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利用非Hertz滚动接触理论,应用数值方法CONTACT,分别计算了我国列车常用的两种车轮踏面(磨耗型和锥形)在列车静态接触情况下曲线半径、横移量和轮对摇头角对接触斑总面积和粘/滑区占接触斑总面积比重的影响。经过计算分析表明:在各种工况下,锥形踏面的接触斑总面积都大于相应磨耗型的,随着钢轨曲线半径的增大,接触斑面积无变化,粘着系数增大,接触斑中粘着区所占面积比重减小;当横移量增大到10 mm时,接触斑面积骤减,粘着占总面积比重亦骤减,进入全滑动区,出现爬轨;随着轮对摇头角的变化,接触斑面积几乎无变化,当轮对摇头角大于0.4°时,接触斑处于全滑动状态,粘着占总面积比重骤减。
By using the non-Hertz rolling contact theory and the numerical method CONTACT, the curves of the radius, the traverse and the turning angle of the two wheel treads (wear-type and cone-shape) commonly used in Chinese trains are calculated respectively. The effect of the total area and the total area of the stick / slip zone on the total area of the contact patch. The calculation and analysis show that under all conditions, the total area of the contact spots on the conical tread is larger than that of the corresponding wear type. As the radius of the rail curve increases, the contact patch area does not change and the adhesion coefficient increases. The area of adhesive area decreases; when the amount of translocation increases to 10 mm, the area of contact patch decreases sharply, and the proportion of adhesive area to total area decreases sharply, entering the whole sliding area and climbing track appears; The area of contact patch has almost no change. When the angle of the wheelset is greater than 0.4 °, the contact patch is in full sliding state, and the proportion of sticking to the total area decreases drastically.