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首页> 外文期刊>Optics and Lasers in Engineering >Laser Measurement Of Torsional Vibrations/longitudinal Creepage Of A Railway Wheel Set On A Scaled Test Bench
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Laser Measurement Of Torsional Vibrations/longitudinal Creepage Of A Railway Wheel Set On A Scaled Test Bench

机译：在比例试验台上用激光测量铁路车轮组的扭转振动/纵向蠕变

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摘要

Since more than one century, test benches remain an essential tool to study various aspects of the railway dynamics such as for instance running stability, safety or even ride comfort. For each of these applications, the knowledge of the contact conditions (forces and relative displacements) between the wheel and the rail is a necessary condition to develop a sound understanding of the physical phenomena. More specifically, as soon as the longitudinal dynamics of the vehicle-track system is involved in the study (like for the performance of a locomotive, the rolling noise or rail corrugation), a precise measure of the longitudinal creepage between the wheel and the rail is needed to verify numerical predictions from theoretical models. In this paper, we focus on the measurement of torsional vibrations of a scaled wheel set which is rolling on a roller (representing infinite rails). First, a theoretical overview of the conditions under which these torsional vibrations are excited is given. Then, the experimental set-up used to study the phenomenon is presented. During the experiment, the wheel set torsional vibrations are measured using the rotational laser Doppler vibrometer, and the measure is used to calculate the longitudinal creepage of the wheel. Results are compared with outputs of a multi-body model of the test bench.
机译：自一个多世纪以来，试验台仍然是研究铁路动力学各个方面的重要工具，例如行驶稳定性，安全性或行驶舒适性。对于这些应用程序中的每一个，了解车轮和轨道之间的接触条件（力和相对位移）是了解物理现象的必要条件。更具体地说，只要研究中涉及了车辆履带系统的纵向动力学特性（例如机车的性能，滚动噪声或轨道波纹），就可以精确测量车轮与轨道之间的纵向爬电距离需要验证理论模型的数值预测。在本文中，我们专注于在滚轮（代表无限轨道）上滚动的比例轮对的扭转振动的测量。首先，给出了这些扭转振动被激发的条件的理论概述。然后，提出了用于研究该现象的实验装置。在实验过程中，使用旋转激光多普勒振动计测量轮对扭转振动，并将该测量值用于计算轮的纵向蠕变。将结果与测试台的多体模型的输出进行比较。

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