KR20160020018A - Apparatus for reducing noise and vibration - Google Patents

Abstract

The present invention relates to a noise and vibration reducing device. According to an embodiment of the present invention, the noise and vibration reducing device comprises: a support attached to a vibration generating object; and a collision damper which collides the vibration generating object due to vibrations generated in the vibration generating object, wherein a part thereof is in contact with the vibration generating object since being axis-connected to the support. The collision damper disperses energy of the vibration generated due to collision with the vibration generating object, and reduces the vibration and noise of the vibration generating object.

Description

[0001] APPARATUS FOR REDUCING NOISE AND VIBRATION [0002]

Embodiments of the present invention relate to a noise and vibration reduction apparatus, and more particularly, to a noise and vibration reduction apparatus capable of reducing noise and vibration generated in an object generating vibration such as a ceiling or floor of a multi- .

Interlayer noise is one of the most sensitive social problems among residential facilities, and has recently become a serious issue. Various solutions have been proposed as a solution to this interlayer noise problem.

Efforts to block or reduce already generated noises such as adjusting the thickness of the bottom slab, insertion of vibration damper material, attachment of sound insulation materials, active noise control, etc. are mostly made, And there is no practical effect of reducing the amount.

Generally, a mass damper is used inside a high-rise building to reduce vibration caused by external factors (wind, earthquake, etc.) of the building. This technique improves the lateral vibration control and stability of the building due to external factors, but it does not control noise generated inside.

Various studies have been carried out to control the vibration and noise of the floor. Basically, noise reproduction and measurement techniques using standard weight impact sources have been standardized. Also, the allowable noise level is standardized and the floor slab thickness is limited when building a residential unit.

On the other hand, the damper applied to a train rail or the like has a cross-sectional area of a thinner thickness of the abdomen than the upper portion. Therefore, when the rails are excited by the movement load of the train, the upper part moves severely with respect to the abdomen.

So far, a web damper has been mainly used to block the vibration of the railway track, which is designed to increase the stiffness of the rail by reinforcing the thickness of the abdomen of the rail. This can increase the frequency of all vibrations occurring on the rails and reduce the high frequency components of the vibration.

The method of changing the resonance frequency itself by increasing the thickness of the bottom is not considered to be a fundamental problem solving since the energy itself is not dissipated. In addition, it is intended to improve the sound insulation and soundproofing performance by inserting the vibration damper, but the construction cost is increased and there is a problem in its effectiveness. In addition, the conventional impact damper is not the effect and performance of the actual impact damper but the general web damper, and the effect of the energy dissipated due to the collision can not be seen.

As related prior art, there is a registered patent publication No. 10-0971534 entitled " Vibration control device of a bottom plate structure using a magnetorheological damper and an attenuating plate, registered on July 14, 2010.

One embodiment of the present invention is a noise and vibration reduction device capable of reducing noise and vibration by adopting a structure in which a collision damper collides with a vibration generating object such as a ceiling or a floor slab of a multi- to provide.

The problems to be solved by the present invention are not limited to the above-mentioned problem (s), and another problem (s) not mentioned can be clearly understood by those skilled in the art from the following description.

According to an embodiment of the present invention, there is provided a noise and vibration reduction device comprising: a support attached to a vibration generating object; And a collision damper which is axially connected to the support so as to be in contact with a part of the vibration generating object and which causes a collision with the vibration generating object due to vibration generated in the vibration generating object, The vibration of the vibration generating object is reduced by dissipating the energy of the vibration generated by the collision with the vibration generating object.

The supporting member may be formed in a 'C' shape having a horizontal axis, and the impact damper may be connected to a horizontal axis of the support through an arbor hole formed in a central portion of the disc.

Preferably, the collision damper includes a plurality of bearings inserted into the shaft hole, and the collision damper is rotatable about the support shaft as a rotation shaft through the plurality of bearings.

The apparatus for reducing noise and vibration according to an embodiment of the present invention may further include a dynamic damper connected to the collision damper to increase the number of times of collision between the collision damper and the vibration generating object.

The dynamic damper may be designed to match the frequency of the vibration generated in the vibration generating object.

The dynamic damper may be designed in the form of a beam having a predetermined length in accordance with the frequency of the vibration.

The dynamic damper crosses the horizontal axis of the support and can be disposed in the rotational direction of the disk-shaped impact damper.

The vibration generating object may include at least one of a ceiling of a multi-family house generating an interlayer noise, a road where a vibration problem occurs, and a train rail.

The details of other embodiments are included in the detailed description and the accompanying drawings.

According to an embodiment of the present invention, noise and vibration can be reduced by employing a structure in which a collision damper collides with a vibration generating object such as a ceiling of a multi-family apartment or a floor slab and dissipates energy.

According to the embodiment of the present invention, since it is possible to selectively install the apparatus in a generation where interlayer noise is generated, it is possible to apply the system to a newly constructed household, It is possible.

According to an embodiment of the present invention, since it is possible to selectively install, it is possible to have a solution and differentiation from the layer noise, such as slab thickness change, re-insert insertion, rigidity increase,

According to an embodiment of the present invention, not only the vibration at a specific frequency can be effectively reduced by controlling the mass and rigidity, but also the vibration can be reduced in all frequency ranges.

1 is a perspective view of a noise and vibration reduction apparatus according to an embodiment of the present invention.
2 is a front view of a noise and vibration reduction apparatus according to an embodiment of the present invention.
3 is a plan view of a noise and vibration reduction apparatus according to an embodiment of the present invention.
4 is a side view of a noise and vibration reduction apparatus according to an embodiment of the present invention.
FIG. 5 is a graph showing a vibration reduction effect by collision through a simple experiment.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and / or features of the present invention, and how to accomplish them, will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. It should be understood, however, that the invention is not limited to the disclosed embodiments, but is capable of many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

In an embodiment of the present invention, a collision damper is used. Unlike the web damper, the collision damper not only reduces the high frequency component of the vibration but also exhibits excellent seismic resistance even at low frequencies due to the collision effect.

Conventional web dampers only increase the effect of stiffness, but the impact damper used in an embodiment of the present invention uses a method of dissipating vibration energy through collision of an object, rather than simply increasing rigidity.

According to an embodiment of the present invention, since the length is not as long as the web damper, it is economically efficient and the design according to the change of the temperature is easy. In addition, according to one embodiment of the present invention, vibration at a specific frequency can be effectively reduced by controlling mass and rigidity.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view of a noise and vibration reduction apparatus according to an embodiment of the present invention, FIG. 2 is a front view of a noise and vibration reduction apparatus according to an embodiment of the present invention, and FIG. FIG. 4 is a side view of a noise and vibration reduction apparatus according to an embodiment of the present invention. FIG.

1 to 4, the apparatus 100 for reducing noise and vibration according to an embodiment of the present invention may include a support 110, a collision damper 120, and a dynamic damper 130 .

The support base 110 is attached to the vibration generating object 101. Here, the vibration generating object 101 may include a ceiling (or a slab on the bottom) of a multi-family house generating inter-layer noise, roads and rail rails on which a vibration problem occurs, and the like.

The support 110 may be formed in a 'C' shape having a horizontal axis. That is, the support base 110 may be formed in a shape in which a horizontal axis is placed on two vertical supports, and the two vertical supports may be attached to the vibration generating body 101.

In one embodiment of the present invention, the support 110 may be fixedly attached to the vibration generating body 101, but not limited thereto, and may be removably attached to and detached from the vibration generating body 101. The reason why the support member 110 can be attached and detached is that the noise and vibration reduction apparatus 100 can be manufactured in a small size.

The collision damper 120 is axially connected to the supporter 110 and is disposed in a state where a part of the collision damper 120 is in contact with the vibration generating object 101. At this time, the collision damper 120 may be connected to the horizontal axis of the support base 110 through an arbor hole formed in the central portion of the disc.

The impact damper 120 may include a plurality of bearings (not shown) inserted into the shaft hole. The collision damper 120 may be rotatably mounted on the support 110 through the plurality of bearings.

With this structure, the collision damper 120 is disposed in partial contact with the vibration generating object 101 and collides with the vibration generating object 101, which is generated in the vibration generating object 101 Which is caused by vibration.

In other words, the collision damper 120 rotates in a state of being partially in contact with the vibration generating object 101, thereby causing a collision with the vibration generating object 101.

Accordingly, the collision damper 120 can dissipate the vibration energy generated by the vibration generating object 101, thereby reducing the vibration and noise of the vibration generating object 101.

The dynamic damper 130 may be connected to the collision damper 120 to increase the number of collisions between the collision damper 120 and the vibration generating object 101.

At this time, it is preferable that the dynamic damper 130 intersects with the horizontal axis of the supporter 110 and is disposed in the rotational direction of the impact damper 120 having a disk shape. That is, the dynamic damper 130 is preferably disposed in a direction parallel to the impact damper 120.

The dynamic damper 130 may be designed to match the frequency of the vibration generated by the vibration generating object 101. Specifically, the dynamic damper 130 may be designed as a beam having a predetermined length in accordance with the frequency of the vibration.

Here, the length of the dynamic damper 130 may be proportional to the vibration frequency. That is, the dynamic damper 130 is designed to have a shorter length as the vibration frequency is lower, while a longer length may be designed as the vibration frequency increases.

Example

In this embodiment, the disc or the disc-like weight represents the impact damper 120, and the ceiling represents the vibration generating object 101. [

As shown in FIGS. 1 to 4, the disc-shaped weight is slightly closed on the ceiling in the 'C' -shaped support 110. The disc and support (110) are connected by bearings and are designed to move further in the form of a disc. As a result, disc-shaped weights and ceilings can cause collision due to vibration.

This collision results in energy dissipation, vibration energy decreases, and consequently vibration and noise can be suppressed. The dynamic damper (beam shape) 130 connected to the disc-shaped weights is designed to match the frequency of vibration to increase the number of times it is hit with a disc-shaped additional ceiling.

As described above, in the embodiment of the present invention, the energy dissipation is caused by the collision between the disc-shaped weight and the ceiling, so that vibration and noise generated in the ceiling can be reduced. Particularly, when the dynamic damper 130 is connected to the impact damper 120, vibration and noise can be further reduced.

The vibration and noise reduction effect when the dynamic damper 130 is connected to the impact damper 120 will be described with reference to FIG.

FIG. 5 is a graph showing a vibration reduction effect by collision through a simple experiment. For reference, the portion corresponding to the stiffness in this experiment is a beam-like structure, that is, the dynamic damper 130.

As shown in FIG. 5, it can be confirmed that the vibration at a specific frequency is large when the clearance of the collision damper 120 without stiffness is not given (the red line in FIG. 5). When the stiffness of the impact damper 120 is not given (blue line in FIG. 5), it can be seen that the vibration at the first pure tone component frequency is reduced while being divided. On the other hand, when the stiffness of the striking impact damper 120 is given (green line in FIG. 5), it can be seen that the vibration is damped in all the frequency regions through the impact of the impact damper 120 and the stiffness.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Modification is possible. Accordingly, the spirit of the present invention should be understood only in accordance with the following claims, and all equivalents or equivalent variations thereof are included in the scope of the present invention.

101: Vibrating object
110: Support
120: collision damper
130: dynamic damper

Claims (8)

A support attached to the vibration generating object; And
A collision damper that is axially connected to the support and is disposed in contact with a part of the vibration generating object and is caused to collide with the vibration generating object due to vibration generated in the vibration generating object;
Lt; / RTI >
The collision damper
Wherein vibration and noise of the vibration generating object are reduced by dissipating energy of the generated vibration by collision with the vibration generating object.
The method according to claim 1,
The support
Shaped " shape having a horizontal axis,
The collision damper
And connected to a horizontal axis of the support through an arbor hole formed in the center of the disc.
3. The method of claim 2,
The collision damper
And a plurality of bearings inserted into the shaft hole, and is rotatable about the support shaft as a rotation shaft through the plurality of bearings.
The method according to claim 1,
A shock absorber connected to the impact damper for increasing the number of times of collision between the impact damper and the vibration generating object,
Further comprising: a noise and vibration reduction device.
5. The method of claim 4,
The dynamic damper
Wherein the noise reduction device is designed to match the frequency of vibration generated in the vibration generating object.
6. The method of claim 5,
The dynamic damper
Wherein the vibration and vibration reduction device is designed as a beam having a predetermined length in accordance with the frequency of the vibration.
5. The method of claim 4,
The dynamic damper
Wherein the vibration damper is disposed in a direction of rotation of the impact damper, which intersects the horizontal axis of the support and is shaped like a disk.
The method according to claim 1,
The vibration-
A ceiling of a multi-family house generating interlayer noise, a road where a vibration problem occurs, and a train rail.

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