Ballastless track plate structure for realizing broadband vibration attenuation based on photonic crystal principle

Abstract

The invention discloses a ballastless track plate structure for realizing broadband vibration attenuation based on a photonic crystal principle. The structure comprises a ballastless track plate vibration attenuation structure consisting of three parts of a periodic steel column vibration attenuation device, a periodic rubber column vibration attenuation device and a track plate which are repeatedly arranged along the direction of a line. The periodic steel column vibration attenuation device and the periodic rubber column vibration attenuation device are both located in the track plate belowa track position, and the periodic rubber column vibration attenuation device is arranged below the periodic steel column vibration attenuation device and distributed side by side in parallel. The periodically-arranged steel columns are good in high-frequency vibration attenuation, the periodically-arranged rubber columns are good in low-frequency vibration attenuation, rubber can attenuate high-frequency vibration to a certain extent due to a damping effect of the rubber, and overall vibration of the track structure is greatly reduced through combination of the two.

Description

technical field [0001] The invention relates to the field of vibration reduction based on the principle of phonon crystals, in particular to a ballastless track plate structure for realizing broadband vibration reduction based on the principle of phonon crystals. Background technique [0002] The current train vibration reduction measures commonly used are to place vibration reduction components (such as elastic cushions, spring supports, etc.) under the rails, sleepers or ballast beds to provide the necessary elasticity for the track system and absorb vibration energy to increase the vibration reduction. vibration performance, but these vibration-absorbing components have the disadvantages of limited life, high cost and difficult maintenance. In addition, the working principle of these damping components determines that it only has a good damping effect on vibration waves whose frequency is close to or higher than its natural frequency, and has a better damping effect on ...

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Problems solved by technology

In the previous vibration damping design, the influence of the confinement effect of the matrix on the inclusions on the band gap was not considered. In this case, if the confinement ability of the matrix is ​​weak, the characteristic of the band gap generated based on the Bragg scattering principle is that the frequency is relatively low. High, and requires a large size of the structure; the structure based on the principle of local resonance requires soft materials such as rubber to be coated on the outside of the heavy core, resulting in a lower band gap frequency, but the band gap width is very narrow

[0004] At present, there is no way to combine periodic structure vibration reduction and orbital structure based on the principle of phononic crystals

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