JP2001132793A - Active-type dynamic vibration damper for building structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify structure and to improve durability and operation stability, in an active type dynamic vibration damper to provide active vibration damping effect by exerting an excitation force in a horizontal direction. SOLUTION: In order to apply an excitation force on a body mass member 18 constituting a passive vibration system 12 for a building structure, first and second mounting members 28 and 30 are intercoupled elastically through a coupling rubber elastic body 32 and an excitation force by an electromagnetic force or the like is exerted between the two mounting members 28 and 30. An active-type vibration damper which is thus formed specified structure is employed. This constitution constitutes a dynamic vibration system 14 to exert an excitation force on the passive vibration system 12 and simplifies the structure of an active vibration damper 10 which is a purpose and advantageously achieves improvement of durability and stability of operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dynamic vibration absorber for a building structure, which forms a sub-vibration system for a building structure such as a house and can exert a vibration damping effect on a building structure serving as a main vibration system. Involved
In particular, the present invention relates to an active dynamic vibration absorber for a building structure in which a vibration member for exerting a horizontal vibration force on a mass member is provided to exert an active vibration damping effect.

[0002]

2. Description of the Related Art In a building such as a general house or an office, horizontal vibration may be generated by an external force such as traffic vibration acting as an exciting force. In particular, in recent years,
Even in general houses, the number of two-story and three-story buildings is increasing due to wooden structures and lightweight steel structures.In these houses, the vibrations on the second and third floors are likely to increase due to the structure. Micro vibration has become a problem, for example, as a cause of unpleasant vibration and unpleasant noise when sleeping or working.

[0003] By the way, as a vibration damping device for a building structure, several devices for reducing the shaking of a high-rise building such as a high-rise building or a tower have been proposed. Japanese Patent Application Laid-Open Publication No. H11-157, discloses a passive (passive) dynamic vibration absorber constituted by elastically supporting a main body mass member of a building structure via a rubber mount. However, in such a passive type dynamic vibration absorber, it may be difficult to obtain a sufficient vibration damping effect with respect to a specific vibration to be damped. Therefore, a vibrating means for exerting a horizontal vibrating force on the main body mass member constituting the passive type dynamic vibration absorber is provided,
There has been proposed an active dynamic vibration absorber in which an exciting force exerted on a main body mass member by the exciting means is controlled in accordance with vibration to be damped to obtain an active damping effect. I have. For example, those described in JP-A-2-300478 and JP-A-9-41714 are such.

However, in the active dynamic vibration absorbers having the conventional structure described in the above-mentioned publications and the like, all of them are movably supported on the main body mass member via a sliding mechanism such as a linear bearing. The additional mass member is configured to be relatively displaced by a ball screw mechanism driven by an electric motor, so that the sliding mechanism and the ball screw mechanism are liable to malfunction or damage due to wear. was there. In particular, when the operation frequency is low, such as vibration suppression in high-rise buildings during earthquakes, this is not a serious problem.However, when the system is operated almost constantly, such as vibration suppression of traffic, fatigue and wear of the sliding mechanism and ball screw mechanism will occur. Is liable to be a very big problem.

Further, in an active dynamic vibration absorber having a conventional structure in which an additional mass member is displaced by a ball screw mechanism or the like driven by an electric motor, it is extremely difficult to vibrate the additional mass member at a high frequency. Although it is effective for vibration suppression of low-frequency vibrations of several Hz or less, such as vibration suppression of high-rise buildings, in small buildings such as ordinary houses, the vibration frequency to be generally damped is higher. There was also a problem that it was difficult to obtain an effective damping effect.

In addition, in the conventional active dynamic vibration absorber having a conventional structure, a sliding mechanism such as a linear bearing, an electric motor,
Ball screw mechanism, etc., and many complicated parts are required, the structure is complicated, it is difficult to manufacture and install, and in addition, the size of the vibration absorber is easy to increase, for example, in small buildings, etc. There was also a problem that it was difficult to secure the installation space.

[0007]

Here, the present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a simple and compact structure for a small building such as a general house. Another object of the present invention is to provide an active dynamic vibration absorber for a building structure having a novel structure, which can be suitably adopted.

[0008]

An embodiment of the present invention which has been made to solve such a problem will be described below. In addition, each aspect described below can be adopted in any combination as much as possible. In addition, aspects and technical features of the present invention are not limited to those described below, but are described in the entire specification and drawings, or based on an inventive idea that can be understood by those skilled in the art from the descriptions. It should be understood that the

First, according to a first aspect of the present invention, a dynamic vibration absorber is constructed by elastically supporting a main body mass member via an elastic supporting member with respect to a building structure, and a horizontal vibration absorber is provided on the main body mass member. In an active dynamic vibration absorber for a building structure provided with a vibration means that exerts a vibration force in the direction, the first mounting member and the second mounting member are arranged separately from each other, and the two mounting members are separated from each other. While being elastically connected by an elastic connecting member, the first mounting member and the second mounting member are allowed to move relative to each other based on the elastic deformation of the elastic connecting member in the first mounting member and the second mounting member. Using an active damper provided with an actuator that exerts a relative displacement force between the members, the first attachment member is fixedly attached to a main mass member of the dynamic vibration absorber, and the second attachment member is attached to the second attachment member. Attached to mounting member In that a mass member fixedly,
Features.

In the active dynamic vibration absorber having such a structure according to this aspect, the main body mass member is elastically supported by the building structure via the elastic support member, so that the main body mass member and the elastic support member are provided. Constitutes one vibration system (passive vibration system) acting as a sub-vibration system for the building structure, and the first mounting member of the active vibration damper is attached to the main body mass member, so that the additional mass member One vibration system (active vibration system) that acts as a sub-vibration system for the main body mass member is constituted by the second mounting member and the elastic connection member. And in the vibration system (active vibration system) constituted by the second mounting member and the elastic connecting member, the actuator of the active vibration damper is driven so that the first mounting member and the second mounting member are connected. By applying a relative displacement force between them, it will be actively excited,
When the excitation reaction force is applied to a vibration system (passive vibration system) constituted by the main body mass member and the elastic support member, the passive vibration system is excited.

Therefore, the vibration of the active vibration system is controlled in accordance with the vibration to be damped in the building structure, and a vibration force is applied to the passive vibration system. The vibration in the object can be suppressed by canceling the vibration.

In this case, in the active dynamic vibration absorber having the structure according to the present aspect, the dynamic vibration absorber is based on the elastic deformation of the elastic connecting member connecting the first mounting member and the second mounting member.
The active vibration system is configured by using an active vibration damper having a specific structure including an actuator that exerts a relative displacement force between the two mounting members while allowing the relative displacement between the two mounting members. The additional mass member can be disposed so as to be relatively displaceable with respect to the main body mass member without requiring a complicated mechanism such as the above, and the additional mass member can be disposed without requiring a complicated mechanism such as a ball screw. Can be displaced by vibration with respect to the main body mass member, and therefore, the intended active dynamic vibration absorber can be realized with a simple and compact structure.

Further, in such an active dynamic vibration absorber, since it is not necessary to transmit a load or force by direct contact between members as in a sliding mechanism, a ball screw mechanism, etc., wear of members is reduced. Malfunctions due to damage and the like are advantageously avoided, and excellent durability and stable operability can be exhibited.

[0014] In the active dynamic vibration absorber according to this aspect, the actuator of the active vibration damper includes a relative displacement between the first mounting member and the second mounting member based on the elastic deformation of the elastic connecting member. It is sufficient that the relative displacement force is exerted between the two mounting members while allowing it. In particular, an actuator that can be operated and controlled by an electric signal is desirable from the viewpoint of easy control of the generated excitation force and the excitation frequency. Specifically, for example, an electromagnetic actuator using a coil and a permanent magnet, a magnetic actuator using a coil and a magnetic material or a permanent magnet, an actuator using a magnetostrictive element or an electrostrictive element, and the like. Is preferably adopted. As the main mass member and the additional mass member, for example, a metal material such as an iron-based or lead-based material is advantageously employed in consideration of durability, strength, and specific gravity. The additional mass member can be formed integrally with the second mounting member in the active vibration damper, thereby reducing the number of components and simplifying the structure.
Furthermore, as the elastic support member for elastically supporting the main body mass member, a metal spring, a rubber elastic body, or the like can be suitably adopted,
For example, Japanese Patent Application Laid-Open Nos. 8-338467 and 10-
As described in Japanese Patent No. 82449 or the like, a rubber mount having a large load resistance and a small horizontal rigidity provided by laminating a reinforcing plate and a rubber elastic layer can be used. As the elastic connecting member for elastically connecting the first mounting member and the second mounting member, a metal spring, a rubber elastic body, or the like is advantageously employed. Furthermore, a guide mechanism that limits the relative displacement direction of the first mounting member and the second mounting member based on the elastic deformation of the elastic connecting member can also be adopted.
As a result, the vibration characteristics in the active vibration system and the vibration damping characteristics in the active dynamic vibration absorber can be further stabilized. Further, the mounting of the active vibration damper to the main mass member is, for example, by fixing the first mounting member of the active vibration damper to the outer peripheral surface of the main mass member with a bolt or the like. It can be made to project horizontally outward from the outer peripheral surface of the main body mass member, but the specific mounting structure is not limited.

According to a second aspect of the present invention, there is provided an active dynamic vibration absorber having a structure according to the first aspect, wherein an active vibration system comprising the additional mass member and the elastic connecting member is provided. The frequency is tuned to substantially match the natural frequency of a passive vibration system composed of the main body mass member and the elastic support member. In this embodiment, a large exciting force can be applied to the passive vibration system more efficiently by utilizing the resonance action of the active vibration system. By tuning the natural frequency to be substantially the same as the vibration frequency to be damped in the building structure, it is possible to obtain an effective active vibration damping effect for the target vibration while sufficiently suppressing energy consumption such as electric power. It becomes possible.

According to a third aspect of the present invention, there is provided an active dynamic vibration absorber having a structure according to the first or second aspect, wherein the accommodating recess opened on the outer peripheral surface with respect to the main body mass member. And the active vibration damper is accommodated in the accommodation recess, and the first mounting member of the active vibration damper is attached to the inner peripheral surface of the accommodation recess. Is the feature. According to this aspect, the protruding amount of the active vibration damper outward from the outer peripheral surface of the main body mass member can be suppressed, and the installation space for the active dynamic vibration absorber can be easily secured. It becomes possible. In addition, although the formation position of an accommodation recess is not specifically limited, For example,
By providing an accommodation recess that opens on the upper surface at substantially the center of the main body mass member, the weight balance of the main body mass member can be advantageously secured.

According to a fourth aspect of the present invention, there is provided an active type dynamic vibration absorber having a structure according to any one of the first to third aspects, wherein A separate additional mass member formed separately is attached to the two attachment members. According to such an embodiment, by appropriately setting the separate additional mass member,
There is an advantage that the natural frequency of the active vibration system can be easily adjusted. More preferably, the separate additional mass member is detachable from the second attachment member, and the natural frequency of the active vibration system can be changed and adjusted.

According to a fifth aspect of the present invention, there is provided an active dynamic vibration absorber having a structure according to any one of the first to fourth aspects, wherein a plurality of the active vibration dampers are used, and It is characterized in that a plurality of active vibration dampers are mounted on the mass member such that relative displacement forces by the actuator are exerted in two horizontal directions orthogonal to each other. According to such an aspect, the active dynamic vibration absorber including one main mass member is effective for two horizontal vibrations orthogonal to each other, which are particularly problematic in a building structure. It is possible to exert a great damping effect. It should be noted that, by simultaneously operating the actuators in each of the active vibration dampers that exert a relative displacement force in two horizontal directions orthogonal to each other on the main body mass member, and by adjusting the generated forces of both, the plurality of actuators can be increased. It is also possible to apply various horizontal exciting forces to the main mass member as a resultant of the forces generated in the active vibration damper, thereby changing the vibration direction, which is a problem in building structures In such a case, or when a vibration damping effect is required for three or more horizontal vibrations, an effective vibration damping force can be obtained.

The specific structure of the active vibration damper employed in the present invention is not limited at all. In addition to the magnitude of the vibration to be damped and the mass of the mass member, the active dynamic vibration damper is not limited to a specific structure. It will be appropriately changed depending on various conditions such as the installation space of the vessel and the shape of the mass member. Where
According to a sixth aspect of the present invention, in the active dynamic vibration absorber having a structure according to any one of the first to fifth aspects, the first mounting member and the second The first mounting member and the second mounting member are elastically connected by a rubber elastic body while the first mounting member and the second mounting member are elastically connected by a rubber elastic body. A magnetic gap is formed by an annular groove formed by opening toward the member side, and the coil member inserted and arranged in the magnetic gap is supported by the first mounting member, so that the coil member can be formed. The first mounting member and the second mounting member are relatively displaced in the approaching / separating direction based on an electromagnetic force generated by energization. According to such an embodiment, for example, an active vibration damper or the like mounted and used on the outer peripheral surface of the main body mass member can be advantageously realized.

According to a seventh aspect of the present invention, there is provided an active dynamic vibration absorber having a structure according to any one of the first to fifth aspects, wherein a shaft member and the shaft member are provided as the active vibration damper. With the outer cylindrical member spaced apart from the shaft member, the first mounting member and the second mounting member are configured,
A permanent magnet is attached to one of the first attachment member and the second attachment member, and a coil member is attached to the other, based on an electromagnetic force generated by energizing the coil member, It is characterized by adopting a structure in which the first mounting member and the second mounting member are relatively displaced in the axial direction. According to such an embodiment,
For example, an active vibration damper or the like which is disposed and used in a storage recess formed in the main body mass member and used can also be advantageously realized. Further, in the active vibration damper having the structure according to this aspect, for example, the additional mass member fixedly provided on the second mounting member is formed in an annular shape, and both sides in the axial direction are elastic with respect to the first mounting member. The connecting member can be connected and supported, so that the additional mass member can be elastically supported more stably, and the vibration state of the additional mass member can be further stabilized, and further the vibration damping effect can be further stabilized. Can be achieved.

According to an eighth aspect of the present invention, there is provided an active type dynamic vibration absorber having a structure according to any one of the first to seventh aspects, wherein the active type vibration damper includes the first type. The mounting member and the second mounting member are elastically connected by a rubber elastic body, and a fluid sealing area is formed in which an incompressible fluid is sealed and the incompressible fluid flows when vibration is applied between the two mounting members. On the other hand, a part of the fluid-filled area is constituted by a vibrating plate, and the vibrating plate is driven to be displaced by the actuator, whereby the driving force of the actuator is applied to the first mounting via the incompressible fluid. The present invention is characterized in that a member having an effect on the member and the second mounting member is adopted. According to such an aspect, it is possible to generate a larger excitation force by utilizing the resonance action of the incompressible fluid, and while sufficiently suppressing energy consumption such as electric power in the actuator, By applying an effective exciting force to the main body mass member (passive vibration system), it is possible to obtain an effective active vibration damping effect for the intended vibration. In this embodiment, in order to obtain the excitation force more efficiently, the fluid-filled area is set so that the resonance frequency of the fluid in the fluid-filled area is substantially the same as the vibration frequency to be damped in the building structure. It is desirable to adjust the structure, the density of the incompressible fluid to be sealed, the wall spring stiffness of the fluid sealed area (corresponding to the amount of pressure change required to change by a predetermined volume), and the like.

According to a ninth aspect of the present invention, there is provided an active-type dynamic vibration absorber having a structure according to any one of the first to eighth aspects, wherein the active-type dynamic vibration absorber corresponds to vibration to be damped in the building structure. An active control device for generating a control signal for controlling the operation of the actuator in the active vibration damper based on the reference signal thus obtained is provided. In other words, by adopting such an active control device, the passive vibration system constituted by the main mass member in the active dynamic vibration absorber can be controlled to vibrate with high accuracy according to the vibration state of the building structure. As a result, it is possible to stably obtain an active vibration damping effect, and to obtain an effective vibration damping effect accurately and promptly even when the vibration state of the building structure changes. Becomes possible. In addition, as a control method by such an active control device, for example, besides performing feedback control so that the vibration in the building structure approaches zero, it is also possible to perform feedforward control based on map data or the like obtained in advance. It is.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, in order to clarify the present invention more specifically, embodiments of the present invention will be described in detail with reference to the drawings.

First, FIG. 1 and FIG. 2 show an overall schematic configuration of an active dynamic vibration absorber 10 for a general house as a first embodiment of the present invention. Such a dynamic vibration absorber 10
Is configured to include a passive vibration system 12 which itself becomes a passive vibration damper for a building structure, and an active vibration system 14 which becomes an active vibration damper for the passive vibration system 12. By applying an exciting force corresponding to the vibration to be damped in the building structure from the active vibration system 14 to the passive vibration system 12, the vibration in the building structure is offset or interfered as a whole. To be suppressed.

More specifically, the passive vibration system 12 includes a main body mass 18 as a main mass member and a plurality of rubber mounts 20 as elastic support members with respect to a structural material 16 of a general house as a building structure. It is constituted by being elastically supported. The main body mass 18 is formed of a high specific gravity material such as an iron-based metal, and has a rectangular block shape in the present embodiment. Further, the rubber mount 20 has a structure in which both side mounting brackets 22 and 24 which are spaced apart and opposed to each other are elastically connected by a rubber block 26 provided between their facing surfaces. A total of four rubber mounts 20 are arranged between the structural material 16 and the vertically opposed surfaces of the main body mass 18, and are arranged at four corners of the main mass 18. Each rubber block 26 is attached to the mounting bracket 2.
In a state where the elastic central axes extending in the opposing directions of the two and 24 extend substantially in the vertical direction, one of the mounting brackets 22 is fixed to the main body mass 18, and the other mounting bracket 24 is fixed to the structural material 16. Thus, with the four rubber mounts 20,
The main body mass 18 is elastically supported by the structural material 16.

In each of the rubber mounts 20, for example, a plurality of reinforcing plates can be embedded and fixed in the direction of the center axis of the rubber block 26, whereby the main body mass 18 in the horizontal direction can be fixed. The support strength of the main body mass 18 in the vertical direction can be advantageously secured while avoiding a significant increase in the support spring rigidity.

In the present embodiment, the rubber block 26
By adjusting the mass of the rubber mount 20 and the spring characteristics of each rubber mount 20, the resonance frequency in the horizontal direction in the passive vibration system 12 is reduced to the frequency of vibration to be damped in the building structure, for example, about 2 to 10 Hz. It is tuned to correspond to etc. Furthermore, in the passive vibration system 12, the main elastic axis extending in the vertical direction is
It is desirable that the two elastic main axes extending in the horizontal direction and passing through substantially the center of gravity are set to be orthogonal to each other on the elastic main axis extending in the vertical direction, whereby a stable vibration form is realized.

Further, the disposition position of the passive vibration system 12 is as follows:
In consideration of the vibration mode and the like of the building structure to be damped, it is desirable to attach the structural member 16 at a position where an effective damping effect is exhibited. Specifically, for example, in the case of a two- or three-story general house, it can be advantageously installed using a space above the ceiling on the top floor or a space such as a closet.

On the other hand, as shown in FIG. 3, the active vibration system 14 includes a first mounting member 28 as a first mounting member.
And a second mounting member 30 as a second mounting member are spaced apart and opposed to each other in the center axis direction, and a main rubber elastic body 32 as an elastic connecting member disposed therebetween is provided. The structure is elastically connected. The two mounting brackets 28 and 30 are brought closer to each other by an electromagnetic actuator as an actuator incorporated between the first mounting bracket 28 and the second mounting bracket 30. / Apply a relative displacement force (excitation force) in the separating direction.

The first mounting member 28 is formed by superimposing a first plate member 34 and a second plate member 36 each having a disc shape and fixing them together with fixing bolts 38. Have been. Further, in the center of the second metal plate 36, there is formed a housing recess 40 which is opened on the surface to be overlapped with the first metal plate 34, and the head is housed in the housing recess 40. The guide rod 44 is fixed by a support bolt 42 whose leg is projected outward in the axial direction. This guide rod 44
Is formed of a hard material such as a metal, extends linearly with a substantially constant cross-sectional shape, and is projected outward on the center axis of the first mounting bracket 28 in the axial direction. A stopper 46 that extends in a direction perpendicular to the axis is integrally formed with the protruding tip.

In the center of the outer surface of the second metal plate 36,
A bobbin 48 which spreads in a skirt shape outward in the axial direction is overlapped, and is fixed to the second metal plate 36 by a guide rod 44 fixed by a support bolt 42. The bobbin 48 is formed of an electrical insulating material such as a synthetic resin, and a coil 50 is wound and fixed to a cylindrical portion provided at an axially protruding tip.

Further, a bolt hole 52 is formed in the first metal plate 34 constituting the first mounting member 28 so as to extend in the central portion in the axial direction. For example, the passive vibration system 12 is formed. By screwing a stud bolt 54 implanted in the main body mass 18 into the bolt hole 52,
The first mounting bracket 28 can be fixed to the outer peripheral surface of the main body mass 18.

On the other hand, the second mounting bracket 30 is
6 and an additional mass block 58 as an additional mass member. The connection fitting 56 has an annular block shape, and is disposed so as to be radially outwardly spaced apart from the first mounting fitting 28 coaxially and offset by a predetermined amount in the axial direction. I have. The second metal plate 36 and the connecting metal member 56 constituting the first mounting member 28 are connected to the rubber elastic body 3.
The two are interconnected. That is, the main rubber elastic body 32
Has an annular plate shape or a tapered cylindrical shape as a whole, and the outer peripheral surface of the first mounting member 28 is vulcanized and bonded to the inner peripheral surface of the small diameter side end portion, The inner peripheral surface of the connection fitting 56 is vulcanized and bonded to the outer peripheral surface of the large-diameter end. The facing surfaces of the second metal plate 36 and the connecting metal member 56 connected by the main rubber elastic body 32 are:
The inclined surfaces oppose each other in the oblique axial direction.

The additional mass block 58 is formed of a ferromagnetic material such as iron and a material made of a material having a high specific gravity in the form of a circular block having a large diameter.
A guide hole 60 penetrating in the axial direction is formed, and a slide bush 62 is incorporated in the guide hole 60. Furthermore, the additional mass block 58 is formed with an annular groove 64 extending continuously in the circumferential direction at the radially intermediate portion and opening on one side in the axial direction (upper side in FIG. 1). A permanent magnet 66 is inserted into the annular groove 64 and fixed to the inner surface of the outer peripheral side wall of the annular groove 64. The permanent magnet 66 may be continuous over the entire circumference in the circumferential direction or may be discontinuous. In the permanent magnet 66, both magnetic poles are set on the inner peripheral surface side and the outer peripheral surface side, thereby forming a donut-shaped magnetic path as a whole in the additional mass block 58, An annular groove 64 is positioned on this magnetic path to form a cylindrical magnetic gap as a whole. In the present embodiment, the additional mass block 5
Further, an additional mass block 68 having a cylindrical shape for adjusting the mass is externally fitted and fixed on the outer peripheral surface of the block 8.

Then, the additional mass block 58
The first mounting member 28 is spaced apart from the first mounting member 28 on the same central axis and is opposed to the first mounting member 28.
Are fixed to each other with the connecting bolt 70, so that the first mounting bracket 28 is
Are elastically connected. That is, thereby, one vibration system is configured by the second mounting bracket 30 including the additional mass block 58 and the main rubber elastic body 32.
Particularly in the embodiment at this time, the mass of the second mounting bracket 30,
By adjusting the spring characteristics of the main rubber elastic body 32, the resonance frequency of the active vibration system 14 in the central axis direction can be adjusted to the frequency of vibration to be damped in the building structure,
For example, the tuning is performed so as to cope with traffic vibration of about 2 to 10 Hz. A guide rod 44 protruding from the first mounting bracket 28 is slidably inserted into the guide hole 60 of the additional mass block 58. With the elastic deformation of the main rubber elastic body 32, the additional mass block 58
However, with respect to the first mounting bracket 28, it can be stably displaced relatively in the approaching / separating direction on the central axis. Here, the connection fitting 5 constituting the vibration system
6, additional mass block 58 and additional mass block 68
The mass system consisting of is preferably set to about 5% of the mass of the main vibration system in order to obtain an effective excitation reaction force for the building structure which is the main vibration system, but with a mass of 1 to several%. Even with this, it is possible to obtain a sufficient excitation reaction force. Specifically, for example, in a general house, a mass effect of about 100 kg to several hundred kg can provide a sufficient effect. In addition, when a plurality of dynamic vibration absorbers 10 are employed together, the mass per mass can be set smaller.

The additional mass block 58 is provided with an annular cushion rubber 72 protruding toward the first mounting bracket 28 outside the opening of the guide hole 60.
The additional mass block 58 abuts on the first mounting member 28 side (the bottom wall of the bobbin 48) via the cushion rubber 72, so that the first mounting member 28 and the second mounting member 30
The relative displacement amount in the approach direction in the axial direction is limited in a cushioning manner. A large-diameter recess 74 is formed at the opening end of the additional mass block 58 on the outer side of the guide hole 60 (the side opposite to the first mounting bracket 28).
The stopper portion 46 of the guide rod 44 is accommodated in the large diameter recess 74. And the first mounting bracket 2
When the second mounting member 30 is relatively displaced in the direction away from the second mounting member 8, the stopper portion 4 of the guide rod 44 is
6 is in contact with the bottom surface of the large-diameter recess 74 of the additional mass block 58, so that the relative displacement between the two mounting brackets 28 and 30 is limited. A buffer rubber 76 is provided on the bottom surface of the large-diameter recess 74 so that the stopper portion 46 of the guide rod 44 abuts on the buffer.

Further, the coil 50 supported by the first mounting member 28 is inserted and arranged in the annular groove 64 of the additional mass block 58, and the inner peripheral side wall surface of the annular groove 64 and the permanent magnet 66 The annular concave groove 64 is formed so as to be axially displaceable between radially opposed surfaces of the annular concave groove 64 and the outer peripheral side wall surface. A drive current is supplied to the coil 50 from an external control device 80 through a power supply lead wire 78. When the drive current is supplied to the coil 50, the coil 50 and the additional mass are connected. Block 58
An electromagnetic force is generated during the first mounting bracket 2
8 and the second mounting bracket 30 on the central axis /
A relative displacement force in the separating direction is exerted.
In particular, by reversing the direction of the current flowing through the coil 50, the first mounting bracket 28 and the second mounting bracket 3
0, the relative displacement force exerted during the period 0 can be reversed, and by supplying an alternating current to the coil 50, the relative displacement force relative to the first mounting member 28 and the second mounting member 30 can be reduced. An exciting force is applied.

The active vibration system 14 having such a structure is fixed to the main body mass 18 of the passive vibration system 12 by screwing the first mounting member 28 as described above, for example, as shown in FIGS. As shown, on the outer peripheral surface of the main body mass 18, the first and second mounting brackets 28, 30 are mounted such that the central axes thereof extend in a substantially horizontal direction. In particular, in the present embodiment, a total of three active vibration systems 14 having the above-described structure are used, two on the outer peripheral surface extending in the long side direction of the main body mass 18, and the outer peripheral surface extending in the short side direction. One on each surface. Thereby, in each active vibration system 14, the first mounting bracket 28 and the second mounting bracket 3
The relative excitation force generated during zero is applied to the main body mass 18 in the passive vibration system 12 as two horizontal excitation forces that are substantially orthogonal to each other. In particular, in the present embodiment, any horizontal excitation force is applied to the elastic body extending in the vertical direction in the passive vibration system 12 so that the displacement of the main body mass 18 in the torsional direction in the horizontal plane is prevented as much as possible. The direction is perpendicular to the main axis.

In the dynamic vibration absorber 10 having the structure described above, the coil 50 is energized in the active vibration system 14 so that the exciting force is applied between the first fitting 28 and the second fitting 30. Is generated, the excitation reaction force is exerted on the main body mass 18 constituting the passive vibration system 12, and the passive vibration system 12
Will be displaced by excitation at the corresponding frequency. Therefore, when vibrations to be damped occur in the building structure, the passive vibration system 12 itself can act as a passive dynamic vibration absorber to exert a passive vibration damping effect. In addition, the passive vibration system 12 is vibrated by the active vibration system 14 at a frequency and a phase corresponding to the vibration to be damped in the building structure, so that the destructive or interference active damping is performed. It can also exert a vibration effect.

The control device 80 for controlling the vibration of the active vibration system 14 is based on the detection signal of the vibration sensor 82 which detects the vibration state of the building structure to be damped, and controls the vibration effectively. A drive current corresponding to the detection signal is output to the coil 50 of each active vibration system 14 so as to exert a vibration effect. For example, the magnitude of the detection signal is determined based on preset data. A drive current of a corresponding magnitude is fed-forward controlled by supplying a predetermined phase difference to the detection signal, or a vibration value of a building structure included in the detection signal as much as possible. A device that performs feedback control of the magnitude of the drive current or the like so as to make it zero can be suitably used.

Further, in this embodiment, since the plurality of active vibration systems 14 are mounted so as to apply a vibrating force to the passive vibration system 12 in horizontal directions orthogonal to each other,
By selectively vibrating the active vibration system 14 that exerts a vibration force in each direction, a vibration force in the same direction as the vibration direction of any of the active vibration systems 14 can be exerted on the passive vibration system 12. In addition, the active vibration system 1 that applies a vibration force in each direction
4 at the same time, it is possible to apply a vibration force in the resultant direction of the vibration force of each active vibration system 14 to the passive vibration system 12, whereby any horizontal direction of the building structure can be obtained. It is possible to obtain an effective vibration damping effect against vibration.

In the dynamic vibration absorber 10 as described above, as the active vibration system 14, the first mounting member 28 and the second mounting member 30 are elastically connected by the main rubber elastic body 32, and both of them are mounted. By employing a specific structure in which an exciting force is applied between the metal fittings 28 and 30 by an electromagnetic force, the active vibration system 14 can be formed without requiring a complicated mechanism such as a linear bearing or a ball screw. Therefore, it is possible to advantageously achieve simplification and compactness of the structure of the target dynamic vibration absorber 10.

In addition, the dynamic vibration absorber 10 does not have a structure for transmitting a load or a force by direct contact between members, such as a sliding mechanism and a ball screw mechanism. Operational defects due to wear, damage, etc. are advantageously avoided, and excellent durability and stable operability can be exhibited.

In the dynamic vibration absorber 10, in the active vibration system 14, the relative displacement between the first fitting 28 and the second fitting 30 is allowed based on the elastic deformation of the rubber elastic body 32. And the exciting force between the two mounting brackets 28 and 30 is directly applied by the electromagnetic force without passing through a mechanical transmission mechanism or the like. Vibration system 14
, The excitation force exerted on the passive vibration system 12 can be controlled stably up to a high frequency range.
For example, it is possible to stably obtain an active damping effect that is effective even for traffic vibrations and the like in a small building structure.

Next, FIGS. 4 and 5 show an overall schematic configuration of an active dynamic vibration absorber 90 for a general house as a second embodiment of the present invention. In the present embodiment,
Since it has a passive vibration system 12 substantially the same as the active dynamic vibration absorber 10 as the first embodiment and shows another specific structural example of the active vibration system, the first embodiment The members and parts having the same structure as those described in the first embodiment are denoted by the same reference numerals in the drawings as those in the first embodiment, and the detailed description thereof is omitted.

That is, the detailed structure of the active vibration system 92 employed in the active dynamic vibration absorber 90 of the present embodiment is shown in FIG. In such an active vibration system 92, a small-diameter cylindrical inner cylindrical metal member 94 as a first mounting member and a large-diameter cylindrical outer cylindrical metal member 96 as a second mounting member are opposed to each other while being radially separated from each other. It has a structure in which a pair of leaf springs 98, 98 as elastic connecting members disposed at both ends in the axial direction are elastically connected so as to be relatively displaceable in the axial direction.

More specifically, the inner cylindrical member 94 has a straight circular tube shape formed of a rigid material such as metal, and has a thick cylindrical shape as a whole in the central portion in the axial direction. A magnet member 99 is extrapolated and fixedly attached. The magnet member 99 is a yoke 1 made of a ferromagnetic material having an annular block shape with respect to an annular permanent magnet 100 having both magnetic poles set at both axial end surfaces.
02, 102 have a structure in which they are closely overlapped from both sides in the axial direction. And such a magnet member 99
It is extrapolated and fixed to the inner cylinder fitting 94.

On the other hand, the outer tube fitting 96 has a straight large-diameter cylindrical shape formed of a rigid material such as metal, and a coil member 104 having an air-core coil structure is provided at the center in the axial direction. It is interpolated and fixedly attached. The coil member 104 includes two coils 106, 106, which are arranged on the same central axis apart from each other in the axial direction, and both are formed of a ferromagnetic material. A plurality of substantially annular plate-shaped laminated plates 108 are superposed between the coils 106 and on both sides in the axial direction. In short, the two coils 106, 106 and the plurality of laminated plates 108 are stacked on each other in the axial direction so as to form a thick cylindrical shape having a predetermined axial length as a whole. A coil member 1 having substantially one air-core structure as a whole
04 is configured. And such a coil member 10
4 is inserted and fixed in the outer tube fitting 96.

The magnet member 99 fixed to the inner cylinder 94 and the coil member 104 fixed to the outer cylinder 96
Are radially separated and opposed to each other. The axial length of the coil member 104 is slightly larger than that of the magnet member 99, and both ends of the coil member 104 in the axial direction have annular plate-shaped stoppers projecting radially inward. Metal fittings 110, 110 are fixedly provided, and the inner peripheral edges of these stopper metal fittings 110, 110
Are spaced apart from each other in the axial direction to oppose the axial end surface of the first member. Then, the contact of the magnet member 99 with the stopper fittings 110, 110 causes the axial relative displacement of the magnet member 99 and the coil member 104, and thus the axial relative displacement of the inner cylindrical fitting 94 and the outer cylindrical fitting 96. It is being restricted. Note that a cushion rubber 112 is fixed to the inner surface of each stopper fitting 110 in the axial direction, so that the impact when the magnet member 99 abuts is reduced.

Further, both ends in the axial direction of the inner cylinder fitting 94 are provided.
Metal leaf springs 98 each having a thin annular plate shape are disposed between both ends in the axial direction of the outer cylinder fitting 96, and the inner peripheral edge of the leaf spring 98 is formed by the inner cylinder fitting. The outer and inner peripheral metal parts 94 and 96 are fixed on the same central axis by being fixed to the outer peripheral metal part 96 while being fixed to the outer peripheral metal part 96, and the elastic deformation of the leaf springs 98 and 98. On the basis of this, it is elastically connected to be relatively displaceable in the axial direction.
In addition, in these leaf springs 98, 98, the slits penetrating in the thickness direction are appropriately formed in an appropriate shape, so that the spring characteristics are adjusted.

In the present embodiment, an additional mass block 114 having a substantially cylindrical shape as a whole is externally fitted and fixed on the outer peripheral surface of the outer cylinder fitting 96, and the outer cylinder including the coil member 104 and the additional mass block 114 is fixed. The bracket 96 forms an additional mass member.

That is, in the active vibration system 92 of this embodiment, when the coils 106 of the coil member 104 are energized, the magnetic poles are formed on both sides of the coil member 104 in the axial direction. 1
Attraction and repulsion by magnetic force are exerted on the first and second yokes 102, 102, or Lorentz force is exerted on a current flowing through the coils 106, 106 arranged in a magnetic field by the magnet member 99. As a result, a relative driving force in the axial direction is exerted between the coil member 104 and the magnet member 99, and the leaf springs 98,
The relative displacement of the coil member 104 and the magnet member 99 in the axial direction is caused based on the elastic deformation of the coil member 98. Therefore, the coil 10 of the coil member 104
If the alternating current is supplied to the coil members 104,
When the magnetic poles on the upper and lower sides of the coil member change, the coil member 1
An axial exciting force is generated between the magnetic member 04 and the magnet member 99.

Therefore, as shown in FIGS. 4 and 5, the active vibration system 92 is disposed between a pair of support plates 116, 116 which are fixedly protruding from the upper surface of the main body mass 18. For example, the fixing bolt 11 inserted through the inner cylinder fitting 94
8 (see FIG. 6), the inner cylindrical fitting 94 is fixed to the supporting plates 116, 116 so that the center axis of the active vibration system 92 is in the vibration direction in which vibration is to be prevented in the building structure. When mounted on the vibration system 12, by applying the exciting force generated by the active vibration system 92 to the passive vibration system 12, the same active vibration suppression effect as in the above embodiment can be obtained. .

Also, in the dynamic vibration absorber 90 of the present embodiment, it goes without saying that various effects similar to those of the dynamic vibration absorber according to the first embodiment can be effectively exhibited.

In this embodiment, the case where a single active vibration system 92 is mounted on the passive vibration system 12 has been described. However, as in the first embodiment, a plurality of active vibration systems 9 are provided.
It is, of course, also possible to mount two.

The embodiments of the present invention have been described in detail above, but these are merely examples, and the present invention
By the specific description in these embodiments,
It is not to be construed as limiting.

For example, when a plurality of active vibration systems are mounted, different frequency tunings can be performed on each of the active vibration systems, and when the vibration frequency to be damped in the building structure changes. In addition, it is also effective to selectively use an active vibration system that has been subjected to frequency tuning corresponding thereto.

In each of the above embodiments, the active vibration system 14 and the active vibration system 14 are disposed on the outer surface of the main body mass 18 of the passive vibration system 12.
92 was protruded and mounted, for example, as shown in FIGS.
As shown in FIG. 2, a housing recess 120 is formed on the outer peripheral surface of the main body mass 18, and the housing recess 1 is formed.
The active vibration systems 14 and 92 may be accommodated and arranged in the inside 20.

Further, in the first embodiment,
It is also possible to dispose the active vibration system 14 at opposite positions on both sides of the main body mass 18, whereby a plurality of active vibration systems 14 that apply a vibrating force in the same direction can be more efficiently provided. Can be installed.

In addition, the present invention provides an active type for various small to large building structures such as multi-family houses, offices, warehouses, buildings, towers, etc., in addition to single-story or two-story general houses. It goes without saying that any of them can be applied as a dynamic vibration absorber.

In addition, although not enumerated one by one, the present invention
Based on the knowledge of those skilled in the art, various changes, modifications, improvements, and the like can be made, and unless such embodiments depart from the spirit of the present invention.
Both are included in the scope of the present invention,
Needless to say.

[0062]

As is apparent from the above description, in the active type dynamic vibration absorber having the structure according to the present invention, the active vibration system which applies an exciting force to the main body mass member constituting the passive vibration system. By using an active vibration damper with a specific structure, the active vibration system could be constructed without the need for complicated mechanisms such as linear bearings and ball screws. Simplification and compactness can be achieved to a high degree, and durability and operational stability can be dramatically improved.

[Brief description of the drawings]

FIG. 1 is a front view showing a dynamic vibration absorber as a first embodiment of the present invention.

FIG. 2 is a plan view of the dynamic vibration absorber illustrated in FIG.

FIG. 3 is an enlarged longitudinal sectional view showing an active vibration system constituting the dynamic vibration absorber shown in FIG. 1;

FIG. 4 is a front view showing a dynamic vibration absorber as a second embodiment of the present invention.

FIG. 5 is a plan view of the dynamic vibration absorber illustrated in FIG. 4;

6 is an enlarged longitudinal sectional view showing an active vibration system constituting the dynamic vibration absorber shown in FIG.

FIG. 7 is a front view showing a dynamic vibration absorber as another embodiment of the present invention.

FIG. 8 is a front view showing a dynamic vibration absorber as still another embodiment of the present invention.

[Explanation of symbols]

 10, 90 Dynamic vibration absorber 12 Passive vibration system 14, 92 Active vibration system 18 Body mass 20 Rubber mount 28 First mounting bracket 30 Second mounting bracket 32 Main body rubber elastic body 50 Coil 58 Additional mass block 66 Permanent magnet 68 Additional mass block 94 Inner cylinder fitting 96 Outer cylinder fitting 98 Leaf spring 99 Magnet member 104 Coil member 114 Additional mass block

Claims (9)

[Claims] 1. A dynamic vibration absorber is formed by elastically supporting a main body mass member of a building structure via an elastic support member, and a vibration applying a horizontal exciting force to the main body mass member. In the active dynamic vibration absorber for a building structure provided with the means, the first mounting member and the second mounting member are spaced apart from each other, and the two mounting members are elastically connected by the elastic connecting member, A relative displacement force is exerted between the first mounting member and the second mounting member while allowing relative displacement based on the elastic deformation of the elastic connecting member in the first mounting member and the second mounting member. Using an active damper provided with an actuator, the first attachment member is fixedly attached to the main mass member of the dynamic vibration absorber, and an additional mass member is attached to the second attachment member. Fixedly provided Active dynamic vibration absorber for a building structure, wherein the door. 2. The natural frequency of an active vibration system composed of the additional mass member and the elastic connection member is set to be different from the natural frequency of a passive vibration system composed of the main body mass member and the elastic support member. The active dynamic vibration absorber according to claim 1, tuned to substantially match. 3. The active mass damper according to claim 1, wherein the main body mass member is formed with a housing recess opening on an outer peripheral surface, and the active recess is housed and arranged in the housing recess. The active dynamic vibration absorber according to claim 1, wherein the first mounting member is mounted on an inner peripheral surface of the housing recess. 4. The active dynamic damper according to claim 1, wherein a separate additional mass member formed separately from the second mounting member is attached to the active vibration damper. Vibration absorber. 5. A plurality of said active vibration dampers, said plurality of active vibration dampers being applied to said main body mass member such that relative displacement forces by actuators are exerted in two horizontal directions orthogonal to each other. 5. The method according to claim 1, wherein
An active dynamic vibration absorber according to any one of the above. 6. The active vibration damper, wherein the first mounting member and the second mounting member are arranged facing each other with a distance in one direction, and the first mounting member and the second mounting member are connected to each other. While being elastically connected by a rubber elastic body, a magnetic gap is formed in the second mounting member by an annular groove formed by opening toward the first mounting member, and is inserted and disposed in the magnetic gap. By causing the coil member to be supported by the first mounting member, the first mounting member and the second mounting member are moved toward and away from each other based on an electromagnetic force generated by energizing the coil member. The active dynamic vibration absorber according to any one of claims 1 to 5, wherein the active dynamic vibration absorber is relatively displaced in a direction. 7. In the active vibration damper, the first mounting member and the second mounting member are constituted by a shaft member and an outer cylinder member which is spaced apart from the shaft member. A permanent magnet is attached to one of the first attachment member and the second attachment member, and a coil member is attached to the other, based on an electromagnetic force generated by energizing the coil member, The active dynamic vibration absorber according to any one of claims 1 to 5, wherein the one mounting member and the second mounting member are relatively displaced in the axial direction. 8. In the active vibration damper, the first mounting member and the second mounting member are elastically connected by a rubber elastic body, and an incompressible fluid is sealed between the two mounting members. By forming a fluid-filled area in which the incompressible fluid is caused to flow at the time of vibration input, a part of the fluid-filled area is formed by a vibrating plate, and the vibrating plate is displaced and driven by the actuator. The active dynamic vibration absorber according to any one of claims 1 to 8, wherein the driving force of the actuator is applied to the first mounting member and the second mounting member via an incompressible fluid. 9. An active control device for generating a control signal for controlling an operation of the actuator in the active vibration damper based on a reference signal corresponding to a vibration to be damped in the building structure. Item 10. An active dynamic vibration absorber according to any one of Items 1 to 8.