利用白光数字图像频域分析法测量动荷载作用下有砟轨道的下沉量

Measurement of Subsidence of Ballasted Track under Dynamic Loading Using White Light Digital Image Analysis in Frequency Domain

基于车辆-轨道耦合动力学理论和轨道下沉变形法则,利用白光数字图像频域分析法测量有砟轨道在列车动荷载作用下的下沉量,并分析不同速度列车对道床下沉变形的影响。利用白光数字图像频域分析法测量道床的下沉量,并与理论计算的道床下沉量进行比较,相差较小。与文献[1]实验结果对比可以看出,结果相差较小,所得实验结论与文献[1]结论相同,可验证白光数字图像频域分析法的可用性。白光数字图像频域分析法具有光路简单、操作方便、并能进行近程和远程测量,测量精度高、测量成本低等优点,可推动轨道检测技术的进步。

Based on the vehicle-trackcoupling dynamics theory and track settlement deformation law, white light digital image analysis in frequency domain was used to measure the subsidence of ballasted track under dynamic loading caused by train. The effect of different train speeds on the sinking deformation of the track bed was analyzed. Compared with the subsidence of the track bed concluded by the theoretical calculation, the difference of the subsidence of ballasted track measured by the white light digital image analysis in frequency domain was small. Compared with the experimental results of reference One, it can be seen that the experimental data obtained exhibit minor difference from those obtained by previous studies, and the experimental results are the same as those obtained by previous researchers, which can verify the feasibility of white light digital image analysis in frequency domain. The white light digital image analysis in frequency domain, with the advantages of simple optical path, convenient operation, short and long distance measurement, high accuracy and low cost, can overcome the shortcomings of traditional methods and promote the detection technology of track.