JP2001049880A - Adjusting method of dynamic damper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a living space comfortable for a resident regardless of a locational condition, and to efficiently adjust a dynamic damper for reducing an influence of a vibration pollution for a citizen in a three-storied residence, in which a building frame is constituted of steel structure and which has beam- connected rigid frame configuration. SOLUTION: The dynamic damper 26 is adjusted by the vibration characteristics of a ground and vibration characteristics received at the position of the arrangement of the dynamic damper 26. The dynamic damper is adjusted by the vibration characteristics of the ground and vibration characteristics measured by installing an acceleration sensor or the like on the dynamic damper 26 at the position of the arrangement. The vibration characteristics of the dynamic damper 26 are kept within a range of 2-5 Hz. The vibration characteristics are made consistent with a frequency having largest amplitude within the range of 2-5 Hz. Alternately, they are conformed to principal frequency having large amplitude within the range of 2-5 Hz respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for adjusting the frequency of a dynamic vibration absorber. More specifically, the frequency of the dynamic vibration absorber is reduced by a dynamic vibration absorber, which is a vibration damping device provided in a three-story house in which a steel frame body is formed of heavy steel frame H-shaped steel, so as to reduce traffic vibration. On how to do.

[0002]

2. Description of the Related Art There is a tendency that three-story houses for the purpose of two-generation and three-generation houses are constructed on narrow land in an urban area due to population density and rising land. Population crowding
The increase in construction work, the conversion of residential land around factories and offices, and the increase in traffic volume have caused vibration pollution. Vibration pollution originates mainly from construction work, factories, establishments and road traffic. These vibrations are transmitted to the building and may give a feeling of strangeness to the residents in the building. As a method of reducing vibration applied to a structure, Japanese Patent Application No. Hei 7-1878
40, a damping device is arranged between a foundation and a structure, and a vibration control is arranged on the roof of a building as disclosed in Japanese Patent Application No. 8-262419.

[0003]

Conventionally, three-story houses using a steel frame structure of the ramen method have been well known, but these are many families, such as condominiums and apartment houses. This is related to a building where residents live, and in the case of a single-family three-story house, the cost and the design and planning of a three-story house with a structure are necessary. The aforementioned Japanese Patent Application No. 7-1
With the technology shown in 87840, it is difficult to sufficiently remove vibration, and even if the load on the building due to the earthquake can be reduced,
It is difficult to adapt to vibration pollution such as traffic vibration.

Further, in the technique disclosed in Japanese Patent Application No. 8-262419, vibration control of a building having a large mass such as a building is performed. It does not mean that buildings with small masses are symmetrical. As described above, it is difficult for the conventional technology to construct a house in which a living space can be freely designed without being influenced by location conditions and a resident can live comfortably.

According to the present invention, by using a through-beam structure, the degree of freedom in the configuration inside the house is increased, and a house resistant to vibration is formed. And, it is intended to provide a house where residents can live comfortably regardless of the location conditions.

[0006]

The problem to be solved by the present invention is as described above. Next, a configuration for solving the problem will be described. Houses have different natural frequencies depending on the location conditions, shape, and interior of the house. When a dynamic vibration absorber is installed in a house, the vibration received by the dynamic vibration absorber differs depending on the position in the house. For this reason, it is difficult for a dynamic vibration absorber set to a constant natural frequency to sufficiently reduce vibration. In the present invention, the dynamic vibration absorber is arranged in consideration of the frame structure, shape, interior and the like of the house, and the natural frequency of the dynamic vibration absorber is adjusted according to the arrangement of the dynamic vibration absorber. Things. The method for adjusting the dynamic vibration absorber of the present invention will be described below. First, as described in claim 1, a dynamic vibration absorber, which is formed in a three-story house having a beam winning structure, having a frame structure formed of a steel frame structure, receives the vibration frequency of the ground and the vibration frequency at which the dynamic vibration absorber receives at the arrangement position. Adjust with.

According to a second aspect of the present invention, a dynamic vibration absorber, which is formed in a three-story house having a steel frame structure and a beam structure, is provided on a dynamic vibration absorber at a ground frequency and an arrangement position. Adjust according to the measured frequency.

According to a third aspect of the present invention, in the dynamic vibration absorber having a frame structure formed of a steel structure and arranged in a three-story house having a beam winning structure, the target frequency of the dynamic vibration absorber is 2 to 5 Hz.
Range.

According to a fourth aspect of the present invention, in the dynamic vibration absorber having a steel frame structure to form a skeleton and installed in a three-story house having a beam winning structure, the dynamic frequency of the dynamic vibration absorber is set to 2-5.
The frequency is matched to the frequency with the largest amplitude in the range of Hz, and the vibration is absorbed particularly for the frequency with the largest amplitude to reduce the vibration felt by the resident.

According to a fifth aspect of the present invention, a frame is constituted by a steel frame structure, and two or more dynamic vibration absorbers are arranged in a three-story house having a beam winning structure, and the natural vibration of the dynamic vibration absorber is provided. The numbers are made to correspond to the main frequencies having large amplitudes in the range of 2 to 5 Hz, respectively, to reduce the vibrations in a wide range of frequencies.

[0011]

Next, an embodiment of the present invention will be described. FIG. 1 is an overhead view showing the configuration of a three-story house, and FIG. 2 is a perspective view showing the structure of a through beam 1a of a house used in the present invention and a column / beam joint of a first floor column 12 and a second floor column 15. , FIG. 3 is a schematic diagram showing how to receive vibration of a house, FIG. 4 is a schematic diagram showing an operation configuration of a dynamic vibration absorber, FIG. 5 is a schematic diagram showing a vibration damping mechanism of the dynamic vibration absorber, and FIG. FIG. 7 is a schematic view showing a mounting configuration of a device, FIG. 7 is a perspective view showing a mounting configuration of a dynamic vibration absorber,
8 is a schematic diagram showing a configuration for detecting the frequency of the dynamic vibration absorber, FIG. 9 is a plan view showing an arrangement configuration of a vibration detector for detecting the frequency of the dynamic vibration absorber, and FIG. 10 is a vibration diagram of the dynamic vibration absorber. It is a figure which shows the effect of the vibration reduction by number adjustment.

1 and 2, a description will be given of a ramen construction method for a three-storey house used in the present invention. Foundation 2
A column 12 is erected on the column 5, and a through beam 1 a is fixed on the column 12. A pillar 15 is provided upright on the through beam 1a, and a through beam 1b is provided on the upper end of the pillar 15.
Is installed horizontally. Further, a column 16 is provided upright on the through beam 1b, and a through beam 1c is provided laterally at the upper end of the column 16. The ramen construction method for a three-storey house used in the present invention is shown in FIG.
The through beams 1a, 1b, and 1c are mainly used.
The first floor pillar 12, the second floor pillar 15, and the third floor pillar 16 are divided pillars mainly composed of the through beams 1a, 1b, and 1c, and have a structure that is joined to the upper and lower sides of the through beam 1a as shown in FIG. Therefore, there is a second story pillar 15 on the first story pillar 12, and a second story pillar 15
There is no need to have the third-floor pillar 16 above. Since the number of pillars required for each floor is determined, the number of dividing pillars can be reduced as going to the upper floor.

Next, a description will be given of a vibration-resistant configuration of a house used in the present invention. First, the vibration resistance characteristics of the beam winning structure will be described with reference to FIG. Unbalanced house 21
In b, when the building is subjected to vibration, the building is likely to be twisted. Since the torsion element is added to the vibration generated in this case, the component of the vibration increases, and the temporal change is complicated, and it is difficult to suppress the vibration. Also, the load on the house is large. In the house 21 having a beam winning structure, a necessary number of pillars are arranged on each floor, so that the house on each floor can be easily balanced. Since the columns are provided along the beams, the balance and rigidity in the horizontal direction are high, and it becomes easy to receive vibrations horizontally. Thereby, the vibration received by the house can be simplified, and the vibration can be easily suppressed. Also,
The load on the house can be reduced, and the durability of the house can be improved.

As shown in FIG. 4, a dynamic vibration absorber 26 is provided on the upper part of the house, and the vibration transmitted from the vibration source to the house via the ground by the dynamic vibration absorber is eliminated. is there. At this time, the dynamic vibration absorber is optimally adjusted for the shaking of the house. A mechanism for eliminating vibration by the dynamic vibration absorber 26 will be described. The house in the state shown in FIG.
When vibration is transmitted to the house as shown in FIG.
As shown in (c), the house starts to shake. When the house shakes, the shake is transmitted to the dynamic vibration absorber, and FIG.
As shown in FIG. 4, the dynamic vibration absorber gives the house an inertial force using the transmitted vibration, so that the vibration of the house can be eliminated as shown in FIG. 4 (e).

Next, the structure of the dynamic vibration absorber will be described. The dynamic vibration absorber generally includes an elastic member S, a damping member D, and a mass body M, and the coupling method is shown in FIG.
It is also possible to linearly connect the elastic member S, the damping member D, and the mass body M shown in FIG. Further, there is a method shown in FIG. 5B in which the elastic member S and the damping member D are connected in parallel and connected to the mass M. Also, in general, mass versus M
Is estimated to be one percent of the home. Moreover,
It is also possible to dispose two dynamic vibration absorbers for absorbing the vibration in one direction shown in FIGS. 5A and 5B to absorb the vibration in the front-rear and left-right directions. Alternatively, as shown in FIG.
A pair of elastic members S and a damping member D are connected to the two mass bodies M in the front-rear and left-right directions, respectively, and by one dynamic vibration absorber,
Vibration in the front, rear, left and right directions can also be absorbed. By using one mass body in which a pair of elastic members S and damping members D acting in the front-rear and left-right directions are connected, the arrangement space for the dynamic vibration absorber can be reduced, and the installation becomes easy. The present invention does not particularly specify a dynamic vibration absorber. The dynamic vibration absorber may be any device that can be arranged in a house and can efficiently absorb vibration such as traffic vibration.

Since the above-mentioned dynamic vibration absorber is generally constituted by an elastic member, a damping member and a mass body, it has a certain frequency characteristic. The frequency characteristic is a frequency at which the mass body is easily displaced, and can be adjusted by changing the characteristics (elastic coefficient, friction coefficient or viscosity) of the elastic member and the damping member. Further, the damping member converts vibration into thermal energy through frictional force or viscous resistance to reduce the vibration, so that a certain stroke is required for the damping member to operate. Also, a certain stroke is required to cancel the vibration by the inertial force generated in the mass body. Therefore, the vibration that is absorbed by the dynamic vibration absorber has a large period to some extent. The range of vibration pollution is generally 1-80H
Although it is assumed that the dynamic vibration absorber is in the range of z, any dynamic vibration absorber may be used as long as it corresponds to a frequency of 2 to 5 Hz that is easy for residents to feel. In this range, the vibration of the house is reduced by the dynamic vibration absorber.

Next, a method of adjusting the dynamic vibration absorber will be described. As shown in FIG. 6, the frequency of the dynamic vibration absorber 26 is measured in a state where the dynamic vibration absorber 26 is disposed above a house. For this reason, it is possible to detect the frequency in accordance with the location and configuration of the house. A method of detecting the frequency transmitted to the dynamic vibration absorber 26 will be described. Vibration is transmitted to the house H from the vibration source S via the ground. As shown in FIG. 6, vibration detectors 41 are arranged on the ground and the house H, and the vibration frequency transmitted from the ground and the dynamic vibration absorber 2 of the house, respectively.
The measurement of the frequency transmitted to the arrangement position of No. 6 is performed. Thereby, the frequency of the ground and the frequency of the house can be recognized. The vibration frequency differs depending on the ground, and the houses have various layouts according to the demands of the residents. For this reason, it is necessary to be able to adjust the frequency of the dynamic vibration absorber according to the location conditions and characteristics of each house. As a method of measuring vibration, a sensor is installed at a place where vibration is measured, and then the vibration is recognized.

Next, a method of measuring the frequency at the mounting portion of the dynamic vibration absorber will be described with reference to FIGS. 7, 8 and 9. The dynamic vibration absorber 26 is, as shown in FIG.
The vibration frequency received by the dynamic vibration absorber 26 is measured in a state where the vibration absorber 26 is disposed above the house H. The detection of the frequency is performed by the vibration detector 41.
As shown in FIG. 8, the vibration detector 41 includes a sensor 42, an amplifier 43, a recorder 44, and an analyzer 45. The sensor 42 is connected to the amplifier 43, and the signal of the sensor 42 amplified by the amplifier 43 is output to the analyzer 45 and recorded by the recorder 44. The frequency of the dynamic vibration absorber is adjusted based on the frequency thus detected.
The analyzer 45 is provided with a monitor, which allows the operator to recognize the frequency characteristics, and adjusts the dynamic vibration absorber 26 according to the frequency characteristics.

Since the frequency is measured in a state where the dynamic vibration absorber 26 is actually used, adjustment according to the frequency to be suppressed can be easily performed. Thereby, efficient suppression of vibration can be performed. As shown in FIGS. 8 and 9, the dynamic vibration absorber 2
Sensors 42 are arranged on the upper surface of 6. Sensor 4
Numerals 2 and 42 are for detecting vibrations generated in one direction, respectively.
6 is provided on the upper surface. Each of the two sensors 42 is oriented in a direction corresponding to the adjustment direction of the dynamic vibration absorber 26, and is capable of recognizing the frequency received by the dynamic vibration absorber 26 from that direction based on the measurement results of the sensors 42. . Adjustment of the dynamic vibration absorber is easily performed based on the frequency received by the dynamic vibration absorber 26. The above sensor 4
As 2, an accelerometer, a speedometer, and a displacement meter can be used as long as vibration can be measured on the dynamic vibration absorber 26.

As described above, the dynamic vibration absorber is configured such that the natural frequency can be adjusted by changing the spring constant or the like. Thereby, the dynamic vibration absorber can be adjusted according to the measured frequency characteristics of the house. The dynamic vibration absorber 26 suppresses vibration at a frequency of 2 to 5 Hz. In general, vibration pollution is considered to be vibration of 1 to 80 Hz. However, in a three-story house having a steel frame structure and a beam winning structure, the vibration is reduced in the range of 2 to 5 Hz so that the resident of the house can reduce the vibration. A comfortable living environment can be provided.

Next, a method of adjusting the frequency of the dynamic vibration absorber will be described. In FIG. 10, the natural frequency of the dynamic vibration absorber is adjusted according to the vibration characteristic N transmitted to the house, and the vibration transmitted to the house is reduced. Thus, the vibration transmitted to the house has the vibration characteristic R. First, FIG.
An embodiment of the method for adjusting the dynamic vibration absorber will be described with reference to FIG. In FIG. 10A,
The vibration characteristic N shows a particularly large vibration at a certain frequency (A1) in the range of 2 to 5 Hz. In this case, the natural frequency of the dynamic vibration absorber is A1. Thereby, the vibration at the frequency (A1) is reduced, and as shown in FIG. 10B, the vibration of the house can be reduced. That is, as shown in FIGS. 10 (a) and 10 (b), by making the natural frequency of the dynamic vibration absorber equal to the peak frequency of the vibration generated in the house, noticeable vibration can be eliminated. As described above, the dynamic vibration absorber can adjust the vibration characteristics by adjusting the spring coefficient and the damping coefficient. The peak frequency of the dynamic vibration absorber is mainly determined by the spring coefficient, and the spring coefficient can be adjusted by the type of the spring or the amount of tightening. As a result, it is possible to reduce the shaking occurring in the house, improve the livability of the house, reduce the load on the house, and improve the durability.

Next, another embodiment of the method of adjusting the dynamic vibration absorber will be described with reference to FIGS. 10 (c) and 10 (d). When the vibration characteristic has a plurality of peaks, it can be dealt with by a plurality of dynamic vibration absorbers. FIG. 10 (c)
, The vibration characteristic N indicates a large vibration at a frequency (A2 · A3 · A4) in the range of 2 to 5 Hz. In this case, the natural frequencies of the dynamic vibration absorber are A2, A3, and A4, respectively. As a result, vibrations at the frequencies (A2, A3, A4) are reduced, and FIG.
As shown in (d), the shaking of the house can be reduced. That is, as shown in FIGS. 10 (c) and 10 (d), by making the natural frequency of the dynamic vibration absorber equal to the peak frequency of the vibration generated in the house, a noticeable vibration can be eliminated. This reduces the shaking that occurs in the house, improves the livability of the house,
The load on the house can be reduced and the durability can be improved.

[0023]

According to the first aspect of the present invention, a dynamic vibration absorber arranged in a three-story house having a beam-winning structure, whose frame is constituted by a steel frame structure, receives the vibration characteristics of the ground and the dynamic vibration absorber in the arrangement position. Since the adjustment is performed according to the vibration characteristics, the dynamic vibration absorber can be adjusted according to the vibration characteristics of the ground on which the house is built and the individual houses. In addition, when a house is renovated, the dynamic vibration absorber can be adjusted efficiently by examining the vibration characteristics of the house.

According to a second aspect of the present invention, there is provided a dynamic vibration absorber having a steel frame structure as a skeleton and disposed in a three-story house having a beam winning structure, wherein a sensor is provided on the dynamic vibration absorber at the vibration characteristics and arrangement position of the ground. Is attached and adjusted according to the measured vibration characteristics, so that the vibration characteristics actually received by the dynamic vibration absorber can be detected. Thereby, the vibration characteristics of the dynamic vibration absorber can be adjusted, and the vibration can be efficiently reduced.

According to a third aspect of the present invention, there is provided a dynamic vibration absorber having a steel frame structure for a frame and disposed in a three-story house having a beam winning structure, wherein a target vibration characteristic of the dynamic vibration absorber is 2 to 5H.
With the range of z, vibration can be efficiently reduced in a three-story house with a beam winning structure, and vibrations felt by residents can be effectively reduced.

According to a fourth aspect of the present invention, in the dynamic vibration absorber having a steel frame structure to form a frame and arranged in a three-story house having a beam winning structure, the dynamic vibration absorber has a natural frequency of 2 to 5.
Since the frequency is set to be equal to the frequency having the largest amplitude in the range of Hz, the vibration can be effectively reduced in a house exhibiting strong shaking at a substantially constant frequency.

According to a fifth aspect of the present invention, a frame is constituted by a steel frame structure, and two or more dynamic vibration absorbers are disposed in a three-story house having a beam winning structure, and the natural vibration of the dynamic vibration absorber is provided. Since the number is made to correspond to the main frequency having a large amplitude in the range of 2 to 5 Hz, the vibration can be reduced in a house affected by the overall vibration of 2 to 5 Hz.

[Brief description of the drawings]

FIG. 1 is an overhead view showing a beam winning ramen method for a three-story house.

FIG. 2 shows a through beam 1a of a house used in the present invention and a first floor column 1
The perspective view which shows the structure of the column / beam joint part of the part of 2nd and 2nd-floor columns 15.

FIG. 3 is a schematic diagram showing how to receive vibration of a house.

FIG. 4 is a schematic view showing a vibration damping mechanism of a house.

FIG. 5 is a schematic diagram showing a configuration of a dynamic vibration absorber.

FIG. 6 is a schematic diagram showing a mounting configuration of a vibration detector.

FIG. 7 is a perspective view showing a mounting configuration of a dynamic vibration absorber.

FIG. 8 is a schematic diagram showing a configuration for detecting vibration characteristics of a dynamic vibration absorber.

FIG. 9 is a plan view showing an arrangement configuration of a vibration detector for detecting vibration characteristics of the dynamic vibration absorber.

FIG. 10 is a diagram showing the effect of reducing vibration by adjusting the vibration characteristics of the dynamic vibration absorber.

[Explanation of symbols]

 26 Dynamic vibration absorber 42 Sensor 43 Amplifier 44 Recorder 45 Analyzer

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Claims (5)

[Claims] The present invention relates to a dynamic vibration absorber arranged in a three-story house having a beam winning structure in which a frame is constituted by a steel frame structure, and the dynamic vibration absorber is adjusted according to the vibration frequency of the ground and the vibration frequency of the dynamic vibration absorber at an arrangement position. A method for adjusting a dynamic vibration absorber. 2. A vibration damper having a frame structure formed of a steel structure and installed in a three-story house having a beam winning structure, wherein a vibration is measured by attaching a sensor to the vibration damper at the ground frequency and the position of the ground. A method for adjusting a dynamic vibration absorber, characterized in that the adjustment is performed by: 3. A dynamic vibration absorber having a frame structure formed of a steel structure and arranged in a three-story house having a beam winning structure, wherein a target frequency of the dynamic vibration absorber is in a range of 2 to 5 Hz. How to adjust the dynamic vibration absorber. 4. A dynamic vibration absorber having a frame structure formed of a steel structure and disposed in a three-story house having a beam-winning structure, wherein the natural frequency of the dynamic vibration absorber is set to the maximum amplitude within a range of 2 to 5 Hz. A method for adjusting a dynamic vibration absorber, wherein the frequency is adjusted to a large frequency. 5. A three-story house having a beam-winning structure, wherein a skeleton is formed by a steel structure, and two or more dynamic vibration absorbers are arranged. The natural frequency of the dynamic vibration absorber is 2 to 5 Hz. A dynamic vibration absorber adjustment method, wherein the main vibration frequency is made to coincide with a major frequency having a large amplitude within the range.