CN212688579U - Vibration and noise reduction device for track floating plate - Google Patents
Vibration and noise reduction device for track floating plate Download PDFInfo
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- CN212688579U CN212688579U CN201921431690.0U CN201921431690U CN212688579U CN 212688579 U CN212688579 U CN 212688579U CN 201921431690 U CN201921431690 U CN 201921431690U CN 212688579 U CN212688579 U CN 212688579U
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Abstract
The utility model discloses a ware of making an uproar falls in track floating plate damping installs on two rail inboard floating plates, including viscoelastic material layer and the granule damping dynamic vibration absorber that from top to bottom sets gradually. The particle damping dynamic vibration absorber comprises a rigid mass layer and an elastic material layer which are sequentially arranged from top to bottom, and the elastic material layer is connected with the surface of the floating plate. The vibration and noise reduction device adopts a brand new design structure, and can obviously control the structural vibration of the floating plate, so that the structural noise of the floating plate can be controlled. The vibration and noise reduction device adopts a damping material with wide temperature range, high performance and high strength as a viscoelastic material layer to absorb sound and reduce noise, the strength of the vibration and noise reduction device is higher than that of the existing porous inorganic material track sound absorption plate structure, meanwhile, the influence of field dust impurities of an operation line on the sound absorption and noise reduction effect is small, and the long-term sound absorption and noise reduction effect performance is better.
Description
Technical Field
The utility model belongs to the technical field of the track damping equipment, concretely relates to ware of making an uproar falls in track floating plate damping.
Background
The existing floating slab track has lower supporting rigidity, smaller damping of a reinforced concrete floating slab structure and large vibration response of the floating slab under the action of train disturbance, thereby causing large radiation noise of the floating slab. The increased noise is transmitted to the inside of the vehicle body, affecting the riding comfort of the driver and passengers.
Chinese patent (publication No. CN 103452015A) discloses a track sound-absorbing plate structure, which comprises a central block plate body positioned between tracks on two sides and edge block plate bodies positioned on two sides of the tracks, wherein the central block plate body and the edge block plate bodies are cellular structure plate bodies made of porous inorganic materials; the left end and the right end of the central block plate body are provided with sleeper concave parts matched with sleepers, the middle part of the lower surface is provided with a longitudinal drainage ditch groove, the two sides of the middle part are respectively provided with a bearing platform concave part, and the lower surface is provided with a transverse connecting rod groove; a plurality of wedges with cut-off tips are transversely arranged on the upper surfaces of the central block plate body and the side block plate body, and the wedges are arranged at intervals; the abatvoix structure can be fast convenient lay on track railway roadbed surface, simple to operate utilizes porous inorganic material to fall the noise of the principle that sound energy absorbs, can effectively reduce the influence of wheel rail noise to the passenger, begins to absorb wheel rail noise from noise source nearest simultaneously promptly, avoids the diffusion of noise, effectively reduces the noise.
However, this patent has the following drawbacks;
1. the track sound absorbing plate structure is based on sound absorption and noise reduction only, and has little effect on vibration and structural noise control of a floating plate. And therefore has no effect on controlling the low frequency booming caused by the floating plate track.
2. This track sound-absorbing plate structure adopts porous inorganic material, and the porosity is often great in order to improve the sound absorption effect, therefore structural strength is often lower, and is comparatively unfavorable to the field operation.
3. This track sound-absorbing plate structure adopts porous inorganic material, and the unobstructed very key to its sound absorption effect in hole, the on-the-spot dust impurity granule of service line is more and can block up the abatvoix hole, if the abatvoix washs untimely, can influence greatly to abatvoix noise reduction effect.
SUMMERY OF THE UTILITY MODEL
The utility model provides an above-mentioned prior art not enough, provide a ware of making an uproar falls in track floating plate damping, can show the structural vibration of control floating plate, therefore its structural noise that can control floating plate.
The utility model adopts the technical proposal that: the utility model provides a track floating plate vibration attenuation noise reducer, installs on two rail inboard floating plate, includes viscoelastic material layer and the granule damping dynamic vibration absorber that sets gradually from top to bottom.
Preferably, the particle damping dynamic vibration absorber comprises a rigid mass layer and an elastic material layer which are sequentially arranged from top to bottom, and the elastic material layer is connected with the surface of the floating plate.
Preferably, the rigid mass layer comprises a steel cavity and a plurality of shot particles, and the shot particles are arranged in the steel cavity in a layered structure.
Preferably, the inner wall of the steel cavity is provided with a damping material layer.
Preferably, the outer surface of the shot particles is provided with a coating layer.
Preferably, the respective shot particles have different radii.
Preferably, the viscoelastic material layer is a sound absorption layer and is made of damping material.
Compared with the prior art, the utility model discloses beneficial effect who has:
1. the vibration and noise reduction device adopts a brand new design structure, and can obviously control the structural vibration of the floating plate, so that the structural noise of the floating plate can be controlled.
2. The vibration and noise reduction device adopts a damping material with wide temperature range, high performance and high strength as a viscoelastic material layer to absorb sound and reduce noise, the strength of the vibration and noise reduction device is higher than that of the existing porous inorganic material track sound absorption plate structure, meanwhile, the influence of field dust impurities of an operation line on the sound absorption and noise reduction effect is small, and the long-term sound absorption and noise reduction effect performance is better.
3. Lead ball particles with different radiuses and wrapping layers are adopted in the steel cavity to form a particle damping dynamic vibration absorber, and the strong nonlinear behavior of the lead ball particles enables the inherent damping characteristic of the lead ball particles to change along with the excitation level; the response level at the resonance peak of the floating plate can be effectively inhibited, and the vibration absorption frequency band can be widened.
4. The upper surface of the vibration and noise reduction device is adhered with a viscoelastic material layer, and the viscoelastic material layer is made of damping materials with wide temperature range, high performance and high strength, so that the noise near the structure can be well absorbed, and the purpose of further reducing the track noise is achieved.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic diagram of the rigid mass layer structure of the present invention;
fig. 3 is a schematic cross-sectional view of the present invention;
fig. 4 is an installation schematic diagram of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
A vibration and noise reduction device for a track floating plate is shown in figure 2 and is installed on a floating plate 4 on the inner side of two steel rails 3, and the vibration and noise reduction device is shown in figure 1 and comprises a viscoelastic material layer 1 and a particle damping dynamic vibration absorber 2 which are sequentially arranged from top to bottom.
Example 1
The viscoelastic material layer 1 is a sound absorption layer, preferably made of damping material with wide temperature range, high performance and high strength, and can absorb sound through the damping material, so that noise near the structure can be better absorbed, the purpose of further reducing the track noise is achieved, the influence of field dust impurities of an operation line on the sound absorption and noise reduction effect is small, and the strength of the viscoelastic material layer is higher than that of the porous inorganic material.
With reference to fig. 1 and fig. 2, the particle damping dynamic vibration absorber 2 includes a rigid mass layer 21 and an elastic material layer 22 sequentially disposed from top to bottom, and the elastic material layer 22 is connected to the surface of the floating plate 4. The rigid mass layer 21 includes a steel cavity 211 and a plurality of shot particles 212, and the shot particles 212 are arranged in the steel cavity 211 in a layered structure.
Example 2
When the floating plate 4 is subjected to vertical, transverse and longitudinal loads, broadband vibration occurs, energy dissipation caused by collision and friction energy consumption among shot particles 212 and energy exchange between the shot particles 212 and the viscoelastic material layer 1 is achieved, vibration of the floating plate 4 is reduced, and finally the purpose of reducing sound radiation of the floating plate 4 is achieved.
Example 3
Referring to fig. 3, in order to further improve the sound absorption and noise reduction effects of the floating plate 4, a damping material layer 213 is disposed on an inner wall of the steel cavity 211.
Example 4
Referring to fig. 3, the outer surface of the shot particles 212 is provided with a coating layer, and the radius of each shot particle 212 is different. Particles 212 with different radiuses and wrapping layers are adopted in the steel cavity 211 to form the particle damping dynamic vibration absorber 2, and the strong nonlinear behavior of the shot particles enables the inherent damping characteristic of the shot particles to change along with the excitation level; this can effectively suppress the response level at the formants of the floating plate 4, and can also widen the vibration absorption band.
The working principle of the vibration and noise reduction device is that the vibration and noise reduction device is supported on the floating plate 4, and vibration and sound radiation of the floating plate 4 are obviously inhibited. By combining the damping and sound absorption principle, the viscoelastic material 1 is adhered to the surface of the rigid mass layer 21 of the particle damping vibration absorber 2, so that the nearby noise radiation is well absorbed. The noise level of the wheel rail is reduced jointly, and the riding comfort of a driver and passengers is further improved.
The above-mentioned embodiments are merely preferred embodiments of the present invention, and not intended to limit the scope of the present invention, so that all equivalent changes made by the contents of the claims of the present invention should be included in the scope of the claims of the present invention.
Claims (7)
1. The utility model provides a track floating plate vibration attenuation noise reducer, installs on two rail (3) inboard floating plate (4), its characterized in that, includes viscoelastic material layer (1) and granule damping dynamic vibration absorber (2) that set gradually from top to bottom.
2. A track floating plate vibration and noise reducer according to claim 1, wherein said particle-damped dynamic vibration absorber (2) comprises a rigid mass layer (21) and an elastic material layer (22) arranged in sequence from top to bottom, said elastic material layer (22) being attached to the surface of the floating plate (4).
3. A track floating plate vibration and noise damper according to claim 2, characterized in that said rigid mass layer (21) comprises a steel cavity (211) and several shot particles (212), said shot particles (212) being arranged in a layered structure in the steel cavity (211).
4. A track floating plate vibration and noise reducer according to claim 3, characterized in that the inner wall of the steel cavity (211) is provided with a layer (213) of damping material.
5. An orbital floating plate vibration and noise reducer as set forth in claim 4 wherein said shot particles (212) have an outer surface with a coating.
6. An orbital floating plate vibration and noise reducer as set forth in claim 5 wherein each of said shot particles (212) is of different radius.
7. A vibration and noise reducer for track floating slabs according to claim 1, characterized in that said layer of viscoelastic material (1) is an acoustic layer and made of damping material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921431690.0U CN212688579U (en) | 2019-08-30 | 2019-08-30 | Vibration and noise reduction device for track floating plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921431690.0U CN212688579U (en) | 2019-08-30 | 2019-08-30 | Vibration and noise reduction device for track floating plate |
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| Publication Number | Publication Date |
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| CN212688579U true CN212688579U (en) | 2021-03-12 |
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| CN201921431690.0U Active CN212688579U (en) | 2019-08-30 | 2019-08-30 | Vibration and noise reduction device for track floating plate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110593023A (en) * | 2019-08-30 | 2019-12-20 | 罗桂花 | Vibration and noise reduction device for track floating plate |
| CN114250879A (en) * | 2021-12-31 | 2022-03-29 | 同济大学 | Recycled concrete damping energy dissipation beam and preparation method thereof |
-
2019
- 2019-08-30 CN CN201921431690.0U patent/CN212688579U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110593023A (en) * | 2019-08-30 | 2019-12-20 | 罗桂花 | Vibration and noise reduction device for track floating plate |
| CN114250879A (en) * | 2021-12-31 | 2022-03-29 | 同济大学 | Recycled concrete damping energy dissipation beam and preparation method thereof |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230512 Address after: 412000 rooms 102, 202, 302, building a11, high tech xinmajingu, Majiahe street, Tianyuan District, Zhuzhou City, Hunan Province Patentee after: Hunan jiuyu Tongchuang polymer new material Co.,Ltd. Address before: 2205, building 1, Internet Industrial Park, No.1, Binhe South Road, Weibin District, Baoji City, Shaanxi Province Patentee before: Shaanxi Jiuyu Tongchuang Track System Technology Co.,Ltd. |
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| TR01 | Transfer of patent right |