轨头内弹塑性接触应力场与工况参数

Interrelation between Case Parameters and Elasto Plastic Stress Field in Rail Head

随着高速、重载铁路的发展，钢轨的承载能力以及工况参数对它的影响问题受到越来越多的专家学者的关注。本文着重讨论摩擦系数、轴重对轨头内弹塑性接触应力场的影响，横移量与摇头角的影响将不作详细讨论。研究得到，横移量是影响轨头内弹塑性接触应力场的最关键的工况参数，轴重的影响也是很大的，次之是摩擦系数。

With the trend towards high speeds and heavy loads, more and more people pay close attention to the load ability of rail and the effects of the case parameters. The paper deals emphatically with the effects of case parameters (lateral displacement, yaw angle, friction coefficient, axial load) on elasto plastic stress field in rail head, while the effects of lateral displacement and yaw angle will not be dealt with in detail. The research shows the following results. As concerning the factors determining the contact stress field of the rail, the paper shows that the most important factor is the lateral shift, axle load is the second, friction coefficient is the third, and the yaw angle is the last.