Abstract
Rail traffic noise is mainly caused by the vibration of wheel and rail. Pasting the constrained damped dynamic vibration absorber on the rail is a common vibration and noise reduction measure. To analyze the effect of rail with constrained damped dynamic vibration absorber, we use the finite element software to establish single and multi-layered rail model with constrained damped dynamic vibration absorber, with the consideration of irregularity effect. We use the moving load to load and transient dynamic response to analyze. The results show that: the rail installed with constrained damped dynamic vibration absorber has a good vibration-reducing effect. Compared to the rail and track where the constrained damped dynamic vibration absorber is not installed, the maximum vertical displacement and acceleration of the rail and track where a single-layered constrained damped dynamic vibration absorber is installed was reduced by 65% to 68%; the maximum vertical displacement and acceleration of the rail and track where a three-layered constrained damped dynamic vibration absorber is installed was reduced by 70% to 72%.
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