JPH06264960A - Vibration damping device of pendulum type - Google Patents

Vibration damping device of pendulum type

Info

Publication number
JPH06264960A
JPH06264960A JP5048098A JP4809893A JPH06264960A JP H06264960 A JPH06264960 A JP H06264960A JP 5048098 A JP5048098 A JP 5048098A JP 4809893 A JP4809893 A JP 4809893A JP H06264960 A JPH06264960 A JP H06264960A
Authority
JP
Japan
Prior art keywords
weight
pendulum
arm
vibration
actuator
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
JP5048098A
Other languages
Japanese (ja)
Other versions
JP2674459B2 (en
Inventor
Yoshinori Matsunaga
義憲 松永
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kajima Corp
Original Assignee
Kajima Corp
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
Application filed by Kajima Corp filed Critical Kajima Corp
Priority to JP5048098A priority Critical patent/JP2674459B2/en
Publication of JPH06264960A publication Critical patent/JPH06264960A/en
Application granted granted Critical
Publication of JP2674459B2 publication Critical patent/JP2674459B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Buildings Adapted To Withstand Abnormal External Influences (AREA)

Abstract

PURPOSE:To prolong a cycle of a pendulum over a long period of time by suppressing the height of a vibration damping device of pendulum type and simplifying its structure. CONSTITUTION:A vibration damping device of pendulum type consists of arms 2 which are supported around a horizontal shaft 21 rotatably on a construction 7 and arranged in parallel, a connecting link 3 which is connected with both arms 2 around the horizontal shaft 21 rotatably, and a weight 6 which is connected to a tip of a suspension bar 5 which suspends from the intermediate section of the connecting link 3. The length of a pendulum which is large for the height of an actual device which has a simple structure is ensured by utilizing a link device which consists of the arms 2 and the connecting link 3 so that a cycle of the weight 6 as the pendulum is prolonged.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明は振り子を利用して強風
時や地震時の構造物の揺れを抑制する、振り子式制震装
置に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pendulum type vibration damping device which utilizes a pendulum to suppress the shaking of a structure during strong winds or earthquakes.

【0002】[0002]

【従来技術及び発明が解決しようとする課題】振り子の
振動を利用した制震装置は振り子に構造物の固有周期と
同程度の周期を与えることにより構造物の振動時に振り
子が振動してエネルギーを吸収し、構造物の揺れを抑制
するものであるが、長周期化するには振り子長さを大き
くする必要があることから、単振り子では数層分の高さ
になる場合があり、設置が制限される。
2. Description of the Related Art A vibration control device utilizing vibration of a pendulum provides a pendulum with a period that is similar to the natural period of a structure, so that the pendulum vibrates when the structure vibrates and energy is generated. It absorbs and suppresses the shaking of the structure, but since it is necessary to increase the pendulum length in order to lengthen the period, a single pendulum may have a height of several layers, so installation is not possible. Limited.

【0003】この設置上の障害に対し、特定の曲率を持
つ振動体をローラ上に載せ、振動させることにより曲率
半径を振り子長さとする振り子として機能させる装置
や、振り子の外周にフレームを多重に配置し、振り子を
吊るロープをフレーム間に架設することにより振り子長
さを横方向に確保し、高さを抑える装置があるが、前者
ではローラとの摩擦を考慮しなければならず、後者では
振り子を吊るための部材数が増大し、細部の調整を要す
るため組立が複雑化する他、ノイズの発生がある等の問
題が指摘される。
In response to this installation obstacle, a vibrating body having a specific curvature is placed on a roller and vibrated to function as a pendulum having a radius of curvature as a pendulum length, or a frame is multiply provided on the outer circumference of the pendulum. There is a device that arranges and suspends the pendulum rope between the frames to secure the pendulum length in the lateral direction and suppress the height.In the former case, friction with the roller must be taken into consideration, and in the latter case. It is pointed out that the number of members for suspending the pendulum is increased and the details are required to be adjusted, which complicates the assembly and causes noise.

【0004】この発明は振り子式制震装置の設置上の問
題に着目してなされたもので、簡素な構造で、高さを抑
える制震装置を提案しようとするものである。
The present invention has been made by paying attention to the problem of installation of the pendulum type vibration control device, and is intended to propose a vibration control device having a simple structure and suppressing the height.

【0005】[0005]

【課題を解決するための手段】本発明では互いに回転自
在に連結され、門形に組み立てられたリンク装置を利用
することにより簡素な構造でありながら、実際の装置の
高さに対して大きい振り子長さを確保し、振り子の周期
を長期化する。
SUMMARY OF THE INVENTION In the present invention, a pendulum having a simple structure by utilizing link devices which are rotatably connected to each other and are assembled in a gate shape is large with respect to the actual height of the device. Secure the length and prolong the pendulum cycle.

【0006】門形のリンク装置は構造物に水平軸回りに
回転自在に支持される、並列するアームと、両アームに
水平軸回りに回転自在に接続される連結リンクとからな
り、振り子である重りは連結リンクの中間部から懸垂す
る懸垂棒の先端に接続される。
The gate-shaped link device is a pendulum composed of parallel arms rotatably supported on a structure around a horizontal axis and connecting links rotatably connected to both arms around the horizontal axis. The weight is connected to the tip of a suspension bar that suspends from the middle of the connecting link.

【0007】重りは構造物の振動時にアームが水平軸回
りに往復回転運動することに伴い、懸垂棒の、連結リン
クとの接続点の延長線上にある仮想の支点回りに振動
し、実質的な懸垂棒の長さより大きい振り子長さを持つ
ことにより単振り子の場合に必要とする高さより低い成
の装置によって重りの長周期化が実現される。
[0007] The weight vibrates around an imaginary fulcrum on the extension line of the connection point of the suspension bar with the reciprocating rotational movement of the arm around the horizontal axis when the structure vibrates, so that the weight is substantially By having a pendulum length that is greater than the length of the suspension rod, a longer period of the weight is achieved by a device that is lower in height than that required for a single pendulum.

【0008】重りの長周期化が3本のリンクによって可
能になることにより制震装置の構造が簡素化され、高い
組立精度や細かい調整を要せず、また各構成部材の連結
がピンであることにより部材間の力の損失やノイズの発
生が回避される。
Since the weight can be lengthened by three links, the structure of the vibration control device is simplified, high assembly precision and fine adjustment are not required, and the connection of each component is a pin. This avoids loss of force between members and generation of noise.

【0009】制震装置による構造物の振動抑制の効果
は、一方のアームに一端が構造物に接続したアクチュエ
ータを接続し、アームの往復運動を構造物の振動に応じ
て調整し、重りの、時刻毎の振幅や周期を調整しながら
構造物に制震力を与えることにより高められる。
The effect of suppressing the vibration of the structure by the vibration control device is that an actuator having one end connected to the structure is connected to one arm, and the reciprocating motion of the arm is adjusted according to the vibration of the structure, It can be increased by applying seismic control force to the structure while adjusting the amplitude and period at each time.

【0010】またアクチュエータに代えて、またはアク
チュエータと共にアームに減衰機を接続することにより
揺れの発生と同時に構造物に減衰力が与えられ、制震の
効果が上がる。特に減衰機をアクチュエータと共に接続
することにより、振動が小さい場合にはアクチュエータ
を作動させ、大きい場合には減衰機を作動させる等、振
動の規模に応じた効率的な制震が行える。
By connecting a damper to the arm instead of the actuator or together with the actuator, a damping force is applied to the structure at the same time as the occurrence of sway, and the effect of vibration control is enhanced. In particular, by connecting the attenuator together with the actuator, the actuator can be operated when the vibration is small, and the attenuator can be operated when the vibration is large, so that efficient vibration control according to the scale of the vibration can be performed.

【0011】重りの振動周期はまた、アーム,または懸
垂棒を重りの振動に伴って軸方向に伸縮させることによ
っても時々刻々と調整され、この場合にも重りに、応答
の低減に最適な周期が与えられることにより制震の効果
が高められる。
The vibration cycle of the weight is also adjusted momentarily by expanding or contracting the arm or the suspension rod in the axial direction in accordance with the vibration of the weight. In this case, the weight also has an optimum cycle for reducing the response. Is given, the effect of seismic control is enhanced.

【0012】[0012]

【実施例】以下本発明を一実施例を示す図面に基づいて
説明する。
DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings showing an embodiment.

【0013】この発明の制震装置1は図1に示すように
構造物7に水平軸21回りに回転自在に支持される、並列
するアーム2,2と、両アーム2,2に水平軸21回りに
回転自在に接続される連結リンク3と、連結リンク3の
中間部から懸垂する懸垂棒5の先端に接続される重り6
とから構成され、構造物7の振動によるアーム2,2の
回転運動に伴い、重り6が振動して構造物7の振動エネ
ルギーを消費し、揺れを抑制するものである。制震装置
1は構造物7に直接,または構造物7内等に組み立てら
れるフレームに設置される。構造物7内に直接設置され
る場合に、重り6が図示するようにアーム2の水平軸21
より下方に位置する場合には床に開口部が形成されるこ
とにより制震装置1は任意の階に設置される。
As shown in FIG. 1, the vibration control device 1 according to the present invention has parallel arms 2 and 2 which are rotatably supported on a structure 7 about a horizontal axis 21, and both arms 2 and 2 have a horizontal axis 21. A connecting link 3 that is rotatably connected around and a weight 6 that is connected to the tip of a suspension bar 5 that is suspended from the intermediate portion of the connecting link 3.
The weight 6 vibrates with the rotational movement of the arms 2 and 2 due to the vibration of the structure 7, consumes the vibration energy of the structure 7, and suppresses the shaking. The vibration control device 1 is installed directly on the structure 7 or on a frame assembled in the structure 7 or the like. When the weight 6 is installed directly in the structure 7, the horizontal axis 21 of the arm 2 as shown in FIG.
When it is located below, the vibration control device 1 is installed on an arbitrary floor because an opening is formed on the floor.

【0014】アーム2,2は構造物7にピン接合され、
連結リンク3とも互いにピン接合されることにより門形
のリンク装置を構成し、両アーム2,2の水平軸21回り
の往復回転運動によって連結リンク3を揺動させ、重り
6に振動を生じさせる。
The arms 2 and 2 are pin-joined to the structure 7,
The connection link 3 is also pin-joined to each other to form a gate-shaped link device, and the connection link 3 is swung by the reciprocating rotary motion of the arms 2 and 2 around the horizontal axis 21 to cause the weight 6 to vibrate. .

【0015】懸垂棒5の一端は連結リンク3に固定さ
れ、連結リンク3と常に一定の角度を保ったまま振動す
る。
One end of the suspension bar 5 is fixed to the connecting link 3 and vibrates while keeping a constant angle with the connecting link 3.

【0016】重り6は懸垂棒5の、連結リンク3との接
続点の延長線上にある、軌跡の曲率中心である仮想の支
点回りに、その支点と懸垂棒5の先端までの距離を振り
子長さとする振り子として振動する。仮想の支点、すな
わち振り子長さは連結リンク3の揺動とともに変動し、
重り6の軌跡は鉛直に懸垂した位置付近で直線に近い曲
線を描く。図3は重り6が図2に示す、アーム2の水平
軸21より下方に位置する場合の重り6の中心の軌跡を示
している。
The weight 6 is located around an imaginary fulcrum which is the center of curvature of the locus on the extension of the connection point of the suspension bar 5 with the connecting link 3, and the distance from the fulcrum to the tip of the suspension bar 5 is the pendulum length. It vibrates as a pendulum. The imaginary fulcrum, that is, the pendulum length changes as the connecting link 3 swings,
The trajectory of the weight 6 draws a curve that is close to a straight line near the vertically suspended position. FIG. 3 shows the locus of the center of the weight 6 when the weight 6 is located below the horizontal axis 21 of the arm 2 shown in FIG.

【0017】重り6の軌跡は懸垂棒5の長さの他、アー
ム2や連結リンク3の長さによって変わるため重り6の
固有周期はこれらの長さを変えることによって自由に調
整される。図4は図2に示すように重り6の中心とアー
ム2の水平軸21間の鉛直距離L1を変化させた場合の、重
り6の固有周期の差を示したものである。
Since the trajectory of the weight 6 changes depending on the length of the suspension rod 5 as well as the length of the arm 2 and the connecting link 3, the natural period of the weight 6 can be freely adjusted by changing these lengths. FIG. 4 shows the difference in the natural period of the weight 6 when the vertical distance L 1 between the center of the weight 6 and the horizontal axis 21 of the arm 2 is changed as shown in FIG.

【0018】図1では一方のアーム2に、その往復運動
を調整することにより重り6の振動を調整するアクチュ
エータ4を接続した場合を示しているが、アクチュエー
タ4の接続によって本制震装置1は構造物7の振動吸収
に能動的に機能する。アクチュエータ4はアーム2に水
平軸21回りの回転を生じさせる方向に架設され、一端が
構造物7に、他端がアーム2に共に回転自在に接続され
る。
Although FIG. 1 shows a case in which an actuator 4 for adjusting the vibration of the weight 6 by adjusting the reciprocating motion thereof is connected to one arm 2, the vibration damping device 1 is connected by the connection of the actuator 4. It actively functions to absorb the vibration of the structure 7. The actuator 4 is erected in a direction that causes the arm 2 to rotate about a horizontal axis 21, and one end thereof is rotatably connected to the structure 7 and the other end to the arm 2 together.

【0019】アクチュエータ4は構造物7の振動と重り
6の振動に基づく、コンピュータの指令による構造物7
の振動低減に最適な往復運動をアーム2に生じさせ、重
り6の、時刻毎の振幅や周期を調整することにより構造
物7に制震力を与え、時々刻々と変化する振動を時刻毎
に抑制する。
The actuator 4 is a structure 7 that is instructed by a computer based on the vibration of the structure 7 and the vibration of the weight 6.
The arm 2 is caused to make a reciprocating motion optimal for reducing the vibration of the weight, and the amplitude and the cycle of the weight 6 are adjusted at each time to give a damping force to the structure 7, and a vibration that changes from moment to moment is generated. Suppress.

【0020】アクチュエータ4はまた、構造物7の揺れ
が小さく、重り6に振動が発生しない場合に、アーム2
を積極的に運動させることにより早期に構造物7の振動
を抑制する他、重り6の振動時にアーム2と連結リンク
3からなるリンク装置を安定させて支持する役目を持
つ。
The actuator 4 also has a structure in which the swing of the structure 7 is small, and when the weight 6 does not vibrate, the arm 2
By virtue of the positive movement of the structure 7, the vibration of the structure 7 is suppressed at an early stage, and the link device including the arm 2 and the connecting link 3 is stably supported when the weight 6 vibrates.

【0021】アクチュエータ4の代わりに、またはアク
チュエータ4と共に減衰機8をアーム2に接続すること
により同様の機構で、構造物7に減衰力を与えることに
よる制震も行える。図5はアーム2にアクチュエータ4
と減衰機8を接続した場合を示すが、両者を同時に接続
することによりアクチュエータ4と減衰機8を選択的に
機能させることができ、構造物7の揺れが小さいときは
アクチュエータ4によって、大きいときは減衰機8によ
って制震し、揺れの程度に応じて効果的に制震すること
が可能である。この場合、アクチュエータ4と減衰機8
は両者に接続した揺れ検知装置9からの指令によって作
動する。減衰機8はアーム2の運動によって自動的に作
動するため動力は不要である。
A damping mechanism 8 may be connected to the arm 2 instead of the actuator 4 or together with the actuator 4 to perform a vibration control by applying a damping force to the structure 7 by a similar mechanism. FIG. 5 shows the arm 2 and the actuator 4
And the attenuator 8 are connected, the actuator 4 and the attenuator 8 can be selectively operated by connecting the both at the same time. Is damped by the attenuator 8 and can be effectively damped according to the degree of shaking. In this case, the actuator 4 and the attenuator 8
Operates by a command from the shake detection device 9 connected to both. Since the attenuator 8 is automatically operated by the movement of the arm 2, no power is required.

【0022】重り6の時刻毎の振動周期はまた、図1に
示すようにアーム2や懸垂棒5を軸方向に伸縮自在に
し、重り6の振動と同時に伸縮させることによっても調
整され、この場合、アーム2や懸垂棒5は単独で、また
はアクチュエータ4と組み合わせられて作動し、制震の
効果を高める。
The time-dependent vibration cycle of the weight 6 is also adjusted by making the arm 2 and the suspension rod 5 extend and retract in the axial direction as shown in FIG. , The arm 2 and the suspension rod 5 operate independently or in combination with the actuator 4 to enhance the effect of vibration control.

【0023】[0023]

【発明の効果】この発明は以上の通りであり、互いに回
転自在に連結され、門形に組み立てられた、アームと連
結リンクからなるリンク装置を利用して重りを振動させ
ることにより重りに、実質的に懸垂した距離より大きい
振り子長さを与えたものであるため、装置の高さを抑え
ながら振り子の周期を長期化することができる。
The present invention is as described above, and by vibrating the weight by utilizing the link device composed of the arm and the connecting link, which are rotatably connected to each other and are assembled in a gate shape, the weight is substantially vibrated. Since the pendulum length is larger than the suspended distance, the pendulum cycle can be extended while suppressing the height of the device.

【0024】また一方のアームにアクチュエータを接続
してアームの往復運動を調整する、またはアームの長さ
や、連結リンクから重りまでの距離を変化させることに
より重りの、時刻毎の振幅や周期が調整されるため構造
物の振動抑制に最適な制震力を得ることができる。
An actuator is connected to one of the arms to adjust the reciprocating motion of the arm, or the length of the arm and the distance from the connecting link to the weight are changed to adjust the amplitude and the cycle of the weight. Therefore, it is possible to obtain the optimal seismic control force for suppressing the vibration of the structure.

【0025】アクチュエータの代わりに減衰機を接続す
ることにより減衰力による制震も可能で、アクチュエー
タと共に接続した場合には揺れの程度に応じた効果的な
制震を行うことができる。
By connecting a damper instead of the actuator, damping by damping force is possible, and when connected together with the actuator, effective damping according to the degree of shaking can be performed.

【0026】加えてリンク装置と重りのみから構成され
るため構造が簡素であり、高い組立精度や細かい調整も
必要とせず、また構成部材の連結がピン接合であるため
部材間の力の損失やノイズの発生がない。
In addition, the structure is simple because it is composed only of the link device and the weight, high assembly precision and fine adjustment are not required, and since the connection of the constituent members is a pin joint, loss of force between the members and No noise is generated.

【図面の簡単な説明】[Brief description of drawings]

【図1】制震装置の構成例を示した立面図である。FIG. 1 is an elevational view showing a configuration example of a vibration control device.

【図2】x−y座標上の重りの軌跡の一部を示した立面
図である。
FIG. 2 is an elevation view showing a part of a trajectory of a weight on xy coordinates.

【図3】図2に示す重りの軌跡を拡大して示したグラフ
である。
FIG. 3 is an enlarged graph showing the trajectory of the weight shown in FIG.

【図4】連結リンクから重りまでの距離を変えた場合
の、装置の固有周期の変化を示したグラフである。
FIG. 4 is a graph showing changes in the natural period of the device when the distance from the connecting link to the weight is changed.

【図5】アームにアクチュエータと共に減衰機を接続し
た制震装置を示した立面図である。
FIG. 5 is an elevational view showing a vibration control device in which an actuator and an attenuator are connected to an arm.

【符号の説明】[Explanation of symbols]

1……制震装置、2……アーム、21……水平軸、3……
連結リンク、4……アクチュエータ、5……懸垂棒、6
……重り、7……構造物、8……減衰機、9……揺れ検
知装置。
1 ... Vibration control device, 2 ... Arm, 21 ... Horizontal axis, 3 ...
Connection link, 4 ... Actuator, 5 ... Suspension rod, 6
…… Weight, 7 …… Structure, 8 …… Attenuator, 9 …… Vibration detection device.

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 構造物に水平軸回りに回転自在に支持さ
れる、並列するアームと、両アームに水平軸回りに回転
自在に接続される連結リンクと、連結リンクの中間部か
ら懸垂する懸垂棒の先端に接続される重りとから構成さ
れる振り子式制震装置。
1. A parallel arm rotatably supported by a structure around a horizontal axis, a connecting link rotatably connected to both arms around a horizontal axis, and a suspension hanging from an intermediate portion of the connecting link. A pendulum type vibration control device consisting of a weight connected to the tip of a rod.
【請求項2】 一方のアームには一端が構造物に接続
し、アームに水平軸回りの回転を生じさせるアクチュエ
ータが接続されていることを特徴とする請求項1記載の
振り子式制震装置。
2. The pendulum type vibration damping device according to claim 1, wherein one arm is connected to the structure at one end, and an actuator for causing rotation about a horizontal axis is connected to the arm.
【請求項3】 アームにはアクチュエータに代えて、ま
たはアクチュエータと共に減衰機が接続されていること
を特徴とする請求項2記載の振り子式制震装置。
3. The pendulum type vibration damping device according to claim 2, wherein a damper is connected to the arm instead of or together with the actuator.
【請求項4】 アーム,または懸垂棒は重りの振動に伴
って軸方向に伸縮することを特徴とする請求項1乃至請
求項3のいずれかに記載の振り子式制震装置。
4. The pendulum type vibration damping device according to claim 1, wherein the arm or the suspension rod expands and contracts in the axial direction with the vibration of the weight.
JP5048098A 1993-03-09 1993-03-09 Pendulum type vibration control device Expired - Lifetime JP2674459B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5048098A JP2674459B2 (en) 1993-03-09 1993-03-09 Pendulum type vibration control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5048098A JP2674459B2 (en) 1993-03-09 1993-03-09 Pendulum type vibration control device

Publications (2)

Publication Number Publication Date
JPH06264960A true JPH06264960A (en) 1994-09-20
JP2674459B2 JP2674459B2 (en) 1997-11-12

Family

ID=12793847

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
JP (1) JP2674459B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999009278A1 (en) * 1997-08-13 1999-02-25 Plandesign International Llc Earthquake protection consisting of vibration-isolated mounting of buildings and objects using virtual pendulums with long cycles
JP2014177999A (en) * 2013-03-15 2014-09-25 Mitsubishi Heavy Ind Ltd Long period vibration control device
WO2018099896A1 (en) * 2016-11-29 2018-06-07 Burkhard Dahl Compact spatial ellipsoid mass pendulum
CN113529357A (en) * 2020-04-22 2021-10-22 青岛胶南海尔洗衣机有限公司 Washing machine shock attenuation buffer unit and washing machine

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Publication number Priority date Publication date Assignee Title
JPS6357838U (en) * 1986-10-02 1988-04-18
JPS63125241U (en) * 1987-02-09 1988-08-16
JPH01275866A (en) * 1988-04-26 1989-11-06 Kajima Corp Active type vibration control device
JPH02292545A (en) * 1989-05-08 1990-12-04 Mitsubishi Heavy Ind Ltd Damping device
JPH04140371A (en) * 1990-10-01 1992-05-14 Mitsubishi Heavy Ind Ltd Pendulum type longer period vibration controller

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6357838U (en) * 1986-10-02 1988-04-18
JPS63125241U (en) * 1987-02-09 1988-08-16
JPH01275866A (en) * 1988-04-26 1989-11-06 Kajima Corp Active type vibration control device
JPH02292545A (en) * 1989-05-08 1990-12-04 Mitsubishi Heavy Ind Ltd Damping device
JPH04140371A (en) * 1990-10-01 1992-05-14 Mitsubishi Heavy Ind Ltd Pendulum type longer period vibration controller

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999009278A1 (en) * 1997-08-13 1999-02-25 Plandesign International Llc Earthquake protection consisting of vibration-isolated mounting of buildings and objects using virtual pendulums with long cycles
EA002391B1 (en) * 1997-08-13 2002-04-25 ПЛАНДИЗАЙН ИНТЕРНЕШЕНЭЛ ЭлЭлСи Earthquake protection consisting of vibration-isolated mounting of buildings and objects using vertical pendulums with long cycles
AU751206B2 (en) * 1997-08-13 2002-08-08 Plandesign International Llc Earthquake protection consisting of vibration-isolated mounting of buildings and objects using virtual pendulums with long cycles
US6966154B1 (en) 1997-08-13 2005-11-22 Plandesign International Llc Earthquake protection consisting of vibration-isolated mounting of buildings and objects using virtual pendulums with long cycles
CZ298103B6 (en) * 1997-08-13 2007-06-20 Plandesign International Llc Method of protecting buildings and objects from dynamic forces caused by acceleration of foundation plate, for instance due to earthquake and apparatus for making the same
JP2014177999A (en) * 2013-03-15 2014-09-25 Mitsubishi Heavy Ind Ltd Long period vibration control device
WO2018099896A1 (en) * 2016-11-29 2018-06-07 Burkhard Dahl Compact spatial ellipsoid mass pendulum
US11255395B2 (en) 2016-11-29 2022-02-22 Burkhard Dahl Compact spatial ellipsoidal mass pendulum
CN113529357A (en) * 2020-04-22 2021-10-22 青岛胶南海尔洗衣机有限公司 Washing machine shock attenuation buffer unit and washing machine

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