A COMPARISON OF TIMOSHENKO AND EULER BEAM MODELS FOR TRACK STRUCTURE VIBRATION

摘要

The continuous elastic Timoshenko and Euler beam models on Winkler foundation are used widely to analyze track vibration in railway engineering. The article is devoted to compare the difference between vibration responses of track corresponding to the two models, so different model can be chosen appropriately in the actual engineering. The single layer continuous elastic Timoshenko and Euler beam models are established and vibration responses of track structure are obtained by Fourier Transform technique. The vibration displacements of track structure in time domain at different frequencies based on the two beam models are achieved and compared in the examples. The results show that vibration responses of track structure computed by the two beam models are almost the same at low frequencies, ranging from 0 Hz to 650 Hz, and definite different at higher frequencies. The Timoshenko beam takes into account shear deformation and rotatory inertia, so it can simulate much more reasonably high frequency characters of track vibration.