JPH06200536A - System for preventing propagation of vibration to peripheral construction body - Google Patents

Abstract

PURPOSE:To prevent uncomfortable vibration from propagating from a construction body as a vibration source to an adjacent peripheral construction body. CONSTITUTION:An exciting device 6 is installed at a location adjacent closely to a dome foundation 3 as a vibrating source, and a vibration sensor 10 to measure the vibration of a peripheral ground 1 is provided. Then, based on the vibration measured by the vibration sensor 10, a control signal is outputted from a controller 11 to the exciting device 6 for producing vibration to cancel the vibration generated in the dome. Thus propagation of vibration from the dome to the ground 1 can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention can be applied to the vicinity of a press factory or a structure that is a vibration source such as a facility for accommodating a large number of spectators and performing various events and competitions such as rock concerts and baseball. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration transmission prevention system for surrounding structures that prevents unpleasant vibrations from propagating to a structure.

[0002]

2. Description of the Related Art In a press factory such as that described above, by operating a press machine, and in facilities for performing various events and competitions, due to human jumping motions and violent movements, a large-scale enclosed space such as a dome is also created. In the facility due to, due to vibration due to stepping, jumping, etc., continuous impact force is applied to the ground respectively, and this impact force causes extremely large ground vibration, and this ground vibration causes buildings, offices,
There was a problem that vertical and horizontal vibrations of surrounding structures such as private houses were induced, which deteriorated the living environment of neighboring residents.

[0003]

However, in order to solve the above problems, conventionally, in a structure which is a vibration source, an elastic material is interposed between the floor and the foundation of the structure to prevent the vibration from the ground. It was only enough to weaken the impact force on, and could not be effectively resolved.

The present invention has been made in view of the above-mentioned circumstances, and the vibration propagation preventing system for a peripheral structure according to the invention of claim 1 is a system for vibrating from a structure serving as a vibration source to a surrounding area. It is intended to prevent the propagation of unpleasant vibration to a structure. A vibration propagation preventing system for a peripheral structure according to a second aspect of the present invention has an object to more effectively prevent the above-mentioned uncomfortable vibration propagation. A vibration propagation preventing system for a peripheral structure according to a third aspect of the present invention aims to effectively prevent the above-mentioned uncomfortable vibration propagation in response to a change in vibration at a vibration source. To do. Further, the vibration propagation preventing system for a peripheral structure of the invention according to claim 4 can prevent uncomfortable vibration from a structure serving as a vibration source to a structure in the vicinity thereof even when there is vibration noise from a source other than the vibration source. The purpose is to enable good prevention of propagation. In addition, claim 5
The system for preventing vibration propagation to the peripheral structure of the invention according to
An object of the present invention is to make it possible to effectively prevent the propagation of the above-mentioned unpleasant vibration while reducing the device scale. A vibration propagation preventing system for a peripheral structure according to a sixth aspect of the present invention has an object to more effectively prevent the propagation of the unpleasant vibration described above. In addition, claim 7
The system for preventing vibration propagation to the peripheral structure of the invention according to
It is an object of the present invention to effectively prevent the above-mentioned unpleasant vibration from being propagated in response to a change in vibration at the vibration source.
Further, according to the vibration propagation preventing system for a peripheral structure of the invention according to claim 8, even when there is vibration noise from a source other than the vibration source, an uncomfortable vibration from the structure serving as the vibration source to the structures in the vicinity of the vicinity is prevented. The purpose is to enable good prevention of propagation. Further, the vibration propagation preventing system for a peripheral structure of the invention according to claim 9 is a vibration source even when there is vibration noise from a source other than the vibration source with a simple control configuration using a rational filter. An object of the present invention is to make it possible to favorably prevent an unpleasant vibration from propagating from a structure to structures in the vicinity of the vicinity.

[0005]

In order to achieve the above-mentioned object, a system for preventing vibration from propagating to a peripheral structure according to a first aspect of the present invention is located near a foundation of a structure serving as a vibration source. An oscillating device is installed on the base to install a vibration sensor that measures the vibration of the ground around the foundation, and a vibration that cancels the vibration is generated based on the vibration measured by the vibration sensor. The shaking device is provided with a control means for outputting a control signal.

Further, in order to achieve the above-mentioned object, the vibration propagation preventing system for a peripheral structure according to a second aspect of the invention is a vibration propagation preventing system for a peripheral structure according to the first aspect of the invention. The base pedestal in 1 is configured to be supported on the support ground via an elastic body.

Further, in order to achieve the above-mentioned object, the vibration propagation preventing system for a peripheral structure according to a third aspect of the invention is a vibration propagation preventing system for a peripheral structure according to the second aspect of the invention. The elastic body in which the natural frequency can be changed and controlled, a third vibration sensor for measuring the vibration of the base frame is provided, and the elastic body is based on the vibration measured by the vibration sensor and the third vibration sensor. It is configured by providing an exciting force amplification control mechanism that changes the natural frequency of the base frame supported by and resonates to follow the change in the frequency of the ground vibration.

In order to achieve the above-mentioned object, the vibration propagation preventing system for a peripheral structure according to a fourth aspect of the present invention provides the peripheral structure according to any one of the first to third aspects. The vibration sensor in the vibration propagation prevention system is provided with a filter for removing a vibration component other than the vibration source, and outputs a control signal to the control means based on the vibration passing through the filter.

Further, in order to achieve the above-mentioned object, the vibration propagation preventing system for a peripheral structure according to a fifth aspect of the present invention is based on an intermediate portion between the structure serving as a vibration source and the peripheral structure. An oscillating device is provided through the gantry, and a second vibration sensor for measuring the vibration transmitted from the structure to the surrounding structures is provided around the foundation pedestal, and based on the vibration measured by the second vibration sensor, A control means for outputting a control signal to the vibration generating device so as to generate a vibration that cancels the vibration is provided.

Further, in order to achieve the above-mentioned object, the vibration propagation preventing system for a peripheral structure according to a sixth aspect of the invention is a vibration propagation preventing system for a peripheral structure according to the fifth aspect of the invention. The base pedestal in 1 is configured to be supported on the support ground via an elastic body.

In order to achieve the above-mentioned object, the vibration propagation preventing system for a peripheral structure according to a seventh aspect of the present invention is a vibration propagation preventing system for a peripheral structure according to the sixth aspect of the invention. The elastic body in which the natural frequency can be controlled to be changed, a third vibration sensor for measuring the vibration of the base frame is provided, and the elastic body is based on the vibration measured by the second and third vibration sensors. It is configured by providing an exciting force amplification control mechanism that changes the natural frequency of the base frame supported by and resonates to follow the change in the frequency of the ground vibration.

Further, in order to achieve the above-mentioned object, the vibration propagation preventing system for a peripheral structure of the invention according to claim 8 is the same as the peripheral structure according to any one of claims 5 to 7. The second vibration sensor in the vibration propagation prevention system is provided with a filter for removing a vibration component other than the vibration source, and a control signal is output to the control means based on the vibration passed through the filter.

Further, in order to achieve the above-mentioned object, the vibration propagation preventing system for a peripheral structure according to a ninth aspect of the invention propagates a vibration to the peripheral structure for the invention according to the fourth or eighth aspect. The filter in the prevention system is a one-degree-of-freedom filter.

[0014]

According to the structure of the system for preventing vibration propagation to the peripheral structure of the invention according to claim 1, when the structure which is a vibration source is vibrated, the control means outputs a control signal to the vibrating device, The vibration that cancels the generated vibration can be generated by the vibration generating device, and the vibration itself can be prevented from propagating from the structure that is the vibration source to the periphery of the ground that supports it.

Further, according to the structure of the vibration propagation preventing system for the peripheral structure of the invention according to claim 2, the vibration applied to the ground from the vibrating device through the foundation pedestal is amplified by the elastic body to generate the vibration. Even if the exciting force generated by the device is small, a large control vibration can be applied to the ground.

According to the structure of the vibration propagation preventing system for the peripheral structure of the invention according to claim 3, the natural frequency of the elastic body is adjusted to the frequency of the vibration generated in the structure serving as the vibration source. With the phase shifted by a half wavelength, the amplified vibration for canceling the vibration propagating from the structure can be always applied to the ground through the foundation pedestal and the elastic body.

Further, according to the structure of the vibration propagation preventing system for the peripheral structure of the invention according to claim 4, since the frequency applied from the vibration source can be specified in advance, even if there is vibration noise from other than the vibration source. , The vibration component is removed, and the vibration that cancels the generated vibration is generated by the vibration generator only based on the vibration from the vibration source, and the vibration from the structure that is the vibration source to the surrounding of the ground supporting it. Propagation can be prevented.

According to the structure of the vibration propagation preventing system for the peripheral structure of the invention according to claim 5, vibration is generated in the structure serving as the vibration source, and the vibration is generated in the vicinity of the predetermined peripheral structure. When it propagates to the foundation frame installed in the middle of, the control means outputs a control signal to the vibration generator, and the vibration generator cancels the generated vibration, and the vibration is generated to the ground through the foundation frame. However, it is possible to block the propagation of vibration at an intermediate portion between the structure that is the vibration source and the peripheral structure.

Further, according to the structure of the vibration propagation preventing system for the peripheral structure of the invention according to claim 6, the vibration applied to the ground from the vibration generating device through the foundation pedestal is amplified by the elastic body to generate the vibration. Even if the exciting force generated by the device is small, a large control vibration can be applied to the ground.

Further, according to the structure of the vibration propagation preventing system for the peripheral structure of the invention according to claim 7, the natural frequency of the elastic body is adjusted to the frequency of the vibration generated in the structure serving as the vibration source, With the phase shifted by a half wavelength, the amplified vibration for canceling the vibration propagating from the structure can be always applied to the ground through the foundation pedestal and the elastic body.

Further, according to the structure of the vibration propagation preventing system for the peripheral structure of the invention according to claim 8, since the frequency applied from the vibration source can be specified in advance, even if there is vibration noise from other than the vibration source. , The vibration component is removed, and the vibration that cancels the generated vibration is generated by the vibration generator only based on the vibration from the vibration source, and the vibration from the structure that is the vibration source to the surrounding of the ground supporting it. Propagation can be prevented.

According to the structure of the vibration propagation preventing system for the peripheral structure of the invention according to claim 9, the one-degree-of-freedom filter has a transfer function as shown in FIG. As shown in (a) of 15, the vibration noise from other than the vibration source can be removed. Also, paying attention to the fact that a one-degree-of-freedom system filter causes a 90 ° phase delay, and further, when a damping force is applied by a vibration generator, the 90 ° Combined with the phase delay, a phase delay of 180 ° is naturally generated as a whole, and a force for canceling the vibration from the vibration source can be applied without performing phase compensation.

[0023]

Embodiments of the present invention will now be described in detail with reference to the drawings.

<First Embodiment> FIG. 1 is an overall schematic vertical sectional view showing a first embodiment of a system for preventing vibration transmission to a peripheral structure according to the present invention. A pile foundation 2 is constructed on a ground 1. At the same time, a foundation 3 is constructed on the pile foundations 2, ..., A dome D as a structure serving as a vibration source is constructed on the foundation 3, and an elastic body is formed at a position close to the foundation 3. A base frame 5 is provided via the first air springs 4 ..., and a vibrating device 6 for preventing the vibration generated in the dome D from propagating to the ground 1 on the base frame 5.
... is provided.

As shown in the side view of the main part of FIG. 2, the vibrating device 6 has arms 8a and 8b having weights 7a and 7b connected to the ends thereof by electric motors 9a and 9b in a concentric horizontal direction. It is provided so that it can rotate in opposite directions around the axis of the shaft and can be driven and rotated so as to face the same direction only in the vertical direction, and the vibration in the vertical direction can be generated by the centrifugal force of the weights 7a and 7b accompanying the rotation. Is configured.

A vibration sensor 10 for measuring the vibration of the surrounding ground 1 is provided at a predetermined location on the ground 1 around the foundation 2.
The vibration sensor 10 has a controller 1 as a control means.
1 is connected, and the controller 12 is connected to the controller 12 of the electric motors 9a and 9b, and based on the vibration measured by the vibration sensor 10, a control for generating the vibration necessary to cancel the vibration. Signal to controller 12
To control the vibration generated by the vibration generator 6 by changing the number of rotations of the electric motors 9a and 9b.

A compressor 16 is connected to the first air springs 4 through a pipe 15 in which a flow control valve 14 is interposed, and a vibration is generated by a vibrating device 6 on a base frame 5. 3 vibration sensor 17 is provided, the vibration sensor 10 and the third vibration sensor 17 are connected to a second controller 18, and the flow rate control valve 14 is connected to the second controller 18, and the vibration sensor Based on the vibration measured by the 10th and 3rd vibration sensor 17, the internal pressure with respect to the 1st air spring 4 ... is adjusted, the natural frequency of the base stand 5 is changed, and it is made to resonate, and the frequency of the ground vibration is changed. The excitation force amplification control mechanism is configured to follow the change.

With the above construction, even if vibration occurs in the dome D due to a jumping motion of a spectator at a rock concert or the like, the vibrating devices 6 ... Are automatically operated according to the generated vibration. Then, the vibration that cancels the generated vibration is generated, and the propagation of the vibration itself from the foundation 3 to the ground 1 can be prevented.

That is, as shown in the schematic side view of FIG. 3A, when vibration occurs in the dome D, the vibration W1 due to the impact force f of the dome D causes the peripheral structure 13 through the ground 1.
However, even if the vibration W1 is generated in the dome D by the operation of the vibration exciter 6, ..., The vibration W2 that gives the damping force F to the vibration W1 to the adjacent ground of the foundation 3 and cancels the vibration W1. Generated and not propagated from the foundation 3 to the surrounding ground 1, as shown in the schematic side view of FIG. 3B, the vibration W propagated to the peripheral structure 13 is reduced, and uncomfortable vibration is propagated. Prevent it.

At this time, by operating the above-mentioned excitation force amplification control mechanism and adjusting the natural frequency of the first air springs 4, ..., The frequency applied to the ground 1 from the foundation stand 5 is According to the frequency of the vibration propagating from the foundation 3 to the ground 1, the vibration applied to the ground 1 from the foundation pedestal 5 is effectively amplified by resonating in a state shifted by half a wavelength, and the frequency of the vibration generated in the dome D is Even if the vibration changes, it is possible to effectively prevent the vibration from propagating to the peripheral structure 13 in response to the change.

<Second Embodiment> FIG. 4 is an overall schematic vertical sectional view showing a second embodiment of the vibration propagation preventing system for a peripheral structure according to the present invention. The dome D and the peripheral structure 13 are shown in FIG. A solid foundation 19 is constructed on the ground 1 at a midway point (see FIG. 6) to be connected linearly, and a foundation frame 21 is constructed on the solid foundation 19 via a second air spring 20 as an elastic body. On the foundation pedestal 21, vibration generating devices 6 ... Are provided for preventing the vibration generated in the dome D from propagating to the peripheral structure 13.

As shown in the side view of the main part of FIG. 5, the vibrating device 6 has arms 8a and 8b having weights 7a and 7b connected to the ends thereof by electric motors 9a and 9b in the concentric horizontal direction. It is provided so that it can rotate in opposite directions around the axis of the shaft and can be driven and rotated so as to face the same direction only in the vertical direction, and the vibration in the vertical direction can be generated by the centrifugal force of the weights 7a and 7b accompanying the rotation. Is configured. This structure is the same as that of the first embodiment.

A second vibration sensor 22 for measuring the vibration generated in the dome D and propagating to the peripheral structure 13 is provided at a predetermined position of the ground 1 around the solid foundation 19, and the second vibration sensor 22 is provided.
Of the electric motors 9a and 9b is connected to the third controller 23 as a control means, and is measured by the second vibration sensor 22. Based on the vibration
A control signal for generating the vibration necessary for canceling the vibration is output to the controller 12, and the vibrations generated by the vibration oscillating device 6 can be controlled by changing the rotation speeds of the electric motors 9a and 9b. ing.

A compressor 16 is connected to the second air spring 20 via a pipe 15 having a flow control valve 14 as in the first embodiment, and a foundation pedestal 21.
A third vibration sensor 17 for measuring the vibration generated by the vibrating device 6 is provided, and the third vibration sensor 17 and the second vibration sensor 22 are connected to the second controller 18 and the second The flow control valve 14 is connected to the controller 18 of the second vibration sensor 22 and the second vibration sensor 22 and the third vibration sensor 17 measure the second vibration based on the vibration.
Adjust the internal pressure of the air spring 20 ...
The excitation force amplification control mechanism is configured so as to change the natural frequency to cause resonance and follow changes in the frequency of ground vibration.

With the above construction, vibration is generated in the dome D due to the jumping motion of the audience at the time of a rock concert, etc., and the generated vibration is propagated to the ground 1 and further to the peripheral structure 13 side. Even if the vibration propagates, the vibration generators 6 ... Are automatically operated according to the vibration to generate a vibration that cancels the generated vibration, and the vibration propagates from the foundation 3 to the peripheral structure 13 via the ground 1. Can be prevented.

That is, as shown in the schematic side view of FIG. 6 (a), when vibration occurs in the dome D, the vibration W1 due to the impact force f thereof passes through the ground 1 and the peripheral structure 13
However, the vibration of the foundation frame 21 is caused by the operation of the vibration generators 6 ...
From the ground to the ground 1, the vibration W propagated to the ground 1
The vibration damping force F for 1 is applied to the ground 1 at an intermediate point between the dome D and the peripheral structure 13 to generate the vibration W2 that cancels the vibration W1, and as shown in the schematic side view of FIG. The vibration W propagated from 3 to the peripheral structure 13 via the ground 1 is reduced to prevent uncomfortable vibration from being propagated.

Further, at this time, even if the frequency of the vibration generated in the dome D changes, the amplification control mechanism described above is operated to effectively respond to the change as in the first embodiment. It is possible to prevent the vibration from propagating to the peripheral structure 13.

<Third Embodiment> FIG. 7 is a side view of the essential parts of a third embodiment of a vibration propagation preventing system for a peripheral structure according to the present invention. It is as follows. That is, the vibrating device 6 is configured by supporting the heavy load 24 on the base 21 via the double-acting air cylinder 25, and based on the vibration measured by the second vibration sensor 22, the vibration A control signal for generating a vibration required to cancel the vibration is output to a control valve (not shown) of the air cylinder 25 so that the heavy load 24 can be vertically reciprocated to control the vibration generated by the vibration generator 6. Is configured. The other structure is the same as that of the second embodiment, and the description thereof is omitted by giving the same reference numerals. The vibration generator 6 of the third embodiment may be applied to the first embodiment.

<Fourth Embodiment> FIG. 8 is a side view of the essential portions of a fourth embodiment of the vibration propagation preventing system for a peripheral structure according to the present invention. It is as follows. That is, the vibrating device 6 is configured by supporting the foundation stand 21 itself via the double-acting air cylinder 26, and is necessary to cancel the vibration based on the vibration measured by the second vibration sensor 22. A control signal for generating various vibrations is output to a control valve (not shown) of the air cylinder 26 to vertically reciprocate the base 21 to control the vibration generated by the vibration generator 6. There is. The other structure is the same as that of the second embodiment, and the description thereof is omitted by giving the same reference numerals. The vibration generator 6 of the fourth embodiment may be applied to the first embodiment.

<Fifth Embodiment> FIG. 9 is an overall schematic vertical sectional view showing a fifth embodiment of the vibration propagation preventing system for the peripheral structure according to the present invention. The difference from the second embodiment is as follows.
It is as follows. That is, the solid foundation 19 is supported by the underground structure 28 via the third air springs 27 ....
The other structure is the same as that of the second embodiment, and the description thereof is omitted by giving the same reference numerals.

<Sixth Embodiment> FIG. 10 is an overall schematic vertical sectional view showing a sixth embodiment of a vibration propagation preventing system for a peripheral structure according to the present invention. The difference from the fifth embodiment is as follows. It is as follows. That is, the underground structure 28 is the pile 2
It is supported by the support ground 30 via 9 ... The other structure is the same as that of the fifth embodiment, and the description thereof is omitted by giving the same reference numerals.

<Seventh Embodiment> FIG. 11 is a block diagram showing a seventh embodiment of a vibration propagation preventing system for a peripheral structure according to the present invention, in which a bandpass filter (BPF) 3 is used.
1, the phase compensation circuit 32, and the driver 33 configure the controller 11, and the signal based on the vibration measured by the vibration sensor 10 is input to the bandpass filter 31 that removes vibration components other than the vibration from the dome D. At the same time, the signal passed through the bandpass filter 31 is configured to be input to the driver 33 via the phase compensating circuit 32 for eliminating the phase shift. Further, a signal based on the vibration measured by each of the vibration sensor 10 and the third vibration sensor 17 is input to the second controller 18. The other structure is the same as that of the first embodiment, and the description thereof is omitted by giving the same reference numerals.

According to the structure of the seventh embodiment, of the vibrations measured by the vibration sensor 10, only the vibration from the dome D is taken out and a control signal is output to the vibration generating device 6 so that the vibration generating device 6 can control the vibration. A damping force that cancels only the vibration from the dome D can be applied. Further, the natural frequency of the base 5 can be changed based on the vibration from the dome D.

<Eighth Embodiment> FIG. 12 is a block diagram showing an eighth embodiment of the system for preventing vibration propagation to a peripheral structure according to the present invention, which is a bandpass filter (BPF) 3
1 by the phase compensation circuit 32 and the driver 33
Controller 23 of the second vibration sensor 22
The signal based on the vibration measured at is input to the bandpass filter 31 that removes vibration components other than the vibration from the dome D, and the signal passed through this bandpass filter 31 eliminates the phase shift. The signal is input to the driver 33 via the phase compensation circuit 32. Further, a signal based on the vibration measured by each of the second vibration sensor 22 and the third vibration sensor 17 is input to the second controller 18. The other structure is the same as that of the second embodiment, and the description thereof is omitted by giving the same reference numerals.

According to the structure of the eighth embodiment, among the vibrations measured by the second vibration sensor 22, only the vibration from the dome D is taken out and the control signal is outputted to the vibration generator 6.
The vibrating device 6 can apply a damping force that cancels only the vibration from the dome D. Also,
The natural frequency of the base pedestal 5 can be changed based on the vibration from the dome D.

Instead of the band pass filter (BPF) 31 in each of the seventh and eighth embodiments, a low pass filter (LPF) and a high pass filter (HP).
F), a band elimination filter (BRF), or the like may be used, and in short, it may be appropriately selected and used according to the nature of vibration generated from the vibration source such as the dome D.

<Ninth Embodiment> FIG. 13 is a block diagram showing a ninth embodiment of a vibration propagation preventing system for a peripheral structure according to the present invention. The difference from the seventh embodiment is as follows. Is. That is, the controller 11 includes the one-degree-of-freedom system filter 34 and the driver 33, and the signal based on the vibration measured by the vibration sensor 10 is transmitted to the dome D.
Is inputted to the one-degree-of-freedom system filter 34 which removes vibration components other than the vibration from the, and the signal passed through the one-degree-of-freedom system filter 34 is directly inputted to the driver 33. Further, a signal based on the vibration measured by each of the vibration sensor 10 and the third vibration sensor 17 is input to the second controller 18.

The one-degree-of-freedom filter 34 has an absolute coordinate system equation of motion (d ² X / dt ² ) + 2hω {(dX / dt)-(dX
₀ / dt)} + ω ² (X−X ₀ ) = 0 or relative coordinate system equation of motion (d ² X / dt ² ) + 2hω (dX / dt) + ω ² X =
It has a function of − (d ² X ₀ / dt ² ). Here, (d ² X ₀ / dt ² ) is an input from the vibration sensor 10, (d ² X / dt ² ) is an output to the driver 33, and h is a damping constant. And ω
Is the natural circular frequency, and is specified from the frequency f of the vibration generated from the vibration source with ω = 2πf.

In the one-degree-of-freedom system filter 34, the transfer function in the case of having the function of the equation of motion of the absolute coordinate system, the graph of the relationship between the amplitude ratio and the frequency of FIG. 14A and the graph of FIG. As shown in the graph of the relationship between the phase and the frequency in (b), the output with respect to the input is the natural frequency f
Has a 90 ° phase lag at. The transfer function in the case of having the function of the equation of motion in the relative coordinate system is also shown in FIG.
As shown in the graph of the relationship between the amplitude ratio and the frequency of (c) in FIG. 4 and the graph of the relationship between the phase and the frequency in (d) of FIG. 14, the output with respect to the input is at the natural frequency f.
It has a phase delay of 90 °.

In both the relative coordinate system motion equation and the absolute coordinate system motion equation, the natural circular frequency ω is specified from the frequency f of the vibration generated from the vibration source, and the damping constant h is set to an appropriate value. If set, the amplification factor at frequency f is 1 /
2h, and for example, when the damping constant h is set to 5%, the output frequency component is amplified 10 times. The other structure is the same as that of the seventh embodiment, and the description thereof is omitted by giving the same reference numerals.

According to the structure of the ninth embodiment, as shown in the graph of the relationship between the amplitude and the frequency in FIG. 15 and the waveform diagram in FIG. The vibration sensor 10 including the vibration that is a noise component
With respect to the vibration [(a) in FIG. 15 and (a) in FIG. 16] input from, the one-degree-of-freedom filter 34 [(b) in FIG. 15] removes vibration noise from sources other than the vibration source. Only the target frequency component (indicated by T in FIG. 15) is extracted, and the frequency component is amplified [(c) in FIG. 15].
With the phase being delayed by 90 ° [(b) in FIG. 16], the output frequency component is output to the vibration generator 6 as a control signal, and only the vibration from the dome D is generated by the vibration generator 6. It is possible to add a damping force that cancels. The base 5 supported by the elastic body resonates, and when this damping force is applied to the ground, the phase is further increased.
90 ° delay, resulting in 180 ° phase delay as a whole [Fig.
(C)], even if the phase compensation is not performed, the dome D
A damping force that cancels only the vibration from can be applied.

<Tenth Embodiment> FIG. 17 is a block diagram showing a tenth embodiment of the system for preventing vibration propagation to peripheral structures according to the present invention. The difference from the eighth embodiment is that:
It is as follows. That is, the third controller 23 is composed of the one-degree-of-freedom filter 34 and the driver 33, and the signal based on the vibration measured by the second vibration sensor 22 removes vibration components other than the vibration from the dome D. The signal is input to the one-degree-of-freedom filter 34, and the signal passed through the one-degree-of-freedom filter 34 is directly input to the driver 33. Also,
A signal based on the vibration measured by each of the second vibration sensor 22 and the third vibration sensor 17 is input to the second controller 18. The other structure is the same as that of the eighth embodiment, and the operation is the same as that described in the ninth embodiment, and the description thereof will be omitted by giving the same reference numerals.

According to the tenth embodiment, since the second vibration sensor 22 is provided between the dome D, which is the vibration source, and the peripheral structure 13, the second vibration sensor such as the peripheral structure 13 side. The sensor 22 is susceptible to vibrations other than the vibration from the dome D, but the vibrations that are noise can be removed by the one-degree-of-freedom system filter 34, and it is better that the vibrations from the dome D propagate to the peripheral structure 13. It has the advantage that it can be prevented.

FIG. 18 is a circuit diagram showing a modification of the one-degree-of-freedom filter 34, in which an electric circuit is constructed by connecting a coil L, a resistor R, and a capacitor C in series. By setting the resonance frequency determined by the coil L and the resistor R capacitor C so as to correspond to the frequency of the vibration generated from the dome D, the above-described vibration sensor 10 or the second vibration sensor 18 is set. The output voltage e corresponding to the resonance frequency can be taken out from the coil L as the voltage E based on the vibration from is input, and the vibrations other than the vibration from the dome D can be generated by the one-degree-of-freedom filter 34. In addition to being removed, the coil L allows the signal voltage to be extracted with the phase being delayed by 90 °. The configuration of the analog resonance circuit and the configuration of directly solving the differential equation by the digital circuit as described above correspond to the one-degree-of-freedom filter referred to in the claims (Claim 9).

In each of the above embodiments, the vertical vibrations are cancelled. However, for example, in the vibration oscillating device 6 of the first embodiment, the weights 7a and 7b are changed in the same direction. Then, the damping force F applied by the vibration generator 6
May be configured to be horizontal so that horizontal vibration generated in the structure can be prevented from propagating to the surrounding structures, and can be selected or combined depending on the vibration to be canceled. You can do it.

[0056]

As described above, according to the vibration propagation preventing system for a peripheral structure of the invention according to claim 1, the vibration propagation from the structure which is the vibration source to the periphery of the ground supporting it. Since this is prevented, it is possible to prevent unpleasant vibrations from propagating from the vibration source structure to the surrounding structures and improve the living environment of neighboring residents.

Further, according to the vibration propagation preventing system for the peripheral structure of the invention of claim 2, the vibration applied to the ground from the vibrating device through the foundation frame is amplified by the elastic body. Even if the vibration force caused by the vibration is small, a large control vibration can be applied to the ground, and it is possible to effectively prevent the vibration from propagating to the surrounding structure while reducing the scale of the vibration generator, which is economical. .

Further, according to the vibration propagation preventing system for a peripheral structure of the invention of claim 3, the natural frequency of the elastic body is adjusted according to the change of the vibration in the structure, and the vibration is propagated from the structure. Since the amplified vibration for canceling the vibration is applied to the ground through the foundation pedestal and the elastic body, the vibration propagating from the structure can be efficiently canceled regardless of the change in the vibration in the structure, and the vibration is generated. While further reducing the scale of the device, it is possible to effectively prevent the vibration from propagating to the peripheral structure, which is more economical.

Further, if there is vibration noise from a source other than the vibration source and control is performed in a state in which vibration components from sources other than the vibration source are mixed, a large vibration may be locally generated. According to the vibration propagation preventing system for a peripheral structure of the invention, the vibration component from other than the vibration source is removed and only the vibration from the vibration source is canceled, so that the vibration from the vibration source propagates to the peripheral structure. Can be prevented very well.

Further, according to the vibration propagation preventing system for a peripheral structure of the invention of claim 5, it is generated in the structure which is the vibration source at an intermediate point between the structure which is the vibration source and the peripheral structure. The vibration that cancels the vibration is generated by the vibration generator, and the vibration is applied to the ground via the foundation stand to block the propagation of the vibration to the surrounding structures, so the vibration generated by the structure that is the vibration source is the basis. Since the vibration is dampened before it propagates to the gantry, it is sufficient to generate a vibration smaller than the vibration generated in the structure by the vibration exciter as a vibration to cancel the vibration, while reducing the scale of the vibration exciter. It is economical because vibration can be effectively prevented from propagating to the surrounding structure.

Further, according to the vibration propagation preventing system for the peripheral structure of the invention of claim 6, the vibration applied to the ground from the vibrating device via the foundation mount is amplified by the elastic body. Even if the vibration force caused by the vibration is small, a large control vibration can be applied to the ground, and it is possible to effectively prevent the vibration from propagating to the surrounding structures while further reducing the scale of the vibration generator. Is.

Further, according to the vibration propagation preventing system for a peripheral structure of the invention as defined in claim 7, the natural frequency of the elastic body is adjusted according to the change of the vibration in the structure, and the vibration is propagated from the structure. Since the amplified vibration for canceling the vibration is applied to the ground through the foundation pedestal and the elastic body, the vibration propagating from the structure can be efficiently canceled regardless of the change in the vibration in the structure, and the vibration is generated. While further reducing the scale of the device, it is possible to effectively prevent the vibration from propagating to the peripheral structure, which is more economical.

If there is vibration noise from a source other than the vibration source and control is performed in a state where vibration components from sources other than the vibration source are mixed, a large vibration may be locally generated. According to the system for preventing vibration from propagating to the surrounding structures, the vibration components from sources other than the vibration source are removed and only the vibrations from the vibration source are canceled, so it is extremely possible that the vibration from the vibration source propagates to the surrounding structures. It can be prevented satisfactorily.

Further, according to the vibration propagation preventing system for a peripheral structure of the invention of claim 9, the vibration noise other than the vibration source is removed by passing through the one degree of freedom system filter, and only the vibration from the vibration source is eliminated. Since it responds to, it was possible to construct a system that is energy-saving and resistant to noise. Also,
90 degree phase lag due to passing through a one degree of freedom system filter, and 90 when the base pedestal via the elastic body resonates
Using the phase delay of °, without providing a phase compensation circuit,
With a simple control configuration, it is possible to prevent the vibration from the vibration source from propagating to the peripheral structure, which is more economical.

[Brief description of drawings]

FIG. 1 is an overall schematic vertical cross-sectional view showing a first embodiment of a vibration propagation preventing system for a peripheral structure according to the present invention.

FIG. 2 is a side view of a main part.

FIG. 3 is a schematic side view.

FIG. 4 is an overall schematic vertical sectional view showing a second embodiment.

FIG. 5 is a side view of a main part.

FIG. 6 is a schematic side view.

FIG. 7 is an overall schematic vertical sectional view showing a third embodiment.

FIG. 8 is an overall schematic vertical sectional view showing a fourth embodiment.

FIG. 9 is a side view of an essential part showing a fifth embodiment.

FIG. 10 is a side view of an essential part showing a sixth embodiment.

FIG. 11 is a block diagram showing a seventh embodiment.

FIG. 12 is a block diagram showing an eighth embodiment.

FIG. 13 is a block diagram showing a ninth embodiment.

14A and 14C are graphs showing the relationship between the amplitude ratio and the frequency, and FIGS. 14B and 14D are graphs showing the relationship between the phase and the frequency.

FIG. 15 is a graph showing the relationship between amplitude and frequency.

FIG. 16 is a waveform diagram.

FIG. 17 is a block diagram showing a tenth embodiment.

FIG. 18 is a circuit diagram showing a modification of the one-degree-of-freedom filter.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Ground 3 ... Foundation 4 ... 1st air spring as an elastic body 5 ... Foundation stand 6 ... Exciting device 10 ... Vibration sensor 11 ... Controller as control means 13 ... Peripheral structure 17 ... 3rd vibration sensor 20 ... second air spring 21 as elastic body 21 foundation frame 22 second vibration sensor 23 third controller 31 as control means 31 bandpass filter 34 one-degree-of-freedom system filter D ... dome as structure

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Yoshinori Takahashi, 2-5-14 Minamisuna, Koto-ku, Tokyo Inside the Takenaka Corporation Technical Research Institute (72) Inventor Kazuki Katayama 2-chome, Minamisuna, Koto-ku, Tokyo No. 14 Incorporated Takenaka Corporation Technical Research Institute (72) Inventor Hirokazu Yoshioka 2-5-14 Minamisuna, Koto-ku, Tokyo Incorporated Takenaka Industrial Engineering Laboratory (72) Inventor Masashi Yasuda Amagasaki City, Hyogo Prefecture Minami Hatsushima Town 10th 133 Inside Patent Equipment Co., Ltd.

Claims (9)

[Claims] 1. A vibrating device is provided near a foundation of a structure as a vibration source via a foundation stand, and a vibration sensor for measuring vibration of the ground around the foundation is provided.
A system for preventing vibration propagation to a peripheral structure, characterized in that, based on the vibration measured by the vibration sensor, control means is provided for outputting a control signal to the vibration generating device so as to generate a vibration that cancels the vibration. . 2. A vibration propagation preventing system for a peripheral structure, which supports the foundation stand according to claim 1 with respect to a supporting ground via an elastic body. 3. The elastic body according to claim 2, wherein the natural frequency of the elastic body is changeable and controllable, and a third vibration sensor for measuring the vibration of the base is provided, and the vibration sensor and the third vibration sensor are provided.
Based on the vibration measured by the vibration sensor, the oscillating force amplification control mechanism that changes the natural frequency of the base frame supported by the elastic body to resonate and follows the change of the ground vibration frequency is provided. A vibration transmission prevention system for surrounding structures. 4. The vibration sensor according to claim 1, further comprising a filter for removing a vibration component other than the vibration source, and a control signal is sent to the control means based on the vibration passing through the filter. A vibration transmission prevention system for the output peripheral structure. 5. An oscillating device is provided at an intermediate position between a structure serving as a vibration source and a peripheral structure via a foundation pedestal, and vibration transmitted from the structure to the peripheral structure is measured around the foundation pedestal. And a control means for outputting a control signal to the vibrating device so as to generate a vibration that cancels the vibration based on the vibration measured by the second vibration sensor. A system for preventing vibration from propagating to surrounding structures. 6. A vibration transmission preventing system for a peripheral structure, which supports the foundation frame according to claim 5 with respect to a supporting ground via an elastic body. 7. The elastic body according to claim 6 is configured so that its natural frequency can be changed and controlled, and a third vibration sensor for measuring the vibration of the base frame is provided, and the second and third vibration sensors are provided. Based on the vibration measured in, the natural frequency of the foundation pedestal supported by the elastic body is changed to cause resonance, and a vibrating force amplification control mechanism is provided to follow changes in the frequency of ground vibration. Vibration propagation prevention system for structures. 8. The second vibration sensor according to claim 5, further comprising a filter for removing a vibration component from other than the vibration source, and the control means is based on the vibration passing through the filter. A vibration propagation prevention system that outputs control signals to surrounding structures. 9. A vibration propagation preventing system for a peripheral structure, wherein the filter according to claim 4 or 8 is a one-degree-of-freedom filter.