JPH02296975A - Vibro-isolating device - Google Patents

Abstract

PURPOSE:To enhance the effect by hanging down a vibrator in a pendulum state from a hanging frame through a handing member, further hanging the hanging frame in a pendulum state from a hanging frame through a hanging member, linking a pendulum of n-fold and proving a vibratory exciter between the individual hanging frames. CONSTITUTION:A vibrator 1 is suspended from the first hanging frame 2 by hanging members 5, and the hanging frame 2 is suspended from the second hanging frame 3 by the hanging members 5, further the hanging frame 3 is suspended from a structure 4 by the hanging members 5. And respective sets consisting of there vibratory exciters 6, whose both ends are supported by pins 7, are mounted in longitudinal and lateral directions respectively between the vibrator 1 and the hanging frame 2, between the hanging frame 2 and the hanging frame 3 and between the hanging frame 3 and the structure 4. For instance, when a 30cm extension command in the longitudinal direction is output to the vibratory exciter 6, the vibrator 1 is displaced by 90cm in the longitudinal direction in relation to the structure 4, and several fines displacement is generated even with a short stroke. Accordingly, a large vibration effect can be generated.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applied to the allocation of tower structures, high-rise buildings, etc.
For example, it relates to vibration damping devices such as active mass dampers and semi-active dampers.

[Prior Art] Conventionally, an active mass damper applied to the distribution of tower structures, high-rise buildings, etc. has been constructed as shown in FIG. In FIG. 3, 1 is a vibration body ff1 for suppressing vibration of the structure 4. In FIG. Further, 6 is a vibrator for moving the mass, and is controlled by a host computer 8.

A vibration sensor 9 is attached to the structure 4 and detects the vibration of the structure 4. The vibration of the structure 4 detected by the vibration sensor 9 is output to the host computer 8. By the way, the above mass l is caused by the rail 12 due to the wheels 11.
The vibration exciter 6 is movably suspended above the structure 4.
One end is fixed to a reaction wall 12 fixed to.

In other words, the conventional active mass damper uses vibration sensor 9
When the vibration of the structure 4 is detected, the host computer 8 controls the vibration exciter 6 to move the mass 1 to the rail 1.
0 to suppress the vibration of the structure 4.

[Problems to be Solved by the Invention] However, the conventional active mass damper has a problem in that, since the mass m1 moves on the rail 10, the damping effect is produced only in one direction, the direction in which the rail 10 is laid. be. Furthermore, in order to produce the distribution effect in two horizontal directions, it was necessary to control the masses of the two bodies placed on the rail so that they were perpendicular to each other.

Furthermore, in order to obtain a large vibration damping effect, it is necessary to move the mass 1 with a large displacement, but in this case there is a problem that a vibrator with a large stroke is required.

The present invention has been made in view of the above points, and its purpose is to provide a vibration damping device that can produce a large vibration damping effect in all directions with one mass.

[Means for solving the problem] A vibrating body for suppressing vibration of a structure, a plurality of n-th hanging members that support this vibrating body, and the plurality of n-th hanging members are suspended. An nth hanging frame, a plurality of (n+1.)th hanging members supporting the nth hanging frame, and an (n+1)th hanging member from which the plurality of (n+1)th hanging members are suspended.
a hanging frame, a (n+2)th hanging member for suspending this (n+1)th hanging frame from the structure, a space between the vibrating body and the nth hanging frame, and a space between the nth hanging frame and the nth hanging frame. The above (n+
This is a vibration damping device including a vibration exciter provided between the suspension frame 1) and between the (n+1)th suspension frame and the structure.

[Function] One mass is hung in a pendulum shape from a hanging frame via a hanging material, and the hanging frame is further suspended from the hanging frame in a pendulum shape via a hanging material, so that the pendulum is hung n times. Vibrators are installed between the individual hanging frames, and even if the stroke of each vibrator is small, it is possible to give a large displacement to the mass.

[Example] Hereinafter, a vibration damping device according to an example of the present invention will be described with reference to the drawings. In Fig. 1, 1 is the vibrating body (mass), 2 is the first hanging frame, 3 is the second hanging frame, 4 is the structure, 5 is the hanging material, 6 is the vibrator, and 7 is the pin support. It is.

That is, the vibrating body 1 is suspended from the first hanging frame 2 by the hanging members 5. This first hanging frame 2 is suspended from a second hanging frame 3 by a hanging member 5. Furthermore, this second hanging frame 3 is suspended from the structure 4 by hanging members 5.

In addition, both ends are supported by pin supports 7 between the vibrating body 1 and the first hanging frame 2, between the first hanging frame 2 and the second hanging frame 3, and between the second hanging frame 3 and the structure 4. Three vibration exciters 6 are installed in the front-rear direction and three in the left-right direction. The vibrator 6 is hydraulically or electrically driven, and is controlled by a computer (not shown). In addition, the vibration exciter 6 in the front-back direction and the vibration exciter 6 in the left-right direction
Different commands are issued from the computer, but the same command is output to each exciter facing the same direction.

Next, the operation will be explained. For example, when a command to extend 30 cm is output to each vibrator 6 in the longitudinal direction, the vibrating body 1 is displaced by 90c11 in the longitudinal direction with respect to the structure 4. Therefore, the vibration exciter 6 with a short stroke can give many times the displacement to the vibrating body 1. In addition, when another command is output from the computer to the vibration exciter 6 in the horizontal direction at the same time as in the longitudinal direction, the vibrating body 1 is displaced in the horizontal direction many times the stroke given to the vibration exciter 6. is given. In addition, since the vibration exciter 6 is supported at both ends by the pin support 7, even if a command is output to the longitudinal vibration exciter 6 and the horizontal vibration exciter 7 at the same time, the The vibrating body 1 is moved.

Next, FIGS. 2(A) and 2(B) show another embodiment of the present invention. In other embodiments, between the vibrating body 1 and the first hanging frame 2, between the first hanging frame 2 and the second hanging frame 3, and between the second hanging frame 2 and the second hanging frame 3,
This is applied when the gap between the hanging frame 3 and the structure 4 is much smaller than that in the embodiment shown in FIG. That is, except that the vibration exciter 6 is installed horizontally, its configuration and operation are the same as in the embodiment shown in FIG.

In addition, in the above embodiment, two hanging frames were provided, or two hanging frames were provided.
The present invention is not limited to this, and n hanging frames may be provided to apply a displacement (n+1) times the stroke of the vibration exciter 6 to the vibrating body 1.

[Effects of the Invention] As detailed above, according to the present invention, a vibrating machine that is operated under automatic control is provided between the multiple suspended vibrating bodies and the hanging frame, so that the speed of the vibrating machine can be reduced.・Even when the loaf is short, the vibrating body can be vibrated greatly and a large distribution effect can be produced. In addition, since the vibrating body is suspended vertically, one vibrating body can produce a damping effect in all horizontal directions.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the structure of a vibration damping device according to an embodiment of the present invention, FIG. Hanging material, 6... Vibrator.

Claims (1)

[Claims] a vibrating body for suppressing vibrations of a structure; a plurality of nth hanging members supporting the vibrating body; an nth hanging frame from which the plurality of nth hanging members are suspended; a plurality of (n+1)th hanging members supporting the hanging frame;
the (n+1)th hanging frame from which the (n+1) hanging material is suspended; the (n+2)th hanging material from which the (n+1)th hanging frame is suspended from the structure; the vibrating body; A vibration exciter is provided between the suspension frame, between the nth suspension frame and the (n+1)th suspension frame, and between the (n+1)th suspension frame and the structure. A vibration damping device characterized by: