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Novel phonon crystal deceleration pavement structure

A phononic crystal and pavement structure technology, applied to roads, roads, special pavements, etc., can solve the problems of insufficient drag coefficient, large tire wear, high traffic accident rate, etc., to ensure stability, small tire wear, and improve comfort sexual effect

Pending Publication Date: 2021-12-31
TONGJI UNIV
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

The traffic accident rate of the above-mentioned road sections is higher than the average level, and heavy and extraordinarily serious traffic accidents occur frequently, causing serious harm to the safety of public life and property
[0003] Existing escape lanes use loose sand and gravel materials, which mainly have the following problems: they are easily damaged, and the vehicle cannot drive out after being trapped; the tires are greatly worn; the drag coefficient is not large enough, which has a great impact on the length of the escape lane. big request

Method used

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  • Novel phonon crystal deceleration pavement structure
  • Novel phonon crystal deceleration pavement structure
  • Novel phonon crystal deceleration pavement structure

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Embodiment 1

[0033] Phononic crystals are artificial structural composite materials with periodic modulation of bulk elastic modulus and mass density. It is composed of background materials with large impedance mismatch and periodic units. Due to periodic Bragg scattering and local monomer Mie scattering, after the elastic wave is scattered by a periodic medium, the elastic wave of certain frequencies will decay exponentially due to destructive interference and cannot propagate in the system, so a band gap is formed on the frequency spectrum, usually called the phonon frequency band Gap. According to the basic properties of the band gap of the phononic crystal - when the frequency of the sound wave (elastic wave) is within the forbidden band range, the sound wave (elastic wave) and vibration are not allowed to pass through. According to these properties, a kind of Vibration isolation and energy dissipation materials based on this new theory.

[0034] Such as Figure 1-3 As shown, this em...

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Abstract

The invention relates to a novel phonon crystal deceleration pavement structure. The novel phonon crystal deceleration pavement structure is formed by sequentially overlapping five base plates and four phonon crystal thin plates, wherein the base plates are solid rubber plates, and vehicles can stably run on the base plates, the phonon crystal thin plates are rubber plates, and cylindrical small holes are regularly distributed to serve as scatterers so as to form a periodic distribution energy band structure of elastic constants and density. The base plates and the phonon crystal thin plates are sequentially overlaid to form the composite elastic wave phonon crystal structure with periodically modulated body elastic modulus and mass density. Compared with the prior art, a three-dimensional photon crystal periodic composite structure is adopted, and energy dissipation and speed reduction effects on vehicles can be achieved based on periodic Bragg scattering and local monomer Mie scattering.

Description

technical field [0001] The invention relates to the field of road engineering, in particular to a novel phonon crystal deceleration pavement structure. Background technique [0002] Restricted by terrain, geology, hydrology and other conditions, mountainous expressways generally have dangerous sections such as long longitudinal slopes, sharp bends, and continuous tunnels. In order to ensure driving safety, the driver will often brake to reduce the driving speed, which also brings about the temperature rise of the brake hub and the problem that the brake system may fail. The traffic accident rate of the above-mentioned road sections is higher than the average level, and heavy and extraordinarily serious traffic accidents occur frequently, causing serious harm to the safety of public life and property. [0003] Existing escape lanes use loose sand and gravel materials, which mainly have the following problems: they are easily damaged, and the vehicle cannot drive out after be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C9/00
CPCE01C9/007
Inventor 朱兴一杨铭
Owner TONGJI UNIV
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