JP2000081080A - U-shaped vibration damping device of fluid type and method thereof - Google Patents
U-shaped vibration damping device of fluid type and method thereofInfo
- Publication number
- JP2000081080A JP2000081080A JP10279628A JP27962898A JP2000081080A JP 2000081080 A JP2000081080 A JP 2000081080A JP 10279628 A JP10279628 A JP 10279628A JP 27962898 A JP27962898 A JP 27962898A JP 2000081080 A JP2000081080 A JP 2000081080A
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- Japan
- Prior art keywords
- fluid
- shaped
- vertical portion
- damping device
- vibration damping
- 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.)
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、流体を使用した塔
状構造物の制振装置及びその方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for damping a tower-like structure using a fluid.
【０００２】[0002]
【従来の技術】図１２に、従来のＵ字型流体式制振装置
の基本構造を示す。図１２中、符号１はＵ字型タンク、
２は水平部、３，４は鉛直部、５は流体を各々図示す
る。2. Description of the Related Art FIG. 12 shows a basic structure of a conventional U-shaped fluid type vibration damping device. In FIG. 12, reference numeral 1 denotes a U-shaped tank,
2 indicates a horizontal portion, 3 and 4 indicate a vertical portion, and 5 indicates a fluid.
【０００３】図１２に示すように、水平部２とその両端
に連結された鉛直部３，４とからなるＵ字型タンク１の
中には、流体５として例えば水が充填されている。前記
鉛直部３，４は、制振対象構造物の振動数に応じて、大
気に開放された状態、密封された状態、上部空気室を加
圧した状態のいずれかを選択して使用される。流体５が
揺動する時の振動数ｆは、鉛直部が大気開放時の場合、
次式「数１」で表現される。As shown in FIG. 12, a U-shaped tank 1 comprising a horizontal portion 2 and vertical portions 3 and 4 connected to both ends thereof is filled with a fluid 5 such as water. The vertical portions 3 and 4 are used by selecting one of a state opened to the atmosphere, a sealed state, and a state in which the upper air chamber is pressurized according to the frequency of the structure to be damped. . The frequency f when the fluid 5 oscillates is as follows when the vertical portion is open to the atmosphere.
It is expressed by the following equation (Equation 1).
【０００４】[0004]
【数１】 ここで、ｆは振動数、Ｇは動力加速度、Ｌは流体流路の
等価長さをそれぞれ示している。(Equation 1) Here, f indicates the frequency, G indicates the power acceleration, and L indicates the equivalent length of the fluid channel.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、制振対
象となる構造物の振動数が低い場合、この振動数に合わ
せて流体５の振動数ｆを低くするためには、前記式
（１）から明らかなように、流量体流路の等価長さＬを
大きくする必要がある。すなわち、一般的には、流体５
が揺動する流路である水平部２及び鉛直部３，４を長く
して対応することになるが、このように流体流路を長く
することは、Ｕ字型タンク１が大型化してしまい、制振
装置の設置スペースが広くなるなど、製作及び設置施工
に要するコストが増加する方向となる、という問題があ
る。However, when the frequency of the structure to be damped is low, the frequency f of the fluid 5 must be reduced in accordance with the above equation (1) in order to lower the frequency f of the fluid 5 in accordance with this frequency. As is apparent, it is necessary to increase the equivalent length L of the flow path. That is, generally, the fluid 5
The horizontal part 2 and the vertical parts 3 and 4 which are the flow paths in which the fluid oscillates are lengthened. However, increasing the fluid flow path in this way increases the size of the U-shaped tank 1. In addition, there is a problem that the cost required for the production and installation work tends to increase, for example, the installation space of the vibration damping device is widened.
【０００６】以上の問題に鑑み、本発明は、Ｕ字型タン
クを大型化することなく流体流路の等価長さＬを長くす
ることを可能とするＵ字型流体式制振装置及びその方法
を提供することを目的とする。[0006] In view of the above problems, the present invention provides a U-shaped fluid type vibration damping device and a method thereof capable of increasing the equivalent length L of the fluid flow path without increasing the size of the U-shaped tank. The purpose is to provide.
【０００７】[0007]
【課題を解決するための手段】前述した課題を解決する
［請求項１］の発明は、水平部とその両端に連結された
鉛直部とよりなるＵ字型タンクに流体が入れられ、該流
体が交互に移動する周期を対象構造物の振動数に一致さ
せてその振動を制振するＵ字型流体式制振装置におい
て、前記Ｕ字型タンクの鉛直部に一部断面積の狭い部分
を設けたことを特徴とする。According to a first aspect of the present invention, a fluid is placed in a U-shaped tank having a horizontal portion and a vertical portion connected to both ends thereof. In a U-shaped fluid type vibration damping device that damps the vibration by matching the cycle of alternately moving to the frequency of the target structure, a part having a small cross-sectional area is partially added to the vertical portion of the U-shaped tank. It is characterized by having been provided.
【０００８】［請求項２］の発明は、請求項１におい
て、前記鉛直部に充填材又は突起物を取り付けて断面積
を狭めたことを特徴とする。A second aspect of the present invention is characterized in that, in the first aspect, a cross-sectional area is reduced by attaching a filler or a protrusion to the vertical portion.
【０００９】［請求項３］の発明は、請求項１におい
て、前記鉛直部に可動式板を設けて断面積を可変とした
ことを特徴とする。A third aspect of the present invention is characterized in that, in the first aspect, a movable plate is provided in the vertical portion so that a cross-sectional area is variable.
【００１０】［請求項４］の発明は、請求項１におい
て、前記鉛直部を複数の流路に分割し、該分割された流
路内の一部に充填材を充填してなることを特徴とする。According to a fourth aspect of the present invention, in the first aspect, the vertical portion is divided into a plurality of flow paths, and a part of the divided flow paths is filled with a filler. And
【００１１】［請求項５］の発明は、請求項１におい
て、前記鉛直部の少なくとも上下二箇所に複数の開口を
有する板状体を鉛直方向と直交する方向に配設してなる
ことを特徴とする。According to a fifth aspect of the present invention, in the first aspect, a plate-like body having a plurality of openings at least at two positions above and below the vertical portion is disposed in a direction orthogonal to the vertical direction. And
【００１２】［請求項６］の発明は、請求項１乃至５に
おいて、前記鉛直部の流体が流通する流路の内部に減衰
材を挿入してなることを特徴とする。[0012] The invention of claim 6 is characterized in that, in any of claims 1 to 5, an attenuating material is inserted into a flow passage through which the fluid in the vertical portion flows.
【００１３】［請求項７］の発明は、請求項１におい
て、前記鉛直部の少なくとも上下二箇所に流路を任意に
閉塞する流路閉塞手段を設けてなることを特徴とする。According to a seventh aspect of the present invention, in the first aspect, a flow path closing means for arbitrarily closing a flow path is provided at at least two positions above and below the vertical portion.
【００１４】［請求項８］の発明は、水平部とその両端
に連結された鉛直部とよりなるＵ字型タンクに流体が入
れられ、該流体が交互に移動する周期を対象構造物の振
動数に一致させてその振動を制振するＵ字型流体式制振
方法において、前記Ｕ字型タンクの鉛直部に一部断面積
の狭い部分を設け、鉛直部の等価長さを調整することを
特徴とする。According to the invention of claim 8, the fluid is put in a U-shaped tank consisting of a horizontal portion and a vertical portion connected to both ends thereof, and the fluid moves alternately with the vibration of the object structure. In a U-shaped fluid type vibration damping method for damping the vibration in accordance with the number, a part having a small cross-sectional area is provided in a vertical part of the U-shaped tank, and an equivalent length of the vertical part is adjusted. It is characterized by.
【００１５】[0015]
【発明の実施の形態】本発明によるＵ字型流体式制振装
置の実施の形態を以下に説明するが、本発明はこれらの
実施の形態に限定されるものではない。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a U-shaped fluid type vibration damping device according to the present invention will be described below, but the present invention is not limited to these embodiments.
【００１６】［第１の実施の形態］図１にＵ字型流体式
制振装置の概略図を示す。図１中、符号符号１はＵ字型
タンク、２は水平部、３，４は鉛直部、５は流体、６は
支持材及び７は充填材を各々図示する。図１に示すよう
に、本実施の形態のＵ字型流体式制振装置の基本的な構
造は、前述した従来構造の装置と同様であり、水平部２
とその両端に鉛直部３，４が連結されたＵ字型タンク１
内には、流体５として例えば水が封じ込められている。
水平部と連通する鉛直部３，４の壁面の一部には、充填
材７を支持保持するための支持材を設けており、該充填
材７の存在により、鉛直部３，４の断面積の一部を小さ
くした構造となっている。よって、鉛直部３，４の一部
断面積が狭まることによって、後述する等価長さＬが長
くなり、流体がゆっくり流れるようになり、流体が交互
に揺動する周期が長くなる。[First Embodiment] FIG. 1 is a schematic view of a U-shaped fluid type vibration damping device. In FIG. 1, reference numeral 1 denotes a U-shaped tank, 2 denotes a horizontal portion, 3 and 4 denote vertical portions, 5 denotes a fluid, 6 denotes a support material, and 7 denotes a filler. As shown in FIG. 1, the basic structure of the U-shaped fluid type vibration damping device of the present embodiment is the same as that of the above-described device of the conventional structure.
And a U-shaped tank 1 having vertical portions 3 and 4 connected to both ends thereof
Inside, for example, water is sealed as the fluid 5.
A support member for supporting and holding the filler 7 is provided on a part of the wall surface of the vertical portions 3 and 4 communicating with the horizontal portion, and the cross-sectional area of the vertical portions 3 and 4 is provided by the presence of the filler 7. Has a small structure. Therefore, when the partial cross-sectional areas of the vertical portions 3 and 4 are reduced, the equivalent length L described later is increased, the fluid flows slowly, and the period in which the fluid alternately swings is increased.
【００１７】本実施の形態によれば、充填材７の取付け
により鉛直部の断面積を容易に狭めることができる。よ
って、塔状構造物の振動数の適用範囲外になった場合に
おいても、鉛直部に前記充填材７を設置することで容易
に振動数の適用範囲内に調整することが可能となる。な
お、前記充填材７を設置する場所を鉛直部としたのは、
水平部における流体を除去する必要がないからであり、
鉛直部の少なくとも一部の断面積を可変とすることで構
造物を制振する場合の振動数の調整を図るようにしてい
る。なお、本発明においても前記鉛直部３，４は、制振
対象構造物の振動数に応じて、大気に開放された状態、
密封された状態、上部空気室を加圧した状態のいずれか
を選択して使用される。According to the present embodiment, the cross-sectional area of the vertical portion can be easily reduced by attaching the filler 7. Therefore, even when the frequency falls outside the applicable range of the frequency of the tower-like structure, it is possible to easily adjust the frequency within the applicable range by installing the filler 7 in the vertical portion. In addition, the place where the filler 7 is installed is a vertical part,
Because it is not necessary to remove the fluid in the horizontal part,
By making the cross-sectional area of at least a part of the vertical portion variable, the frequency at the time of damping the structure is adjusted. In the present invention, the vertical portions 3 and 4 are open to the atmosphere according to the frequency of the target structure,
One of a sealed state and a state in which the upper air chamber is pressurized is selected and used.
【００１８】［第２の実施の形態］図１に示した実施の
形態では充填材７を取り付けて鉛直部３，４の断面積を
一部狭めているが、第２の実施の形態では、図２に示す
ように、充填材７に代えて突起物１０を取り付けるよう
にしてもよい。前記突起物１０は、鉛直部３，４の断面
積を狭めることが設置の目的であるから、内部は空洞で
もよいし、或いは流体が入っていてもよい。[Second Embodiment] In the embodiment shown in FIG. 1, the filler 7 is attached to partially reduce the cross-sectional area of the vertical portions 3 and 4. However, in the second embodiment, As shown in FIG. 2, a projection 10 may be attached instead of the filler 7. The purpose of the projection 10 is to reduce the cross-sectional area of the vertical portions 3 and 4. Therefore, the interior of the projection 10 may be hollow or may contain a fluid.
【００１９】本実施の形態によれば、突起物１０の取付
けにより鉛直部の断面積を容易に狭めることができる。According to the present embodiment, the cross-sectional area of the vertical portion can be easily reduced by attaching the projection 10.
【００２０】［第３の実施の形態］図１に示した実施の
形態では充填材７を取り付けて鉛直部３，４の断面積を
一部狭めているが、第３の実施の形態では、図３に示す
ように、鉛直部３，４の側壁にそれぞれ鉛直方向と直交
する水平方向に移動可能な可動式側板８ａ，８ｂを設け
るようにしてもよい。この可動式側板８ａ，８ｂは、駆
動装置９ａ，９ｂにより任意の位置にセッティング可能
な構造としている。Third Embodiment In the embodiment shown in FIG. 1, the cross-sectional area of the vertical portions 3 and 4 is partially reduced by attaching the filler 7, but in the third embodiment, As shown in FIG. 3, movable side plates 8a and 8b which can be moved in the horizontal direction orthogonal to the vertical direction may be provided on the side walls of the vertical portions 3 and 4, respectively. The movable side plates 8a and 8b have a structure that can be set at an arbitrary position by driving devices 9a and 9b.
【００２１】本実施の形態によれば、可動式側板８ａ，
８ｂを例えば駆動装置９ａ，９ｂ等により任意の位置に
可動することができるので、流体５の揺動周期を容易に
調整することができる。According to the present embodiment, the movable side plates 8a,
8b can be moved to an arbitrary position by, for example, the driving devices 9a and 9b, so that the oscillation cycle of the fluid 5 can be easily adjusted.
【００２２】前述した構成によれば従来のものと同様
に、Ｕ字型に封じ込められた流体が交互に移動する周期
（振動数）を対象構造の振動数に一致させて、動吸振作
用により制振される。そして、制振対象構造物の振動数
が低い場合、水平部２及び鉛直部３，４の流路を長くす
ることなく鉛直部３，４に充填材７又は突起物１０を設
け、鉛直部３，４の断面積を狭くして、流体５がゆっく
り流れるように、すなわち、流体５が交互に揺動する周
期が長く（振動数が低く）なるようにしてある。According to the above-described structure, as in the conventional case, the period (frequency) at which the fluid enclosed in the U-shape alternately moves coincides with the frequency of the target structure, and is controlled by the dynamic vibration absorbing action. Shaken. When the vibration frequency of the structure to be damped is low, the filler 7 or the protrusion 10 is provided in the vertical portions 3 and 4 without increasing the flow path of the horizontal portion 2 and the vertical portions 3 and 4, and the vertical portion 3 is provided. , 4 so that the fluid 5 flows slowly, that is, the period in which the fluid 5 oscillates alternately becomes longer (the frequency is lower).
【００２３】図１２に示した従来のＵ字型タンク１にお
ける等価長さＬは、 Ｌ＝ＬH ＋２ＬV …(2) となる。一方、図１に示した本発明によるＵ字型タンク
１における等価長さＬは、 Ｌ＝ＬH ＋２（Ｌ0 ＋Ｌe ＋Ｌ2 ） …(3) となる。ここで、Ｌe は等価面積を狭くした部分の等価
長さで、Ｕ字型タンク１の鉛直部３，４における断面積
をＡ0 と充填材７、突起物１０又は可動式側板８ａ，８
ｂにより断面積を狭くした部分の断面積Ａ1 との比によ
り決まる。すなわち、Ｌe ＝（Ａ0 ／Ａ1 ）Ｌ1 …
(4)となる。したがって、Ａ0 ／Ａ1 は１以上であるた
めＬe ＞Ｌ1 となるので、鉛直部３，４の断面積を狭く
することにより等価長さＬは長くなり、結果的に振動数
ｆが低くなる。The equivalent length L of the conventional U-shaped tank 1 shown in FIG. 12 is as follows: L = L H + 2L V (2) On the other hand, the equivalent length L of the U-shaped tank 1 according to the present invention shown in FIG. 1 is as follows: L = L H +2 (L 0 + L e + L 2 ) (3) Here, Le is the equivalent length of the portion where the equivalent area is reduced, and the cross-sectional area of the vertical portion 3 or 4 of the U-shaped tank 1 is A 0 and the filler 7, the protrusion 10 or the movable side plates 8 a and 8.
b The determined by the ratio of the cross-sectional area A 1 of the narrow portion of the cross-sectional area. In other words, L e = (A 0 / A 1) L 1 ...
(4). Therefore, since A 0 / A 1 is 1 or more, L e > L 1. Therefore, the equivalent length L becomes longer by reducing the cross-sectional area of the vertical portions 3 and 4, and as a result, the frequency f becomes larger. Lower.
【００２４】［第４の実施の形態］第４の実施の形態で
は、図４に示すように、鉛直部３，４の側壁内部を鉛直
方向に複数に区画する格子状の仕切り部材１１を設け、
該仕切り部材１１の仕切り内部に充填材１２を充填した
ものである。なお、図４（Ａ）は図４（Ｂ）のＡ−Ａ線
矢視断面図を示す。この仕切り部材１１は、本実施の形
態では、２０区画に分割し、その内の７区画内に充填材
１２を鉛直方向に充填したものである。充填材１２を充
填する場合には、タンク１内の流体５である水位を仕切
り部材の下端側まで一時的に水位を下げた後、仕切り内
部に必要に応じた数の充填材１２を充填するようにして
いる。なお、仕切り部材１１により仕切られる区画は本
実施の形態のものに限定されるものではなく、設置する
Ｕ字型タンクの大きさにより適宜変更することができ
る。 また、前記充填材１２が充填されていない複数に
区画された流体通路内に減衰効果を奏する金属製又は樹
脂製の例えば網状物等の減衰材（例えば「ヘチマロ
ン」：商品名、泉株式会社製）を充填するようにして、
流体抵抗を付加するようにしてもよい。[Fourth Embodiment] In a fourth embodiment, as shown in FIG. 4, a grid-like partition member 11 for dividing the inside of the side walls of the vertical portions 3 and 4 into a plurality of sections in the vertical direction is provided. ,
The inside of the partition of the partition member 11 is filled with a filler 12. Note that FIG. 4A is a cross-sectional view taken along line AA of FIG. 4B. In the present embodiment, the partition member 11 is divided into 20 sections, and 7 of the sections are filled with the filler 12 in the vertical direction. When filling the filler 12, the water level, which is the fluid 5 in the tank 1, is temporarily lowered to the lower end side of the partition member, and then the required number of fillers 12 are filled in the partition. Like that. The section partitioned by the partition member 11 is not limited to the one in the present embodiment, and can be appropriately changed depending on the size of the U-shaped tank to be installed. In addition, a metal or resin damping material such as a net-like material having a damping effect in a plurality of fluid passages not filled with the filler 12 (for example, "Hetimalon": trade name, manufactured by Izumi Corporation) )
A fluid resistance may be added.
【００２５】本実施の形態によれば、仕切り部材１１内
部に任意の数だけ充填材１２を充填することができるの
で、断面積Ａ1 を任意に調整でき、流体５の揺動周期を
容易に調整することができる。According to this embodiment, it is possible to fill the filling material 12 by any number of internal partition member 11, it can be arbitrarily adjusted cross-sectional area A 1, easily swinging period of the fluid 5 Can be adjusted.
【００２６】また、図５に示すように、仕切り部材１１
内に充填する充填材１２を内設した後に、該充填材１２
を引き上げるようにすることで、流体をタンク内に充満
したままで、更に現場において振動数の微調整を図るこ
とができる。Further, as shown in FIG.
After the filling material 12 to be filled in the inside, the filling material 12
By raising the pressure, the frequency can be finely adjusted on site while the fluid is filled in the tank.
【００２７】また、図６に示すように、本実施の形態の
ように、鉛直部内に仕切り部材１１を設けることによ
り、複数の区分けされた流路が形成されることとなり、
水位を仕切り部材１１の上端より下げることにより、複
数の小さなスロッシングを発生させることで鉛直部の全
体的なスロッシングを防止することが可能となるという
副次的効果を奏する。As shown in FIG. 6, by providing the partition member 11 in the vertical portion as in the present embodiment, a plurality of divided flow paths are formed.
By lowering the water level below the upper end of the partition member 11, a secondary effect is achieved in that a plurality of small sloshings can be generated to prevent the entire sloshing of the vertical portion.
【００２８】さらに、仕切り部材１１内の充填材１２を
充填していない流体が流通する流路内に金属製又は樹脂
製の例えば網状物等の減衰材を挿入し、減衰効果を奏す
るようにしてもよい。Further, a metal or resin damping material, for example, a mesh material, is inserted into the flow path of the partition member 11 through which the fluid not filled with the filler material 12 flows so as to exhibit a damping effect. Is also good.
【００２９】［第５の実施の形態］第５の実施の形態で
は、図７に示すように、鉛直部３，４の側壁の一部を鉛
直部上室と水平部２内とを連通する複数の円筒管１３で
連結し、該円筒管１３内に該円筒管内の流路を閉塞自在
とするバルブ１４を設けたものであり、第４の実施の形
態のように、充填材１２を用いて流路を閉塞する代わり
にバルブ１４により流路を閉塞して、流体が流通する断
面積Ａ1 を任意に調整するようにしている。なお、図７
（Ａ）は図７（Ｂ）のＢ−Ｂ線矢視断面図を示す。な
お、円筒管１３の数は本実施の形態のものに限定される
ものではなく、設置するＵ字型タンクの大きさにより適
宜変更することができる。本実施の形態によれば、第４
の実施の形態のように充填材１２を圧入する際に、流体
５を仕切り部材の下端側まで一時的に水位を下げる必要
がなく、流体５をＵ字型タンク１内に入れたままでその
都度振動数の調整をすることができる。[Fifth Embodiment] In a fifth embodiment, as shown in FIG. 7, a part of the side walls of the vertical portions 3 and 4 communicates the upper portion of the vertical portion with the inside of the horizontal portion 2. A valve 14 connected by a plurality of cylindrical pipes 13 and capable of closing a flow path in the cylindrical pipe 13 is provided in the cylindrical pipe 13, and a filler 12 is used as in the fourth embodiment. It closes the flow passage by the valve 14, instead of closing the flow path Te, fluid is to arbitrarily adjust the cross-sectional area a 1 flowing. FIG.
7A is a cross-sectional view taken along line BB of FIG. 7B. In addition, the number of the cylindrical tubes 13 is not limited to the one in the present embodiment, and can be appropriately changed depending on the size of the U-shaped tank to be installed. According to the present embodiment, the fourth
When the filling material 12 is press-fitted as in the embodiment of the present invention, it is not necessary to temporarily lower the water level of the fluid 5 to the lower end side of the partition member, and the fluid 5 is kept in the U-shaped tank 1 each time. The frequency can be adjusted.
【００３０】本実施の形態によれば、円筒管１３の内部
のバルブ１４を閉塞することで流体５の揺動周期を容易
に調整することができる。According to the present embodiment, the oscillation cycle of the fluid 5 can be easily adjusted by closing the valve 14 inside the cylindrical tube 13.
【００３１】［第６の実施の形態］第６の実施の形態で
は、図８に示すように、鉛直部３，４の側壁の一部にバ
ルブ１５を鉛直方向に少なくとも２ヵ所設けたものであ
り、該バルブ１５を開閉することにより、流路を流路を
適宜閉塞して、バルブ１５位置における部分的な断面積
Ａ1 を任意に調整するようにしている。なお、バルブ１
５の設置する数は何ら限定されるものではないが、少な
くとも２以上とすることで任意に調整することができ
る。Sixth Embodiment In a sixth embodiment, as shown in FIG. 8, at least two valves 15 are provided in a part of the side walls of the vertical portions 3 and 4 in the vertical direction. There, by opening and closing the valve 15, by appropriately closing the flow path of the flow path, and so as to arbitrarily adjust the partial cross-sectional areas a 1 of the valve 15 position. In addition, valve 1
The number of 5 is not particularly limited, but can be arbitrarily adjusted by setting it to at least 2 or more.
【００３２】また、図９に示すように、バルブ１５の設
置する数を増やして、更に、微調整するようにしてもよ
い。Further, as shown in FIG. 9, the number of valves 15 to be installed may be increased and fine adjustment may be made.
【００３３】本実施の形態によれば、鉛直部３，４の内
部のバルブ１５を閉塞することで流体５の揺動周期を容
易に調整することができる。According to the present embodiment, the swing cycle of the fluid 5 can be easily adjusted by closing the valve 15 inside the vertical portions 3 and 4.
【００３４】［第７の実施の形態］第７の実施の形態で
は、図１０に示すように、鉛直部３，４の側壁の上端側
と水平部側との上下二箇所に千鳥格子状の邪魔板（図中
斜線部分１６ａは閉塞部分）１６Ａ，１６Ａを配設し、
該邪魔板１６Ａ，１６Ｂの設置位置における断面積Ａ1
を任意に調整するようにしている。前記邪魔板１６Ａと
１６Ｂとの間の空間内には、減衰材１７を挿入してお
り、流通する流体の減衰を図るようにしている。なお、
邪魔板１６の閉塞部分１６ａの形状は何ら限定されるも
のではなく、平板に円を打ち抜いた開口１８ａを有する
邪魔板１８（図１０（Ｃ）参照）としてもよい。また、
前記開口の開口比率は任意に調整すればよく、必要に応
じて設置した後においても該開口を閉塞部材により閉塞
するようにしてもよい。[Seventh Embodiment] In a seventh embodiment, as shown in FIG. 10, a staggered grid is formed at the upper and lower portions of the side walls of the vertical portions 3 and 4 and the horizontal portion. Baffles (hatched portions 16a in the figure are closed portions) 16A, 16A,
Sectional area A 1 at the installation position of the baffle plates 16A, 16B
Is arbitrarily adjusted. An attenuator 17 is inserted into the space between the baffle plates 16A and 16B so as to attenuate the flowing fluid. In addition,
The shape of the closed portion 16a of the baffle plate 16 is not limited at all, and may be a baffle plate 18 (see FIG. 10 (C)) having a flat-plated opening 18a. Also,
The opening ratio of the opening may be arbitrarily adjusted, and the opening may be closed by a closing member even after the installation, if necessary.
【００３５】本実施の形態によれば、鉛直部３，４の内
部に設置した邪魔板１６を配設することで流体５の揺動
周期を容易に調整することができる。According to the present embodiment, the oscillating cycle of the fluid 5 can be easily adjusted by disposing the baffle plate 16 installed inside the vertical portions 3 and 4.
【００３６】[0036]
【実施例】本発明の実施例について図１１を参照して説
明する。図１１は本実施例にかかるＵ字型流体式制振装
置の概略図であり、図１１（Ａ）は図１１（Ｂ）のＣ−
Ｃ線矢視断面図を示す。図１１に示すように、本実施例
にかかる上部空気室を加圧してなるＵ字型流体式制振装
置は塔状構造物（例えば一般建築物、高層建築物、展望
タワー等塔状等）の上部に設置されるものであり、水平
部２２とその両端に連結された鉛直部２３，２４とから
なるＵ字型タンク２１内には、流体２５として例えば水
が充填されており、水平部２２と連通する鉛直部２３，
２４の上端側には、図示しない加圧手段により加圧され
る空気連通管３１より連通する空気室３２，３３が形成
されている。なお、図中符号３４は空気絞り弁、３５は
水位モニタ及び３６はリリース弁を各々図示する。前記
鉛直部２３，２４内には１６区画に内部を仕切る仕切り
部材１１が配設されており、その内の６区画に充填材１
２を充填している。本実施例では充填材１２として発泡
スチロール等の発泡材を圧入充填している。また区画さ
れた仕切り部材の流体流通路の内部には、樹脂製の減衰
材（「ヘチマロン」：商品名、泉株式会社製）１７が挿
入されており、流体の減衰を図るようにしている。An embodiment of the present invention will be described with reference to FIG. FIG. 11 is a schematic diagram of a U-shaped fluid type vibration damping device according to the present embodiment, and FIG.
3 shows a cross-sectional view taken along line C. As shown in FIG. 11, the U-shaped fluid type vibration damping device formed by pressurizing the upper air chamber according to the present embodiment has a tower-like structure (for example, a tower-like structure such as a general building, a high-rise building, and an observation tower). In a U-shaped tank 21 composed of a horizontal portion 22 and vertical portions 23 and 24 connected to both ends thereof, for example, water is filled as a fluid 25, A vertical part 23 communicating with 22;
Air chambers 32 and 33 are formed on the upper end side of the chamber 24 and communicate with the air communication pipe 31 which is pressurized by pressurizing means (not shown). In the drawing, reference numeral 34 denotes an air throttle valve, 35 denotes a water level monitor, and 36 denotes a release valve. A partition member 11 for partitioning the interior into 16 sections is provided in the vertical sections 23 and 24, and the filler 1 is provided in 6 sections among them.
2 is filled. In this embodiment, a foaming material such as styrene foam is press-fitted as the filler 12. A resin damping material (“Hetimalon”: trade name, manufactured by Izumi Co., Ltd.) 17 is inserted into the fluid flow passage of the partitioned partition member so as to attenuate the fluid.
【００３７】本実施例によれば、鉛直部２３，２４の内
部に設置した仕切り部材１１内の区画に充填材１２を配
することで、流体５の揺動周期を容易に調整することが
できた。また、減衰材１７を流路内に設けることによ
り、流体の減衰効果も向上した。According to the present embodiment, the oscillating cycle of the fluid 5 can be easily adjusted by arranging the filler 12 in the partition within the partition member 11 installed inside the vertical portions 23 and 24. Was. Further, by providing the damping material 17 in the flow path, the fluid damping effect is also improved.
【００３８】[0038]
【発明の効果】以上述べたように、［請求項１］の発明
によれば、水平部とその両端に連結された鉛直部とより
なるＵ字型タンクに流体が入れられ、該流体が交互に移
動する周期を対象構造物の振動数に一致させてその振動
を制振するＵ字型流体式制振装置において、前記Ｕ字型
タンクの鉛直部に一部断面積の狭い部分を設けたので、
Ｕ字型タンクの鉛直部や水平部を長くすることなしに等
価長さを長くできるので、Ｕ字型タンクを大型化しなく
とも流体の振動数を低くすることができる。また、Ｕ字
型を大型化する必要がないので、流体式制振装置の設置
スペースが少なくてすみ、製作及び設置施工に要するコ
ストの低減を図ることができる。As described above, according to the first aspect of the present invention, the fluid is put into the U-shaped tank composed of the horizontal portion and the vertical portions connected to both ends thereof, and the fluid is alternated. In the U-shaped fluid type vibration damping device for damping the vibration by matching the cycle of moving to the frequency of the target structure, a portion having a small cross-sectional area is provided in a vertical portion of the U-shaped tank. So
Since the equivalent length can be increased without lengthening the vertical and horizontal portions of the U-shaped tank, the frequency of the fluid can be reduced without increasing the size of the U-shaped tank. In addition, since it is not necessary to increase the size of the U-shape, the installation space for the fluid type vibration damping device can be reduced, and the cost required for manufacturing and installation can be reduced.
【００３９】［請求項２］の発明によれば、請求項１に
おいて、前記鉛直部に充填材又は突起物を取り付けて断
面積を狭めたこと鉛直部の断面積を容易に狭めることが
できる。According to the invention of [Claim 2], the cross-sectional area of the vertical portion is reduced by attaching a filler or a protrusion to the vertical portion.
【００４０】［請求項３］の発明によれば、請求項１に
おいて、前記鉛直部に可動式板を設けて断面積を可変と
したので、可動式板を任意の位置に可動することができ
るので、流体の揺動周期を容易に調整することができ
る。According to the third aspect of the present invention, in the first aspect, a movable plate is provided in the vertical portion to make a sectional area variable, so that the movable plate can be moved to an arbitrary position. Therefore, the oscillation cycle of the fluid can be easily adjusted.
【００４１】［請求項４］の発明によれば、請求項１に
おいて、前記鉛直部を複数の流路に分割し、該分割され
た流路内の一部に充填材を充填してなるので、仕切り部
材内部に任意の数だけ充填材を充填することができるの
で、断面積を任意に調整でき、流体の揺動周期を容易に
調整することができる。According to the fourth aspect of the present invention, in the first aspect, the vertical portion is divided into a plurality of flow paths, and a part of the divided flow paths is filled with a filler. Since an arbitrary number of fillers can be filled in the partition member, the cross-sectional area can be arbitrarily adjusted, and the oscillation period of the fluid can be easily adjusted.
【００４２】［請求項５］の発明によれば、請求項１に
おいて、前記鉛直部の少なくとも上下二箇所に複数の開
口を有する板状体を鉛直方向と直交する方向に配設して
なるので、流体の揺動周期を容易に調整することができ
る。According to the fifth aspect of the present invention, in the first aspect, a plate-like body having a plurality of openings at least at two positions above and below the vertical portion is disposed in a direction orthogonal to the vertical direction. The swing cycle of the fluid can be easily adjusted.
【００４３】［請求項６］の発明によれば、請求項１乃
至５において、前記鉛直部の流体が流通する流路の内部
に減衰材を挿入してなるので、流通する流体の減衰効果
を奏することができる。According to the sixth aspect of the present invention, in any of the first to fifth aspects, an attenuating material is inserted into the flow passage through which the fluid in the vertical portion flows, so that the effect of attenuating the flowing fluid is reduced. Can play.
【００４４】［請求項７］の発明によれば、請求項１に
おいて、前記鉛直部の少なくとも上下二箇所に流路を任
意に閉塞する流路閉塞手段を設けてなるので、該流路閉
塞手段を任意に閉塞することで流体５の揺動周期を容易
に調整することができる。According to a seventh aspect of the present invention, in the first aspect, a flow path closing means for arbitrarily closing a flow path is provided at at least two positions above and below the vertical portion. Is arbitrarily closed, so that the oscillation cycle of the fluid 5 can be easily adjusted.
【００４５】［請求項８］の発明によれば、水平部とそ
の両端に連結された鉛直部とよりなるＵ字型タンクに流
体が入れられ、該流体が交互に移動する周期を対象構造
物の振動数に一致させてその振動を制振するＵ字型流体
式制振方法において、前記Ｕ字型タンクの鉛直部に一部
断面積の狭い部分を設け、鉛直部の等価長さを調整する
ので、Ｕ字型タンクの鉛直部や水平部を長くすることな
しに等価長さを長くできるので、Ｕ字型タンクを大型化
しなくとも流体の振動数を低くすることができる。According to the invention of claim 8, the fluid is put into the U-shaped tank composed of the horizontal portion and the vertical portions connected to both ends thereof, and the fluid is alternately moved in a period corresponding to the object structure. In the U-shaped fluid type vibration damping method for damping the vibration in accordance with the vibration frequency of the U-shaped tank, a portion having a small cross-sectional area is provided in the vertical portion of the U-shaped tank, and the equivalent length of the vertical portion is adjusted Therefore, the equivalent length can be increased without lengthening the vertical and horizontal portions of the U-shaped tank, so that the frequency of the fluid can be reduced without increasing the size of the U-shaped tank.
【図１】本発明による第１の実施の形態にかかるＵ字型
流体式制振装置の概略構成図である。FIG. 1 is a schematic configuration diagram of a U-shaped fluid type vibration damping device according to a first embodiment of the present invention.
【図２】本発明による第２の実施の形態にかかるＵ字型
流体式制振装置の概略構成図である。FIG. 2 is a schematic configuration diagram of a U-shaped fluid type vibration damping device according to a second embodiment of the present invention.
【図３】本発明による第３の実施の形態にかかるＵ字型
流体式制振装置の概略構成図である。FIG. 3 is a schematic configuration diagram of a U-shaped fluid type vibration damping device according to a third embodiment of the present invention.
【図４】本発明による第４の実施の形態にかかるＵ字型
流体式制振装置の概略構成図である。FIG. 4 is a schematic configuration diagram of a U-shaped fluid type vibration damping device according to a fourth embodiment of the present invention.
【図５】本発明による第４の実施の形態にかかるＵ字型
流体式制振装置の応用例の概略構成図である。FIG. 5 is a schematic configuration diagram of an application example of a U-shaped fluid type vibration damping device according to a fourth embodiment of the present invention.
【図６】本発明による第３の実施の形態にかかるＵ字型
流体式制振装置の応用例の概略構成図である。FIG. 6 is a schematic configuration diagram of an application example of a U-shaped fluid type vibration damping device according to a third embodiment of the present invention.
【図７】本発明による第４の実施の形態にかかるＵ字型
流体式制振装置の概略構成図である。FIG. 7 is a schematic configuration diagram of a U-shaped fluid type vibration damping device according to a fourth embodiment of the present invention.
【図８】本発明による第５の実施の形態にかかるＵ字型
流体式制振装置の概略構成図である。FIG. 8 is a schematic configuration diagram of a U-shaped fluid type vibration damping device according to a fifth embodiment of the present invention.
【図９】本発明による第６の実施の形態にかかるＵ字型
流体式制振装置の概略構成図である。FIG. 9 is a schematic configuration diagram of a U-shaped fluid type vibration damping device according to a sixth embodiment of the present invention.
【図１０】本発明による第７の実施の形態にかかるＵ字
型流体式制振装置の概略構成図である。FIG. 10 is a schematic configuration diagram of a U-shaped fluid type vibration damping device according to a seventh embodiment of the present invention.
【図１１】本発明による一実施例にかかるＵ字型流体式
制振装置の概略構成図である。FIG. 11 is a schematic configuration diagram of a U-shaped fluid type vibration damping device according to an embodiment of the present invention.
【図１２】従来技術にかかるＵ字型流体式制振装置の概
略構成図である。FIG. 12 is a schematic configuration diagram of a U-shaped fluid type vibration damping device according to the related art.
１ Ｕ字型タンク ２ 水平部 ３，４ 鉛直部 ５ 流体 ６ 支持材 ７ 充填材 ８ａ，８ｂ 可動式側板 ９ａ，９ｂ 駆動装置 １０ 突起物 １１ 仕切り部材 １２ 充填材 １３ 円筒管 １４ バルブ １５ バルブ １６ 邪魔板 １７ 減衰材 １８ 邪魔板 ２２ 水平部 ２１ Ｕ字型タンク ２５ 流体 ２３，２４ 鉛直部 ３１ 空気連通管 ３２，３３ 空気室 ３４ 空気絞り弁 ３５ 水位モニタ ３６ リリース弁 DESCRIPTION OF SYMBOLS 1 U-shaped tank 2 Horizontal part 3, 4 Vertical part 5 Fluid 6 Support material 7 Filler 8a, 8b Movable side plate 9a, 9b Driving device 10 Projection 11 Partition member 12 Filler 13 Cylindrical tube 14 Valve 15 Valve 16 Disturbance Plate 17 Damping material 18 Baffle plate 22 Horizontal part 21 U-shaped tank 25 Fluid 23,24 Vertical part 31 Air communication pipe 32,33 Air chamber 34 Air throttle valve 35 Water level monitor 36 Release valve
Claims (8)
よりなるＵ字型タンクに流体が入れられ、該流体が交互
に移動する周期を対象構造物の振動数に一致させてその
振動を制振するＵ字型流体式制振装置において、 前記Ｕ字型タンクの鉛直部に一部断面積の狭い部分を設
けたことを特徴とするＵ字型流体式制振装置。1. A fluid is put into a U-shaped tank consisting of a horizontal portion and a vertical portion connected to both ends thereof, and the frequency of the fluid moving alternately coincides with the frequency of the target structure. A U-shaped fluid type vibration damping device, characterized in that a part having a small cross-sectional area is provided in a vertical portion of the U-shaped tank.
めたことを特徴とするＵ字型流体式制振装置。2. The U-shaped fluid type vibration damper according to claim 1, wherein a cross-sectional area is reduced by attaching a filler or a protrusion to the vertical portion.
を特徴とするＵ字型流体式制振装置。3. The U-shaped fluid type vibration damping device according to claim 1, wherein a movable plate is provided in the vertical portion to change a cross-sectional area.
の一部に充填材を充填してなることを特徴とするＵ字型
流体式制振装置。4. The U-shaped fluid type according to claim 1, wherein the vertical portion is divided into a plurality of flow paths, and a part of the divided flow paths is filled with a filler. Damping device.
る板状体を鉛直方向と直交する方向に配設してなること
を特徴とするＵ字型流体式制振装置。5. The U-shaped fluid type according to claim 1, wherein a plate-like body having a plurality of openings at least at two positions above and below the vertical portion is disposed in a direction orthogonal to the vertical direction. Damping device.
してなることを特徴とするＵ字型流体式制振装置。6. The U-shaped fluid type vibration damping device according to claim 1, wherein an attenuation member is inserted into a flow path through which the fluid in the vertical portion flows.
する流路閉塞手段を設けてなることを特徴とするＵ字型
流体式制振装置。7. The U-shaped fluid type vibration damping device according to claim 1, further comprising a flow path closing means for arbitrarily closing a flow path at at least two positions above and below the vertical portion.
よりなるＵ字型タンクに流体が入れられ、該流体が交互
に移動する周期を対象構造物の振動数に一致させてその
振動を制振するＵ字型流体式制振方法において、 前記Ｕ字型タンクの鉛直部に一部断面積の狭い部分を設
け、鉛直部の等価長さを調整することを特徴とするＵ字
型流体式制振方法。8. A fluid is put into a U-shaped tank composed of a horizontal portion and a vertical portion connected to both ends thereof, and the frequency of the fluid alternately moving coincides with the frequency of the target structure, and the vibration is generated. In a U-shaped fluid type vibration damping method, a portion having a small cross-sectional area is provided in a vertical portion of the U-shaped tank, and an equivalent length of the vertical portion is adjusted. Fluid damping method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27962898A JP3935628B2 (en) | 1998-06-26 | 1998-10-01 | U-shaped fluid damping device and method |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18111298 | 1998-06-26 | ||
| JP10-181112 | 1998-06-26 | ||
| JP27962898A JP3935628B2 (en) | 1998-06-26 | 1998-10-01 | U-shaped fluid damping device and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000081080A true JP2000081080A (en) | 2000-03-21 |
| JP3935628B2 JP3935628B2 (en) | 2007-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27962898A Expired - Fee Related JP3935628B2 (en) | 1998-06-26 | 1998-10-01 | U-shaped fluid damping device and method |
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| Country | Link |
|---|---|
| JP (1) | JP3935628B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160130804A1 (en) * | 2013-06-26 | 2016-05-12 | Rheinisch-Westfälische Technische Hochschule Aachen | Liquid column damping system |
-
1998
- 1998-10-01 JP JP27962898A patent/JP3935628B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160130804A1 (en) * | 2013-06-26 | 2016-05-12 | Rheinisch-Westfälische Technische Hochschule Aachen | Liquid column damping system |
| US9580903B2 (en) * | 2013-06-26 | 2017-02-28 | Rheinisch-Westfaelische-Technische Hochschule Aachen | Liquid column damping system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3935628B2 (en) | 2007-06-27 |
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