The Influence of Bearing Stiffness on Modes of Vibration of Floating Slab Track

Abstract

This paper combines with theoretical and experimental modal analysis With the verification of simulation and field test the model is used to simulate the effects of stiffness-changing from bearing aging or fatigue This model could help realize the effects caused by the stiffness- changing of bearings under the floating slab to the whole system In simulation ABAQUS/CAE was used to conduct the FEM analysis The data were referred from the design of TIAA MRT Extension Line With the FEM analysis the natural frequencies and mode shapes in modes of vibration can be determined Mode shape is the one which is difficult to realize in experimental analysis In field test Hammer Test is used to conduct experimental modal analysis The experimental location is at A22 station of TIAA MRT Extension Line With the system transferring concept SPR (Source Path Response) combining with Fast Fourier Transform then Frequency Response Function can be determined and the system can be realized Then the natural frequency will be found In the process of verification knowing that every peak in spectrums in the field test doesn’t represent only one mode of vibration The main reason is that the natural frequencies of some modes of vibration are too close to know there are how many modes of vibration in a peak With the modes of vibration knowing from simulation and combining different situations of bearing stiffness-changing Knowing that the effects caused with bearing stiffness-changing to natural frequencies and every mode of vibration of system

Date of Award	2020
Original language	English
Supervisor	Chen-Ming Kuo (Supervisor)