A high-speed train floor

A technology for high-speed trains and floors, which is applied to railway car bodies, railway car body components, instruments, etc., can solve problems such as the inability to meet the vibration and noise control requirements of high-speed trains, and achieve good vibration and noise reduction performance, long service life, and guaranteed The effect of comfort

A technology for high-speed trains and floors, which is applied to railway car bodies, railway car body components, instruments, etc., can solve problems such as the inability to meet the vibration and noise control requirements of high-speed trains, and achieve good vibration and noise reduction performance, long service life, and guaranteed The effect of comfort

CN108597488BActive Publication Date: 2021-12-21EAST CHINA JIAOTONG UNIVERSITY
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  • A high-speed train floor
  • A high-speed train floor
  • A high-speed train floor

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Experimental program
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Effect test

Embodiment 1

[0028] Such as figure 1 , 2 , shows the train floor of Embodiment 1 of the present invention, the train floor includes a car interior floor 1, thermal insulation material 2, porous sound-absorbing material 3, triangular aluminum frame layer, filling material 5, perforated metal cylinder 6 and three-dimensional standard Phononic crystal 7;

[0029] Among them, the interior floor 1, the thermal insulation material 2, the porous sound-absorbing material 3, and the triangular aluminum frame layer are arranged sequentially from top to bottom, wherein the triangular aluminum frame layer includes a plurality of triangular frames 4, and the cross section of each triangular aluminum frame 4 is In the shape of isosceles triangle, a phononic crystal structure composed of filling material 5, perforated metal cylinder 6 and three-dimensional quasi-phononic crystal 7 is placed in each of them, and arranged according to a certain period;

[0030] Preferably, the three-dimensional quasi-pho...

Embodiment 2

[0043] Embodiment 2: as Figures 1 to 3 As shown, in this embodiment, the arrangement of the first phononic crystal unit 7-1 and the second phononic crystal unit 7-2 is the same as in Embodiment 1; the difference between the two is that the first phononic crystal unit 7-1 and the structure of the second phononic crystal unit 7-2.

[0044] In this embodiment, the first phononic crystal unit 7-1 includes a piezoelectric ceramic core material and a pure copper metal film disposed on the surface of the piezoelectric ceramic core material; when the vibration wave propagates to the first phononic crystal unit 7-1 At this time, the piezoelectric ceramic core material will vibrate under the action of the vibration wave, and convert part of the vibration energy into electrical energy. The pure copper metal film can immediately convert the charge on the surface of the piezoelectric ceramic into heat energy through the resistance effect, thereby reducing Noise reduction effect. In orde...

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Abstract

The invention relates to a high-speed train floor, which is characterized in that: the floor includes an interior floor, thermal insulation materials, porous sound-absorbing materials, triangular aluminum frames, perforated metal cylinders, three-dimensional quasi-phononic crystals and filling materials; A three-dimensional quasi-phononic crystal is installed in the perforated metal cylinder; the cavity in the triangular aluminum frame and the perforated metal cylinder is filled with filling materials; the three-dimensional quasi-phononic crystal is formed by splicing at least two phononic crystal units .

Description

technical field [0001] The invention relates to a high-speed train floor, in particular to a vibration-reducing and noise-reducing high-speed train floor based on a three-dimensional phononic crystal. Background technique [0002] As my country vigorously promotes the research and development of high-speed trains, the speed of high-speed trains is gradually increasing. At the same time, the vibration and noise generated by the train running are getting bigger and bigger, which makes the vibration and noise transmitted to the compartment exceed the standard, which seriously affects the physical and mental health of passengers and travel comfort, and also greatly restricts my country's Further rapid development of high-speed railway. As one of the important components to absorb and isolate the external vibration and noise of the train compartment, the train floor has been paid more and more attention by people, so the requirements for the vibration and noise reduction performa...

Claims

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Application Information

Patent Timeline
21 Dec 2021
Publication
CN108597488B
IPC
G10K11/168; G10K11/175; B61D17/10
CPC
G10K11/168; G10K11/175; B61D17/10
Inventors
冯青松; 孙魁