JPH01131765A - Vibration damper for structure - Google Patents
Vibration damper for structureInfo
- Publication number
- JPH01131765A JPH01131765A JP29023387A JP29023387A JPH01131765A JP H01131765 A JPH01131765 A JP H01131765A JP 29023387 A JP29023387 A JP 29023387A JP 29023387 A JP29023387 A JP 29023387A JP H01131765 A JPH01131765 A JP H01131765A
- Authority
- JP
- Japan
- Prior art keywords
- tank
- liquid
- vibration
- building
- frequency
- 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.)
- Granted
Links
- 239000007788 liquid Substances 0.000 claims abstract description 52
- 230000010355 oscillation Effects 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 2
- 239000010959 steel Substances 0.000 abstract description 2
- 230000002238 attenuated effect Effects 0.000 abstract 1
- 238000013016 damping Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000001629 suppression Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012916 structural analysis Methods 0.000 description 1
Landscapes
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
Description
【発明の詳細な説明】
「産業上の利用分野」
本発明は、地震や風等によって構造物に引き起こされる
振動を抑制するようにした振動抑制装置に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a vibration suppressing device that suppresses vibrations caused in structures by earthquakes, wind, etc.
「従来の技術およびその問題点」
高強度材料の開発、工作技術の進歩、並びに、電算機に
よる構造解析技術の発展等の要因により近年の構造物は
、大形化、形式の多様化、軽量化が進むとともに、フレ
キシビリティに富む構造となってきている。そして、こ
のように軽量で柔軟な構造物においては、固有振動数が
低く、振動減衰も小さくなる傾向があり、このため、特
に風による空力的外力の影響により予期し得ない種々の
振動が発生する可能性がある。"Conventional technology and its problems" Due to factors such as the development of high-strength materials, progress in manufacturing technology, and development of structural analysis technology using computers, structures in recent years have become larger, more diverse in form, and lighter. As technology advances, structures are becoming more flexible. In addition, such lightweight and flexible structures tend to have low natural frequencies and low vibration damping, and as a result, various unpredictable vibrations occur due to the influence of external aerodynamic forces, especially those caused by wind. there's a possibility that.
このため、この種の振動源を断つという目的から、構造
物の外形に空力的対策を施すことが考えられるが、構造
物の外形には、機能上、あるいは、デザイン的な面から
種々の制約があり、この空力的対策だけに頼ることは困
難である。For this reason, it is conceivable to take aerodynamic measures to the external shape of the structure for the purpose of cutting off this type of vibration source, but there are various restrictions on the external shape of the structure from a functional and design perspective. Therefore, it is difficult to rely solely on this aerodynamic measure.
そこで、本顆発明者は、特願昭６０−２４１０４５号明
細書において、建築物の所要の位置に、建築物の固有の
振動周期と同一の周期で、しかも位相差を伴って振動す
る液体を貯留するタンクを設け、この液体の振動によっ
て建築物の横揺れを抑制することができる振動抑制装置
を提案し、前述の問題を解消している。Therefore, in the specification of Japanese Patent Application No. 60-241045, the inventor of the present invention proposes to install a liquid that vibrates at a predetermined position of a building at the same period as the natural vibration period of the building, but with a phase difference. We have proposed a vibration suppression device that is equipped with a storage tank and can suppress the horizontal shaking of a building by the vibration of this liquid, thereby solving the above-mentioned problems.
ところが、建築物に作用する振動には、横揺れの他に、
建築物の重心と関心とがずれている場合に、風による空
力を受けて発生する回転運動、即ち、建築物の首振り回
転を生じることがあること、また、液体の振動が建築物
の振動が停止した後にも続き、建築物の振動抑制の逆効
果となること等の問題点があった。However, in addition to horizontal shaking, there are other types of vibrations that affect buildings.
If the center of gravity of the building is misaligned with the center of gravity of the building, the rotational movement caused by the aerodynamic force of the wind, that is, the swinging of the building, may occur, and the vibration of the liquid may cause the building to vibrate. This continued even after the vibrations had stopped, causing problems such as having the opposite effect on suppressing vibrations in buildings.
本発明は、前記問題に鑑み、先に本願発明者が提案して
いる振動抑制装置を発展させてなされたもので、風によ
って引き起こされる構造物の横揺れを主とする振動、並
びに、首振り回転による振動の双方を抑制することがで
きると共に、液体の振動を早期に減衰させるこのできる
構造物の振動抑制装置の提供を目的とする。In view of the above-mentioned problems, the present invention has been developed by developing the vibration suppression device previously proposed by the inventor of the present invention, and is designed to suppress vibrations mainly caused by wind-induced lateral shaking of structures, as well as head vibrations. It is an object of the present invention to provide a vibration suppressing device for a structure that can suppress both vibrations due to rotation and quickly damp vibrations of a liquid.
「問題点を解決するための手段」
本発明は、前記問題点を解決するために、構造−物の所
定の位置にタンクが設けられ、このタンクの内部に、前
記構造物の固有の振動周期と同一の振動周期で、かつ、
構造物固有の振動と位相差を伴って振動する液体が貯留
されるとともに、このタンクの内部には前記液体の振動
に伴って回転する曳数の回転羽根が設けられたしのであ
る。``Means for Solving the Problems'' In order to solve the above-mentioned problems, the present invention provides a tank provided at a predetermined position of a structure, and a vibration frequency inherent to the structure. with the same vibration period as, and
A liquid that vibrates with a phase difference from the vibrations inherent to the structure is stored, and a rotary vane with a number of thrusts that rotates with the vibration of the liquid is provided inside this tank.
「作用」
地震や風等により構造物に振動が作用した場合、タンク
に貯留された液体が構造物の振動周期と同一位相で、か
つ位相ずれした状態で振動し、構造物の横揺れを主とす
る振動を抑制ずろととらに、地震や風により構造物に首
振り回転等の振動が生じた場合、首振り回転によりタン
クの周方向に移動する液体が回転羽根を回転させ、この
羽根の回転によって液体内に渦を発生し、液体が乱流と
なり液体の振動を減衰させ、構造物の首振り回転を抑制
する。"Effect" When vibrations are applied to a structure due to earthquakes, wind, etc., the liquid stored in the tank vibrates in the same phase as the structure's vibration period, but out of phase, causing the structure's horizontal shaking to be the main cause. In addition, when vibrations such as oscillating rotation occur in a structure due to an earthquake or wind, the liquid moving in the circumferential direction of the tank due to the oscillating rotation causes the rotating blades to rotate. The rotation generates vortices in the liquid, causing the liquid to flow turbulently, damping the vibrations of the liquid and suppressing the swinging rotation of the structure.
「実施例」
以下、図面を用いて本発明の構造物の振動抑制装置につ
いて説明する。第１図ないし第３図は、本発明の第１実
施例を示すものであり、第１図は本発明の構造物の振動
抑制装置（以下、単に「振動抑制装置」という）が高層
建築物等の連声物の屋上に設置された状態を示すもので
ある。"Example" Hereinafter, a vibration suppressing device for a structure according to the present invention will be described using the drawings. 1 to 3 show a first embodiment of the present invention, and FIG. 1 shows a structure in which the structure vibration suppressing device (hereinafter simply referred to as "vibration suppressing device") of the present invention is installed in a high-rise building. This shows the state where it is installed on the roof of a multi-sounding object such as.
この実施例の建築物ｌは、風によって引き起こされる振
動に対して最も効果があるとされる屋上に、ゴム等の弾
性体と鋼板との積層構造からなる支持台２を設け、この
支持台２の上に、振動抑制作用を行うタンク３を設けた
構成となっている。In the building 1 of this embodiment, a support base 2 made of a laminated structure of an elastic body such as rubber and a steel plate is installed on the rooftop, which is said to be most effective against vibrations caused by wind. A tank 3 is provided on top of the tank 3 for suppressing vibrations.
前記タンク３は、建築物ｌの飲料水、あるいは、防火用
水を貯留するための筒状のタンクであって、上部が開放
された構造となっており、第２図および第３図に示す如
き外形寸法に形成されるとともに、前記建築物１の振動
周期と同一の振動周期となる如き条件で液体Ｗを貯留す
ることにより、風等によって引き起こされる建築物の振
動を抑制する。前記タンク３の底面には、タンク３の中
心部及びその回りに所定距離離間させて放射状に５本の
軸体３ａが立設されており、この軸体３ａには軸体の回
りに回転自在な回転羽根３ｂが取り付けられている。こ
の実施例における回転羽根３ｂは、一方向に回転するよ
うに平面が上形に形成され、その中心部には前ｉ軸体３
ａに挿通可能なように筒状の装着部３Ｃが形成され、さ
らに、タンク３に貯留された液体Ｗ内に没して所定の流
体抵抗を受けるように、高さ方向に所定の幅を有したも
のとなっている。The tank 3 is a cylindrical tank for storing drinking water for the building l or fire prevention water, and has an open top structure, as shown in FIGS. 2 and 3. The vibration of the building caused by wind or the like is suppressed by storing the liquid W under conditions such that the external dimensions are the same and the vibration period is the same as that of the building 1. On the bottom surface of the tank 3, five shafts 3a are erected radially at a predetermined distance from and around the center of the tank 3, and these shafts 3a are rotatable around the shafts. A rotating blade 3b is attached. The rotary blade 3b in this embodiment has an upwardly shaped plane so as to rotate in one direction, and has a front i-shaft body 3 at its center.
A cylindrical mounting portion 3C is formed so that it can be inserted into the tank 3, and has a predetermined width in the height direction so that it can be submerged in the liquid W stored in the tank 3 and receive a predetermined fluid resistance. It has become.
そして、前記タンク３の液体Ｗは、建築物ｌの振動周期
と同一の振動周期となる如き深さに貯留されることによ
り、風によって引き起こされる構造物１の振動を抑制す
る。また、建築物ｌの重心と関心とがずれていた場合で
あって、建築物ｌに首振り回転が生じた場合には、タン
ク内部の液体がタンク３の周方向に流動しようとするが
、この場合、前記回転羽根３ｂは周方向に流動する液体
の流動抵抗となる反面、液体Ｗによって軸体３ａの回り
を一方向に回転され、液体に渦を発生させると共に、液
体を乱流状態とし、タンク３内を液体が周方向に流動す
るのを阻止し、建築物の首振り回転をも抑制する。The liquid W in the tank 3 is stored at a depth such that the vibration period is the same as that of the building l, thereby suppressing vibrations of the structure 1 caused by wind. In addition, if the center of gravity of the building l is misaligned with the object of interest, and if the building l swings, the liquid inside the tank will try to flow in the circumferential direction of the tank 3. In this case, the rotating blades 3b act as flow resistance for the liquid flowing in the circumferential direction, but are also rotated in one direction around the shaft body 3a by the liquid W, generating vortices in the liquid and making the liquid into a turbulent state. , prevents the liquid from flowing in the circumferential direction within the tank 3, and also suppresses the swinging rotation of the building.
従って前記構造の振動抑制装置によれば、建築物ｌの横
揺れを主とする振動と、首振り回転を主とする振動の双
方を抑制することができると共に、回転羽根が流動抵抗
となり早期に液体の振動を減衰させることができる。Therefore, according to the vibration suppressing device having the above structure, it is possible to suppress both the vibration mainly caused by the horizontal shaking of the building l and the vibration mainly caused by the swinging rotation of the building. Vibration of liquid can be damped.
ところで、タンク３に貯留する液体Ｗは、建築物ｌの周
期と同一周期で位相ずれした振動を起こす必要がある。By the way, the liquid W stored in the tank 3 needs to vibrate in a phase-shifted manner with the same period as the period of the building l.
従って、回転羽根を備えていないタンク３を用いる場合
は、液体Ｗ自身の振動に対する減衰率が小さいために、
水よりも粘性の高い液体を用いないと逆に加振する効果
をもたらすことがある。ところが本願発明構造において
は、どのような建築物ｌに適用する場合でも、回転羽根
３ｂの形状、幅、数、および配設位置等を調整すること
によってタンク３に貯留する液体自身の減衰率を調節で
きることになり、ひいては、構造物全体の減衰率も制御
することができる。Therefore, when using a tank 3 without rotating blades, since the damping rate for the vibration of the liquid W itself is small,
Unless a liquid with a higher viscosity than water is used, the opposite effect of vibration may be produced. However, in the structure of the present invention, no matter what kind of building l it is applied to, the attenuation rate of the liquid itself stored in the tank 3 can be adjusted by adjusting the shape, width, number, arrangement position, etc. of the rotary blades 3b. This allows adjustment and thus the damping rate of the entire structure to be controlled.
第７図は本発明の第２実施例を示すもので、先端が液面
の近くまで達するように立設された各軸体３ａ毎に、複
数個（本実施例においては４個）の円形の回転羽根３ｂ
を所定数だけ着脱自在かつ回転自在に設けた構成とした
ものである。なお、軸体３ａに取り付けられた回転羽根
３ｂは、互いに連結して一体に回転させるようにしても
良い。FIG. 7 shows a second embodiment of the present invention, in which a plurality of (four in this embodiment) circular shapes are formed for each shaft 3a, which is erected so that its tip reaches close to the liquid surface. rotating blade 3b
The structure is such that a predetermined number of these are detachably and rotatably provided. Note that the rotating blades 3b attached to the shaft body 3a may be connected to each other and rotated as a unit.
この第２の実施例においては、第１の実施例と同様の効
果を得ることができると共に、回転羽根３ｂの数を適宜
調節することにより、貯留した液体Ｗの量や粘性等に応
じて減衰率を制御することができ、最適の制振効果を発
揮させることができる。In this second embodiment, the same effects as in the first embodiment can be obtained, and by appropriately adjusting the number of rotating blades 3b, damping can be achieved according to the amount, viscosity, etc. of the stored liquid W. The damping rate can be controlled and the optimum damping effect can be achieved.
ここで、特願昭６０−２４１０４５号明細書において行
った建築物ｌとタンクの振動解析を記述する。まず、回
転羽根３ｂを設けていないタンクについて解析するなら
ば、このタンクと建築物１は第４図に示す振動モデルに
近似した振動特性を呈する。Here, the vibration analysis of the building I and the tank conducted in the specification of Japanese Patent Application No. 1988-241045 will be described. First, if we analyze a tank without the rotary vanes 3b, this tank and the building 1 exhibit vibration characteristics similar to the vibration model shown in FIG. 4.
第４図に示す振動モデルは、ばね定数Ｋ。のばね４Ａに
質量Ｍ０の物体５Ａを支持させるとともに、減衰率ｈ０
のダッシュボット６Ａを付加するようにした振動系Ａ（
建築物の振動モデル）と、ばね定数に、のばね４Ｂに有
効質量ＭＩの物体５Ｂを支持させるとともに、減衰率ｈ
１のダッシュポット６Ｂを付加するようにした振動系Ｂ
（タンク内の振動モデル）とから構成されている。The vibration model shown in Fig. 4 has a spring constant K. The spring 4A supports an object 5A with a mass M0, and the damping rate h0
Vibration system A (with dashbot 6A added)
vibration model of a building), the spring constant is made to support the object 5B of effective mass MI, and the damping rate h
Vibration system B with dashpot 6B added
(vibration model inside the tank).
そして、このような振動モデルにおいて、物体４Ａに加
わる外力によって振動系Ａが振動を開始すると、振動系
Ｂは１７４周期の位相差をもって振動を開始するから、
振動系Ａ−Ｈの振動周期を一致させることにより、振動
系Ａの振動を抑制することができる。In such a vibration model, when vibration system A starts to vibrate due to an external force applied to object 4A, vibration system B starts to vibrate with a phase difference of 174 cycles.
By matching the vibration periods of vibration systems A-H, vibration of vibration system A can be suppressed.
ここで、振動系の振動周期は、
の式で与えられ、また、建築物１の振動周期Ｔ０は、構
造設計上の見地から定められた質量Ｍ。、および、ばね
定数に０により一義的に定まるから、タンク３に貯留さ
れた液体Ｗの振動周期Ｔ、を前記Ｔ。と一致させるべく
、タンク３の寸法および容量を設定して両者を一致させ
るようになっている。Here, the vibration period of the vibration system is given by the following equation, and the vibration period T0 of the building 1 is the mass M determined from the viewpoint of structural design. , and since the spring constant is uniquely determined by 0, the vibration period T of the liquid W stored in the tank 3 is T. The dimensions and capacity of the tank 3 are set to match the two.
即ち、タンク内の貯留液の挙動について成立するハウス
ナ−（Ｈｏｕｓｎｅｒ）理論によれば、図示例の如くタ
ンク３内で移動可能な自由水有効質量（振動体として作
用する質量）Ｍｉは、下記（２）式により与えられる。That is, according to the Hausner theory that holds true regarding the behavior of the liquid stored in the tank, the effective mass of free water (the mass that acts as a vibrating body) Mi that can be moved in the tank 3 as shown in the example shown is as follows ( 2) Given by Eq.
ただし、
Ｈ・・・・・・タンク３の底部から水面までの距離Ｒ・
・・・・・タンク３の半径
Ｍ・・・・・・タンク３内に実際に貯留されている液体
の質量
また、面記貯留液Ｗの固有振動ω（いわゆるスロッシン
グの固有振動数）は、下記の（３）式によさらに、前記
固有振動数ωより、下記の（４）式に示す如く振動周期
Ｔが求められる。However, H... Distance R from the bottom of tank 3 to the water surface.
... Radius M of the tank 3 ... Mass of the liquid actually stored in the tank 3 Also, the natural vibration ω (the so-called natural frequency of sloshing) of the stored liquid W is as follows: According to the following equation (3), and from the natural frequency ω, the vibration period T is determined as shown in the following equation (4).
２π
Ｔ−・・・・・・・・・・・・（４）式なお、前記各パ
ラメータに、例えば、
ｒｔ＝１５ｍ
Ｈ＝２ｍ
Ｍ＝ ｌ ４１４ｔ（２式よりＭ＝８１２ｔ）を代入す
ると、Ｔ＝１１．７秒となる。2π T-・・・・・・・・・・・・Formula (4) If, for example, rt=15m H=2m M=l 414t (M=812t from equation 2) is substituted into each of the above parameters, T=11.7 seconds.
そして、前記式にて得られるタンク内の液体の振動周期
と建築物の振動周期Ｔ。との間に、Ｔ、＝Ｔ、 ・・
・・・・・・・・・・・・・・・・（５）式が成立する
如く、タンク３の各寸法および貯留量を設定する。Then, the vibration period of the liquid in the tank and the vibration period T of the building obtained from the above equation. Between, T,=T,...
. . . Each dimension and storage amount of the tank 3 are set so that equation (5) holds true.
なお、振動台による加振した変位応答倍率の実験結果に
より、第５図と第６図に示す如き特性が得られた。第５
図はタンクに液体（水）を貯留した状態で行った実験結
果を示し、第６図はタンクを空の状態にした状態で行っ
た実験結果を示す。As a result of experiments on the displacement response magnification caused by vibration using a vibration table, characteristics as shown in FIGS. 5 and 6 were obtained. Fifth
The figure shows the results of an experiment conducted with liquid (water) stored in the tank, and FIG. 6 shows the results of an experiment conducted with the tank empty.
即ち、第６図に示す如く固有振動数に近い振動数で大き
な振幅を有する建築物にタンクを設け、液体を貯留する
ことにより、第６図に示す如く振動を抑制することがで
きる。That is, as shown in FIG. 6, vibrations can be suppressed as shown in FIG. 6 by providing a tank in a building having large amplitude at a frequency close to the natural frequency and storing liquid therein.
更に、実験の結果、液体Ｗの有効質量ＭＩと建築物ｌの
質量Ｍとの比率を
Ｍ 、／Ｍ ＝ １１５０〜１／ １００・・・・・・
・・・・・・（６）式に設定した場合に有効に振動抑制
効果を発揮することができた。ここで、有効質量が１／
１００以下では、十分な制振効果が得られず、１７５０
以上では、液体が加振効果を逆に引き起こすことがあり
うるので、再度建築物の構造設計を行う必要があるため
に、ＭとＭｌとの比率を前記（６）式の如く設定するほ
うが良い。Furthermore, as a result of the experiment, the ratio between the effective mass MI of the liquid W and the mass M of the building l is M, /M = 1150 to 1/100...
. . . When the equation (6) was set, the vibration suppressing effect could be effectively exhibited. Here, the effective mass is 1/
If it is less than 100, sufficient vibration damping effect cannot be obtained;
In the above case, it is better to set the ratio of M and Ml as shown in equation (6) above, since the liquid may cause the vibration effect in the opposite direction and it is necessary to perform the structural design of the building again. .
更に、種々の要因から、前記タンク内の液体を固定状態
（密閉タンクにち密に充填された状態）とすることが必
要な場合には、前記（２）式に代えて、を採用し、この
（２）式で得られた結果からタンクの容積能、各種数値
を決定すれば良い。Furthermore, if it is necessary to keep the liquid in the tank in a fixed state (closely filled in a closed tank) due to various factors, instead of the above formula (2), use this formula. The volumetric capacity of the tank and various numerical values may be determined from the results obtained using equation (2).
なお、タンク３の形状は前記実施例に示すような円筒状
に限るものではなく、平面４角形、球形、平面楕円状等
、設置条件に応じて種々の形状に変更しても良い。この
場合、ハウスナーの理論をそれぞれ応用し、その形状に
応じた式に基いて振動周期と質量を設定すれば良い。ま
た、本発明の構造物の振動抑制装置は、前記実施例に示
したような建築物に限られることなく、構造物であれば
どのようなものにも用いることができる。The shape of the tank 3 is not limited to the cylindrical shape shown in the above embodiment, but may be changed to various shapes depending on the installation conditions, such as a square planar shape, a spherical shape, and a planar elliptical shape. In this case, it is sufficient to apply Hausner's theory and set the vibration period and mass based on a formula depending on the shape. Further, the structure vibration suppression device of the present invention is not limited to buildings as shown in the above embodiments, but can be used for any structure.
「発明の効果」
以上説明したように本発明は、構造物の所要位置に設け
たタンクに構造物と同一周期でもって位相差を有して振
動する液体を貯留した構成であり、液体の振動が構造物
の振動を抑制するために、地震や風に対する振動抑制効
果を得ることができる。"Effects of the Invention" As explained above, the present invention has a structure in which a liquid that vibrates with the same period as the structure and a phase difference is stored in a tank provided at a predetermined position of a structure. Because it suppresses the vibration of structures, it is possible to obtain vibration suppression effects against earthquakes and wind.
更に、構造物の首振り回転に伴う振動に対し、液体がタ
ンク内でその周方向に流動しようとする際に、回転羽根
が流体抵抗となる一方、液体によって回転され、タンク
内に渦を生じさせて液体を乱流状態とし、これによって
、液体の流動を阻止し、前記振動を抑制することとなり
、構造物の首振り回転に伴う振動も抑制することができ
ると共に、早期に液体の振動、を減衰させることにより
、液体から構造物に与える加振作用を抑制することがで
きる。また、構造物に備えられる給水タンクや防火用水
用タンクを振動抑制用タンクとして用いるならば、タン
クを特別に設置する必要もなくなり、設備コストの面で
有利な効果がある。Furthermore, when the liquid tries to flow in the circumferential direction within the tank due to the vibration caused by the oscillation of the structure, the rotating vanes act as fluid resistance, while being rotated by the liquid and creating a vortex within the tank. This causes the liquid to flow into a turbulent state, thereby preventing the flow of the liquid and suppressing the vibrations.It is also possible to suppress the vibrations associated with the oscillation of the structure, and to prevent the vibrations of the liquid from occurring at an early stage. By attenuating the vibration, it is possible to suppress the vibrational action exerted on the structure from the liquid. Further, if a water supply tank or a fire prevention water tank provided in a structure is used as a vibration suppression tank, there is no need to specially install a tank, which is advantageous in terms of equipment costs.
第１図ないし第３図は、本発明の一実施例を示すもので
、第１図は振動抑制装置を備えた建築物の立面図、第２
図はタンクの平面図、第３図はタンクの縦断面図、第４
図は建築物の振動モデル図、第５図は本発明装置の変位
応答倍率図、第６図は空のタンクの場合の変位応答倍率
図、第７図は本発明の第２実施例を示すタンクの縦断面
図である。
Ｗ・・・・・・液体、
ｌ・・・・・・建築物（構造物）、 ２・・・・・
・支持台、３・・・・・・タンク、
３ａ・・・・・・軸体、３ｂ・・・・・・回転羽根。1 to 3 show one embodiment of the present invention, in which FIG. 1 is an elevation view of a building equipped with a vibration suppression device, and FIG.
The figure is a plan view of the tank, Figure 3 is a vertical cross-sectional view of the tank, and Figure 4 is a longitudinal sectional view of the tank.
The figure is a vibration model diagram of a building, Figure 5 is a displacement response magnification diagram of the device of the present invention, Figure 6 is a displacement response magnification diagram for an empty tank, and Figure 7 is a second embodiment of the present invention. FIG. 3 is a longitudinal cross-sectional view of the tank. W...Liquid, l...Building (structure), 2...
・Support stand, 3...Tank, 3a...Shaft body, 3b...Rotating blade.
Claims (1)
内部に、前記構造物の固有の振動周期と同一の振動周期
で、かつ、構造物固有の振動と位相差を伴って振動する
液体が貯留されるとともに、このタンクの内部には前記
液体の振動に伴って回転する複数の回転羽根が設けられ
てなることを特徴とする構造物の振動抑制装置。A tank is provided at a predetermined position of the structure, and inside this tank there is a liquid that vibrates at the same vibration period as the vibration period unique to the structure and with a phase difference from the vibration unique to the structure. A vibration suppressing device for a structure, characterized in that a plurality of rotary vanes are provided inside the tank to rotate as the liquid vibrates.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29023387A JPH0756188B2 (en) | 1987-11-17 | 1987-11-17 | Vibration suppression device for structures |
| GB8810386A GB2212531B (en) | 1987-11-17 | 1988-05-03 | Method for effectively restraining response of a structure to outside disturbances and apparatus therefor |
| US07/191,278 US4922671A (en) | 1987-11-17 | 1988-05-06 | Method for effectively restraining response of a structure to outside disturbances and apparatus therefor |
| CA000566269A CA1296746C (en) | 1987-11-17 | 1988-05-09 | Method for effectively restraining response of a structure to outside disturbances and apparatus therefor |
| FR888806291A FR2623224B1 (en) | 1987-11-17 | 1988-05-10 | |
| CN88102899A CN1014623B (en) | 1987-11-17 | 1988-05-10 | Method for effectively restraining response of structure to outside disturbances and equipment therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29023387A JPH0756188B2 (en) | 1987-11-17 | 1987-11-17 | Vibration suppression device for structures |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01131765A true JPH01131765A (en) | 1989-05-24 |
| JPH0756188B2 JPH0756188B2 (en) | 1995-06-14 |
Family
ID=17753477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29023387A Expired - Lifetime JPH0756188B2 (en) | 1987-11-17 | 1987-11-17 | Vibration suppression device for structures |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0756188B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005334349A (en) * | 2004-05-27 | 2005-12-08 | Nice Corp | Automatic fire extinguishing system in structure |
-
1987
- 1987-11-17 JP JP29023387A patent/JPH0756188B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005334349A (en) * | 2004-05-27 | 2005-12-08 | Nice Corp | Automatic fire extinguishing system in structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0756188B2 (en) | 1995-06-14 |
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