重载铁路钢轨磨耗状态下的轮轨法向接触特性
Wheel Rail Normal Contact Characteristics of Heavy Haul Worn Rails
投稿时间:2018-07-05  修订日期:2019-02-26
DOI:10.11908/j.issn.0253-374x.2019.05.010     稿件编号:    中图分类号:U211.5
 
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中文摘要
      基于三维弹性体滚动接触理论,对法向接触问题最小余能方程的影响系数和法向间隙进行修正,使其更适用于非平面接触问题的求解.以某重载铁路通过总重达100 Mt的CHN75型面磨耗钢轨为对象,车轮选取LMA系列原始型面,利用修正后的接触模型,研究在30 t轴重作用下的轮轨法向接触特性.结果表明:轮对横移量对轮轨接触特性影响较大,横移量在+12~+14 mm轮轨接触状态变化显著;其中,横移量在+12.9~+13.2 mm时出现两点接触,横移量增大至+14 mm时出现车轮轮缘和钢轨轨距角的接触.
英文摘要
      Based on Kalker’s three-dimensional elastic rolling contact theory, the influence coefficient and the normal distance in the minimum complementary energy function were modified, making it proper for solving non-planar contact problems. Using the modified contact model, the wheel rail normal contact characteristics at 30 t axle load was studied with a 100 million gross traffic tonnage of CHN75 profile worn rail and an LMA original profile wheel. The results show that the wheel-set lateral displacement has a significant impact on the contact characteristics. Remarkable changes of contact state can be seen at +12mm to +14mm. Two point contact occurs at +12.9mm to +13.2mm, and the contact between wheel flange and rail gauge corner occurs at +14mm.
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