JPH02272176A - Vibration controller - Google Patents

Abstract

PURPOSE:To damp the vibration of two or more different directions with a vibration controller by providing a common storage section to the central part of a tank keeping liquid in a way of having the open liquid level, and providing four or more wave motion force receiving sections around the common storage section. CONSTITUTION:A vibration controller 5 having a tank 6 keeping a liquid inside thereof in a way of having the open liquid level 7a is formed. A common storage section 6c is provided to the central part of the tank 6 of the vibration controller 5, and a specific number of four or more wave motion force receiving sections 6b1-6b4 are provided around the common storage section so as to oppose to each other. One vibration controller 5 damps the vibration of two or more different directions AB and CD.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a vibration damping device suitable for use in damping vibrations generated in structures such as buildings due to earthquakes, wind, etc.

(b), Prior Art FIG. 3 is a plan view showing an example of a conventional vibration damping device and its installation mode.

Recently, as shown in Fig. 3, a vibration damping device 1 consisting of a tank 2 containing a liquid 3 such as water having a rocking frequency matching the natural frequency of the structure has been installed in the second part of the structure. installed,
A proposal has been made to absorb the vibrations occurring in the structure using the wave energy of the liquid 3 in the tank.

The tank 2 had a rectangular planar shape with its longitudinal direction extending in the wave direction of the liquid 3 stored therein.

(C) 2 Problems to be solved by the invention Therefore, as in the case of an earthquake, arrow A.

In order to absorb vibrations in two different horizontal directions such as the B direction and the C and D directions, it is usually necessary to install at least one vibration damping bag w1 in each direction, which requires a relatively large amount of installation space. There was an inconvenience that made it necessary.

SUMMARY OF THE INVENTION An object of the present invention is to provide a vibration damping device that eliminates the above-mentioned drawbacks, is capable of absorbing vibrations in different directions such as two horizontal directions, and requires relatively little installation space.

(d)9 Means for solving the problems, that is, the present invention has a tank (6), and the tank (6)
In a vibration damping device (5) in which a liquid (7) is stored with an open liquid surface (7a) inside, a common storage part (6c) is provided in the center of the tank, and a common storage part (6c) is provided around the common storage part (6C). to 4
It is constructed by providing more than one wave force receiver (6b) facing each other.

Note that numbers in parentheses are for convenience and indicate corresponding elements in the drawings, and therefore, this description is not limited to the descriptions on the drawings.

The same applies to the column "r(e), effect" below.

(e) Zero effect With the above-described configuration, the present invention acts so that the common storage portion (6c) is shared by the wave force receiving portions (6b) facing each other.

(f), Example Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a plan view showing one embodiment of a vibration damping device according to the present invention, and FIG. 2 is a plan view showing an example of an installation mode of the vibration damping device shown in FIG.

As shown in FIG. 2, a plurality of vibration damping devices 5 according to the present invention are arranged on the rooftop or machine room above the structure 9, and these vibration damping devices 5 are arranged as shown in FIG. As shown, it has a tank 6. The tank 6 has a tank body 6a having a cross-shaped planar shape. A common reservoir 6c is provided in the center of the tank body 6a, and around the common reservoir 6C are wave force receivers 61) or 4
They are formed in a shape that faces each other. Further, each wave force receiver 6b has a plurality of damping members 6d made of meshes, etc., and an arrow A indicating the wave direction in each wave force receiver 6b.
The tank 6 is provided perpendicularly to the B, C, and D directions, and a liquid 7 such as water is stored in the tank 6 to form an open water surface 7a. Note that the width and length of each wave force receiving portion 6b are all formed to have the same length Ll.

Since the vibration damping device 5 has the above-described configuration, no vibration occurs in the structure 9 under normal conditions, so that the liquid level 7a of the liquid 7 stored in the tank 6 is in a horizontal state, that is, as shown in the figure. It is held parallel to the inside paper surface. Next, if the structure 9 vibrates horizontally in the directions of arrows A and B due to an earthquake, wind, etc., the tank 6 also vibrates in the directions indicated by the arrows A and B in synchronization with the vibration of the structure 9.
, vibrates in the B direction. Then, the liquid 7 stored in the tank 6 is transferred between the wave force receivers 6b□, 6b, which are provided opposite to each other in the directions of the arrows A and B, via the common reservoir 6c. Waves are started in directions A and B, and the vibrations of the structure 9 are absorbed by the wave energy. Further, the wave motion of the liquid 7 is attenuated by the damping member 6d provided in the wave force receiving portion 6b1.6b, and effective damping properties can be imparted to the vibration damping device 5. In this case, no wave motion that is effective in damping the vibrations of the structure 9 is generated in the liquid 7 in the wave force receivers 6b2, 6b4.

In addition, the structure 9 is located at an arrow C, which is perpendicular to the arrow A, B direction.
When the tank 6 vibrates in the direction D, the tank 6 also vibrates in the directions C and D in synchronization with the vibration of the structure 9. Then, the liquid 7 stored in the tank 6 is transferred to the arrow C via the common storage part 6c between the wave force receiving parts 6b and 2.6b provided opposite to each other in the directions of the arrows C and D. , D direction, and the vibration of the structure 9 is absorbed by the wave energy. Further, the wave motion of the liquid 7 is caused by the wave force receiving portion 6b2.6b.
The vibration damping device 5 can be damped by the damping member 6d provided in the vibration damping device 5. In addition,
At this time, no wave motion effective for damping the vibrations of the structure 9 is generated in the liquid 7 in the wave force receiving portions 6b and 6b3.

In addition, in the above-mentioned embodiment, the wave force receiving portion 6b of the tank 6 is
Although the case where the wave force receivers 6b are provided with a pitch of 0" has been described, as long as the wave force receivers 6b are provided facing each other via the common reservoir 6C provided in the center of the tank,
Installation is possible at any angular pitch, limited to 0° pitch. Moreover, the dimensions of the wave force receiving part 6b do not necessarily have to be the same width and length Ll-, and can of course be installed at an appropriate length. Note that if the width and length of the wave force receiving portion 61) are configured to have the same dimension L1, as shown in FIG. It can be placed without creating wasted space.

(g) 1 As described above, according to the present invention, in the vibration damping device w5 having the tank 6 and storing the liquid 7 in such a manner that the tank 6 has an open liquid surface 7a, the tank A common reservoir 6c is provided in the center, and four or more wave force receivers 6b are provided around the common reservoir 6c so as to face each other. It is possible to attenuate horizontal vibrations in different directions such as the C and D directions, and the common storage section 6c can be shared by two or more sets of wave force receiving sections 61) facing each other. As shown in FIG. 2, the installation space can be reduced compared to the case where two individual vibration damping devices 221 are installed.

[Brief explanation of drawings]

FIG. 1 is a plan view showing one embodiment of the vibration damping device according to the present invention, FIG. 2 is a plan view showing an example of the installation mode of the vibration damping device shown in FIG. 1, and FIG. It is a top view showing an example of the installation mode. ...Vibration damping device...tank, wave force receiver common reservoir, liquid...liquid level 6 b, 6 c... 7... a

Claims (1)

[Scope of Claims] A vibration damping device having a tank and storing liquid with an open liquid level inside the tank, wherein a common storage part is provided in the center of the tank, and four parts are arranged around the common storage part. A vibration damping device consisting of two or more wave force receiving sections facing each other.