三、圆弧形踏面与钢轨的接触前一部分讲的只是一些基本概念,实际上轮轨接触几何参数对于现代列车-轨道动力学的研究来讲,的确是一个重要的基础课题。在第一节中,曾提到磨耗形踏面有可能使轮对运行性能的各项矛盾的要求得到合理的折衷,但是磨耗形踏面的轮轨接触几何参数比圆锥形踏面要复杂得多,特别是由多段 Third, the arc-shaped tread contact with the rail The first part of the talk about just some of the basic concepts, in fact, wheel and rail contact geometry parameters for the modern train - orbit dynamics is concerned, is indeed an important basic issue. In the first section, mention was made of the possibility of eroding the conflicting requirements of the running performance of the wheel pair with respect to the wear profile, but the geometry of the wheel-rail contact geometry of the worn tread is much more complicated than that of the conical tread, Is composed of multiple sections