JPH06212835A - Fluidal vibration damper - Google Patents

Fluidal vibration damper

Info

Publication number
JPH06212835A
JPH06212835A JP699593A JP699593A JPH06212835A JP H06212835 A JPH06212835 A JP H06212835A JP 699593 A JP699593 A JP 699593A JP 699593 A JP699593 A JP 699593A JP H06212835 A JPH06212835 A JP H06212835A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
tank
vibrations
building
vibration
storage
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
Application number
JP699593A
Other languages
Japanese (ja)
Other versions
JP2973763B2 (en )
Inventor
Akira Teramura
彰 寺村
Original Assignee
Ohbayashi Corp
株式会社大林組
Priority date (The priority date 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 date listed.)
Filing date
Publication date

Links

Abstract

PURPOSE: To obtain a large vibration-damping effect with a small mass ratio by horizontally balancing and holding a storage tank, in which water vibrated with the vibrations of a building and required phase difference is stored, at all times.
CONSTITUTION: A storage tank 14, which has the period of vibrations coinciding with the period of intrinsic vibrations of a building and in which water 16 vibrated with the vibrations of the building and required phase difference is stored, is installed onto the floor 10 of the building. In the vibration damper, the storage tank 14 is borne in a rockable manner at a level lower than the center of gravity of the tank 14, and balanced and held horizontally at all times by a tank horizontal holding means. The supporting point of the tank 14 and the tank horizontal holding means are composed of a tank base 14a formed in a downward projected arcuate surface and a pedestal 12 receiving the tank base 14a, the arcuate surface of the pedestal 12 is projected downward, and the curvature of the arcuate surface of the pedestal 12 is made smaller than that of the tank base 14a.
COPYRIGHT: (C)1994,JPO&Japio

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【産業上の利用分野】この発明は、パッシブ流体方式の制振装置において、小さなマス比(流体重量/構造物重量)で大きな制振効果を得るようにした流体式制振装置に関するものである。 BACKGROUND OF THE INVENTION This invention is a vibration damping device of the passive fluid system, to a hydraulic damping device to obtain a large vibration damping effect with a small mass ratios (fluid weight / structure weight) .

【0002】 [0002]

【従来の技術】パッシブ流体方式の制振装置は、高層建築物などの屋上など構造物の所定の位置に貯留タンクを設け、この貯留タンクの内部に前記構造物の固有の振動周期と一致する振動周期で構造物の振動と所要の位相差をもって振動する水などの液体が貯留されたものであって、構造物が静止状態にあるときは、図4の想像線で示すように構造物の床3上に固定された貯留タンク1内の液体2は静止している。 Vibration damping device of the Related Art Passive fluid system, a storage tank in a predetermined position of the roof, such as structures such as high-rise building is provided, which coincides with the natural vibration period of the structure in the interior of the storage tank be those liquid such as water which oscillates with a desired phase difference between the vibration of the structure at the vibration period is stored, when the structure is at rest, the structure as shown in phantom in FIG. 4 liquid 2 in the storage tank 1 which is fixed on the floor 3 is stationary. 構造物が振動すると、タンク1 When the structure is vibrated, the tank 1
内の液体1は建物の振動位相から90°遅れで揺動し液体がその方向に移動しその揺動変位±x1 がタンク1の壁面に慣性力F1として作用して建物に伝わり、その結果、この揺動エネルギーが構造物の減衰力として働き、 Liquid 1 of the inner is transmitted to the building that swings ± x1 liquid swung at 90 ° delayed from the vibration phase is moved in that direction of the building acts as an inertial force F1 on the wall of the tank 1, as a result, the rocking energy acts as a damping force of the structure,
構造物が風や地震などによって何時までも揺れ続けるのを防止する。 Structure is to prevent the continuing also shaking up time by such as wind and earthquakes.

【0003】このパッシブ流体方式の制振装置を構成する貯留タンクは、従来は図に示すように構造物の上部などに固定されているか、或いは上方から吊っているかのいずれかの方式が採用されているが、次に述べる技術的な欠点があった。 [0003] storage tank constituting a vibration control device of the passive fluid system is conventionally are either fixed to a top of the structure as shown in FIG., Or is of any of the methods are hanging from above is adopted and has, but there is described below a technical drawback.

【0004】 [0004]

【発明が解決しようとする課題】まず、固定方式の場合には貯留タンク内の流体の重心移動が緩慢で、慣性力が小さく、したがって制振効果が小さい。 [Problems that the Invention is to Solve] First, in the case of the fixing system is slow center of gravity movement of the fluid in the storage tank, the inertial force is small, thus damping effect is small. 逆に言えば大きな制振力を与えるためには大容量のタンク,流体を必要とする。 To provide greater damping force conversely requires tank of a large capacity, the fluid.

【0005】これに対して上方から吊る方式では構造物の揺れによって自身も揺れるので慣性力が大きい反面、 [0005] In contrast inertial force is large because the system hanging from above shaken also own the sway of the structure with respect thereto,
タンクを振り子状に支持するため、装置全体の占有空間が大掛かりなものとなるほか、振り子による固有周期と液体の動きによる固有周期とが交錯し解析が複雑であるとともに、固有周期が一致すると液体とタンクとの相対移動が少なくなり、スロッシングが減殺される可能性も生じていた。 To support the tank like a pendulum, in addition to the space occupied by the entire apparatus becomes large-scale, with the natural period is crossing analysis is complicated by the natural period and movement of the liquid by the pendulum, when the natural period coincides liquid a relative movement between the tank is reduced, it was also caused a possibility that sloshing is diminished.

【0006】この発明は以上の問題を解決するものであって、その目的は、液体の揺動に伴い、タンクも若干傾けることができるようにすることによって、大きな慣性力を生じさせることができるようにした流体式制振装置を提供するものである。 [0006] be one this invention to solve the above problems, and an object, with the swinging of the liquid, by to be able to tilt slightly tank, it can produce a large inertial force there is provided a hydraulic damping apparatus that.

【0007】 [0007]

【課題を解決するための手段】前記目的を達成するため、この発明は、構造物の所定の位置に貯留タンクを設け、該タンクの内部に、前記構造物の固有の振動周期と一致する振動周期であって、該構造物の振動と所要の位相差をもって振動する液体が貯留された制振装置において、前記タンクを前記構造物の設置面に前記タンクの重心より低いレベルにおいて揺動可能に支持するとともに、前記タンクの揺動を、タンク水平保持手段により常時水平バランス保持したものである。 Means for Solving the Problems] To achieve the above object, the present invention is a storage tank provided at a predetermined position of the structure, the interior of the tank, which coincides with the natural vibration period of the structure vibration a cycle, in the vibration damping device in which the liquid to vibrate with a required phase difference between the vibration of said structure is stored, the tank swingably at a lower level than the center of gravity of the tank to the installation surface of the structure while supporting the swinging of the tank is obtained by constantly horizontal balance held by tank horizontal holding means.

【0008】また、タンクの支持部および水平保持手段が、下に凸な円弧面に形成したタンク底面と、これを受ける台座とからなり、台座の円弧面が下に凸であってその曲率が前記タンク底面の円弧面の曲率より小さいものである。 Further, the support and leveling means of the tank, and the tank bottom which is formed in a convex arc surface down, consists of a base which receives this, the curvature of the circular arc surface of the pedestal is a convex downward is it is smaller than the curvature of the arcuate surface of the tank bottom.

【0009】さらに、タンクの支持部が前記タンクの中央部側面または下面に取付けたピンであり、タンク水平保持手段が、バネ等をともなうダンパー部材であるものである。 Furthermore, a pin support portion of the tank is mounted on the central portion side or a lower surface of the tank, the tank horizontally holding means those wherein the damper member with a spring or the like.

【0010】 [0010]

【作用】以上の構成によれば、構造物が静止状態であると、貯留タンクの支点と流体の重心位置は一致し静止している。 According to the above structure, when the structure is in a stationary state, the center of gravity position of the fulcrum and the fluid of the storage tank is matched stationary. この状態から構造物が振動するとその振動の強さに応じて液体が揺動変位し、同時に重心位置を変えて貯留タンクをその支点を中心として変位方向側が低くなるようタンクを傾かせることによって、さらに流体の流れは加速され、タンク壁面を通じてより大きな慣性力を構造物に伝える。 When the structure of this state is vibrated by the liquid according to the intensity of the vibration is swings, it tilts the tank so that the displacement direction side is lower the storage tank around its supporting point by changing the center of gravity position at the same time, further flow of fluid is accelerated, convey to the structure a greater inertial force through the tank wall. タンクの傾きの周期は水の揺動周期と常時一致するのでその解析は単純となる。 The analysis becomes simple since the period of the inclination of the tank is consistent at all times and the swinging period of the water. しかも、タンク自体は殆ど水平移動をしないのでスロッシングを減殺する恐れはない。 Moreover, the tank itself is not afraid of offsetting sloshing because hardly a horizontal movement.

【0011】 [0011]

【実施例】以下、この発明の実施例を図面を用いて詳細に説明する。 EXAMPLES Hereinafter, will be described in detail with reference to the drawings an embodiment of the present invention.

【0012】図1はこの発明の第一実施例を示すものである。 [0012] Figure 1 shows a first embodiment of the present invention. 図において、例えば高層建築物などの屋上の床1 In the figure, for example, the roof, such as high-rise building floor 1
0上には所定の曲率の凹状の円弧面とした台座12が固定配置され、この台座12上にはU字管形をした貯留タンク14が設置され、その内部に制御用の水16を蓄えている。 On 0 pedestal 12 which is a concave arc surface having a predetermined curvature is fixedly disposed, the pedestal 12 on are installed storage tank 14 in which the U-tube type, stored water 16 for controlling therein ing. 水16は、建物の固有の振動周期と一致する振動周期であって、該構造物の振動と所要の位相差をもって振動するもので、この位相差により制振力を付与する。 Water 16 is a vibration period which coincides with the natural vibration period of the building, intended to vibrate with a required phase difference between the vibration of said structure, to impart a damping force by the phase difference.

【0013】貯留タンク14の底面14aは前記台座の曲率より高い曲率の凸状の円弧面に形成されており、台座12上にその底面14aの中心を支点部として揺動可能に支持されている。 [0013] bottom surface 14a of the storage tank 14 is formed in a convex arc face of high curvature than the curvature of the pedestal, is pivotably supported as fulcrum the center of the bottom surface 14a on the base 12 .

【0014】以上の構成において、建物が静止状態にあるときは水16の重心G0と底面14aの支点Oとが一致し、図中想像線で示すように水平状態にバランス保持され、静止している。 [0014] In the above configuration, when the building is in a quiescent state match and the fulcrum O of the center of gravity G0 and the bottom surface 14a of the water 16, is balanced maintained in a horizontal state as shown in FIG phantom, stationary there.

【0015】この状態から強風や地震などにより建物に振動が伝わると、揺動変位±x1 がタンク14の壁面に慣性力F1 として作用して建物に伝わり(図5参照) [0015] When the vibration in the building due to strong winds and earthquakes from this state transmitted, swings ± x1 is transmitted to the building to act as an inertial force F1 to the wall surface of the tank 14 (see FIG. 5)
が、この発明ではこれと同時にその重心G0 が変位方向G1 ,G2 へと移動する。 But the center of gravity G0 the same time in the present invention moves to the displacement direction G1, G2. この結果タンク14は支点O As a result tank 14 is the fulcrum O
を中心に重心の移動方向に傾き、またこの傾きにより水の流れが加速x2 (>x1 :図5参照)されてより大きな慣性力F2 (>F1 :図5参照)が生ずることになり、建物に対する制振力として有効に寄与する。 Tilt in the direction of movement of the center of gravity in the center, and also the flow of water accelerated by the inclination x2 (> x1: see FIG. 5) has been greater inertial force F2 (> F1: see FIG. 5) will be occurs, building effectively contributes as a damping force against.

【0016】なお、図示しないがタンク14の最大傾斜を規制する手段を設けておけば、転倒や水16の零れ落ちなどを防止できる。 [0016] Although not shown if provided with means for regulating the maximum inclination of the tank 14, can prevent a spill off of overturning or water 16. また、タンク14は左右方向の傾きだけでなく、紙面と直交する前後方向など水16の動きに応じて全方向に傾斜させることができる。 Further, tank 14 is not only the inclination in the horizontal direction, it can be tilted in all directions in response to movement of the front and rear directions such as water 16 which is perpendicular to the paper surface.

【0017】図2は、ある構造物モデルに振動を与えたときの振幅の時刻歴の実験例を示すものであって、 [0017] Figure 2, there is shown an experimental example of the amplitude time histories when vibrated to a structure model,
(a)に示すようにある特定の振幅の入力波を構造物モデルに与えた場合、制振のための制御が行われていない場合には、(b)に示すように構造物モデルは順次減衰しつつも振動が持続する。 When given an input wave of a specific amplitude in as shown in (a) the structure model, if a control for damping not performed sequentially the structure model as shown in (b) while damping the vibration is sustained.

【0018】これに対し、水の重心移動のみによってタンクが傾く方式を採用した場合には、(c)に示すように振幅は急激に減衰し、制振のために極めて効果的であることを確認した。 [0018] In contrast, in the case of adopting the method that the tank is inclined only by movement of the center of gravity of the water, the amplitude as shown in (c) is rapidly attenuated, it is extremely effective for damping confirmed.

【0019】図3はこの発明の第二実施例を示すもので前記実施例と同一箇所には同一記号を付し、異なる点にのみ異なる符号を用いて説明を行う。 [0019] Figure 3 are denoted by the same symbols in the Examples and the same place in one showing a second embodiment of the present invention is described with reference to only different codes at different points.

【0020】図において、水16を内部に蓄えたU字管形の貯留タンク20の底面中心は床10に配置された支点部22によってシーソー状に支持されているとともに、底面の左右には一対の圧縮バネ等をともなうダンパー部材24が介在されている。 [0020] In view, with the center of the bottom surface of the storage tank 20 of the U-shaped tube form the water 16 accumulated inside is supported like a seesaw by the fulcrum 22 arranged on the floor 10, a pair in the left and right of the bottom surface damper member 24 with a compression spring or the like is interposed.

【0021】ダンパー部材24は、タンク20が図の想像線に示す静止状態でタンク20を水平に支持しているとともに、図の実線で示す揺動時においてタンク20の底面の両角部が床10に衝突することを防止するためのクッションとしての機能を有する。 [0021] The damper member 24, the tank 20 together are horizontally supported in a stationary state where the tank 20 is shown in phantom lines in FIG., Both corner portions floor 10 of the bottom surface of the tank 20 during swinging indicated by the solid line in FIG. It has a function as a cushion to prevent impinging on.

【0022】この構成においても構造物が静止状態にあるときは水16の重心G0と支点部22の支点Oとが一致し、図中想像線で示すように水平状態にバランス保持され、静止している。 [0022] This also when the structure is in a quiescent state match and the fulcrum O of the center of gravity G0 and the fulcrum portion 22 of the water 16 in the configuration, a balanced maintained in a horizontal state as shown in FIG phantom, stationary ing. この状態から振動が構造物に伝わると、揺動変位±x1 がタンク20の壁面に慣性力F1 When vibration from this state is transmitted to the structure, the inertial force F1 swings ± x1 is on the wall of the tank 20
として作用して建物に伝わり、これと同時にその重心G Acts transmitted to the building as, and at the same time its center of gravity G
0 が変位方向に移動し、この結果タンク20は支点Oを中心に重心の移動方向に傾き、またこの傾きにより水の流れが加速x2 されてより大きな慣性力F2 が生ずることになる。 0 is moved in the displacement direction, the result tank 20 is inclined in the direction of movement of the center of gravity about the fulcrum O, also become a greater inertial force F2 is produced that the water flow is accelerated x2 by the inclination.

【0023】なお、前記各実施例では貯留タンクとしてU字管形のものを用いたが、矩形状タンクその他制振のために有利な形状としても良いことは勿論である。 [0023] Incidentally, the was used as the U-shaped tube form as a storage tank in the embodiment, may also be an advantageous shape for the rectangular tank other damping is a matter of course.

【0024】 [0024]

【発明の効果】以上各実施例によって詳細に説明したように、この発明による流体式制振装置にあっては、構造物が振動するとその振動の強さに応じて液体が揺動変位し、同時に重心位置を変えて貯留タンクをその支点を中心として変位方向側が低くなるようタンクを傾かせることによって、さらに流体の流れは加速され、タンク壁面を通じてより大きな慣性力を構造物に伝えるため、従来に比べて小さなマス比率で大きな制振効果が得られ、装置の小形化,低価格化を図る上で好適である。 [Effect of the Invention] As described above respective Examples in detail, in the fluid type vibration damping device according to the present invention, the liquid is swingingly displaced according to the intensity of the vibration when the structure is vibrated, by displacement direction side storage tank about its fulcrum by changing the center of gravity tilts the tank so that the lower simultaneously, the further fluid flow acceleration, to convey to the structure a greater inertial force through the tank wall, prior large damping effect is obtained with a small mass ratio as compared to, miniaturization of the apparatus, it is preferable in achieving cost reduction. タンクの傾きの周期は水の揺動周期と常時一致するのでその解析は単純であり、設計なども簡易に行うことができる。 Period of the inclination of the tank is the analysis because match always with the swinging period of the water is simple, it can be easily performed well as design. しかも、タンク自体はほとんど水平移動しないのでスロッシングを減殺する恐れはない。 Moreover, there is no possibility of offsetting sloshing since tank itself hardly moved horizontally.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】この発明の第一実施例による流体式制振装置の原理説明図である。 1 is an explanatory view of the principle of the hydraulic damping device according to the first embodiment of the present invention.

【図2】(a)〜(c)は構造物モデルに振動を与えたときの振幅の時刻歴の実験例を示すグラフである。 Figure 2 (a) ~ (c) is a graph showing an experimental example of the amplitude time histories when vibrated in the structure model.

【図3】この発明の第二実施例による流体式制振装置の原理説明図である。 3 is an explanatory view of the principle of the hydraulic damping device according to the second embodiment of the present invention.

【図4】従来のパッシブ流体方式の制振装置の原理説明図である。 4 is an explanatory view of the principle of the vibration damping device of the conventional passive fluid system.

【符号の説明】 DESCRIPTION OF SYMBOLS

10 床 14,20 貯留タンク 16 水(液体) 14a,22 支点部 (14a 底面,22 支点部) 10 bed 14,20 storage tank 16 water (liquid) 14a, 22 fulcrum (14a bottom 22 fulcrum)

Claims (3)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 構造物の所定の位置に貯留タンクを設け、該タンクの内部に、前記構造物の固有の振動周期と一致する振動周期であって、該構造物の振動と所要の位相差をもって振動する液体が貯留された制振装置において、 前記タンクを前記構造物の設置面に前記タンクの重心より低いレベルにおいて揺動可能に支持するとともに、前記タンクの揺動を、タンク水平保持手段により常時水平バランス保持したことを特徴とする流体式制振装置。 1. A provided storage tank at a predetermined position of the structure, the interior of the tank, a vibration period which coincides with the natural vibration period of the structure, vibration required phase difference of said structure in the vibration damping device which retains a liquid to vibrate with a said with swingably supported at a lower level than the center of gravity of the tank to the installation surface of the tank the structure, the swing of the tank, the tank horizontally holding means hydraulic damping device, characterized in that it has always horizontal balance held by.
  2. 【請求項2】 タンクの支点部および水平保持手段が、 2. A tank fulcrum and leveling means,
    下に凸な円弧面に形成したタンク底面と、これを受ける台座とからなり、台座の円弧面が下に凸であってその曲率が前記タンク底面の円弧面の曲率より小さいことを特徴とする請求項1に記載の流体式制振装置。 Consists of a tank bottom which is formed in a convex arc surface below, a pedestal for receiving this, the curvature of the circular arc surface of the pedestal is a convex downward is equal to or smaller than the curvature of the arcuate surface of the tank bottom surface hydraulic damping device according to claim 1.
  3. 【請求項3】 タンクの支点部が前記タンクの中央部側面または下面に取付けたピンであり、タンク水平保持手段が、バネ等をともなうダンパー部材である請求項1に記載の流体式制振装置。 3. a pin fulcrum portion is attached to the central portion side or a lower surface of the tank of the tank, the tank horizontally holding means, hydraulic damping device according to claim 1, wherein the damper member with a spring or the like .
JP699593A 1993-01-19 1993-01-19 Hydraulic damping device Expired - Lifetime JP2973763B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP699593A JP2973763B2 (en) 1993-01-19 1993-01-19 Hydraulic damping device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP699593A JP2973763B2 (en) 1993-01-19 1993-01-19 Hydraulic damping device

Publications (2)

Publication Number Publication Date
JPH06212835A true true JPH06212835A (en) 1994-08-02
JP2973763B2 JP2973763B2 (en) 1999-11-08

Family

ID=11653713

Family Applications (1)

Application Number Title Priority Date Filing Date
JP699593A Expired - Lifetime JP2973763B2 (en) 1993-01-19 1993-01-19 Hydraulic damping device

Country Status (1)

Country Link
JP (1) JP2973763B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8001734B2 (en) * 2004-05-18 2011-08-23 Simpson Strong-Tie Co., Inc. Moment frame links wall

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8001734B2 (en) * 2004-05-18 2011-08-23 Simpson Strong-Tie Co., Inc. Moment frame links wall
US8763319B2 (en) 2004-05-18 2014-07-01 Simpson Strong-Tie Company Inc. Moment frame links wall

Also Published As

Publication number Publication date Type
JP2973763B2 (en) 1999-11-08 grant

Similar Documents

Publication Publication Date Title
JP2000297556A (en) Vibration control structure
US3940895A (en) Earthquake isolating and vibration absorbing equipment for structures
EP0618380A1 (en) Dynamic vibration absorber for pendulum type structure
US5348266A (en) Reduced horizontal stiffness vibration isolation system
US4012581A (en) Frame-type damping spacer
WO1993008414A1 (en) Vibration damper
JP2003004097A (en) Horizontal two shaft direction base isolation device for steel structure
JP2000014472A (en) Base isolation device for housed article or the like
US3922891A (en) Clothes washer suspension system
JPH10184094A (en) Damping mechanism, vibration isolation structure using the damping mechanism, and damping device
JPH10107530A (en) Antenna system
EP0204330A2 (en) Dynamic vibration absorber
JP2004092112A (en) Floor vibration damping device
US4875313A (en) Device for suppressing vibration of structure
US3537765A (en) Rotary supports and associated vibration dampers for fast spinning bodies of revolution
JP2000304086A (en) Base isolation device
JP2004346562A (en) Passive type two-stage vibration control device
CN87100111A (en) Power vibration damper
JP2001082001A (en) Damping device for vibration control
JP2001180797A (en) Support structure for storage tank
JP2005330011A (en) Sloshing control mechanism of floating cover type storage tank
JPH09142575A (en) Floating roof type storage tank
JPH02101422A (en) Oscillation reflecting mirror supporting mechanism
JP2002206595A (en) Vibration isolation device and quake absorbing rack using the same
JP2009222080A (en) Vibration suppression device