Research On Wheel-Rail Rolling Noise On Ballasted Track Of Passenger Dedicated Line

One of the critical problem the high-speed railway faces is the wheel-rail rolling noise. The worldwide present situation's study of wheel-rail rolling noise is summarized in this thesis. Rolling noise is generated by vibrations of both the rail and the wheel. To predict the rail's noise radiation, the receptance analysis model of the track system is built in this thesis. In this model, the rail is described by three-dimension solid element and the sleeper is described by elastic beam element. Based on the model mentioned above, the vertical receptance of the rail is calculated. To predict the wheel's noise radiation, a FEM analysis model of the wheel is developed. Based on the modal superposition method, the radial receptance of the wheel is calculated.The power spectrum density of roughness and the contact area filter character is analyzed. Based on the power spectrum density of roughness which is presented by Sato analyzing the high frequency vibration, different roughness in time domain is simulated. Using Remington's wheel-rail interaction model, the vibration characteristic of the rail and the wheel is calculated which is caused by roughness.Based on Remington's wheel-rail noise prediction model and the vibration property of wheel-rail system, considering the rail as a moving linear radiator of sound and the wheel as a moving point one, the wayside rolling noise of ballasted track is predicted. At the same time, the wayside noise is analyzed and compared at different speed, number of axles, the location to predict, receptance and roughness of rail and wheel. Based on the analysis of this thesis, the measures of vibration damping and noise reducing are presented for wheel and track.