JPH0853954A - Vibration control method of structure and vibration control device - Google Patents

Abstract

PURPOSE:To perform impact excitation by arranging an active vibration control device at a place causing a vibrational obstacle of a structure, and eliminate an unpleasant vibrational obstacle by amplifying excitation force through an amplifying mechanism. CONSTITUTION:An active vibration control device 1 to generate vertical directional vibration control force to negate this vibration is arranged at a place causing a vibrational obstacle of a structure 4. Vibrational information measured by a vibration sensor 2 arranged at the same place is inputted to a control force generating controller 17, and vibration control is performed by controlling the vibration control device 1. This active vibration control device 1 vibrates movable mass 11 in the vertical direction, and performs impact excitation having the same oscillation frequency with the vibrational obstacle, and amplifies object excitation force through an amplifying mechanism 12 synchronized with this oscillation frequency. It also reduces a double harmonic wave component generated at impact excitation time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration control method for solving a vibration obstacle "feeling uncomfortable vibration" occurring in a building or other structure, and a vertical impact type active method used in the method. Vibration control device.

[0002]

2. Description of the Related Art Press machines are operated at a press factory, a large number of human jumps are performed at an aerobics facility, and strong acoustic effects or audience stepping motions are performed at a rock concert venue facility. A large impact force or vibration is generated. The above-mentioned impact force and vibration propagate through the frame of the structure to the upper and lower floors, or propagate through the foundation and ground to induce horizontal and vertical vibrations (resonance) on the floors and beams of neighboring structures, It is known to generate "discomforting vibration" complaints of vibration disorders (see Figure 7). This kind of vibration is often seen in the case where the rotation speed of the press machine, the pitch of the jumping motion of the human being, or the pitch of an integral multiple thereof resonates with the frequency corresponding to the vibration mode peculiar to the structure and resonates. It is known that vibration obstacles occur in the same vibration mode and the same amount of vibration over each floor of an object.

Conventionally, when a vibration mode is a mode peculiar to a floor or a beam of a structure, a tuned mass damper type vibration damping device (TMD) is installed under the floor or under the beam to resonate the vibration mode. Research into technology that suppresses phenomena has been advanced and is already underway. However, when the vibration is caused by propagating through a vertical material such as a pillar of a multi-story structure, that is, as illustrated in FIG. 7, the vibration propagates through the skeleton of the structure to the upper and lower floors, or the foundation or ground. Regarding vibration disturbances such as “propagating uncomfortable vibration” by propagating and causing horizontal and vertical vibrations (resonance) on floors and beams of neighboring structures, effective vibration control measures and technologies have not yet been established. . It is a vibration disorder that occurs in many places (multi-layers) at the same time, and the reality is that individual vibrations cannot be dealt with.

Further, in an active mass damper type vibration damping device (AMD) which actively controls vibration, a sine wave is applied so as to apply a damping force in the opposite direction to the target frequency (sine wave). Driving an additional mass (mass), such a method determines the driving force by the magnitude of mass and amplitude,
As the mass of the structure increases, the driving energy of the mass becomes enormous, which is far from being an energy saving measure against vibration.

[0005]

The object of the present invention is, in particular, when vibration is caused by propagating in a vertical material such as a pillar of a multi-layer structure, and the same vibration mode is applied to each floor of the multi-layer structure. It suppresses unpleasant vibrations generated by similar vibration amount, and it also has low energy (energy saving) and sufficiently effective vibration damping effect, and also effectively damps each floor of multi-story structure in common. Possible vibration control method,
Another object of the present invention is to provide a vertical impact type active vibration damping device used in the above vibration control method.

[0006]

As a means for solving the above problems, a method of controlling vibration of a structure according to the invention of claim 1 cancels the vibration at a place where a vibration failure of the structure 4 occurs. An active vibration damping device 1 that generates a vertical vibration damping force is installed as much as possible, and drive control of the active vibration damping device 1 is performed based on vibration information measured by a vibration sensor 2 installed at the same location to perform vibration damping. In addition, the active vibration damping device 1 vibrates the movable mass 11 in the up-down direction to perform shock vibration on the vibration plate 13 directly below it at the same frequency as the vibration disturbance, and at the same time, to perform amplification in synchronization with the vibration frequency. The mechanism 12 is characterized in that the target excitation force is amplified and the harmonic component generated at the time of impact excitation is reduced.

In the structure vibration control method according to the second aspect of the present invention, when the vibration failure occurs due to the vibration propagating through the vertical member such as the pillar 4a of the multilayer structure 4, one layer is formed. In order to cancel the vibration, an active vibration damping device 1 that generates a vertical vibration damping force is installed, and each layer of the structure is connected by a vertical vibration damping material 5 capable of transmitting the vibration damping force. The active vibration damping device 1 based on the vibration information measured by the vibration sensor 2 installed at the place where the vibration occurs.
Vibration control by virtue of the drive control, and the active vibration control device 1 vibrates the movable mass 11 in the vertical direction so that the vibrating plate 13 therebelow is subjected to shock vibration at the same frequency as the vibration failure. Together with the amplification mechanism 12 tuned to the frequency
It is characterized in that the excitation force is amplified through and the harmonic component generated at the time of impact excitation is reduced.

Further, the active vibration damping device according to the invention of claim 3 is installed in a place where a vibration failure of the structure 4 occurs, and a vibration sensor 2 for measuring vibration information, and a movable mass 11 are provided.
Is driven in the vertical direction to apply an impact vibration to the vibrating plate 13 directly below, the resonance mount 15 on which the vibrating plate 13 is mounted, and the resonance mount 15 at the place where the vibration failure occurs. Based on the detection information of the vibration sensor 2, the elastic support 16 for supporting, the amplification mechanism 12 including the damper 20 in the vertical direction interposed between the resonance frame 15 and the installation place 4b, and the movable mass 11 based on the detection information of the vibration sensor 2. It is characterized in that it is configured with a controller 17 for drive control.

[0009]

Even if the active mass damper 14 is composed of the movable masses 11 having the same mass, when the movable masses 11 are vibrated in a sinusoidal wave to perform non-impact vibration, as shown in FIG. , Aimed (of the same frequency as the vibration disturbance)
Although the peak A of the exciting force is generated in the frequency range, even if the peak A is amplified, the peak A ′ having a magnitude corresponding to the amplification factor is merely generated as the exciting force as illustrated in FIG. On the other hand, in the case of the active vibration damping device 1 for impact vibration according to the present invention, as illustrated in FIG. 3, the peak B of the excitation force having the magnitude corresponding to the impact force is present in the target frequency range. In addition to the above, a so-called overtone peak B ₂ ,
B _3, B ₄ ... is secondarily generated. However, by interposing the amplifying mechanism 12 tuned to the frequency, the exciting force is passed through the filter as shown in FIG. 4 so that the harmonic peaks B ₂ , B ₃ , B ₄ ... As a result, the peak B'in the desired frequency range is generated as a larger amplified excitation force. Incidentally, the magnitude of the peak B'of the shock excitation in FIG. 4 is amplified to about three times the peak A'of the sine wave excitation in FIG. Therefore,
When designing the peak of the excitation force of the same magnitude, to put it simply, the mass of the movable mass 11 in impact excitation is about 1 /
Therefore, the size of the active mass damper 14 can be relatively reduced, and the movable mass 11 can be relatively reduced.
The driving energy for vibrating is only about 1/3, and an energy saving effect can be obtained.

The amplifying mechanism 12 performs tuning by adjusting the natural frequency determined by the weight of the resonance frame 15 and the rigidity (spring property) of the elastic support 16 so as to match the vibration frequency. Be done. Further, the amplification factor of the peak B can be determined by adjusting the attenuation amount of the damper 20. As a result of mutually connecting the layers of the multilayer structure 4 with the vertical damping material 5, the damping force generated by the active damping device 1 installed in one layer is equal to all layers, and the damping effect is equal. Exert.

In the active vibration damping device 1 of the present invention, the controller 17 properly controls the drive of the movable mass 11 based on the vibration information measured by the vibration sensor 2, that is, the vibration mode and the amount of vibration. A vibration damping force that is sufficient to cancel the vibration disturbance of each layer in the structure is generated, and an effective vibration damping effect is achieved.

[0012]

EXAMPLE An example of the present invention shown in the drawings will be described below.
As in the case of FIG. 7, FIG. 1 shows the vibration 8 generated by the operation of the press machine 7 in the multi-storey building 4 adjacent to the press factory 6.
As a countermeasure against the vibration of the resonance phenomenon occurring on the floors 4b and beams on each floor of the building by propagating through the ground and propagating from the foundation of the building to pillars 4a, walls and other vertical materials (frames). The active vibration damping device 1 is installed on the floor 4b on the uppermost floor of the building 4, and a vertical vibration capable of transmitting vibration damping force to the floors 4b (and beams) of each floor at a position directly below the active vibration damping device 1. The floors are rigidly connected by a swing member 5. As the vertical damping material 5, H-shaped steel, I-shaped steel and other steel materials, or precast concrete column materials are preferably used, and bolt joints, shear connectors, anchor bars, etc. are used to connect with the floor of each layer. The connection is made by the concrete embedded joint.

The structural details of the active vibration damping device 1 are shown in FIG. This adopts an electromagnetic actuator as the driving force of the movable mass 11 and the active mass damper 14
Is configured. The movable mass 11 is configured to move (vibrate) in the vertical direction along a vertical center pole (core) 14a, and the cylindrical exciting magnet 1 is provided on the outer periphery thereof.
4b is fixedly arranged, and the magnitude and direction of the current supplied to the exciting magnet 14b is controlled by the controller 17, so that shock excitation having the same frequency as the vibration failure is performed. The vibrating plate 13 is provided directly below the center pole 14a, and the movable mass 11 that has descended is vibrated by the vibrating plate 13.
And impact vibration of the target frequency is applied. The vibrating plate 13 is placed on a resonance frame 15 which constitutes the amplification mechanism 12, and the resonance frame 15 has rigidity in the vertical direction and is deformable and can be deformed by a coil spring, a leaf spring, an air spring, rubber, or plastic. It is supported on the floor 4b of the building by an elastic support 16 such as. Furthermore, the resonance mount 15
A vertical damper 20 made of, for example, silicon oil and a resistance plate is interposed between the above and the floor 4b of the building. The natural frequency of the amplifying mechanism 12 composed of the resonance pedestal 15 and the elastic support 16 is set so as to be synchronized with the vibration frequency (exciting frequency) of vibration, and the damper 20 adjusts the amplification factor. A vibration sensor 2 is installed on the floor 4b, vibration information of the floor 4b measured by the vibration sensor 2 is input to the controller 17, and drive control of the active mass damper 14 is performed based on the vibration information. The damping force (see FIG. 3) due to the vertical impact vibration force generated by the active mass damper 14 is amplified by the amplifying mechanism 12 (see FIG. 4) and is the floor 4b.
And, it is unitarily transmitted to the floors (and beams) of each layer of the building through the vertical damping material 5 to exert a damping effect. The active mass damper 14 is covered with a cover 19 having a soundproof material on its inner surface to reduce impact noise.

When damping a single layer of a building or other structure, the vertical damping material 5 is not necessary, and the active damping device 1 is installed in a place where vibration disturbance occurs, and the same. The vibration sensor 2 is installed at a place, and the same vibration damping effect is obtained.

[0015]

Since the vibration control method of the present invention is a method of damping the vertical impact vibration through the amplifying mechanism 12 and then suppressing the vibration, the vibration damping force has a high amplification factor and is relatively high. The mass of the movable mass 11 can be reduced to reduce vibration damping energy, and an energy saving effect can be obtained. In particular, the vibration control method according to claim 2 uses the vertical damping material 5 to suppress the vibration across each layer when the same vibration mode and amount of vibration are generated across each layer of the multilayer structure. Can be performed efficiently without causing

Further, in the active vibration damping device by impact vibration according to claim 3, the movable mass 1 has a high amplification factor of the vibration damping force.
It is possible to reduce the mass of No. 1 to make it compact and to reduce the vibration damping energy to enjoy the energy saving effect.

[Brief description of drawings]

FIG. 1 is an elevational view of a multi-storey building in which a vibration control method of the present invention is implemented.

FIG. 2 is an elevational view showing an active vibration damping device of the present invention.

FIG. 3 is a waveform diagram of shock excitation.

FIG. 4 is a waveform diagram after amplification.

FIG. 5 is a waveform diagram of sine wave excitation.

FIG. 6 is a waveform diagram after amplification.

FIG. 7 is an elevational view showing a vibration state of a multi-storey building.

[Explanation of symbols]

 4 Structure 1 Active Vibration Control Device 2 Vibration Sensor 11 Movable Mass 13 Vibration Plate 12 Amplification Mechanism 4a Pillar 5 Vertical Vibration Damper 14 Active Mass Damper 15 Resonance Stand 16 Elastic Bearing 17 Controller 20 Damper

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Nobuhiro Kawaguchi 4-1-1 Honmachi, Chuo-ku, Osaka City Takenaka Corporation, Osaka Main Store (72) Inventor Norihiko Kamatani 4-chome, Honmachi, Chuo-ku, Osaka No. 13 Stock Company Takenaka Corporation Osaka Main Store (72) Inventor Teruo Segawa 4-1-1 Honmachi, Chuo-ku, Osaka Stock Company Takenaka Corporation Osaka Main Store (72) Inventor Toshiyuki Tanaka Honmachi, Chuo-ku, Osaka 4-1-13-1 Takenaka Corporation Osaka Main Store (72) Inventor Yasuo Kawada 4-1-1-13 Honmachi, Chuo-ku, Osaka Incorporated Takenaka Corporation Osaka Main Store (72) Inventor Tokichiro Fujiwara Takenaka Kogyo Co., Ltd., 4-13-1, Honmachi, Chuo-ku, Osaka City In-house Takenaka Corporation (72) Yoshinori Takahashi 4-1-1-13, Honmachi, Chuo-ku, Osaka Takenaka Corporation Inside the Sakamoto Store (72) Inventor Shinji Shirakawa 4-13 Hommachi, Chuo-ku, Osaka Stock Company Takenaka Corporation Osaka Main Store (72) Inventor Kazuki Katayama 4-13 Hommachi, Chuo-ku Osaka City Stock Association Takenaka Corporation Osaka Main Store

Claims (3)

[Claims] 1. An active vibration damping device for generating a vertical damping force for canceling the vibration is installed at a place where a structural vibration disturbance occurs, and based on vibration information measured by a vibration sensor installed at the same place. To perform vibration control by controlling the drive of the active vibration control device, and the active vibration control device vibrates the movable mass in the vertical direction to apply a shock vibration having the same frequency as the vibration failure to the vibration plate directly below. A method for controlling vibration of a structure, comprising: amplifying a desired exciting force through an amplifying mechanism that is tuned to the frequency and reducing a harmonic component generated during shock excitation. 2. When a vibration is generated due to the vibration propagating through a vertical member such as a pillar of a multi-layer structure, an active damping force for canceling the vibration is generated in one layer. A vibration damping device is installed and each layer of the same structure is connected by a vertical vibration damping material capable of transmitting the vibration damping force, and based on vibration information measured by a vibration sensor installed at the place where the vibration failure occurs, Vibration control is performed by controlling the drive of the active vibration control device, and the active vibration control device vibrates the movable mass in the vertical direction to perform shock vibration at the same frequency as the vibration failure on the vibration plate directly below. At the same time, a target vibration force is amplified through an amplification mechanism that is tuned to the frequency, and a harmonic component generated at the time of shock vibration is reduced, and a vibration control method for a structure. 3. A vibration sensor installed in a place where vibration trouble of a structure occurs to measure vibration information, and an active mass damper for driving a movable mass vertically to apply a shock vibration to a vibration plate directly below. A resonance mount on which the vibrating plate is mounted, an elastic support for supporting the resonance mount at a place where the vibration failure occurs, and a vertical damper interposed between the resonance mount and the installation place. An active control device for a structure, comprising an amplification mechanism and a controller for driving and controlling the movable mass based on detection information of the vibration sensor.