旋转支承钢轮应力分析

Stress Analysis for Turntable Support Wheels

摘要:

以Hertz弹性接触理论和曲梁理论为基础，分析了回转支承空心钢轮的圆周应力对轮轨接触von Mises应力峰值及其位置的影响，通过采用平面应变有限元的进一步分析表明，降低钢轮截面梁高可以提高钢轮的径向柔度，同时圆周应力可以有效地抑制接触正应力、提高钢轮接触强度，但可能使钢轮接触区内von Mises应力峰值点从中间向两侧分离，导致应力循环次数翻倍、影响疲劳强度。至于对接触区内钢轮的剪应力和钢轨的von Mises应力，截面梁高的变化对峰值和位置的影响则不大。

Abstract:

Based on the Hertz contact theory and curve beam theory, the von Mises stress peak value and location were analyzed which is raised in the wheel-rail contact of turntable support hollow wheels, with further analysis using planer strain finite element showed that the decreased wheel section height would increase the wheel flexibility, suppress contact normal stress and raise the wheel strength; but also might cause the peak location of von Mises stress spitted from center of contact area, which could double the stress circulation and reduce wheel fatigue strength. As for the wheel shear stress and rail von Mises stress, there is little influence caused by the variety of wheel section height to the peak value and location.