JP3807169B2 - Active dynamic vibration absorbers for building structures - Google Patents

Description

[0001]
【Technical field】
The present invention relates to a dynamic vibration absorber for a building structure that constitutes a secondary vibration system for a building structure such as a house and can exhibit a damping effect on the building structure that is a main vibration system. The present invention relates to an active dynamic vibration absorber for a building structure that exerts an active vibration damping effect by providing vibration means for applying a horizontal vibration force to a mass member.
[0002]
[Background]
  In building structures such as ordinary houses and offices, horizontal vibrations may occur due to external forces such as traffic vibrations acting as excitation forces. In particular, in recent years, two-story and three-story houses are also used for ordinary houses, etc., with wooden structures and lightweight steel structures.FloorSince the number of buildings is increasing, the vibration on the second and third floors tends to increase due to the structure of those houses, etc., so there is a slight vibration caused by traffic vibration, such as unpleasant vibration or unpleasant noise at bedtime or work It has become a problem as a cause.
[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, for example, in Japanese Patent Laid-Open No. 8-338467. Discloses a passive-type dynamic vibration absorber configured by elastically supporting a main body mass member via a rubber mount with respect to a building structure. However, with such a passive type dynamic vibration absorber, it may still be difficult to obtain a sufficient damping effect with respect to a specific vibration to be damped. In view of this, a vibration means that applies a horizontal vibration force to the main body mass member constituting the passive dynamic vibration absorber is provided, and the vibration force exerted on the main mass member by the vibration means is prevented. An active dynamic vibration absorber that obtains an active damping effect by controlling according to the vibration to be vibratedProposedIt has been proposed. For example, those described in JP-A-2-3000047 and JP-A-9-41714.
[0004]
However, all of the active dynamic vibration absorbers having the conventional structures described in the above publications and the like have an additional mass supported relative to the main mass member through a sliding mechanism such as a linear bearing. Since the structure is such that the member is relatively displaced by a ball screw mechanism or the like driven by an electric motor, there has been a problem that the sliding mechanism and the ball screw mechanism are likely to cause malfunction and damage due to wear. . In particular, if the frequency of operation is low, such as vibration control during earthquakes in high-rise buildings, it will not be a big problem, but if it is operated almost constantly, such as vibration control of traffic vibration, fatigue and wear of the sliding mechanism and ball screw mechanism Tends to be a very big problem.
[0005]
In addition, 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 effective for damping low-frequency vibrations of several Hz or less, such as damping of buildings, small buildings such as ordinary houses generally have a higher vibration frequency that should be damped. There was also a problem that it was difficult to obtain a vibration effect.
[0006]
Moreover, the active dynamic vibration absorber of the conventional structure requires a lot of complex parts such as a sliding mechanism such as a linear bearing, an electric motor, and a ball screw mechanism. In addition to being difficult to install, the size of the vibration absorber is likely to increase, and for example, it is difficult to secure an installation space in a small building or the like.
[0007]
[Solution]
Here, the present invention has been made in the background as described above, and the problem to be solved is that the structure is simple and compact, and is suitably used for small buildings such as ordinary houses. It is an object to provide an active dynamic vibration absorber for a building structure having a novel structure.
[0008]
[Solution]
Hereinafter, the aspect of this invention made | formed in order to solve such a subject is described. In addition, each aspect described below can be employed in any combination as much as possible. The aspects and technical features of the present invention are not limited to those described below, but are described in the whole specification and drawings, or based on the inventive concept that can be grasped by those skilled in the art from these descriptions. It should be understood that
[0009]
  First, according to the first aspect of the present invention, a dynamic vibration absorber is configured by elastically supporting a main body mass member via an elastic support member with respect to a building structure, and a horizontal vibration is applied to the main body mass member. In an active dynamic vibration absorber for a building structure provided with a vibration means for exerting a vibration force, the first mounting member and the second mounting member are spaced apart from each other, and both the mounting members are elastically connected. Between the first mounting member and the second mounting member while allowing relative displacement based on the elastic deformation of the elastic connecting member between the first mounting member and the second mounting member. An active vibration damper with an actuator that exerts a relative displacement force onMultipleUseThe active damper on each active damperThe first mounting memberSaidWhile fixedly attached to the main body mass member,The active damper on each active damperThe additional mass member is fixed to the second mounting member.In a state where it can be freely displaced without being supported at allEstablishmentBy mounting the plurality of active vibration dampers on the main body mass member, relative displacement force by the actuator is exerted on the main body mass member in two horizontal directions orthogonal to each other.This is a feature.
[0010]
In the active dynamic vibration absorber having the 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 building structure is constituted by the main body mass member and the elastic support member. A single vibration system (passive vibration system) that acts as a secondary vibration system for an object is configured, and the first mounting member of the active vibration damper is attached to the main body mass member, thereby including an additional mass member. The second mounting member and the elastic connecting member constitute one vibration system (active vibration system) that acts as a secondary vibration system for the main body mass member. 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 to connect the first mounting member and the second mounting member. By applying a relative displacement force in between, the vibration is actively applied, and the excitation reaction force is exerted on a vibration system (passive vibration system) constituted by the main body mass member and the elastic support member. The passive vibration system is vibrated.
[0011]
Therefore, by controlling the vibration of the active vibration system according to the vibration to be damped in the building structure and applying the vibration force to the passive vibration system, the vibration in the building structure is caused by the vibration of the passive vibration system. Can be suppressed by offsetting them.
[0012]
Therefore, in the active dynamic vibration absorber having the structure according to this aspect, the relative displacement of both the mounting members based on the elastic deformation of the elastic connecting member that connects the first mounting member and the second mounting member is determined. A complex mechanism such as a linear bearing is required by configuring the active vibration system using an active vibration damper having a specific structure including an actuator that exerts a relative displacement force between both mounting members while allowing. The additional mass member can be arranged relative to the main body mass member without being displaced, and the additional mass member can be added to the main body mass member without requiring a complicated mechanism such as a ball screw. Therefore, it is possible to realize the target active dynamic vibration absorber with a simple and compact structure.
[0013]
  In addition, in such an active dynamic vibration absorber, it is not necessary to transmit a load or force by direct contact between members unlike a sliding mechanism or a ball screw mechanism. The resulting malfunction is advantageously avoided, and excellent durability and stable operability can be exhibited.
  Further, in the active dynamic vibration absorber having the structure according to the present invention, two active horizontal vibration absorbers composed of one main body mass member are particularly prone to problems in a building structure. In any case, an effective damping effect can be exerted against vibration. If the actuators in each active vibration damper that exerts relative displacement force in two horizontal directions orthogonal to the main body mass member are simultaneously operated and the generated force of both is relatively adjusted, the plurality of them can be obtained. It is also possible to apply various horizontal excitation forces to the main body mass member as the resultant force of the active vibration dampers of the active vibration damper, thereby changing the vibration direction that is a problem in building structures Even in the case where a damping effect is required for three or more horizontal vibrations, an effective damping force can be obtained.
[0014]
In the active dynamic vibration absorber according to this aspect, as an actuator of the active vibration damper, while allowing relative displacement between the first attachment member and the second attachment member based on the elastic deformation of the elastic coupling member. Any actuator can be used as long as it exerts a relative displacement force between the two mounting members. In particular, an actuator that can be controlled by an electric signal is desirable from the viewpoint of easy control of the generated excitation force, excitation frequency, etc. For example, an electromagnetic force type actuator using a coil and a permanent magnet, a magnetic type actuator using a coil and a magnetic material or a permanent magnet, an actuator using a magnetostrictive element or an electrostrictive element, etc. are suitable. Adopted. As the main mass member and the additional mass member, for example, a metal material such as iron or lead is advantageously employed in consideration of durability, strength, and specific gravity. The additional mass member can be integrally formed with the second mounting member in the active vibration damper, thereby reducing the number of parts and simplifying the structure. Further, as an elastic support member for elastically supporting the main body mass member, a metal spring, a rubber elastic body, or the like can be suitably employed, and described in, for example, Japanese Patent Laid-Open Nos. 8-338467 and 10-82449. As described above, it is possible to employ a rubber mount or the like that is provided with a large load resistance and a small horizontal rigidity by laminating a reinforcing plate and a rubber elastic layer. Moreover, a metal spring, a rubber elastic body, etc. are advantageously employ | adopted as an elastic connection member which elastically connects a 1st attachment member and a 2nd attachment member. Furthermore, a guide mechanism that restricts 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, whereby vibration characteristics in the active vibration system, As a result, further stabilization of the damping characteristics in the active dynamic vibration absorber can be achieved. Moreover, the attachment to the main body mass member of the active vibration damper is, for example, by fixing the first attachment member in the active vibration damper to the outer peripheral surface of the main body mass member with a bolt or the like. Although it can be made to project outward in the horizontal direction from the outer peripheral surface of the main body mass member, its specific mounting structure is not limited.
[0015]
According to a second aspect of the present invention, in the active dynamic vibration absorber having the structure according to the first aspect, the natural frequency of the active vibration system configured by the additional mass member and the elastic connecting member is set. The main mass member and the elastic support member are tuned so as to substantially match the natural frequency of the passive vibration system. In this aspect, the large vibration 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 approximately the same as the vibration frequency to be damped in the building structure, it is possible to obtain an effective active damping effect against the target vibration while sufficiently suppressing energy consumption such as electric power. It becomes possible.
[0016]
  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 main body mass member is formed with an accommodation recess that opens to an outer peripheral surface. In addition, the active vibration damper is accommodated in the accommodation recess, and the first mounting member in the active vibration damper is disposed in the accommodation recess.InsideIt is characterized by being attached to. According to this aspect, the amount of projection of the active vibration damper from the outer peripheral surface of the main body mass member to the outside 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, the weight balance of a main body mass member is advantageously ensured by providing the accommodation recess opened to an upper surface in the approximate center of a main body mass member. I can do it.
[0017]
According to a fourth aspect of the present invention, there is provided an active dynamic vibration absorber having a structure according to any one of the first to third aspects, wherein the second attachment is the active vibration damper. It is characterized in that a separate additional mass member formed separately from the member is attached. According to this embodiment, there is an advantage that the natural frequency of the active vibration system can be easily adjusted by appropriately setting the separate additional mass member. More preferably, the separate additional mass member is removable from the second mounting member, and the natural frequency of the active vibration system can be changed and adjusted.
[0019]
  Further, the specific structure of the active vibration damper adopted in the present invention is not limited in any way, and in addition to the magnitude of vibration to be damped and the mass of the mass member, the installation of the active dynamic vibration damper It will be appropriately changed according to various conditions such as the space and the shape of the mass member. There, the first of the present inventionFiveThe first to the second aspectsFourIn the active dynamic vibration absorber having a structure according to any one of the above, as the active vibration damper, the first mounting member and the second mounting member are arranged to face each other while being spaced apart in one direction, While the first mounting member and the second mounting member are elastically connected by a rubber elastic body, the second mounting member is magnetically formed by an annular groove formed to open toward the first mounting member side. By forming the gap and supporting the coil member inserted and arranged in the magnetic gap with the first mounting member, the first force member can be used based on the electromagnetic force generated when the coil member is energized. The mounting member and the second mounting member are structured so as to be relatively displaced in the approach / separation direction. According to this aspect, for example, an active vibration damper or the like that is used by being mounted on the outer peripheral surface of the main body mass member can be advantageously realized.
[0020]
  In addition, the first of the present inventionSixThe first to the second aspectsFourIn the active dynamic vibration absorber having a structure according to any one of the above-described aspects, the first attachment is performed as the active vibration damper by a shaft member and an outer cylindrical member spaced apart from the shaft member. A member and the second attachment member are configured, and 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 to energize the coil member. Based on the electromagnetic force generated along with this, a structure in which the first mounting member and the second mounting member are relatively displaced in the axial direction is employed. According to such an aspect, for example, an active vibration damper or the like that is used while being housed in a housing recess formed in the main body mass member can 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 annular, and both axial sides thereof are elastic with respect to the first mounting member. The connecting member can also be connected and supported, whereby 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 control effect can be further stabilized. Can be achieved.
[0021]
  In addition, the first of the present inventionSevenThe first to the second aspectsSixIn the active dynamic vibration absorber having the structure according to any one of the above, as the active vibration damper, the first mounting member and the second mounting member are elastically connected by a rubber elastic body, A compressive fluid is sealed to form a fluid sealed region in which the incompressible fluid flows when vibration is input between the two mounting members, and a part of the fluid sealed region is configured by a vibration plate, By adopting a configuration in which the driving force by the actuator is exerted on the first mounting member and the second mounting member via the incompressible fluid by driving the vibration plate with the actuator. Features. According to such an aspect, it is possible to generate a greater excitation force using the resonance action of the incompressible fluid, while sufficiently suppressing energy consumption such as electric power in the actuator, By applying an effective excitation force to the main body mass member (passive vibration system), it is possible to obtain an effective active damping effect for the target vibration. In addition, in this aspect, in order to obtain the excitation force more efficiently, the fluid sealing region is set so that the resonance frequency of the fluid in the fluid sealing region is substantially the same as the vibration frequency to be vibration-isolated in the building structure. It is desirable to adjust the structure, the density of the incompressible fluid to be sealed, the wall spring rigidity (corresponding to the amount of pressure change required to change by a predetermined volume), and the like.
[0022]
  In addition, the first of the present inventionEightThe first to the second aspectsSevenIn the active dynamic vibration absorber having the structure according to any one of the above aspects, the operation of the actuator in the active vibration damper is controlled based on a reference signal corresponding to the vibration to be isolated in the building structure The present invention is characterized in that an active control device for generating a control signal is provided. In other words, by adopting such an active control device, the passive vibration system composed of the main body mass member in the active dynamic vibration absorber can be vibrated and controlled with high accuracy according to the vibration state of the building structure. Therefore, an active damping effect can be obtained stably, and even when the vibration state of a building structure changes, an effective damping effect can be obtained by responding to it with high accuracy and speed. Is possible. As a control method using such an active control device, for example, feedback control is performed so that vibration in a building structure approaches zero, and control can be performed in a feedforward manner based on map data obtained in advance. It is.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
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.
[0024]
First, FIG.1 and FIG.2 shows the whole schematic structure of the active type dynamic vibration absorber 10 for general houses as 1st embodiment of this invention. The dynamic vibration absorber 10 includes a passive vibration system 12 that itself becomes a passive vibration damper for a building structure, and an active vibration system 14 that becomes an active vibration damper for the passive vibration system 12. ing. Then, by applying an excitation 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 as a whole can be canceled or interfered. It is supposed to be suppressed.
[0025]
More specifically, in the passive vibration system 12, a main body mass 18 as a main body mass member is elastically supported by a plurality of rubber mounts 20 as elastic support members with respect to a general housing structure material 16 as a building structure. Is made up of. 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 arranged opposite to each other are elastically connected by a rubber block 26 disposed between the opposing surfaces. A total of four rubber mounts 20 are disposed between the vertically facing surfaces of the structural member 16 and the main body mass 18 and are disposed at the four corners of the main body mass 18. Each rubber block 26 has one mounting bracket 22 fixed to the main body mass 18 with the elastic central axis extending in the direction opposite to the mounting brackets 22, 24 extending in the substantially vertical direction, and the other mounting bracket 24. Is fixed to the structural member 16, and the main body mass 18 is elastically supported by the four rubber mounts 20 with respect to the structural member 16.
[0026]
In each rubber mount 20, for example, a plurality of reinforcing plates can be embedded and fixed separately in the central axis direction of the rubber block 26, whereby the horizontal support spring rigidity of the main body mass 18 can be increased. It is possible to advantageously secure the supporting strength of the main body mass 18 in the vertical direction while avoiding a significant increase in the vertical direction.
[0027]
Further, in the present embodiment, by adjusting the mass of the rubber block 26 and the spring characteristics of each rubber mount 20, the horizontal resonance frequency in the passive vibration system 12 is the vibration to be damped in the building structure. It is tuned to cope with a frequency, for example, a traffic vibration of about 2 to 10 Hz. Furthermore, in the passive vibration system 12, the elastic main shaft extending in the vertical direction passes through the approximate center of gravity of the main body mass 18, and the two elastic main shafts extending in the horizontal direction are orthogonal to each other on the elastic main shaft extending in the vertical direction. It is desirable to set, thereby realizing a stable vibration form.
[0028]
Furthermore, it is desirable that the passive vibration system 12 is disposed on the structural member 16 at a position where an effective vibration damping effect is exhibited in consideration of the vibration mode of the building structure to be vibrated. Specifically, for example, in the case of a 2-3-story general house, etc., it can be advantageously installed using the space behind the ceiling on the top floor or a space such as a closet.
[0029]
  On the other hand, the active vibration system 14 is shown in FIG.RuAs described above, the first mounting bracket 28 as the first mounting member and the second mounting bracket 30 as the second mounting member are disposed to face each other while being spaced apart from each other in the central axis direction. It is set as the structure elastically connected by the main body rubber elastic body 32 as an elastic connection member arrange | positioned in this. Then, both mounting brackets 28 and 30 are brought close to each other with respect to both mounting brackets 28 and 30 by an electromagnetic actuator as an actuator incorporated between the first mounting bracket 28 and the second mounting bracket 30. / Relative displacement force (excitation force) in the separating direction is applied.
[0030]
In this case, the first mounting bracket 28 is formed by superimposing a first plate bracket 34 and a second plate bracket 36 each having a disk shape and fixing them together with fixing bolts 38. . An accommodation recess 40 is formed in the central portion of the second metal plate 36 so as to open to the surface overlapped with the first metal plate 34, and the head is accommodated in the accommodation recess 40. A guide rod 44 is fixed by a support bolt 42 having a leg protruding outward in the axial direction. The guide rod 44 is formed of a hard material such as metal and extends linearly with a substantially constant cross-sectional shape. The guide rod 44 protrudes outward in the axial direction on the central axis of the first mounting bracket 28. In addition, a stopper 46 that extends in the direction perpendicular to the axis is integrally formed at the protruding tip.
[0031]
Further, a bobbin 48 spreading in a skirt shape in the axially outward direction is overlapped at the center of the outer surface of the second plate metal 36, and the second plate metal is fixed by a guide rod 44 fixed by a support bolt 42. 36 is fixed. 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 a protruding end portion in the axial direction.
[0032]
Further, a bolt hole 52 extending in the central portion in the axial direction is formed in the first plate fitting 34 constituting the first mounting fitting 28, for example, the main body mass 18 constituting the passive vibration system 12. The first mounting bracket 28 can be fixed to the outer peripheral surface of the main body mass 18 by screwing the stud bolts 54 implanted in the bolt holes 52 into the bolt holes 52.
[0033]
On the other hand, the second mounting bracket 30 includes a connecting bracket 56 and an additional mass block 58 as an additional mass member. The connecting metal piece 56 has an annular block shape, and is arranged radially outwardly away from the first attachment metal 28 and coaxially and offset by a predetermined amount in the axial direction. Yes. The second plate metal 36 and the connecting metal 56 constituting the first mounting metal 28 are connected to each other by the main rubber elastic body 32. 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 bracket 28 is added to the inner peripheral surface of the end portion on the small diameter side. While being vulcanized, the inner peripheral surface of the connection fitting 56 is vulcanized and bonded to the outer peripheral surface of the end portion on the large diameter side. The opposing surfaces of the second metal plate 36 and the connecting metal member 56 connected by the main rubber elastic body 32 are inclined surfaces that face each other in the oblique axis direction.
[0034]
The additional mass block 58 is formed of a ferromagnetic material such as iron and a material having a high specific gravity, and has a large-diameter circular block shape, and a guide hole 60 penetrating in the axial direction on the central axis. Is formed, and a sliding bush 62 is incorporated in the guide hole 60. Further, the additional mass block 58 is formed with an annular concave groove 64 that continuously extends in the circumferential direction in the radial direction and opens to 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. The permanent magnet 66 is provided with both magnetic poles on the inner peripheral surface side and the outer peripheral surface side, whereby a donut-shaped magnetic path is formed as a whole in the additional mass block 58, and An annular groove 64 is positioned on this magnetic path to form a cylindrical magnetic gap as a whole. In the present embodiment, a cylindrical additional mass block 68 for mass adjustment is further fitted and fixed on the outer peripheral surface of the additional mass block 58.
[0035]
The additional mass block 58 is disposed opposite to the first mounting bracket 28 so as to be spaced apart on the same central axis, and is overlapped with the coupling bracket 56 and fixed by the coupling bolt 70 on the opposed surface. Accordingly, the first mounting bracket 28 is elastically connected via the main rubber elastic body 32. That is, by this, one vibration system is constituted by the second mounting bracket 30 including the additional mass block 58 and the main rubber elastic body 32. In particular, in the present embodiment, the second mounting bracket 30 By adjusting the mass and the spring characteristics of the main rubber elastic body 32, the resonance frequency in the central axis direction of the active vibration system 14 is a vibration frequency to be damped in the building structure, for example, about 2 to 10 Hz. It is tuned to handle vibrations. In addition, 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, and therefore, based on the guide action by the guide rod 44. As the main rubber elastic body 32 is elastically deformed, the additional mass block 58 is stably displaced relative to the first mounting bracket 28 in the approach / separation direction on the central axis. Here, the mass system composed of the connecting metal fitting 56, the additional mass block 58 and the additional mass block 68 constituting the vibration system is preferably used in order to obtain an effective excitation reaction force against the building structure as the main vibration system. Although it is set to a mass of about 5% of the main vibration system, it is possible to obtain a sufficient excitation reaction force even with a mass of 1 to several percent. Specifically, for example, in a general house A mass system mass of about 100 kg to several hundred kg can obtain a sufficient effect, and when a plurality of dynamic vibration absorbers 10 are used together, the mass system mass per unit is made smaller. It can be set.
[0036]
The additional mass block 58 is fixedly provided with an annular buffer rubber 72 projecting toward the first mounting bracket 28 outside the opening of the guide hole 60. Thus, the additional mass block 58 abuts on the first mounting bracket 28 side (bottom wall portion of the bobbin 48), so that the first mounting bracket 28 and the second mounting bracket 30 are relatively close to each other in the axial direction. The amount of displacement is limited in a buffering manner. A large-diameter recess 74 is formed at the open end of the additional mass block 58 on the outer side of the guide hole 60 (opposite to the first mounting bracket 28). Further, the stopper portion 46 of the guide rod 44 is accommodated. When the second mounting bracket 30 is greatly displaced in the separating direction relative to the first mounting bracket 28, the stopper portion 46 of the guide rod 44 is placed on the bottom surface of the large-diameter recess 74 of the additional mass block 58. By abutting, the relative displacement amount of both the 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 comes into contact with the buffer.
[0037]
Further, the coil 50 supported by the first mounting bracket 28 is inserted and disposed in the annular groove 64 of the additional mass block 58, and is constituted by an inner peripheral side wall surface of the annular groove 64 and a permanent magnet 66. The annular concave groove 64 is disposed so as to be displaceable in the axial direction between the radially opposing surfaces with the outer peripheral side wall surface. The coil 50 is supplied with a drive current 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. An electromagnetic force is generated between the blocks 58 so that a relative displacement force in the approach / separation direction on the central axis is exerted on the first mounting bracket 28 and the second mounting bracket 30. It has become. In particular, the relative displacement force exerted between the first mounting bracket 28 and the second mounting bracket 30 can be reversed by reversing the direction of the current applied to the coil 50. By applying an alternating current to the coil 50, a relative excitation force is exerted on the first mounting bracket 28 and the second mounting bracket 30.
[0038]
The active vibration system 14 having such a structure is shown in FIGS. 1 and 2 by screwing the first mounting bracket 28 to the main body mass 18 of the passive vibration system 12 as described above. As shown, the central axes of the first and second mounting brackets 28 and 30 are mounted on the outer peripheral surface of the main body mass 18 so as to 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 periphery extending in the short side direction. Each one is mounted on the surface. As a result, the relative excitation force generated between the first mounting bracket 28 and the second mounting bracket 30 in each active vibration system 14 is substantially equal to the main body mass 18 in the passive vibration system 12. It is exerted as two horizontal excitation forces orthogonal to each other. In particular, in the present embodiment, any horizontal excitation force causes elasticity extending in the vertical direction in the passive vibration system 12 so that displacement in the torsional direction in the horizontal plane of the main body mass 18 is prevented as much as possible. It extends in the direction perpendicular to the main axis.
[0039]
In the dynamic vibration absorber 10 having the structure as described above, the coil 50 is energized in the active vibration system 14 to generate an excitation force between the first mounting bracket 28 and the second mounting bracket 30. Then, the excitation reaction force is exerted on the main body mass 18 constituting the passive vibration system 12, and the passive vibration system 12 is displaced by vibration at a corresponding frequency. Therefore, when vibration to be damped is generated in the building structure, the passive vibration system 12 can act as a passive dynamic vibration absorber by itself and exhibit 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. The vibration effect can also be exhibited.
[0040]
The control device 80 for controlling the vibration of the active vibration system 14 has an effective damping effect on the vibration based on the detection signal of the vibration sensor 82 that detects the vibration state of the building structure to be vibration-isolated. A drive current corresponding to the detection signal is output to the coil 50 of each active vibration system 14 so that the detection signal can be exhibited. For example, a magnitude corresponding to the magnitude of the detection signal based on preset data. The drive current is controlled in a feed-forward manner by feeding the detection signal with a predetermined phase difference, or the vibration value of the building structure included in the detection signal is made as zero as possible. Thus, a device that feedback-controls the magnitude of the drive current or the like can be suitably employed.
[0041]
Further, in the present embodiment, since the plurality of active vibration systems 14 are mounted in a state in which an excitation force is exerted in the horizontal direction perpendicular to the passive vibration system 12, the excitation force is applied in each direction. In addition to being able to apply an excitation force in the same direction as the excitation direction of any of the active vibration systems 14 to the passive vibration system 12 by selectively exciting the active vibration system 14 to be exerted, each direction By simultaneously oscillating the active vibration system 14 that exerts a vibration force on the active vibration system 14, it is possible to exert a vibration force in the resultant direction of the vibration force of each active vibration system 14 on the passive vibration system 12. It is possible to obtain an effective damping effect against arbitrary horizontal vibrations in the building structure.
[0042]
In the dynamic vibration absorber 10 as described above, as the active vibration system 14, the first mounting bracket 28 and the second mounting bracket 30 are elastically connected by the main rubber elastic body 32, and both the mounting bracket 28, By adopting a specific structure that exerts an excitation force by electromagnetic force between 30, such an active vibration system 14 can be configured without requiring a complicated mechanism such as a linear bearing or a ball screw. Therefore, simplification and compactness of the structure of the target dynamic vibration absorber 10 can be advantageously achieved.
[0043]
In addition, such a dynamic vibration absorber 10 does not have a structure for transmitting a load or force by direct contact between members, such as a sliding mechanism or a ball screw mechanism, so The malfunction due to damage or the like is advantageously avoided, and excellent durability and stable operability can be exhibited.
[0044]
Further, in the dynamic vibration absorber 10, in the active vibration system 14, relative displacement between the first mounting bracket 28 and the second mounting bracket 30 is allowed based on elastic deformation of the main rubber elastic body 32. In addition, since the exciting force between the mounting brackets 28 and 30 is directly exerted by electromagnetic force without using a mechanical transmission mechanism or the like, the active vibration system 14 Thus, the excitation force exerted on the passive vibration system 12 can be stably controlled up to a high frequency range. Therefore, for example, active control effective for traffic vibration in a small building structure is effective. The vibration effect can be obtained stably.
[0045]
Next, FIG. 4 and FIG. 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, the passive vibration system 12 that is substantially the same as the active dynamic vibration absorber 10 as the first embodiment is provided, and another specific structural example of the active vibration system is shown. Accordingly, members and parts having the same structure as in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and detailed descriptions thereof are omitted.
[0046]
That is, the detailed structure of the active vibration system 92 employed in the active dynamic vibration absorber 90 of this embodiment is shown in FIG. In the active vibration system 92, a small-diameter cylindrical inner tube fitting 94 as a first attachment member and a large-diameter cylindrical outer tube fitting 96 as a second attachment member are opposed to each other in the radial direction. A pair of leaf springs 98 and 98 as elastic connecting members respectively disposed at both axial ends are elastically connected so as to be relatively displaceable in the axial direction.
[0047]
More specifically, the inner cylinder fitting 94 has a straight circular tube shape formed of a rigid material such as metal, and a magnet member 99 having a thick cylindrical shape as a whole at the central portion in the axial direction. Is extrapolated and fixedly attached. This magnet member 99 has yokes 102 and 102 made of a ferromagnetic material each having an annular block shape from both sides in the axial direction, with respect to the annular permanent magnet 100 having both magnetic poles set on both axial end faces. It has a closely stacked structure. The magnet member 99 is fixed to the inner cylinder 94 by extrapolation.
[0048]
On the other hand, the outer cylinder 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 inserted in the central portion in the axial direction. Are fixedly attached. The coil member 104 includes two coils 106 and 106. The coils 106 and 106 are arranged on the same central axis so as to be separated from each other in the axial direction, and both are made of a ferromagnetic material. A plurality of substantially annular plate-shaped laminated plates 108 are overlapped between the coils 106 and 106 and on both sides in the axial direction. In short, the two coils 106 and 106 and the plurality of laminated plates 108 are stacked in the axial direction so as to form a thick cylindrical shape having a predetermined axial length as a whole. As a whole, one coil member 104 having an air-core structure is substantially constituted. The coil member 104 is inserted and fixed to the outer tubular metal fitting 96.
[0049]
Further, the magnet member 99 fixed to the inner cylinder fitting 94 and the coil member 104 fixed to the outer cylinder fitting 96 are opposed to each other in the radial direction. The coil member 104 has an axial length slightly larger than that of the magnet member 99, and an annular plate-shaped stopper projecting radially inward on both axial end surfaces of the coil member 104. The metal fittings 110 and 110 are fixed, and the inner peripheral edge portions of these stopper metal fittings 110 and 110 are opposed to the axial end face of the magnet member 99 so as to be spaced apart on both sides in the axial direction. When the magnet member 99 is brought into contact with the stopper fittings 110 and 110, the relative displacement in the axial direction between the magnet member 99 and the coil member 104, and thus the relative displacement in the axial direction between the inner tubular fitting 94 and the outer tubular fitting 96 is increased. It has come to be restricted. A buffer rubber 112 is fixed to the inner surface in the axial direction of each stopper fitting 110 so that the impact when the magnet member 99 is in contact is alleviated.
[0050]
Further, between the both axial end portions of the inner cylindrical metal fitting 94 and the both axial end portions of the outer cylindrical metal fitting 96, metal leaf springs 98 each having a thin annular plate shape are disposed. The inner peripheral edge of the leaf spring 98 is fixed to the inner cylinder fitting 94, and the outer peripheral edge is fixed to the outer cylinder fitting 96, whereby the inner and outer cylinder fittings 94, 96 are held on the same central axis. At the same time, based on the elastic deformation of the leaf springs 98, 98, they are elastically coupled so as to be relatively displaceable in the axial direction. In these leaf springs 98, 98, a spring characteristic is adjusted by appropriately forming a slit penetrating in the thickness direction with an appropriate shape.
[0051]
In the present embodiment, the 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 fitting 96 including the coil member 104 and the additional mass block 114 is used. The additional mass member is configured.
[0052]
That is, in the active vibration system 92 of the present embodiment, when the coils 106 and 106 of the coil member 104 are energized, magnetic poles are formed on both sides in the axial direction of the coil member 104, whereby the permanent magnet 100 and both sides of the magnet member 99 are formed. The yokes 102 and 102 are attracted or repelled by magnetic force, or the Lorentz force is exerted on the current flowing to the coils 106 and 106 disposed in the magnetic field by the magnet member 99. As a result, an axial relative driving force is exerted between the coil member 104 and the magnet member 99, and the coil member 104 and the magnet member 99 are based on the elastic deformation of the leaf springs 98 and 98. A relative displacement in the axial direction is generated. Therefore, if an alternating current is supplied to the coils 106 and 106 of the coil member 104, the magnetic force on the upper and lower sides of the coil member 104 changes, so that an axial excitation force is generated between the coil member 104 and the magnet member 99. It will be born.
[0053]
Accordingly, as shown in FIGS. 4 and 5, such an active vibration system 92 is disposed between a pair of support plates 116 and 116 that are fixedly provided so as to protrude from the upper surface of the main body mass 18. The fixing bolt 118 (see FIG. 6) inserted through the tubular fitting 94 is used to fix the inner tubular fitting 94 to the support plates 116, 116, and the central axis of the active vibration system 92 should be vibration-proof in the building structure. If it is attached to the passive vibration system 12 so as to be in the vibration direction, the vibration force generated in the active vibration system 92 is exerted on the passive vibration system 12, so that the same active control as in the above embodiment is performed. A vibration effect can be obtained.
[0054]
Of course, in the dynamic vibration absorber 90 of this embodiment, various effects similar to those of the dynamic vibration absorber according to the first embodiment are effectively exhibited.
[0055]
In the present embodiment, the case where the 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 92 may be mounted. Of course, it is possible.
[0056]
As mentioned above, although embodiment of this invention was explained in full detail, these are illustrations to the last, Comprising: This invention is not interpreted limited at all by the specific description in these embodiment.
[0057]
For example, when a plurality of active vibration systems are mounted, it is possible to perform different frequency tuning for each of the active vibration systems. When the vibration frequency to be isolated in the building structure changes, It is also effective to selectively use an active vibration system that has been subjected to corresponding frequency tuning.
[0058]
Moreover, in the said embodiment, although the active vibration systems 14 and 92 protruded and mounted | worn on the outer surface of the main body mass 18 of the passive vibration system 12 in any of the said embodiment, they are shown by FIG. 7 and FIG. 8, for example. As described above, in the main body mass 18, the housing recess 120 that opens to the outer peripheral surface thereof may be formed, and the active vibration systems 14 and 92 may be housed in the housing recess 120.
[0059]
Furthermore, in the first embodiment, the active vibration system 14 can be disposed so as to face both side surfaces sandwiching the main body mass 18, thereby exerting an excitation force in the same direction. A plurality of active vibration systems 14 can be mounted more efficiently.
[0060]
In addition, the present invention provides active dynamic vibration damping for various small to large building structures such as single-story and two-story general houses as well as apartment houses, offices, warehouses, buildings, and towers. Needless to say, any device can be used.
[0061]
In addition, although not enumerated one by one, the present invention can be carried out in a mode to which various changes, modifications, improvements and the like are added based on the knowledge of those skilled in the art. It goes without saying that all are included in the scope of the present invention without departing from the spirit of the present invention.
[0062]
【The invention's effect】
As is apparent from the above description, in the active dynamic vibration absorber having the structure according to the present invention, the active vibration system that exerts an excitation force on the main body mass member that constitutes the passive vibration system has a specific structure. By constructing with an active vibration damper, it was possible to construct such an active vibration system without the need for complicated mechanisms such as linear bearings and ball screws, thereby simplifying the structure and making it more compact Can be achieved at a high level, and dramatic improvements in durability and operational stability can be achieved.
[Brief description of the drawings]
FIG. 1 is a front view showing a dynamic vibration absorber according to a first embodiment of the present invention.
FIG. 2 is a plan view of the dynamic vibration absorber shown in FIG.
3 is an enlarged longitudinal sectional view showing an active vibration system constituting the dynamic vibration absorber shown in FIG. 1. FIG.
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 shown in FIG. 4;
6 is an enlarged longitudinal sectional view showing an active vibration system constituting the dynamic vibration absorber shown in FIG. 4;
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 Body rubber elastic body
50 coils
58 Additional Mass Block
66 Permanent magnet
68 Additional Mass Block
94 Inner tube bracket
96 Outer cylinder fitting
98 leaf spring
99 Magnet member
104 Coil member
114 Additional mass block

Claims (8)

A construction in which a dynamic vibration absorber is configured by elastically supporting a main body mass member via an elastic support member with respect to a building structure, and an excitation means for applying a horizontal excitation force to the main body mass member is provided. In active dynamic vibration absorbers for structures,
The first attachment member and the second attachment member are spaced apart from each other, and both the attachment members are elastically connected by an elastic connection member, and the elastic connection between the first attachment member and the second attachment member while allowing relative displacement based on the elastic deformation of the members, they first mounting member and the active vibration damper which is provided an actuator to exert a relative displacement force between the second mounting member, a plurality used, each of the the first mounting member in the active vibration damper fixedly is attached to the body mass member fixedly additional mass member relative to the second mounting member in each of said active vibration damper In addition, it is provided in a state where it can be freely displaced without being supported at all , and by attaching the plurality of active vibration dampers to the main body mass member, two orthogonal to the main body mass member are provided. In one horizontal direction Active dynamic vibration absorber for a building structure, characterized in that as the relative displacement force is exerted by the actuator.   The natural frequency of the active vibration system composed of the additional mass member and the elastic connecting member is substantially matched to the natural frequency of the 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. The main mass member is formed with a housing recess that opens to an outer peripheral surface, and the active vibration damper is housed in the housing recess so that the first attachment in the active vibration damper is performed. The active dynamic vibration absorber according to claim 1 or 2, wherein a member is attached to an inner surface of the housing recess.   4. The active dynamic vibration absorber according to claim 1, wherein a separate additional mass member formed separately from the second attachment member is attached to the active vibration damper. 5. In the active vibration damper, the first mounting member and the second mounting member are disposed to face each other while being spaced apart in one direction, and the first mounting member and the second mounting member are elasticized by a rubber elastic body. On the other hand, in the second mounting member, a magnetic gap is formed by an annular groove formed to open toward the first mounting member, and a coil member inserted and disposed in the magnetic gap is formed. By supporting the first mounting member with the first mounting member, the first mounting member and the second mounting member are relatively displaced in the approaching / separating direction based on the electromagnetic force generated when the coil member is energized. The active dynamic vibration absorber according to any one of claims 1 to 4 . In the active vibration damper, the first mounting member and the second mounting member are configured by a shaft member and an outer cylindrical member spaced apart from the shaft member. A permanent magnet is attached to one of the member and the second attachment member, and a coil member is attached to the other, and the first attachment member, based on the electromagnetic force generated by energizing the coil member, The active dynamic vibration absorber according to any one of claims 1 to 4 , wherein the second mounting member is relatively displaced in the axial direction. In the active vibration damper, the first attachment member and the second attachment member are elastically connected by a rubber elastic body, and an incompressible fluid is sealed so that the non-compressible fluid is not input when vibration is input between the two attachment members. While forming a fluid-filled region in which a compressive fluid is allowed to flow, a part of the fluid-filled region is constituted by a vibration plate, and the drive force by the actuator is driven by displacement of the vibration plate by the actuator. The active dynamic vibration absorber according to any one of claims 1 to 6 , wherein an incompressible fluid is exerted on the first mounting member and the second mounting member. Based on the reference signal corresponding to the vibration to be damped in the building structure, according to claim 1 to 7 having an active control device for generating control signals for controlling the operation of said actuator in said active vibration damper An active dynamic vibration absorber according to any one of the above.

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