Open AccessExperimental Verification of Method to Synthesize the Track Vertical Irregularities
Author(s) -
Mădălina Dumitriu,
Ionuţ Radu Răcănel
Publication year - 2018
Publication title -
romanian journal of transport infrastructure
Language(s) - English
Resource type - Journals
ISSN - 2286-2218
DOI - 10.2478/rjti-2018-0011
Subject(s) - track (disk drive) , bogie , root mean square , range (aeronautics) , axle , autocorrelation , geodesy , computer science , acoustics , geology , structural engineering , mathematics , physics , engineering , aerospace engineering , quantum mechanics , operating system , statistics
The paper focuses on the experimental verification of the results derived from numerical simulations, based on a model of the bogie-track system, where the vertical track irregularities are introduced in the form of a pseudorandom function. This function comes from an original method of synthesizing the vertical track irregularities, depending on the geometric quality of the track and on the velocity. To verify the method, the root mean square (RMS) of the simulated accelerations in the axles and the bogie frame against each axle is compared to the experimental accelerations within the frequency range of wavelengths of the track vertical irregularities from 3 to 120 m. The results have shown a good correlation between the simulated RMS accelerations for a low quality track and the measured RMS accelerations.