Abstract
The present paper is concentrated on the analysis of in situ vibration measurements during operating conditions in the track structure for loading by current passenger trains at the new built up railway corridor in the section Bratislava - Trnava. Tests were carried out to determine the dynamic track behaviour and relative dynamic effects between the track components - the rails, the sleepers, and the ballast bed during the passage of characteristic passenger trains moving at the operating speeds 70 / 130 km/h. Experimentally obtained signals of the dynamic response of track components - measured as vertical accelerations and displacements of the rails, sleepers, and ballast bed are analysed in detail as the nonstationary random signals corresponding passages of characteristic vehicle bogies (locomotives, coaches). Vertical dynamic response of these components were measured at two different locations of this section and the vertical dynamic behaviour of track components were investigated in the time domain and analysed in the frequency domain up to 500 Hz.
Highlights
Dynamic phenomena in the track structure are associated with the operating conditions and are in the direct relation with the vehicle–track dynamic interaction
Field tests were carried out to determine the dynamic behaviour and relative vertical dynamic effects between the track components – the rails, the sleepers, and the ballast bed during the passage of characteristic passenger and freight trains moving at the operating speeds
In concentrating on the track structure the dynamic effects may be divided into two groups: 1. The vibration of the track structure – the vibration of rails, sleepers, and the ballast layer and the wave propagation in the track structure
Summary
Dynamic phenomena in the track structure are associated with the operating conditions and are in the direct relation with the vehicle–track dynamic interaction. Field tests were carried out to determine the dynamic behaviour and relative vertical dynamic effects between the track components – the rails, the sleepers, and the ballast bed during the passage of characteristic passenger and freight trains moving at the operating speeds. The dynamic phenomena in the track structure are caused by several mechanisms which are well known: – the quasi-static excitation due to the moving axle load of trains, – the wheel and the rail roughness and their defects, – the type of trains loading the track and their composition and speed, – the excitation due to discrete supports of the rail by sleepers, etc
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
