentration force will occur at both ends of the roller. With the increase of the convex metric, the edge stress will gradually decrease, and when the convex metric is increased to 16 渭 m, The contact stress began to increase slowly, and the distribution of contact stress was elliptical. The finite element model of double-row tapered roller bearings for high-speed railway passenger cars is also established in this paper. The influence of different axial forces on the contact stress distribution is studied. The stress behavior of the bearing in the temperature field is studied. The results show that the axial force causes the bearing load distribution to be concentrated at the roller compression end, and when the axial force is large enough to a certain value, The other roller will be disconnected. The contact stress of the bearing increases greatly under the combined action of the temperature field and the external load. It is concluded that in the design process, the roller can reduce the edge stress by using logarithmic generatrix and reasonable convex metric. To prevent the bearing due to temperature rise due to excessive contact stress bearing life shortened.
【學(xué)位授予單位】：武漢科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH133.33;U270.3

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