Study on the Noise Reduction Performance of a New Type Elastic Particles Applied to the Tram

As the development of the economic society, the new orbit form such as modern tram track arises at the historic moment. Considering the urban internal environment, a higher request is put forward on vibration and noise reduction. This passage is devoted to analyze the noise reduction performance of the granule material, which gained by recycling the waste rubber. We can draw the following conclusions by comparing the noise value and frequency characteristic analysis in different conditions: the new particle material, the ratio of which is 3mm and 5mm, can suppress the noise in different frequency. Especially, the effect is obvious in high frequency area about 1000Hz to 1500Hz.When the track is under a vertical excitation, the combined structure can suppress the rail acoustic radiation noise obviously within 0 to 4000Hz frequency and 1/3 octave center frequency. The horizontal reduction of the noise will be reduced as the increasing of the distance between the vibration source and the test point.