JP2011144892A - Vibration control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration control device, capable of converting vibration energy of a mass body absorbed by a damping mechanism into electric energy for effective use as electric resources. <P>SOLUTION: The vibration control device 1 includes the mass body 2 disposed separately from a vibration control object, a support mechanism 3 which supports the mass body 2 so as to be relatively displaceable to the vibration control object X, and the damping mechanism 4 which attenuates the relative displacement of the mass body 2 and the vibration control object X. The damping mechanism 4 includes a fixed portion 40 fixed to the mass body 2, a second fixed portion 41 fixed to the vibration control object X, and a damping body 42 interposed between the first fixed portion 40 and the second fixed portion 41. The damping body 42 includes a flexible dielectric substrate which deforms with expansion/contraction according to the relative displacement of the mass body 2 and the vibration control object X, and a pair of electrodes laminated respectively on both surfaces of the dielectric substrate, and the damping body has power generating property of generating electric energy from the pair of electrodes by the expansion/contraction deformation of the dielectric substrate. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a mass damper type vibration damping device.

  As this type of vibration damping device, conventionally, for example, as described in Patent Document 1 below, a mass body arranged separately from a vibration damping object, and the mass body with respect to the vibration damping object There is provided a TMD (tuned mass damper) including a support mechanism that is relatively displaceably supported and an attenuation mechanism that attenuates the relative displacement between the mass body and the object to be controlled. This vibration damping device (TMD) is a device that is mainly installed in a structure such as a high-rise building or a tower type, and is effective in suppressing vibration caused by wind loads. Examples of the mass body include a rooftop installation such as a water tank, steel, and the like. Examples of the support device include a laminated rubber and a coil spring. Examples of the damping mechanism include an oil damper. And viscoelastic dampers.

  According to the above-described vibration damping device (TMD), the mass body vibrates due to inertia in response to the input vibration to the vibration damping object. At this time, if the vibration period of the mass body and the period of the input vibration match, the input vibration energy to the damping object is absorbed by the inertial mass effect by the mass body, and the response vibration of the damping object is reduced. Can do. Further, the vibration of the mass body can be attenuated by absorbing the vibration energy of the mass body by the damping mechanism described above.

JP-A-4-83070

  By the way, in view of recent energy problems, there is a demand for effective use of vibration energy absorbed by the damping mechanism described above. In particular, the above-described vibration damping device has a function of suppressing the vibration of the structure mainly due to wind load, and the mass body vibrates on a daily basis, so that it is significant to effectively use the vibration energy.

  The present invention responds to the above-mentioned demand, and reduces response vibration of the object to be controlled with respect to input vibration due to earthquake motion or wind load, and converts vibration energy of the mass body absorbed by the damping mechanism into electric energy. The purpose is to provide a vibration control device that can be effectively used as an electrical resource.

  The vibration damping device according to the present invention includes a mass body disposed separately from the vibration damping object, a support mechanism that supports the mass body so as to be relatively displaceable with respect to the vibration damping object, and the mass body. And a damping mechanism for attenuating relative displacement between the damping object and the damping object, wherein the damping mechanism includes a first fixing portion fixed to the mass body and a damping structure fixed to the damping structure. And a damping body interposed between the first fixing section and the second fixing section, and the damping body includes the mass body and the damping object. And a pair of electrodes laminated on both surfaces of the dielectric substrate, respectively, and the pair of electrodes is formed by stretching and deformation of the dielectric substrate. It is characterized by having a power generation property in which electric energy is generated from the electrode.

  Due to such characteristics, when vibration due to earthquake motion or wind load is input to the object to be controlled, the mass body relatively vibrates in response to the input vibration. At this time, if the period of vibration of the mass body and the period of input vibration coincide, the input vibration energy to the object to be controlled is absorbed by the inertial mass effect by the mass body.

  In addition, the damping body of the damping mechanism expands and contracts with the relative displacement between the mass body and the object to be controlled, so that the vibration energy of the mass body is absorbed and the vibration of the mass body is attenuated. At this time, the surface area of the dielectric substrate of the attenuating body is increased with the expansion and deformation of the attenuating body, and the thickness of the dielectric substrate is reduced to reduce the distance between the pair of electrodes. Thereby, an electric charge proportional to the surface area of the dielectric substrate appears on the pair of electrodes. Subsequently, when the stretched and attenuating body contracts and returns to its original shape, the surface area of the dielectric substrate is reduced and the distance between the pair of electrodes is increased. As a result, the interval between the charges on the dielectric substrate is narrowed and the charges are pushed out and released as electrical energy.

Moreover, it is preferable that the vibration damping device according to the present invention includes a storage battery facility that is electrically connected to the pair of electrodes.
Thereby, the above-described electrical energy generated in the attenuation body is stored in the storage battery facility.

According to the vibration damping device of the present invention, the input vibration energy to the vibration damping object is absorbed by the inertial mass effect of the mass body, so that the response vibration of the vibration damping object can be reduced.
In addition, since electrical energy is generated from the damping body due to expansion and deformation of the damping body due to the relative displacement between the mass body and the vibration suppression object, the vibration energy of the mass body absorbed by the damping mechanism is converted into electrical energy. It can be effectively used as an electrical resource.

It is a side view of the vibration damping device for describing an embodiment of the present invention. It is a fracture perspective view of a damping mechanism for explaining an embodiment of the invention. It is an expanded sectional view of the damping mechanism for describing an embodiment of the present invention. It is a fracture | rupture perspective view of the damping mechanism for demonstrating the modification of this invention.

  Embodiments of a vibration damping device according to the present invention will be described below with reference to the drawings.

  As shown in FIG. 1, the vibration damping device 1 is a mass damper type vibration damping device that absorbs vibration energy input to the vibration damping object X by the inertial mass effect of the mass body 2. As a schematic configuration of the vibration damping device 1, a mass body 2 disposed separately from the damping object X, and the mass body 2 can be displaced in a horizontal direction relative to the damping object X. A support mechanism 3 for supporting, and an attenuation mechanism 4 for attenuating the relative displacement between the mass body 2 and the vibration suppression object X are provided. Note that the above-described vibration suppression object X is a structure such as a high-rise building or a tower.

  The mass body 2 has a weight that can absorb the vibration of the vibration control object X by the inertial mass effect. For example, a weight made of a metal, a concrete lump, or the like may be provided as the mass body 2. Alternatively, a heavy device or facility may be used as the mass body 2, or a water storage tank that stores water or the like may be used as the mass body 2. Further, the mass body 2 can be arranged in the intermediate layer of the vibration control object X in addition to the roof of the vibration control object X.

  The support mechanism 3 is a spring element composed of a plurality of multi-stage laminates 30 and is interposed between the mass body 2 and the vibration control object X. More specifically, the multistage laminate 30 described above has a configuration in which a plurality of laminates 31 that can be shear-deformed in the horizontal direction are laminated in a plurality of stages via a stabilizing plate 32, and each of the stages has a plurality of laminates 31. Is arranged. The laminated body 31 is a columnar body having a laminated structure in which a plurality of soft plates made of rubber or the like and hard plates made of steel plates or the like are alternately laminated. It is easy to shear in the horizontal direction.

  The damping mechanism 4 is a damper that absorbs energy by expanding and contracting the elastically deformable damping body 42, and is interposed between the mass body 2 and the vibration control object X. More specifically, as shown in FIGS. 1 and 2, the damping mechanism 4 includes a first fixing portion 40 fixed to the mass body 2, a second fixing portion 41 fixed to the vibration suppression object X, And an attenuating body 42 interposed between the first fixing portion 40 and the second fixing portion 41.

  The first fixed portion 40 is a substantially cylindrical columnar portion that is suspended from the lower surface of the mass body 2. The second fixed portion 41 is a cylindrical peripheral wall portion erected on the vibration suppression object X, and the tip end portion (lower end portion) of the first fixed portion 40 described above is inside the second fixed portion 41. Has been inserted. The first fixing portion 40 and the second fixing portion 41 described above are arranged coaxially with a central axis O extending in the vertical direction as a common axis, and the first fixing portion 40 is the center of the second fixing portion 41. It is arranged in the part.

  The attenuating body 42 is a plate member having an annular shape in plan view formed between the first fixing portion 40 and the second fixing portion 41 over the entire circumference, and is arranged perpendicular to the above-described central axis O. It is installed. The inner edge of the attenuation body 42 is fixed to the outer peripheral surface of the first fixing portion 40 described above, and the outer edge of the attenuation body 42 is fixed to the inner peripheral surface of the second fixing portion 41 described above.

  The above-described attenuation body 42 has a structure similar to that of a capacitor in which a dielectric is sandwiched between electrodes. As shown in FIG. 3, the first fixed portion 40 (mass body 2) and the second structure are schematically shown. A flexible sheet-like dielectric substrate 43 that elastically expands and contracts in accordance with a horizontal displacement relative to the fixing portion 41 (vibration target X) is laminated on both surfaces of the dielectric substrate 43. A sandwich structure having a pair of electrodes 44 and 45 is formed.

  The dielectric substrate 43 is a stretchable plate portion made of an electrostrictive polymer, and contracts in the plate thickness direction when expanded in the plate surface direction, and expands in the plate thickness direction when contracted in the plate surface direction. Specifically, the dielectric substrate 43 is a dielectric film made of an elastically deformable dielectric elastomer such as acrylic, urethane, or silicon.

  The electrodes 44 and 45 are conductive films that cover both surfaces of the dielectric substrate 43. The electrodes 44 and 45 are flexible electrodes having flexibility, and can be expanded and contracted following the expansion and contraction of the dielectric substrate 43. Specifically, the electrodes 44 and 45 are made of, for example, conductive grease or a polymer material mixed with carbon powder.

  In addition, the above-described attenuation body 42 is electrically connected to the storage battery facility 5 installed in the vibration suppression object X. More specifically, as shown in FIG. 3, the above-described electrodes 44 and 45 are electrically connected to the storage battery facility 5 through wirings 46, respectively. The storage battery facility 5 is formed of a known secondary battery such as a sodium sulfur battery, a lithium ion battery, a lead battery, or a nickel metal hydride battery. Note that the storage battery facility 5 may be either a regular or emergency (for disaster prevention) power storage facility. Moreover, the initial charge may be given to the pair of electrodes 44 and 45 described above using the power stored in the storage battery facility 5 as a power source, or the power supply from the power source different from the storage battery facility 5 may be applied to the pair of electrodes 44 and 45. An initial charge may be applied.

  Next, the operation of the vibration damping device 1 configured as described above will be described.

  When lateral vibration due to earthquake motion or wind load is input to the vibration suppression object X, the mass body 2 is displaced in the horizontal direction relative to the vibration suppression object X due to inertia. The mass body 2 vibrates. At this time, if the period of vibration of the mass body 2 and the period of input vibration coincide with each other, the input vibration energy to the damping object X is absorbed by the inertial mass effect of the mass body 2.

  Further, the damping body 42 of the damping mechanism 4 elastically expands and contracts with the relative displacement between the mass body 2 and the damping object X. That is, when the first fixed portion 40 fixed to the mass body 2 is relatively displaced to one side in the horizontal direction with respect to the second fixed portion 41 fixed to the vibration suppression object X, the other side ( The portion on the opposite side of the displacement direction of the first fixed portion 40 is pulled and elastically stretched. Thereby, the vibration energy of the mass body 2 is absorbed, and the vibration of the mass body 2 is attenuated.

  At this time, in the stretched and deformed portion of the attenuation body 42, the surface area of the dielectric base 43 is increased and the thickness of the dielectric base 43 is reduced along with the stretch and deformation, so that the gap between the pair of electrodes 44 and 45 is increased. The distance becomes narrower. As a result, charges proportional to the surface area of the dielectric substrate 43 appear on the pair of electrodes 44 and 45. Subsequently, when the stretched and deformed portion of the attenuation body 42 contracts by the reciprocation of the mass body 2 and returns to the original shape, the surface area of the dielectric substrate 43 in the portion is reduced and the pair of electrodes 44, The distance between 45 increases. As a result, the interval between the charges on the dielectric substrate 43 is narrowed and the charges are pushed out and released as electric energy. The electrical energy is transmitted to the storage battery facility 5 via the wiring 46 and stored in the storage battery facility 5. The electrical energy stored in the storage battery facility 5 is used as normal or emergency power.

  According to the damping device 1 described above, the input vibration energy to the damping object X is absorbed by the inertial mass effect of the mass body 2, so that the response vibration of the damping object X can be reduced.

In addition, since electrical energy is generated from the damping body 42 due to the expansion and deformation of the damping body 42 due to the relative displacement between the mass body 2 and the damping object X, the vibration energy of the mass body 2 absorbed by the damping mechanism 4 is reduced. It can be converted into electrical energy and effectively used as an electrical resource.
In addition, since the electric energy generated from the attenuation body 42 is stored in the storage battery facility 5 and electric power is appropriately supplied from the storage battery facility 5, stable power supply can be performed.

The embodiments of the vibration damping device according to the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and can be appropriately changed without departing from the scope of the present invention.
For example, the vibration damping device 1 in the above-described embodiment is a passively controlled mass damper (TMD), but the present invention may be an active controlled mass damper (AMD), or semi-active controlled. It may be a mass damper (ATMD).

  Further, in the above-described embodiment, the annular plate-like attenuation body 42 is interposed between the first fixed portion 40 and the second fixed portion 41, but the attenuation body of the present invention has another configuration. For example, as shown in FIG. 4A, a plurality of attenuating bodies 42 can be arranged in parallel at intervals in the direction of the central axis O. Alternatively, as shown in FIG. As shown in FIG. 4, the belt-like attenuation body 142 may be provided between the first fixing portion 40 and the second fixing portion 41, and the belt-like attenuation body 142 is intermittently disposed in the circumferential direction. It may be a configuration.

Further, in the above-described embodiment, the support mechanism 3 including the multi-layer stack 30 is provided. However, the present invention can also use a support mechanism having another configuration, for example, a coil spring-like spring. The support mechanism which consists of may be sufficient.
Further, the present invention may be a pendulum type mass damper in which a rotatable suspension arm is provided as a support mechanism, and a mass body is suspended on the suspension arm.

  In the above-described embodiment, the support mechanism 3 and the damping mechanism 4 are interposed between the mass body 2 and the vibration suppression object X, respectively. However, in the present invention, the damping mechanism 4 includes the mass body. 2 and the support mechanism 3 may be interposed, or may be interposed between the mass body 2 and the vibration control object X.

  Further, the vibration damping device 1 in the above-described embodiment is a horizontal vibration damping device that exhibits vibration damping performance against horizontal input vibration. For example, a vibration damping device that causes rolling such as a high-rise building or a tower is provided. Although the present invention is installed on the vibration target X, the present invention is a vertical type in which the mass body is relatively displaced in the vertical direction with respect to the vibration suppression target, and exhibits damping performance against the input vibration in the vertical direction. The vertical vibration damping device may be installed on a vibration damping object that causes vertical vibration such as a bridge or an overhead bridge.

Moreover, in above-mentioned embodiment, although the mass body 2 and the storage battery equipment 5 are each provided separately, this invention can also use the storage battery equipment 5 as a mass body.
Furthermore, the present invention can omit the storage battery facility 5 and connect the electrodes 44 and 45 of the attenuation body 42 and the electrical device to directly supply power from the attenuation body 42 to the electrical device. Also good.

  In addition, in the range which does not deviate from the main point of this invention, it is possible to replace suitably the component in above-mentioned embodiment with a well-known component, and you may combine the above-mentioned modification suitably.

DESCRIPTION OF SYMBOLS 1 Damping apparatus 2 Mass body 3 Support mechanism 4 Damping mechanism 5 Storage battery equipment 40 First fixing part 41 Second fixing part 42 Attenuating body 43 Dielectric substrate 44, 45 Electrode 142 Attenuating body X Damping object

Claims (2)

A mass body arranged separately from the vibration control object, a support mechanism that supports the mass body so as to be relatively displaceable with respect to the vibration control object, and a relative relationship between the mass body and the vibration control object A damping device comprising a damping mechanism for damping displacement,
The damping mechanism includes a first fixing part fixed to the mass body, a second fixing part fixed to the vibration damping structure, and a gap between the first fixing part and the second fixing part. Equipped with a damping body,
The damping body includes a flexible dielectric base that expands and contracts in accordance with relative displacement between the mass body and the damping object, and a pair of electrodes that are respectively laminated on both sides of the dielectric base. And a damping device characterized in that it has a power generation property in which electric energy is generated from the pair of electrodes by expansion and contraction of the dielectric substrate. The vibration damping device according to claim 1,
A vibration damping device comprising a storage battery facility electrically connected to the pair of electrodes.

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