Abstract: The article presents the results of research on the method of monitoring and diagnosing damage to suspension components of rail vehicles from the position of the wagon deck. At the conceptual stage, this method was subjected to a simulation assessment, and example analysis results and conclusions were presented. Two rail vehicle models were used – a passenger wagon model and a freight wagon model.1. INTRODUCTION
The mechanical causes of a decrease in the level of train traffic safety can be divided into two groups. The first group includes damage related to vehicles constituting the train consist (locomotive, wagons), the second group relates to the track. The methods used so far to monitor this damage consist of recording appropriate quantities in the form of vibration signals of vehicle and/or track components or acoustic signals generated by a moving train. These signals can be recorded at stationary stations (e.g., trackside) or on-board (installed on the train or wagon). It should be noted that the monitoring that is the subject of our interest does not concern the functional part of the train, which is important from the user’s point of view (e.g., ventilation, air conditioning, lighting operation, opening and closing doors, etc.). We are interested in the technical condition of the running gear of rail vehicles during their operation and other important mechanical elements responsible for the safety of driving vehicles on the track.
Simulation studies of the dynamic properties of vehicles were carried out with on-board monitoring in mind, i.e., the possibility of recording diagnostic signals at appropriate locations on the vehicle while in motion.
2. MATHEMATICAL MODEL
In the simulation studies, models of a passenger wagon and a freight wagon were used, along with an appropriate track model. The excitations for this rail vehicle-track system are mainly kinematic in nature; the source of the excitations is the geometric irregularities of the track adopted based on measurements.
2.1. Passenger wagon model
For the simulation model, the parameters of a passenger wagon manufactured by HCP/ABB Henschel with a standard according to UIC – Z1B (letter designation Bdmnu) were adopted. (…)
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Source: Logistyka Magazine