JPH04176975A - Vibration energy absorbing device for damping device - Google Patents

Abstract

PURPOSE:To effectively absorb vibration energy by fixing one of a pair of disks rotated relatively to a structure, winding a wire unslippably on a shaft body provided on the other disk, and inserting damping materials between both disks. CONSTITUTION:One of a pair of disks 10, 11 arranged face to face relatively rotatably on the common axis is fixed to a structure 3. A wire 1 transferring the vibration energy of the structure 3 is unslippably wound on a shaft body 13 provided on the other disk 10. The displacement quantity of the structure 3 at the time of vibration is converted into the rotation quantity of the other disk 10 via the wire 1. Damping materials 12, 12 deformed by the relative rotation and absorbing the vibration energy are inserted between outer peripheries of a pair of disks 10, 11.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to an energy absorbing device suitable for use in a vibration damping device for suppressing and damping the vibrations of a high-rise building, for example.

"Prior art and its problems" As a vibration damping device applied to structures such as high-rise buildings, both ends of a tension member such as a wire are fixed to the structure, and an energy absorbing device is installed in the middle of the tension member. A configuration has been proposed that includes. This is a system in which the displacement that occurs when a structure vibrates is transmitted to an energy absorption device via a tensile member, and the energy absorption device absorbs the vibration energy to suppress and damp the vibration.

By the way, hydraulic dampers have generally been adopted as vibration energy absorbing devices in such vibration damping devices, but hydraulic dampers do not require extremely large damping force, such as when damping high-rise buildings. Since this is not very efficient, it is usually necessary to use a large number of hydraulic dampers, which is not only disadvantageous in terms of equipment costs and maintenance, but also requires sufficient installation space, including the operating stroke. Since it is necessary to secure space, the space efficiency is not good.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a vibration energy absorbing device that is excellent in damping efficiency and space efficiency.

"Means for Solving the Problem" In order to achieve the above object, the invention of claim 1 provides a vibration energy absorption device for absorbing vibration energy of a structure transmitted via a wire and damping the vibration. One of a pair of discs arranged opposite each other so as to be relatively rotatable with a common axis is fixed to the structure, and the wire cannot be slipped around a shaft provided on the other disc. The structure is configured so that the amount of displacement during vibration of the structure is converted into the amount of rotation of the other disc via the wire, and the distance between the outer peripheries of the pair of discs is It is characterized by interposing a damping material which deforms due to their relative rotation and absorbs vibration energy.

In the above invention, it is desirable that the diameter of the shaft around which the wire is wound is set smaller than the distance from the center of rotation of the disk to the installation position of the damping material. Furthermore, it is conceivable to use a lead plug or a viscous fluid as the damping material.

Further, the invention of claim 5 is a vibration energy absorbing device for absorbing vibration energy of a structure transmitted via a wire and damping the vibration, the device having the shape of a hollow rectangular box containing a viscous fluid. A container is fixedly provided to the front structure, and a plate corresponding to the lid of the container is attached to the container so as to be freely displaceable in the horizontal and lateral direction □, and the wire is fixed to this plate. By this, the amount of displacement when the structure vibrates is converted into the amount of displacement of the plate relative to the container via the wire, and the lower surface of the plate has a plurality of plates facing in the direction of displacement of the plate. The brake plates are vertically disposed so as to be submerged in the viscous fluid, and each brake plate has a small hole formed therein to allow the passage of the viscous fluid.

"Operation" In the invention of claim 1, the displacement due to the vibration of the structure is transmitted to the energy absorbing device by the wire and converted by the rotational movement of the disk, and the rotational movement of the disk is converted by the deformation resistance force of the damping material. damping, thereby absorbing vibrational energy.

In the invention of claim 2, since the diameter of the shaft around which the wire is wound is smaller than the distance from the center of rotation to the installation position of the damping material, the damping material generated at the outer periphery of the disk is reduced. The damping force is amplified and transmitted to the structure by the "lever" principle, resulting in excellent damping efficiency.

In the invention of claim Xj[3, a lead plug is used as the damping material, and vibration energy is absorbed by the shear resistance of the lead plug.

In the fourth aspect of the invention, a viscous fluid is used as the damping material, and vibration energy is absorbed by the viscous resistance of the viscous fluid.

In the invention of claim 5, the displacement due to vibration of the structure is converted into a horizontal displacement of the plate relative to the container, and the damping plate attached to the plate reduces the resistance force of the viscous fluid in the container. By being displaced while receiving vibration, the vibration energy is absorbed by the viscous resistance force.

"Example" Embodiments of the present invention will be described below with reference to the drawings.

Each of the devices of the embodiments described below is used as a vibration energy absorbing device in a vibration damping device for a high-rise building as schematically shown in FIG. The vibration damping device consists of a wire 1 that is wound around a pulley 2 in a crossed state, and both ends of the wire 1 are fixed near the top floor of a structure 3. The structure is equipped with an energy absorption device A, and by transmitting the displacement when the structure 3 vibrates due to an earthquake or wind to the energy absorption device A via the wire 1, the vibration energy is absorbed by the device A. It is designed to suppress and damp vibrations by absorbing them.

A specific example of the vibration energy absorbing device A used in the vibration damping device as described above will be described below.

First, a first embodiment is shown in FIGS. 2 to 5.

In the device A1 of the first embodiment, a pair of discs 10.11 are combined so that they can rotate freely relative to each other with a common axis, and a damping material is used between the outer peripheries of both discs 10.11. It is configured such that a plurality of ship plugs 12 are attached at equal intervals.

In the device A1 having the above configuration, the lower disk 11 is fixed to the structure 3, and the wire 1 is wound around the shaft 13 of the upper disk lO so as not to slip. As a result, in this device A1, when the wire 1 is pulled in one direction as the structure 3 is displaced, the upper disk 10 rotates with respect to the lower disk 11, As a result, shearing deformation occurs in the lead plugs 12 as shown in FIG. 4, and the vibration energy of the structure 3 is absorbed by the hysteresis energy absorbed by the ship plugs 12.

In this device A1, since the wire 1 is wound around the shaft 13 of the upper disk 10 in a non-slip manner, the damping force Fd of this device A is amplified by the lever principle, and the structure This has the advantage that the amount of lead plug 12 used as damping material can be saved.

To explain this with reference to FIG. 5, when the device A is operated, the center axes of the disks 10 and 11 serve as the fulcrum of the lever, and the center of the mounting position of the lead plug 12 is the damping force FM. The point of application where the damping force Fd is transmitted to the wire 1 is the winding position of the wire 1. Therefore, the distance Rd from the fulcrum to the point of force is
Assuming that the distance from the fulcrum to the point of action is Rw, the force Fv transmitted to the wire 1 and the damping force Fd are as follows due to lever balance: Fv/Fd-Rd/Rv Fv=Fd(R6/Rv )-aF, d (breath is the arm ratio, a-Rd/Rv). That is, the force Fw transmitted from this device A1 to the structure 3 via the wire 1 is
The actual damping force Fd of I is amplified by one time,
For example, if the arm ratio is 1-2, the damping force will be doubled.

In this case, due to the principle of leverage, the amount of displacement δS at the point of force is one times the amount of displacement δW at the point of action.

In other words, there is a relationship of δd/δv−Rd/Rw=a. Therefore, the apparent damping coefficient Ce of this device A is 12 times the actual damping coefficient C, as shown in the following equation.

Ce=Fv/δv-a'F d/δd-s"c and,
Since the energy absorption capacity of this type of device is proportional to the amount of damping material, i.e. lead grag 12, the above device A,
In this case, the ship plug 12 is inversely proportional to the square of the arm specific gravity.
Therefore, the cost and size of the device can be sufficiently reduced.

As should be clear from the above explanation, the amplification of the damping force due to the lever principle becomes more pronounced as the arm ratio a becomes larger, that is, as the R4 dimension is larger and the Rw dimension is smaller. If it is made too large, the entire device becomes large, so it is necessary to set it in consideration of the installation space. Furthermore, if the Rv dimension is too small, it becomes difficult to wind the wire 1 around the shaft 13 and prevent it from slipping, so for example, a gear (sprocket) is attached to the shaft 13 and a chain is attached in the middle of the wire 1. The gears and the chain may be meshed with each other.

In addition, since this device A uses the rotational motion of the disc lO to absorb energy, only the disc lO rotates during operation, and for this reason, it is different from conventional general hydraulic dampers. There is no need to consider the stroke during operation and secure space for it, as is the case when using the device, and therefore, the device itself can be made more compact, which also improves space efficiency. It is something that can be done. This is extremely advantageous compared to the case where a conventional hydraulic damper or the like is used, considering that in the device A described above, the displacement amount δd at the point of effort becomes large due to the lever principle.

The vibration energy absorbing device A of the first embodiment has been described above, and next, the second embodiment will be described with reference to FIGS. 6 and 7. The device A of the second embodiment uses the viscous resistance of a viscous fluid (for example, a butane-based polymer material, etc.) as a damping force instead of the lead plug 12 in the first embodiment. be. That is, in the device A2 of the second embodiment, two ring plates 20.
21 are attached at intervals, and a viscous fluid 22 is held in an annular housing formed by the ring plates 20 and 21, and a similar plate is attached to the lower surface of the outer periphery of the upper disk lO. A ring plate 23 is attached, and the lower part of this ring plate 23 is connected to the viscous fluid 22 in the storage section.
It is designed to be submerged inside.

In the device AI of the second embodiment, similarly to the device A of the first embodiment, when the wire 1 is pulled to one side with the displacement of the structure 3, the upper disk 10 becomes the lower disk. 11
However, in this case, the viscous fluid 2
A shearing resistance force is generated at 2, and vibration energy is absorbed by the shearing resistance force. Further, in this second* embodiment as well, the damping force, that is, the shear resistance force of the viscous fluid 22, is amplified by the lever principle and transmitted to the τ structure 3, as in the first embodiment.

The magnitude of the damping force can be appropriately set by adjusting the degree and amount of viscosity of the viscous fluid 22, the size of the gap between each ring plate 2G, 23.21, etc. Also, apparatus A of this second embodiment.

In this case, the working stroke is theoretically unlimited.

Next, a third embodiment will be described with reference to FIGS. 8 to 10. In the apparatus As of the third embodiment, a disk 31 serving as a lid of the container 3o is rotatably mounted on a cylindrical container 30 containing a viscous fluid 22 similar to that of the second embodiment. and a plurality of each (in the illustrated example, four each
The ring plates 32 and 33 are fitted alternately at predetermined intervals and relatively rotatable.

That is, in the apparatus A3 of the third embodiment, the disc 31 corresponds to the disc IO in the first embodiment or the second embodiment, and the bottom surface 301 of the container 30 corresponds to the disc 10 in the first embodiment or the second embodiment. This corresponds to the disc 11 in Figure 8, and a viscous fluid 22 as a damping material is interposed between them.

Also in this third embodiment, the wire l wound non-slip around the shaft body 34 of the disc 31 is pulled in accordance with the displacement of the structure 3, so that the disc 31 is moved toward the container 30.
The vibration energy is absorbed by the shear resistance force of the viscous fluid 22 generated at this time. Also, in this case, the damping force is amplified by the principle of leverage, as in the first and second embodiments, and the ring plate 32
As in the case of the second embodiment, the damping force can be adjusted by adjusting the number of .33 plates and their mutual spacing.

In order to rotate the disc 31 relative to the container 30, as shown in FIG.
It is preferable to insert the upper end of the bearing 36 therethrough and install a bearing 36 therebetween. Further, as shown in FIG. 1θ, it is preferable to interpose a sealing material 37 between the outer periphery Ii of the disk 31 and the container 30 to prevent leakage of the viscous fluid 22.

Further, a fourth embodiment will be described with reference to FIGS. 11 to 814.

In the device A of the fourth embodiment, a rectangular plate 41 corresponding to a lid of the container 40 is attached to a rectangular box-shaped container 40 holding a viscous fluid 22 in a horizontally and laterally displaceable state. The wire 1 is fixed to the upper surface of the plate 41, so that when the wire 1 is pulled due to vibration of the structure 3, the plate 41 is displaced laterally with respect to the container 40. It has become. A plurality of brake plates 42 (five in the illustrated example) are attached to the lower surface of the plate 41 so as to face the displacement direction of the plate 41, and the plate 41 is connected to the container 4.
0, these brake plates 42 are attached to the container 4.
It is designed to be immersed in a viscous fluid 22 within 0. These brake plates 42 have a plurality of small holes 4 as shown in FIG.
3 is formed. The formation positions of these small holes 43 are set randomly, and the small holes 43 formed in adjacent brake plates 42 are not arranged in a straight line. This causes the viscous fluid 22 to flow through the small holes 4.
The frictional resistance when passing through 3 is sufficiently increased.

In addition, in FIGS. 11 to 14, the reference numeral 44 indicates the plate body 41.
45 is a bearing for displacing the plate 41; 46 is interposed between the plate 41 and the container 40; The sealing material 47 is an injection pipe for the viscous fluid 22, and 48 is a discharge pipe for the viscous fluid 22.

In the device A4 of the fourth embodiment, when the wire 1 is pulled due to the vibration of the structure 3, the plate body 41 is displaced with respect to the container 40, and the brake plate 42 along with the plate body 41 is moved against the viscous fluid 2.
2, the viscous fluid 22 generates a flow and flows between the brake plates 42, and further passes through small holes 43 formed in the brake plates 42.

Then, the vibration energy is absorbed by the viscous resistance force generated when the viscous fluid 22 flows between the brake plates 42, the frictional resistance force generated when it passes through the small holes 43, and the vortex-forming resistance force. .

In the device A of this fourth embodiment, a plurality of brake plates 4
Since the damping force is exerted by each of the components 2 and 2, it is possible to obtain a much larger damping force than a conventional hydraulic damper, etc., and it is also excellent in space efficiency. The container 40 can be made of concrete, making effective use of the dead space under the floor of the building, for example, on the lowest floor.In this way, the cost is low and construction is easy. It is particularly suitable for use as an energy absorbing device in vibration damping devices for buildings such as high-rise buildings.

In addition, in the apparatus A4 of this fourth embodiment, the container 40
In addition to the viscosity and amount of the viscous fluid 2 in the brake plate 4,
It goes without saying that the damping force can be freely set by appropriately setting the number and area of the holes 43, the number and size of the small holes 43, etc.

"Effects of the Invention" As explained in detail above, the invention of claim 1 converts the displacement caused by vibration of a structure into the rotational movement of a disk using a wire, and damps the rotational movement of the disk using a damping material. Since the structure is designed to absorb vibration energy by doing this, the disk only rotates during operation, and therefore the space required for the stroke during operation is not required, unlike when using a conventional general hydraulic damper. There is no need to reserve it, which has the advantage of improving space efficiency.

In the invention of claim 2, by making the diameter of the shaft around which the wire is wound smaller than the distance from the center of rotation to the installation position of the damping material, the damping force is amplified by the lever principle and the structure is This has the effect of providing excellent damping efficiency.

Further, in the invention of claim 3, since a lead plug is used as the damping material, the vibration energy of the structure is efficiently absorbed by the history absorption energy of the lead plug. Since this is used, there is an advantage that the stroke during operation can theoretically be unlimited.

Further, the invention of claim 5 converts the displacement due to vibration of the structure into the displacement of the plate relative to the container, and the braking plate attached to the plate is displaced while receiving the resistance force of the viscous fluid in the container. As a result, vibration energy is absorbed by the viscous resistance of the viscous fluid, and damping force is exerted by each of the plurality of damping plates. Therefore, the damping force is significantly larger than that of conventional hydraulic dampers. In addition, the container can be made of concrete, making effective use of the building's frame, so it can be used to absorb energy in vibration damping devices for buildings such as high-rise buildings. It is particularly suitable for use as a device.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a schematic configuration of a vibration damping device to which the device of the present invention is applied. Figures 2 to 5 show the first embodiment of the present invention; Figure 2 is a plan view, Figure 3 is a side sectional view, Figure 4 is an enlarged view of the main part, and Figure 5 is its operation. It is an explanatory diagram for explaining. Figures 6 and 7 are the second part of the present invention! iI! 6 is a plan view and FIG. 7 is a side sectional view. Figures 8 to 10t! I shows an M3 embodiment of the present invention, FIG. 8 is a side sectional view, and FIGS. 9 and 10 are enlarged sectional views of essential parts, respectively. 11 to 14 show a fourth embodiment of the present invention, in which FIG. 11 is an exploded perspective view showing an assembled state, and FIG.
21! 1 is a side view, FIG. 13 is a cross-sectional view, and FIG. 14 is an enlarged view of main parts. A, A I= A 4... Vibration energy absorption device, l... Wire, 3... Structure, 10.11... Disk, 12・・・・・・
Lead grag (damping material), 13... Shaft body, 22... Viscous fluid (damping material), 301...
...Container bottom (disc), 31, old...disc, 34...
... Shaft body, 40 ... Container, 41 ... Plate body, 42 ...
...Brake plate, 43...Small hole. 158 people Shimizu Corporation Figure 1 Figure 5 Figure 2 Figure 4 Figure 8/1 Figure 9 Figure 10 Figure 14 Figure 12 Figure 13 Ae: A -

Claims (1)

[Scope of Claims] (1) A vibration energy absorbing device for absorbing vibration energy of a structure transmitted through a wire and damping the vibration, which are arranged facing each other so as to be relatively rotatable about a common axis. By fixing one of the paired disks to the structure and winding the wire in a non-slip manner around the shaft provided on the other disk, the displacement of the structure during vibration can be reduced. The amount is converted into the amount of rotation of the other disk via the wire, and the outer peripheral portions of the pair of disks are deformed by their relative rotation to absorb vibration energy. A vibration energy absorbing device in a vibration damping device characterized by interposing a damping material. (2) The diameter of the shaft around which the wire is wound is set to be smaller than the distance from the rotation center of the disk to the installation position of the damping material. A vibration energy absorbing device in the vibration damping device described in . (3) The vibration energy absorbing device in the vibration damping device according to claim 1 or 2, wherein the damping material is a lead plug. (4) The vibration energy absorbing device in the vibration damping device according to claim 1 or 2, wherein the damping material is a viscous fluid. (5) A vibration energy absorbing device for absorbing vibration energy of a structure transmitted through a wire and damping the vibration, wherein a hollow rectangular box-shaped container containing a viscous fluid is attached to the structure. In addition to providing a fixed
By attaching a plate corresponding to the lid of the container so that it can be freely displaced horizontally and laterally to the container and fixing the wire to this plate, the amount of displacement during vibration of the structure can be adjusted to the plate via the wire. a plurality of brake plates are vertically disposed on the lower surface of the plate body so as to be submerged in the viscous fluid, and are oriented in the direction of displacement of the plate body; Moreover, the vibration energy absorbing device in the vibration damping device is characterized in that the damping plates are formed with small holes that allow passage of viscous fluid.