Research On Vibration And Sound Radiation Characteristics Of The Surface Damped Wheel

In order to reduce railway rolling noise of the high-speed and metro wheels, a wheel-rail rolling noise model is set up, based on the hybrid FEM-BEM method and wheel-rail noise mechanism. This model is used to calculate the vibration and sound characteristics of the high-speed train wheel and develop wheel noise control devices.The main work is showed as following:1. Research on the operational high-speed train wheel of country, based on the method of FEM and BEM, build the 3D finite element mode and the acoustical mode of the wheel, calculate every modal of the wheel.2. Acquire the natarul frequency、damping ratio and FRF through the stimulation of the force hammer in the free hanging condition. And get the effect of vibration and noise reduction of the constrained layer damped wheel, compared with the normal wheel through falling ball impact test.3. Acquire the natarul frequency、damping ratio and FRF through the stimulation of the force hammer in the free hanging condition and in the condition of loaded with 4 tons. And get the effect of vibration and noise reduction of the srpayed damping wheel, compared with the normal wheel through falling ball impact test.4. The results are obtained in the free condition that the constrained layer damped wheel due to radial and axial excitations are, respectively,10.9dB and 10.0dB lower than those of the normal one.5. The results are obtained in the free condition that the sprayed damping wheel due to radial and axial excitations are, respectively,6.4dB and 3.8dB lower than those of the normal one. In the condition of loaded with 4 tons, the sprayed damping wheel due to radial and axial excitations are, respectively,5.4dB and 2.1dB lower than those of the normal one.