The aim of this paper is to present the results coming from an experimental campaign aimed at the definition of the vibrations acting on a powered and a trailer bogie of a railway vehicle for mass rapid transit during commercial service. The results, coming from multiple sensors placed in specific points of the two wheelsets, can give a significative overview of the dynamic behaviour of the two components, highlighting, when present, notable differences. The available sensors gave the possibility to justify and correlate these differences to specific characteristics of the bogies considered. The study stresses the presence of peculiar cyclic solicitations that the wheels and the wheelset undergo during their service. A deeper investigation of the outcoming signals has been carried out keeping into consideration the frequency content associated to the specific measurement system in use. The results of the experimental campaign highlight that powered wheelsets may experience significant high-frequency vibrations induced by gear pairs. The implications of these findings may represent a significant argumentation in the discussion of the design requirements of wheelsets and wheels.

本文的目的是展示一项实验活动的结果，该活动旨在定义商业服务期间铁路车辆的动力和拖车转向架上的振动。来自放置在两个轮对特定点的多个传感器的结果可以对两个组件的动态行为进行有意义的概述，并在存在时突出显示显着差异。可用的传感器有可能证明这些差异是合理的，并将这些差异与所考虑的转向架的特定特性相关联。该研究强调了车轮和轮对在使用过程中所经历的特殊循环请求的存在。考虑到与使用的特定测量系统相关的频率内容，对输出信号进行了更深入的调查。实验活动的结果表明，动力轮对可能会经历由齿轮副引起的显着高频振动。这些发现的含义可能代表了在讨论轮对和车轮的设计要求时的重要论据。