JPH0765634B2 - Vibration control device - Google Patents
Vibration control deviceInfo
- Publication number
- JPH0765634B2 JPH0765634B2 JP1093590A JP9359089A JPH0765634B2 JP H0765634 B2 JPH0765634 B2 JP H0765634B2 JP 1093590 A JP1093590 A JP 1093590A JP 9359089 A JP9359089 A JP 9359089A JP H0765634 B2 JPH0765634 B2 JP H0765634B2
- Authority
- JP
- Japan
- Prior art keywords
- tank
- directions
- vibration
- damping
- liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Vibration Prevention Devices (AREA)
Description
【発明の詳細な説明】 （ａ）．産業上の利用分野 本発明は、地震や風等で建物等の構造物に生じる振動を
減衰させる際に用いるに好適な制振装置に関する。DETAILED DESCRIPTION OF THE INVENTION (a). BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration damping device suitable for attenuating vibration generated in a structure such as a building due to an earthquake or wind.
（ｂ）．従来の技術 最近、構造部の上部に、該構造物の固有振動数に一致し
た揺動周波数を有する水等の液体を貯溜したタンクから
なる制振装置を設置し、構造物に生じる振動を該タンク
内の液体の波動エネルギで吸収せんとする提案がなされ
ている。(B). 2. Description of the Related Art Recently, a vibration damping device including a tank that stores a liquid such as water having a rocking frequency matching the natural frequency of the structure is installed on the upper part of the structure, and vibration generated in the structure is Proposals have been made to absorb the wave energy of the liquid in the tank.
（ｃ）．発明が解決すべき問題点 しかし、こうした制振装置は、その制振方向が通常１方
向であり、水平な直角２方向の振動を吸収することはで
きなかった。(C). Problems to be Solved by the Invention However, such a vibration damping device usually has only one damping direction, and cannot absorb vibrations in two horizontal right angles.
また、特開平１−312175には、直交する水平２方向のタ
ンク寸法を、該方向において制振すべき振動周波数に対
応した波動が前記液体に生じるように設定した制振装置
が提案されているが、こうした装置においては、波動が
必要以上に生じないように適宜な減衰手段を設ける必要
が有る。しかし、タンク内においては、波動が２方向に
生じるので、単純に減衰手段をタンク内に設けると、波
動をその方向とは無関係に減衰することとなる。これで
は、構造物の振動モードに適合させた形で直交２方向の
振動を互いに独立した形で減衰させることが出来ず、直
交する各方向に最適な減衰性能を付与することが困難と
なり、高性能な制振装置を得ることは出来ない。Further, Japanese Patent Application Laid-Open No. 1-312175 proposes a vibration damping device in which tank dimensions in two orthogonal horizontal directions are set so that a vibration corresponding to a vibration frequency to be damped in the directions is generated in the liquid. However, in such a device, it is necessary to provide an appropriate damping means so as to prevent unnecessary wave generation. However, in the tank, waves are generated in two directions. Therefore, if the damping means is simply provided in the tank, the waves are damped regardless of their directions. With this, vibrations in two orthogonal directions cannot be independently damped in a form adapted to the vibration mode of the structure, and it becomes difficult to provide optimum damping performance in each orthogonal direction. It is not possible to obtain a high performance vibration damping device.
本発明は、前述の欠点を解消すべく、水平な直角２方向
の振動の吸収が可能なばかりか、その減衰性能を各方向
について、他の方向の減衰性能に影響を極力与えること
なく独立した形で付与することが出来る制振装置を提供
することを目的とするものである。In order to solve the above-mentioned drawbacks, the present invention is capable of absorbing vibrations in two horizontal directions at right angles, and independent of the damping performance in each direction without affecting the damping performance in the other directions as much as possible. The purpose of the present invention is to provide a vibration damping device that can be applied in the form.
（ｄ）．問題点を解決するための手段 即ち、本発明は、タンク（３）を有し、該タンク（３）
の内部に開放液面（7a）を有する形で液体（７）を貯溜
した制振装置（２）において、矢印Ａ、Ｂ及びＣ、Ｄ方
向等の直交する水平２方向のタンク寸法（L1、L2）を、
該方向において制振すべき振動周波数に対応した波動が
前記液体（７）に生じるように設定し、前記タンク内に
メッシュからなる複数の減衰材（５、６）を前記水平２
方に、互いに直交する形で設置すると共に、その設置密
度を前記タンク中央部よりも周辺部において高く設定し
て構成される。(D). Means for Solving the Problems That is, the present invention has a tank (3), and the tank (3)
In the vibration damping device (2) that stores the liquid (7) in the form of having an open liquid surface (7a) inside the tank, tank dimensions (L1, L1 L2)
Waves corresponding to the vibration frequency to be damped in this direction are set so as to occur in the liquid (7), and a plurality of attenuating members (5, 6) made of mesh are provided in the tank in the horizontal 2
On the other hand, they are installed in a mutually orthogonal form, and the installation density is set higher in the peripheral portion than in the central portion of the tank.
なお、括弧内の番号などは、図面における対応する要素
を示す、適宜的なものであり、従って、本記述は図面上
の記載に限定されるものでは無い。以下の、「（ｅ）．
作用」の欄についても同様である。It should be noted that the numbers in parentheses and the like indicate the corresponding elements in the drawings as appropriate, and therefore the present description is not limited to the description in the drawings. The following "(e).
The same applies to the column of "action".
（ｅ）．作用 上記した構成により、本発明は、タンク（３）内で液体
（７）は直交する２方向に波動するように作用する。(E). Action With the above-described configuration, the present invention acts so that the liquid (7) oscillates in the two orthogonal directions within the tank (3).
また、本発明はメッシュからなる減衰材（５、６）がタ
ンク内の水平２方向の波動に対して選択的に減衰作用を
発揮するように作用する。Further, according to the present invention, the damping material (5, 6) made of a mesh acts so as to selectively exert a damping action on horizontal two-direction wave motion in the tank.
（ｆ）．実施例 以下、本発明の実施例を図面に基づき説明する。(F). Embodiment An embodiment of the present invention will be described below with reference to the drawings.
第１図は本発明による制振装置の１実施例を示す平面図
である。FIG. 1 is a plan view showing an embodiment of a vibration damping device according to the present invention.
構造物１の上部の屋上や機械室などには、第１図に示す
ように、本発明による制振装置２が配置されており、制
振装置２は、第１図に示すように、タンク３を有してい
る。タンク３は平面形状が、矢印Ａ、Ｂ方向の寸法がL1
に形成されており、矢印Ａ、Ｂ方向に対して直角な方向
である矢印Ｃ、Ｄ方向の寸法はL2に形成され、全体的に
四角形状に形成されている。また、タンク３にはメッシ
ュからなる減衰材５、６が、矢印Ａ、Ｂ及びＣ、Ｄ方向
に所定の間隔で設置されており、タンク３内には水等の
液体７が開放液面7aを形成する形で注入されている。ま
た、減衰材５、６の設置密度は、タンク３中央部よりも
周辺部において高くなるように設定されている。As shown in FIG. 1, a vibration damping device 2 according to the present invention is arranged on a rooftop or a machine room above the structure 1, and the vibration damping device 2 is a tank as shown in FIG. Have three. The tank 3 has a planar shape, and the dimension in the directions of arrows A and B is L1.
Is formed, and the dimension in the directions of arrows C and D, which is a direction perpendicular to the directions of arrows A and B, is L2, and is formed in a quadrangle shape as a whole. Further, damping materials 5 and 6 made of mesh are installed in the tank 3 at predetermined intervals in the directions of arrows A, B and C, D, and a liquid 7 such as water is opened in the tank 3 at an open liquid level 7a. Is injected in the form of. Further, the installation density of the damping materials 5 and 6 is set to be higher in the peripheral portion than in the central portion of the tank 3.
制振装置２は、以上のような構成を有するので、通常の
状態では構造物１に振動は生じないので、タンク３内に
貯溜された液体７の液面7aは、水平状態、即ち図中紙面
と平行な状態に保持される。次に、地震や風等で構造物
１が水平方向である矢印Ａ、Ｂ方向に振動したとする
と、構造物１の振動に同期する形でタンク３も矢印Ａ、
Ｂ方向に振動する。タンク３の矢印Ａ、Ｂ方向の寸法L1
は、構造物１の矢印Ａ、Ｂ方向の固有振動数に一致した
波動周波数で液体７の波動が行なわれるように設定され
ているので、液体７の波動は矢印Ａ、Ｂ方向に容易に生
じる。また、矢印Ａ、Ｂ方向に生じた波動は、矢印Ａ、
Ｂ方向に直角な方向に設置された減衰材５により減衰さ
れ、制振装置２に有効な減衰性を付与することが出来
る。この際、波動の方向と平行な矢印Ａ、Ｂ方向に設置
された減衰材６は、その設置方向が波動の方向と一致
し、かつ減衰材がメッシュから形成されているので、減
衰材６は矢印Ａ、Ｂ方向に直角なＣ、Ｄ方向の波動に対
してのみ有効に作用し、該メッシュの張設方向である矢
印Ａ、Ｂ方向の波動に対しては有効に作用しない。従っ
て、矢印Ａ、Ｂ方向波動は、減衰材５にのみ有効に減衰
されることとなる。Since the vibration damping device 2 has the above-described configuration, vibration does not occur in the structure 1 in a normal state, so that the liquid surface 7a of the liquid 7 stored in the tank 3 is in a horizontal state, that is, in the figure. It is held parallel to the page. Next, assuming that the structure 1 vibrates in the horizontal directions A and B due to an earthquake or wind, the tank 3 also synchronizes with the vibration of the structure 1 by the arrow A and B.
It vibrates in the B direction. Dimension L1 of tank 3 in the directions of arrows A and B
Is set so that the wave of the liquid 7 is performed at a wave frequency that matches the natural frequency of the structure 1 in the directions of the arrows A and B, so that the wave of the liquid 7 easily occurs in the directions of arrows A and B. . In addition, the waves generated in the directions of arrows A and B are
It is damped by the damping material 5 installed in the direction perpendicular to the B direction, so that the damping device 2 can be provided with effective damping properties. At this time, the damping material 6 installed in the directions of arrows A and B parallel to the direction of the wave motion has the same installation direction as the direction of the wave motion and is formed of a mesh. It effectively acts only on the waves in the directions C and D perpendicular to the directions of the arrows A and B, and does not act effectively on the waves in the directions A and B, which are the directions in which the mesh is stretched. Therefore, the waves in the directions A and B are effectively damped only by the damping material 5.
また、減衰材５の設置密度は、波動による開放液面の変
動が余り生じることのないタンクの矢印Ａ、Ｂ方向中央
部よりも、変動が大きく生じるタンク周辺部において高
く設定されているので、減衰材５の減衰性能を有効に発
揮させることが出来、少ない枚数の減衰材で済み、制振
装置の重量を軽量化することが可能となる。Further, since the installation density of the damping material 5 is set higher in the peripheral portion of the tank where the fluctuation is greater than in the central portion in the direction of arrows A and B of the tank where the fluctuation of the open liquid level due to the wave hardly occurs. The damping performance of the damping material 5 can be effectively exhibited, a small number of damping materials are required, and the weight of the vibration damping device can be reduced.
また、構造物１が矢印Ａ、Ｂ方向とは直角な水平方向で
ある矢印Ｃ、Ｄ方向に振動したとすると、構造物１の振
動に同期する形でタンク３も矢印Ｃ、Ｄ方向に振動す
る。タンク３の矢印Ｃ、Ｄ方向の寸法L2は、構造物１の
矢印Ｃ、Ｄ方向の固有振動数に一致した波動周波数で液
体７の波動が行なわれるように設定されているので、液
体７の波動は矢印Ｃ、Ｄ方向に容易に生じる。また、矢
印Ｃ、Ｄ方向に生じた波動は、矢印Ｃ、Ｄ方向に直角な
方向に設置された減衰材６により減衰され、制振装置２
に有効な減衰性を付与することが出来る。この際、波動
の方向と平行な矢印Ｃ、Ｄ方向に設置された減衰材５
は、その設置方向が波動の方向と一致し、かつ減衰材が
メッシュから形成されているので、減衰材５は矢印Ｃ、
Ｄ方向に直角なＡ、Ｂ方向の波動に対してのみ有効に作
用し、該メッシュの張設方向である矢印Ｃ、Ｄ方向の波
動に対しては有効に作用しない。従って、矢印Ｃ、Ｄ方
向波動は、減衰材６にのみ有効に減衰されることとな
る。Further, assuming that the structure 1 vibrates in the horizontal directions C and D that are perpendicular to the directions A and B, the tank 3 also vibrates in the directions C and D in synchronization with the vibration of the structure 1. To do. The dimension L2 of the tank 3 in the directions of the arrows C and D is set so that the vibration of the liquid 7 is performed at the wave frequency that matches the natural frequency of the structure 1 in the directions of the arrows C and D. Waves easily occur in the directions of arrows C and D. Further, the waves generated in the directions of the arrows C and D are damped by the damping material 6 installed in the direction perpendicular to the directions of the arrows C and D, and the vibration damping device 2
It is possible to give effective damping property to the. At this time, the damping material 5 installed in the arrow C and D directions parallel to the wave direction.
Has its installation direction coincident with the direction of the wave and the damping material is formed of a mesh, so that the damping material 5 has an arrow C,
It effectively acts only on the waves in the A and B directions orthogonal to the D direction, and does not act effectively on the waves in the directions of the arrows C and D, which are the directions in which the mesh is stretched. Therefore, the waves in the C and D directions are effectively damped only by the damping material 6.
また、減衰材６の設置密度も、波動による開放液面の変
動があまり生じることのないタンクの矢印Ｃ、Ｄ方向中
央部よりも、変動が大きく生じるタンク周辺部において
高く設定されているので、減衰材６の減衰性能を有効に
発揮させることが出来、少ない枚数の減衰材で済み、制
振装置の重量を軽量化することが可能となる。Further, the installation density of the damping material 6 is also set higher in the peripheral portion of the tank where the fluctuation is greater than in the central portion in the arrow C and D direction of the tank where the fluctuation of the open liquid level due to the wave does not occur much. The damping performance of the damping material 6 can be effectively exhibited, a small number of damping materials are required, and the weight of the vibration damping device can be reduced.
（ｇ）．発明の効果 以上説明したように本発明によれば、タンク３を有し、
該タンク３の内部に開放液面7aを有する形で液体７を貯
溜した制振装置２において、矢印Ａ、Ｂ及びＣ、Ｄ方向
等の直交する水平２方向のタンク寸法L1、L2を、該方向
において制振すべき振動周波数に対応した波動が前記液
体７に生じるように設定し、前記タンク内にメッシュか
らなる複数の減衰材５、６を前記水平２方に、互いに直
交する形で設置すると共に、その設置密度を前記タンク
中央部よりも周辺部において高く設定して構成したの
で、一つのタンク３で直交する２方向の振動の吸収が可
能となる。また、減衰材がメッシュから構成されるの
で、減衰材は自らの張設方向に直角な方向の波動にのみ
有効に作用し、自らの張設方向とは平行な方向の波動に
は有効に作用しない。従って、タンクに生じる直交２方
向の波動に対する減衰性能を、他の方向の減衰性能に影
響を極力与えることなくその波動方向毎に独立した形で
設定することが容易となり、高度の制振性を付与するこ
とが出来る。(G). As described above, according to the present invention, the tank 3 is provided,
In the vibration damping device 2 in which the liquid 7 is stored so as to have the open liquid surface 7a inside the tank 3, the tank dimensions L1 and L2 in the two horizontal directions orthogonal to the directions of arrows A, B and C and D are Is set so that a wave corresponding to the vibration frequency to be damped in the direction is generated in the liquid 7, and a plurality of attenuating members 5 and 6 made of mesh are installed in the tank in the two horizontal directions in a manner orthogonal to each other. In addition, since the installation density is set higher in the peripheral portion than in the central portion of the tank, it is possible for one tank 3 to absorb vibration in two directions orthogonal to each other. Also, since the damping material is composed of a mesh, the damping material acts effectively only on waves in the direction perpendicular to the direction in which it is stretched, and effectively in waves parallel to the direction in which it is stretched. do not do. Therefore, it becomes easy to set the damping performance for the waves in the two orthogonal directions generated in the tank independently for each wave direction without affecting the damping performance in the other directions as much as possible, and a high degree of vibration damping performance is achieved. Can be given.
更に、減衰材の設置密度を前記タンク中央部よりも周辺
部において高く設定して構成したので、波動による開放
液面の変動が余り生じることのないタンクの中央部より
も、変動が大きく生じるタンク周辺部において高く設定
されることとなり、減衰材の減衰性能を有効に発揮させ
ることが出来、少ない枚数の減衰材で済み、制振装置の
重量を軽量化することが可能となる。Further, since the installation density of the damping material is set to be higher in the peripheral portion than in the central portion of the tank, the tank in which the fluctuation is greater than in the central portion of the tank where the fluctuation of the open liquid level due to the wave hardly occurs Since it is set high in the peripheral portion, the damping performance of the damping material can be effectively exhibited, a small number of damping materials are required, and the weight of the vibration damping device can be reduced.
第１図は本発明による制振装置の１実施例を示す平面図
である。 ２……制振装置 ３……タンク ５、６……減衰材 ７……液体 7a……液面 L1,L2……寸法FIG. 1 is a plan view showing an embodiment of a vibration damping device according to the present invention. 2 …… Vibration suppressor 3 …… Tank 5,6 …… Dampening material 7 …… Liquid 7a …… Liquid level L1, L2 …… Dimensions
Claims (1)
を有する形で液体を貯溜した制振装置において、 直交する水平２方向のタンク寸法を、該方向において制
振すべき振動周波数に対応した波動が前記液体に生じる
ように設定し、 前記タンク内にメッシュからなる複数の減衰材を前記水
平２方向に、互いに直交する形で設置すると共に、その
設置密度を前記タンク中央部よりも周辺部において高く
設定して構成した制振装置。1. A vibration damping device having a tank and storing liquid in a form having an open liquid level inside the tank, wherein tank dimensions in two horizontal directions orthogonal to each other are vibration frequencies at which vibrations are to be damped. Is set so that a wave corresponding to the above is generated in the liquid, a plurality of attenuating materials made of mesh are installed in the tank in the two horizontal directions so as to be orthogonal to each other, and the installation density is from the central part of the tank. A vibration control device that is configured with a high setting in the peripheral area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1093590A JPH0765634B2 (en) | 1989-04-13 | 1989-04-13 | Vibration control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1093590A JPH0765634B2 (en) | 1989-04-13 | 1989-04-13 | Vibration control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02271132A JPH02271132A (en) | 1990-11-06 |
| JPH0765634B2 true JPH0765634B2 (en) | 1995-07-19 |
Family
ID=14086515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1093590A Expired - Lifetime JPH0765634B2 (en) | 1989-04-13 | 1989-04-13 | Vibration control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0765634B2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2729233B2 (en) * | 1988-06-09 | 1998-03-18 | 清水建設株式会社 | Vibration suppression device for structures |
-
1989
- 1989-04-13 JP JP1093590A patent/JPH0765634B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02271132A (en) | 1990-11-06 |
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