KR100720080B1 - Semiactive apparatus for damping vibration of structures - Google Patents

Abstract

The present invention provides a fixed plate, a rotating plate coupled to the fixed plate in a structure rotatable about an axis eccentric from the center, and the contact plate and the rotating plate are in contact with each other by the rotation of the rotating plate and the rotating plate whose contact surface area with the fixed plate is changed in accordance with the rotation angle change. A damper including a friction piece coupled to a release portion, a rheological fluid provided at a portion where the rotating plate and the fixed plate are in constant contact with each other, a coil supplying a magnetic field to the rheological fluid, and a power supply unit applying power to the coil; A first link member having one end coupled to the fixed plate and the other end hinged to the first structure; And a second link member having one end coupled to the rotating plate and the other end coupled to the second structure capable of changing a distance from the first structure, such that the damping force for protecting the structure is changed according to the magnitude of the external force applied to the structure. And it provides a semi-active structure vibration damping device that can be easily changed the damping force even after being mounted on the structure.

Structures, vibration, damping, dampers, friction, rheological fluids

Description

Semiactive apparatus for damping vibration of structures}

1 is a cross-sectional view showing a shape in which a conventional vibration damping device is mounted on a structure.

2 is a front view showing a shape in which the semi-active structure vibration damping device according to the present invention is coupled to a structure.

3 is an exploded perspective view of the damper shown in FIG. 2.

4 is a cross-sectional view taken along the line A-A shown in FIG. 2.

FIG. 5 is a front view illustrating a shape in which a structure of a structure is modified in the state shown in FIG. 2.

6 is a front view showing a second embodiment of the semi-active structure vibration damping apparatus according to the present invention, in which two frames are coupled to one damper.

FIG. 7 is a front view illustrating a shape in which a structure of a structure is modified in the state shown in FIG. 6.

8 is a front view showing a third embodiment of the semi-active structure vibration damping apparatus according to the present invention, which is configured to hinge the frame to the damper.

FIG. 9 is a view illustrating a shape in which a structure of a structure is modified in the state shown in FIG. 8.

FIG. 10 is a front view showing a fourth embodiment of the semi-active structure vibration damping device according to the present invention, in which two frames are hinged to one damper.

FIG. 11 is a front view illustrating a shape in which a structure of a structure is modified in the state shown in FIG. 10.

<Description of the symbols for the main parts of the drawings>

100: damper 110: fixed plate

120: rotating plate 132: bolt

134: nut 140: friction piece

150 rheological fluid 162 coil

170: control unit 200: frame

210: first link member 220: second link member

The present invention relates to an apparatus for damping vibration of a structure, and more particularly, to an apparatus for damping vibration applied to a building by using a hinged damper whose rotational resistance is changed according to a rotation angle.

When the structural member is subjected to a horizontal external force, torsion or similar horizontal movement occurs. Torsion, in particular in building structures or towers, can result in severe impact or even collapse of the structure.

As described above, the vibration damping device for absorbing the shock and vibration applied to the structure plays an important role in protecting the structure, for example, a house or a similar building structure, and the vibration damping device exists in many variations. Vibration damping devices are generally means of damping movement by frictional forces between two moving parts attached between structural members of a building or by fluid flowing and pressurizing between two chambers through a restricted tube. For example, there are active dampers that actively change the damping effect corresponding to an external state, and passive dampers having a predetermined magnitude of damping effect.

Hereinafter, a conventional damper will be described with reference to the accompanying drawings.

1 is a cross-sectional view showing a shape in which a conventional vibration damping device is mounted on a structure.

As shown in FIG. 1, a conventional vibration damping device is coupled between the first structure 1 and the second structure 2.

The other end of the first member 7 is connected to the first structure 1 by the rotary joint 6, the other end of the second member 4 is connected to the second structure 2, and the first member 7 is connected to the second structure 2. ) And each end of the second member 4 are connected. Each rotary joint 6 is secured by bolts extending through the structures 1, 2 and the members 4, 7.

At one of the rotary joints 6 or at each of the rotary joints 6 a damping member 3 is coupled, wherein the damping member 3 has a frictional force so as to prevent rotation of the respective members 4, 7. It is large and made of elastic material to absorb external vibrations. The magnitude of the damping force of the vibration damping device is changed in accordance with the fastening force of the rotary joint (3).

The damping members 3, 5 are typically made of a material containing asbestos, known as brakes or clutches, or thick, soft silicone pads. Therefore, the external force applied so that the mutual spacing between the first structure 1 and the second structure 2 is changed or twisted is absorbed by the damping member 3.

The damping member 3 may also include one or more parts of both kinds of material, which are sandwich structures consisting of one or more layers of viscoelastic material and one or more layers of friction material.

However, such a conventional damping device supports the structure with the same size irrespective of the magnitude of the external force applied to the structure, so that the deformation of the structure cannot be prevented when the external force applied to the structure is large, and it is damped after being mounted on the structure. Since the force cannot be controlled, there is an inconvenience that the damping force must be adjusted by tightening or releasing the bolt 50 by approaching the damper when a change in the damping force is required as various conditions change.

In particular, when the damper composed of the above structure is mounted on a large building structure, the damping force adjustment operation becomes more difficult because the access to the damper is not easy.

The present invention has been made to solve the above problems, the damping force for protecting the structure is changed according to the magnitude of the external force applied to the structure, vibration damping that can easily change the damping force even after being mounted on the structure The purpose is to provide a device.

Semi-active structure vibration damping device according to the present invention for solving the above problems, and a damper including a fixed plate and a rotating plate coupled to the fixed plate in a structure rotatable about an axis eccentric from the center; One end is configured to include a frame coupled to the rotating plate.

In addition, the semi-active structure vibration damping device according to the present invention, the damper including a fixed plate and a rotating plate coupled to the fixed plate in a structure rotatable about an axis eccentric from the center; A first link member having one end coupled to the fixed plate; One end may be configured to include a second link member coupled to the rotating plate.

In this case, when the first link member and the second link member are fixedly coupled to the fixed plate and the rotating plate, respectively, the coupling angle of the first link member and the second link member is preferably configured to be less than 180 degrees.

In addition, when the first link member and the second link member are coupled to the fixed plate and the rotating plate in a rotatable structure, respectively, the first link member and the second link member are preferably coupled to the edge of the fixed plate and the rotating plate, respectively. In this case, the vibration damping device according to the present invention includes two first link members having the other end hinged to different points of the first structure and one end hinged to the fixing plate edges of different points, and the other end of the second structure. It may be configured to include two first link members hinged to different points and one end hinged to the rotary plate edge of the different point.

The stationary plate and the rotating plate are fastened by bolts and nuts passing through the rotating shaft of the rotating plate.

The rotating plate is formed in a shape in which the contact surface area with the fixed plate is changed in accordance with the rotation angle change, and the friction piece is further provided at a portion where the fixed plate and the rotating plate are contacted and released by the rotation of the rotating plate.

In addition, a rheological fluid whose viscosity changes according to a magnetic field change is provided at a portion where the rotating plate and the fixed plate are in constant contact with each other, and a coil for supplying a magnetic field to the rheological fluid and a power supply unit for applying power to the coil are further provided.

At this time, it is preferable that a control unit for controlling the operation of the power supply unit is provided.

One surface of the rotating plate of the portion that is in constant contact with the fixed plate is formed with a fluid groove filled with the rheological fluid.

Hereinafter, an embodiment of a semi-active structure vibration damping device according to the present invention will be described with reference to the accompanying drawings.

FIG. 2 is a front view illustrating a shape in which a semi-active structure vibration damping apparatus according to the present invention is coupled to a structure, FIG. 3 is an exploded perspective view of the damper 100 shown in FIG. 2, and FIG. 4 is shown in FIG. 2. It is sectional drawing cut along the AA line.

2 to 4, the semi-active structure vibration damping apparatus according to the present invention includes a damper 100 fixedly coupled to the first structure 10, one end of which is coupled to the damper 100, and the other end of which is provided. 1 is configured to include a frame 200 which is hinged to the second structure 20, the distance from the structure 10 is changeable.

In this embodiment, the damper 100 and the frame 200 are coupled to the first structure 10 and the second structure 20 by the first fixing means 12 and the second fixing means 22, respectively. It may be directly coupled to the structure without a separate fixing means.

The damper 100 is formed in a disk shape having a fluid groove 212 in a predetermined space therein, and a fixing plate 110 fixed to the first structure 10 by the first fixing means 12 and the fixing plate 110. Rotating plate 120 is formed in a disk shape having a diameter smaller than) and coupled to the fixed plate 110 so that the fluid groove 212 is closed with the bolt 132 and the nut 134 so that the rotation axis is eccentrically upward from the central axis ), A rheological fluid 150 provided in the fluid groove 212, a coil 162 coupled to surround an outer surface of the rheological fluid 150 to supply a magnetic field to the rheological fluid 150, It includes a power supply unit for applying power to the coil 162, and a control unit 170 for controlling the operation of the power supply unit. At this time, the coil 162 is preferably coupled to be spaced apart from the outer wall surface of the fluid groove 212 so as not to be in direct contact with the rheological fluid 150.

As the rotation around the axis of rotation, the friction plate 140 is provided on the fixed plate 110 so that the contact area with the rotating plate 120 is widened. For example, the fixing plate 110 is provided with a friction piece 140 having a greater frictional force than the fixing plate 110 at the upper edge of the surface in contact with the rotating plate 120. Therefore, as shown in FIG. 2, when the fixing plate 110 and the rotating plate 120 are positioned to coincide with each other, the friction piece 140 does not contact the rotating plate 120, but the rotating plate 120 rotates to fix the fixing plate 110. In the case where the center of the rotating plate 120 is offset from each other, the friction piece 140 contacts the rotating plate 120. In this embodiment, the fixing plate 110 and the rotating plate 120 is formed in a disk shape, the shape of the fixing plate 110 and the rotating plate 120 is not limited to this and can be variously changed. In addition, the coupling position of the fluid groove 212 and the friction piece 220 is not limited to being provided on the fixed plate 110 as shown in this embodiment, it may be provided on the rotating plate 120 plate.

Therefore, the rheological fluid 150 contained in the fluid groove 212 should not flow out of the fixing plate 110 unless it is released by the coupling of the fixing plate 110 and the rotating plate 120. To this end, the shortest distance from the rotating shaft to the outer circumferential surface of the rotating plate 120 should be larger than the longest distance from the rotating shaft to the inner wall of the fluid groove 212. At this time, the power supply unit is configured to include a wire 164 for transmitting a current between the control unit 170 and the coil 162. Therefore, the user can easily friction between the rotating plate 120 and the friction piece 140 by changing the viscosity of the rheological fluid 150 through the operation of the control unit 170 even when the fixed plate 110 and the rotating plate 120 are installed in the structure. Can be changed.

In addition, the rheological fluid 150 used in the present invention may be applied to various types of rheological fluids such as an electron rheological fluid whose viscosity changes with an electric field change or a magnetorheological fluid whose viscosity changes with a magnetic field change. Can be. In this embodiment, a case in which a magnetorheological fluid whose viscosity is changed by a magnetic field change is applied will be described.

FIG. 5 is a front view illustrating a shape in which a structure of a structure is modified in the state shown in FIG. 2.

When an external force is applied to move the first structure 10 to the right in the state shown in FIG. 2, the damper 100 also moves to the right. Since the frame 200 is hinged to the second structure 20 and fixedly coupled to the damper 100, the frame 200 is rotated in a clockwise direction by using a coupling point with the second fixing means 22 as a rotating shaft, and the fixing plate 110. And the rotating plate 120 is rotated so as to slide on the portion through which the bolt 132 and the nut 134 through the rotation axis.

At this time, since the rotation center is spaced apart from the center point in the direction in which the friction piece 140 is located, the rotating plate 120 contacts the friction piece 140 when rotating. Therefore, the external force applied to the structure is converted into a frictional force between the rotating plate 120 and the friction piece 140 is damped. The frictional force as described above is changed according to the fastening force of the bolt 132 and the nut 134 to couple the fixed plate 110 and the rotating plate 120, the rotating plate 120 and the rotating angle of the rotating plate 120 and the friction piece ( Since the area contacted by 140 increases, the magnitude of the frictional force also increases proportionally. In addition, when the rotation angle of the rotating plate 120 increases as the external force increases, the contact area between the rotating plate 120 and the friction piece 140 increases, thereby increasing the friction force between the rotating plate 120 and the friction piece 140. In addition, the vibration damping device according to the present invention increases the external force applied to the structure, that is, the ability to damp the external force, that is, the damping force is increased.

The magnitude of the damping force generated by the friction between the rotating plate 120 and the friction piece 140 is changed according to the fastening force of the bolt 132 and the nut 134. After the vibration damping device is mounted on the structure, the bolt 132 ) And the fastening force of the nut 134 is difficult. Therefore, when the vibration damping device is to be changed after the vibration damping device is mounted on the structure, the user manipulates the controller 170 to change the viscosity of the rheological fluid 150 to change the fixed plate 110 and the rotating plate 120. Change friction.

FIG. 6 is a front view showing a second embodiment of the semi-active structure vibration damping apparatus according to the present invention, in which two frames 200 are coupled to one damper 100, and FIG. 7 is shown in FIG. It is a front view which shows the shape which the structure of the structure changed in the state.

As shown in FIG. 6, the semi-active structure vibration damping device according to the present invention includes a damper 100 including a fixed plate 110 and a rotating plate 120, and one end of which is coupled to the fixed plate 110 and the other end of which is first. The first link member 210 is hinged to the structure 10, the other end is coupled to the second structure 20 which can change the distance to the first structure 10, the first end is coupled to the rotating plate 120 It may be configured to include a two link member 220. In a state where the structure is not deformed, the first link member 210 and the second link member 220 are coupled to form an angle of less than 180 degrees.

When the first structure 10 moves to the right in the state shown in FIG. 6, the first link member 210 and the second link member 220 are rotated in a direction in which the coupling angle increases. At this time, since the first link member 210 is fixedly coupled to the fixed plate 110 and the second link member 220 is fixedly coupled to the rotating plate 120, the fixing plate 110 and the rotating plate 120 are connected to the bolt 132. It rotates around a point where the nut 134 is fastened, and the rotating plate 120 and the friction piece 140 contact each other.

Since the structure of the damper 100 in which damping force is generated by the rotation of the fixed plate 110 and the rotating plate 120 is the same as that of the damper 100 shown in FIG. 2, a detailed description thereof will be omitted.

FIG. 8 is a front view showing a third embodiment of the semi-active structure vibration damping apparatus according to the present invention, which is configured such that the frame 200 is hinged to the damper 100, and FIG. 9 is a structure in the state shown in FIG. It is a front view showing the shape in which the structure of the strain is deformed.

As shown in FIG. 8, the vibration damping device according to the present invention has a damper 100 including a fixed plate 110 and a rotating plate 120, and both ends thereof are hinged to the first structure 10 and the fixed plate 110. It may be configured to include a first link member 210 to be coupled, and a second link member 220 hinged to both ends of the second structure 20 and the rotating plate 120. At this time, the first link member 210 and the second link member 220 is preferably coupled to the edge of the fixed plate 110 and the rotating plate 120, respectively.

When the external force is applied to move the first structure 10 to the right in the state shown in FIG. 8, the point where the first structure 10 and the first link member 210 are coupled and the second structure 20 and Since the point where the second link member 220 is coupled is far from each other, the first link member 210 and the second link member 220 are rotated in a direction in which the distance between the first link member 210 and the second link member 220 is located on the same line.

As the distance between the first link member 210 and the second link member 220 increases, the first link member 210 and the second link member 220 are rotated so that the fixed plate 110 and the rotating plate 120 rotate. It is preferable to be coupled to the edge of the rotating plate 120 and the friction piece 140.

FIG. 10 is a front view showing a fourth embodiment of the semi-active structure vibration damping apparatus according to the present invention, in which two frames 200 are hinged to one damper 100, and FIG. 11 is shown in FIG. It is a front view which shows the shape in which the structure of the structure was deformed in the opened state.

In addition, the vibration damping device according to the present invention, the damper 100 including the fixing plate 110 and the rotating plate 120, one end is hinged to the edge of the fixing plate 110 at different points and the other end of the first structure (10) Two first link members 210 which are hinged to different points of) and one end is hinged to the edge of the rotating plate 120 of different points and the other end is hinged to different points of the second structure 20 It may be configured to include two first link member 210 to be.

As such, when two first link members 210 are coupled to one fixing plate 110, the first structure 10 serves as one link, and the two first link members 210 each have separate links. It serves, and the fixing plate 110 forms a four-section link structure that serves as one link. Therefore, the first link member 210 is rotatable around the point coupled to the first structure 10, the fixed plate 110 is rotatable around the point coupled to the rotating plate 120.

In addition, even when two second link members 220 are coupled to one rotating plate 120, the second structure 20 serves as one link, and the two second link members 220 are separately provided. It serves as a link, and the rotating plate 120 forms a four-section link structure that serves as a link. Therefore, the second link member 220 is rotatable around the point coupled to the second structure 20, the rotating plate 120 is rotatable around the point coupled to the fixed plate (110).

Therefore, when an external force is applied to move the first structure 10 to the right in the state shown in FIG. 10, the first link member 210 rotates clockwise around the coupling point with the first structure 10. The second link member 220 rotates clockwise around the engagement contact with the second structure 20, and the rotating plate 120 is in contact with the friction piece 140.

As mentioned above, although this invention was demonstrated in detail using the preferable Example, the scope of the present invention is not limited to a specific Example and should be interpreted by the attached Claim. In addition, those skilled in the art should understand that many modifications and variations are possible without departing from the scope of the present invention.

The semi-active structure vibration damping apparatus according to the present invention has an advantage that the damping force for protecting the structure is changed according to the magnitude of the external force applied to the structure, and the damping force can be easily changed even after being mounted on the structure.

Claims (16)

delete delete delete delete delete A damper including a fixed plate fixed to the first structure and a rotating plate coupled to the fixed plate in a rotatable structure about an axis eccentric from a center; And It is configured to include; one end is coupled to the rotating plate and the other end is rotatably coupled to the second structure, The rotating plate is formed in a shape in which the contact surface area with the fixed plate is changed in accordance with the change of the rotation angle, characterized in that the friction piece is further provided at a portion where the fixed plate and the rotating plate alternately contact and release the contact by the rotation of the rotating plate. Vibration damping device. A damper including a fixed plate fixed to the first structure and a rotating plate coupled to the fixed plate in a rotatable structure about an axis eccentric from a center; And It is configured to include; one end is coupled to the rotating plate and the other end is rotatably coupled to the second structure, At the site where the rotating plate and the fixed plate are in constant contact, a rheological fluid whose viscosity is changed according to a magnetic field change is provided, a coil for supplying a magnetic field to the rheological fluid as power is applied, and a power supply unit for applying power to the coil. Vibration damping device characterized in that it further comprises. The method according to claim 7, And a control unit for controlling the operation of the power supply unit. The method according to claim 7, The rotating plate is a vibration damping device, characterized in that the fluid groove filled with the rheological fluid is formed on one surface of the portion that is always in contact with the fixed plate. A damper including a fixed plate and a rotating plate coupled to the fixed plate in a rotatable structure about an axis eccentric from a center; A first link member having one end coupled to the fixed plate and the other end rotatably coupled to the first structure; And And a second link member having one end coupled to the rotating plate and the other end rotatably coupled to the second structure. The rotating plate is formed in a shape in which the contact surface area with the fixed plate is changed in accordance with the change of the rotation angle, characterized in that the friction piece is further provided at a portion where the fixed plate and the rotating plate alternately contact and release the contact by the rotation of the rotating plate. Vibration damping device. A damper including a fixed plate and a rotating plate coupled to the fixed plate in a rotatable structure about an axis eccentric from a center; A first link member having one end coupled to the fixed plate and the other end rotatably coupled to the first structure; And And a second link member having one end coupled to the rotating plate and the other end rotatably coupled to the second structure. At the site where the rotating plate and the fixed plate are in constant contact, a rheological fluid whose viscosity is changed according to a magnetic field change is provided, a coil for supplying a magnetic field to the rheological fluid as power is applied, and a power supply unit for applying power to the coil. Vibration damping device characterized in that it further comprises. The method according to claim 10 or 11, And the first link member and the second link member are fixedly coupled to the fixed plate and the rotating plate, respectively, and the coupling angle of the first link member and the second link member is less than 180 degrees. The method according to claim 10 or 11, And a first link member and a second link member are rotatably coupled to a position spaced a predetermined distance from the center of the fixed plate and the rotating plate, respectively. The method according to claim 13, Vibration damping device further comprises a first link member and a second link member rotatably coupled to a position spaced a predetermined distance from the center of the fixed plate and the rotating plate, respectively. The method according to claim 11, And a control unit for controlling the operation of the power supply unit. The method according to claim 11, The rotating plate is a vibration damping device, characterized in that the fluid groove filled with the rheological fluid is formed on one surface of the portion that is always in contact with the fixed plate.

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