Periodic structure railway track plate based on elastic wave forbidden band theory

A technology of periodical structure and railway track, applied in the direction of track, road, ballast layer, etc., can solve the problem of limited effect of isolating subway vibration

Inactive Publication Date: 2021-06-04
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the device still uses a vibration isolator for vibration isolatio

Method used

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  • Periodic structure railway track plate based on elastic wave forbidden band theory
  • Periodic structure railway track plate based on elastic wave forbidden band theory
  • Periodic structure railway track plate based on elastic wave forbidden band theory

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Embodiment Construction

[0023] Below in conjunction with accompanying drawing and the application in subway the present invention will be further described.

[0024] figure 1 It is a schematic diagram of a periodic structure subway track slab based on elastic wave forbidden band theory provided by the present invention, including a reinforced concrete matrix of the track slab (a spherical cavity is reserved in the track slab), negative mass soft cladding materials and steel balls;

[0025] The reserved spherical cavities in the track plate are arranged in a periodic structure.

[0026] The periodic structural arrangement of the cavities means that the periodic arrangement distance L of the cavities along the depth and width directions of the track slab and the periodic arrangement distance L1 along the length direction of the track slab are periodically distributed on the reinforced concrete matrix of the track slab middle.

[0027] The vibration isolation principle of the periodic structure railwa...

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Abstract

The invention provides a periodic structure railway track slab based on an elastic wave forbidden band theory, spherical cavities are periodically arranged in the periodic structure railway track slab, and the cavities are filled with steel balls with negative mass soft coating materials on the outer surfaces. The periodic structure track plate can isolate low-frequency vibration propagation, so that vibration generated by train operation is blocked. According to the periodic structure railway track slab, the forbidden band theory of the periodic structure is utilized, the periodic structure track plate suitable for isolating low-frequency vibration is provided, and the periodic structure and the material applied to the railway track plate are designed at the same time. In practical application, the periodic structure track plate dissipates vibration energy transmitted by moving load of an upper railway into the negative mass soft coating material of the periodic structure, upper vibration is prevented from being transmitted into a foundation, and then vibration isolation of the railway track is achieved.

Description

[0001] The invention relates to the field of railway track vibration isolation, in particular to a period structure railway track plate based on elastic wave band gap theory. Background technique [0002] The operation of the railway greatly affects the safety of surrounding buildings and structures while facilitating people's travel. The vibration generated by the railway has great harm to the foundation and surrounding residents. Therefore, it is extremely important to isolate the vibration generated by the railway operation. [0003] At present, it is more common to perform vibration isolation at the vibration source. Germany invented the steel spring floating plate track, which relies on the inertia of the floating plate and steel spring for vibration isolation. There is a lot of room for improvement in this approach. Patent CN110528340A discloses a phononic crystal vibration isolator, which is used to replace steel springs, and the band gap theory of phononic crystals is ...

Claims

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Application Information

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IPC IPC(8): E01B1/00E01B19/00
CPCE01B1/002E01B19/00E01B19/003E01B2204/09
Inventor 曹志刚马力蔡袁强
Owner ZHEJIANG UNIV
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