当车轮在轨道上运行时,因轨道不平顺而受到冲击,轮内往往产生很大的冲击应力,并由此导致车轮的破坏。为了探讨这种冲击应力对车轮的影响,我们做了模拟试验,观察车轮受冲击的瞬间应力波在轮内的传播情况。试验时用一个带中心圆孔的聚碳酸酯圆盘,内孔支承于刚度很大的三角支架上,外缘沿半径方向作用冲击力,此时恰似一个倒置的受到来自轨道冲 When the wheel runs on the track, it is impacted due to the track irregularity, and a large impact stress is often generated in the wheel, and thus the wheel is damaged. In order to investigate the effect of such impact stress on the wheel, we conducted a simulation test to observe the propagation of the instantaneous stress wave in the wheel affected by the wheel. A polycarbonate disk with a central circular hole was used for the test. The inner hole was supported on a very rigid triangular support. The outer edge acted on the impact force in the radial direction. At this time, it resembled an inverted one.