JP2003336683A - Method for setting characteristic frequency of damping body in damping device - Google Patents
Method for setting characteristic frequency of damping body in damping deviceInfo
- Publication number
- JP2003336683A JP2003336683A JP2002147966A JP2002147966A JP2003336683A JP 2003336683 A JP2003336683 A JP 2003336683A JP 2002147966 A JP2002147966 A JP 2002147966A JP 2002147966 A JP2002147966 A JP 2002147966A JP 2003336683 A JP2003336683 A JP 2003336683A
- Authority
- JP
- Japan
- Prior art keywords
- natural frequency
- elastic structure
- vibration
- connecting rod
- spring
- 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
Landscapes
- Vibration Prevention Devices (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は吊橋のタワー、超高
層ビルディング、タワー、鉄塔等の構造物の上部に設置
して、これら構造物の風荷重や地震による振動（揺動）
を抑えて早期に振動を減衰させるために用いる制振装置
における制振体の固有振動数設定方法に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is installed on the upper part of a structure such as a tower of a suspension bridge, a super high-rise building, a tower, an iron tower, etc., and these structures are vibrated (swing) by wind load or earthquake.
The present invention relates to a method for setting a natural frequency of a damping body in a damping device that is used to suppress the vibration and quickly damp the vibration.
【０００２】[0002]
【従来の技術】従来におけるこの種制振装置としては、
図１０にその一例の概略を示す如く、構造物１の上面
に、該構造物１が揺れる方向と平行にガイドレール２を
敷設すると共に、該ガイドレール２上に、錘りである制
振体３を、ガイドレール２に沿って水平方向へ移動でき
るように車輪４を介して載置し、且つ該制振体３の移動
方向の一端側の構造物１上に立てた支持フレーム５と制
振体３の一端面との間に、制振体３の運動エネルギーを
減衰させるための減衰機（ダンパ）６と制振体３の固有
振動数を調節するためのばね７とを介装した構成とした
ものがあり、構造物１に揺れが発生すると、その揺れエ
ネルギーが制振体３に伝えられるため、制振体３は構造
物１の揺れに対し９０度遅れの位相でガイドレール２上
を反復移動させられることになり、このとき、制振体３
の運動エネルギーが減衰機６で減衰させられる結果、構
造物１の揺れが抑えられるようにしてある。2. Description of the Related Art As a conventional vibration damping device of this type,
As shown in the outline of one example in FIG. 10, a guide rail 2 is laid on the upper surface of the structure 1 in parallel with the direction in which the structure 1 swings, and a damping body which is a weight is provided on the guide rail 2. 3 is mounted via wheels 4 so as to be movable horizontally along the guide rails 2, and is supported by a support frame 5 and a support frame 5 which are erected on the structure 1 at one end side in the moving direction of the vibration damper 3. A damper (damper) 6 for attenuating the kinetic energy of the vibration damping body 3 and a spring 7 for adjusting the natural frequency of the vibration damping body 3 are provided between the one end surface of the vibration damping body 3. There is a structure, and when the structure 1 shakes, the shaking energy is transmitted to the damping body 3, so that the damping body 3 is delayed by 90 degrees with respect to the shaking of the structure 1 in the guide rail 2 It will be repeatedly moved above, and at this time, the vibration control unit 3
As a result of the kinetic energy of 1 being attenuated by the attenuator 6, the swaying of the structure 1 is suppressed.
【０００３】[0003]
【発明が解決しようとする課題】ところが、かかる制振
装置の場合、構造物１に最適な制振効果を与えるために
は、制振体３の質量や移動ストローク等を選定し、且つ
制振体３の固有振動数を構造物１の固有振動数に合わせ
て設定することが必要であるが、その設定調整が非常に
面倒であるという問題がある。However, in the case of such a vibration damping device, in order to provide the structure 1 with the optimum vibration damping effect, the mass and moving stroke of the vibration damping body 3 are selected and the vibration damping is performed. It is necessary to set the natural frequency of the body 3 according to the natural frequency of the structure 1, but there is a problem that the setting adjustment is very troublesome.
【０００４】すなわち、上記制振装置において、制振体
３の質量をｍ、固有振動数調整用のばね７のばね定数を
ｋ、制振体３の振動を減衰させる減衰機６の減衰力（制
御力）をｃとすると、制振体３の固有振動数ω０は、ω
０=√（ｋ／ｍ）、減衰係数比μは、μ=ｃ／２√（ｍ
ｋ）となる。ここで、制振体３の固有振動数ω０を変更
する場合、ばね７のばね定数をｋからｋ１にすれば、ω
０´=√（ｋ１／ｍ）となり、変更することができる
が、構造物１の固有振動数が設計どおりに得られている
とは限らないので、ばね定数の異なるばね７を複数本用
意しておいて、構造物１の実際の固有振動数に対応する
固有振動数が得られるばね７を選定する必要があり、
又、構造物１の固有振動数の変化に応じて、制振体３の
固有振動数を調整する必要が生じたときには、その都
度、ばね定数の異なるばね７に交換しなければならな
い、という問題がある。That is, in the above vibration damping device, the mass of the vibration damping body 3 is m, the spring constant of the spring 7 for adjusting the natural frequency is k, and the damping force of the damping machine 6 for damping the vibration of the vibration damping body 3 ( If the control force) is c, the natural frequency ω 0 of the damping body 3 is ω
0 = √ (k / m), the damping coefficient ratio μ is μ = c / 2√ (m
k). Here, when changing the natural frequency ω 0 of the vibration damper 3, if the spring constant of the spring 7 is changed from k to k 1 , ω
0 ′ = √ (k 1 / m), which can be changed, but since the natural frequency of the structure 1 is not always obtained as designed, multiple springs 7 with different spring constants are prepared. Therefore, it is necessary to select the spring 7 that can obtain the natural frequency corresponding to the actual natural frequency of the structure 1.
Further, when it becomes necessary to adjust the natural frequency of the vibration damper 3 according to the change in the natural frequency of the structure 1, the spring 7 having a different spring constant must be replaced each time. There is.
【０００５】一方、ばねのばね定数に依らずに制振体の
固有振動数を設定できるようにした制振装置としては、
図１１に概略を示す如く、底面をＶ字状に形成した制振
体８を、構造物１上に離隔させて設置した２個所の支持
ローラ９上に、ライナープレート１０を介して揺動自在
に載置して、制振体８を等価的に単振子に類似した制振
装置としたものがあるが、この制振装置の場合、制振体
８の固有振動数を調整するためには、ライナープレート
１０を厚みの異なるものと交換する必要があり、この作
業には、現場で油圧ジャッキや、レバーブロック、チェ
ーンブロック等の大掛かりな装置、工具が必要で、非常
に手間が掛かるという問題がある。On the other hand, as a vibration damping device in which the natural frequency of the vibration damping member can be set without depending on the spring constant of the spring,
As shown schematically in FIG. 11, a vibration control body 8 having a V-shaped bottom surface is swingable via two liner plates 10 on two support rollers 9 installed on the structure 1 at a distance from each other. There is a vibration damping device equivalent to a simple pendulum that is mounted on the vibration damping device 8. However, in the case of this vibration damping device, in order to adjust the natural frequency of the vibration damping device 8, , It is necessary to replace the liner plate 10 with one having a different thickness, and this work requires a large-scale device and tools such as a hydraulic jack, a lever block and a chain block on site, which is very troublesome. There is.
【０００６】そこで、本発明は、制振体を水平方向へ反
復移動させるようにしてある制振装置において、制振体
の固有振動数の設定調整を容易に行うことができるよう
な制振体固有振動数設定方法を提供しようとするもので
ある。In view of this, the present invention provides a vibration damping device in which the vibration damping member is repeatedly moved in the horizontal direction so that the natural frequency of the vibration damping member can be easily adjusted. It is intended to provide a natural frequency setting method.
【０００７】[0007]
【課題を解決するための手段】本発明は、上記課題を解
決するために、構造物上に水平方向へ反復移動させるよ
うに載置してある制振体と構造物との間に、上下方向に
張力が作用するように弾性構造体を取り付け、該弾性構
造体の初期張力を調整することにより制振体の固有振動
数を設定するようにする。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, according to the present invention, a vertical structure is provided between a structure and a vibration damper mounted on the structure so as to be repeatedly moved in the horizontal direction. The elastic structure is attached so that tension acts in the direction, and the natural frequency of the vibration damper is set by adjusting the initial tension of the elastic structure.
【０００８】上下方向に配した弾性構造体自体の初期張
力は任意に調整できるので、制振体の固有振動数を容易
に設定することができる。Since the initial tension of the elastic structure itself arranged in the vertical direction can be arbitrarily adjusted, the natural frequency of the vibration damper can be easily set.
【０００９】又、弾性構造体を、ばねと、長さを可変調
整できる連結用ロッドとを有する弾性構造体とし、上記
連結用ロッドの長さを変えることにより初期張力を調整
するようにしたり、あるいは弾性構造体を、ばねと連結
用ロッドとを有する弾性構造体として、連結用ロッドの
反ばね側の端部に取り付けた支持プレートを制振体又は
構造物に固定したブラケットに重ね合わせて回動自在に
連結し、支持プレートとブラケットとの連結位置を変え
ることにより初期張力を調整するようにすることによっ
て、制振体の固有振動数を構造物の固有振動数に合わせ
て最適値に設定することができる。Further, the elastic structure is an elastic structure having a spring and a connecting rod whose length can be variably adjusted, and the initial tension can be adjusted by changing the length of the connecting rod. Alternatively, the elastic structure is used as an elastic structure having a spring and a connecting rod, and a support plate attached to an end of the connecting rod on the side opposite to the spring is superposed on a bracket fixed to the vibration suppressor or the structure. The natural frequency of the vibration damper is set to the optimal value according to the natural frequency of the structure by movably connecting and adjusting the initial tension by changing the connecting position between the support plate and the bracket. can do.
【００１０】[0010]
【発明の実施の形態】以下、本発明の実施の形態を図面
を参照して説明する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.
【００１１】図１は本発明の実施の一形態を示すもの
で、構造物１の上面に、矩形フレーム形状としたベース
架台１１を据え付け、該ベース架台１１上の前後両側位
置に、構造物１の揺れ方向となる左右方向（矢印Ｘ方
向）に沿ってガイドレール２を平行に敷設すると共に、
該両ガイドレール２上に、錘りである制振体３を車輪４
を介して左右方向へ移動自在に載置し、且つ上記ベース
架台１１の左右方向一端部の前後方向中央部に立てた支
持フレーム５と制振体３の一端面との間に減衰機６が介
装してある制振装置において、上記ガイドレール２の長
手方向中間位置となる制振体３の中立位置での該制振体
３のたとえば下面中央部と、その真下に位置する構造物
１との間に、固有振動数調整用の弾性構造体１２を、上
下方向に張力が作用するように且つベース架台１１、ガ
イドレール２と干渉することのないように鉛直に取り付
けて、該弾性構造体１２の初期張力Ｆを調整することに
より制振体３の固有振動数を設定するようにする。FIG. 1 shows an embodiment of the present invention. A rectangular frame-shaped base stand 11 is installed on the upper surface of the structure 1, and the structure 1 is placed at both front and rear positions on the base stand 11. While laying the guide rails 2 in parallel along the left-right direction (direction of arrow X) which is the swinging direction of
On both of the guide rails 2, a damping body 3 which is a weight is mounted on a wheel 4
The attenuator 6 is mounted between the support frame 5 and one end surface of the vibration damper 3 which are movably mounted in the left-right direction via the base frame 11 and are erected at the center part in the front-rear direction of the one end in the left-right direction of the base stand 11. In the interposed vibration damping device, for example, the central portion of the lower surface of the vibration damping body 3 at a neutral position of the vibration damping body 3 which is an intermediate position in the longitudinal direction of the guide rail 2 and the structure 1 located immediately below the central portion. And the elastic structure 12 for adjusting the natural frequency is vertically attached so that tension acts in the vertical direction and does not interfere with the base pedestal 11 and the guide rail 2. The natural frequency of the damping body 3 is set by adjusting the initial tension F of the body 12.
【００１２】上記弾性構造体１２は、図２に拡大して示
す如く、構造物１上に固設したブラケット１３にリンク
部材１４の下端部をピン１５により左右方向へ回動自在
に取り付けて、該リンク部材１４の上端部に下端部を係
止させて上下方向に配した引張コイルばね１６と、該引
張コイルばね１６の上端部と制振体３の下面に固定した
ブラケット１９とを連結するターンバックル付連結用ロ
ッド１８とからなり、該ターンバックル付連結用ロッド
１８は、上端にアイプレート１７ａを有し且つ下端部に
ねじ部２１ａを有するロッド１８ａと、下端にアイプレ
ート１７ｂを有し且つ上端部にねじ部２１ａとは逆向き
のねじ部２１ｂを有するロッド１８ｂの各ねじ部２１
ａ，２１ｂにターンバックル２２を螺合させてなる構成
としてあり、ロッド１８ｂの下端のアイプレート１７ｂ
に上記引張コイルばね１６の上端を係止させ、更に、ロ
ッド１８ａの上端のアイプレート１７ａを、制振体３の
下面のブラケット１９にピン２０により左右方向へ回動
自在に取り付けるようにし、上記ターンバックル２２の
回転操作で連結用ロッド１８の長さを変えることにより
引張コイルばね１６の引張反力としての撓み量を変更で
きるようにしてある。As shown in the enlarged view of FIG. 2, the elastic structure 12 has a lower end portion of a link member 14 attached to a bracket 13 fixedly mounted on the structure 1 by a pin 15 so as to be rotatable in the left-right direction. A tension coil spring 16 arranged vertically with its lower end locked to the upper end of the link member 14 and a bracket 19 fixed to the lower surface of the vibration damper 3 and the upper end of the tension coil spring 16 are connected. The connecting rod 18 with a turnbuckle comprises a rod 18a having an eye plate 17a at its upper end and a threaded portion 21a at its lower end, and an eye plate 17b at its lower end. Further, each threaded portion 21 of the rod 18b having a threaded portion 21b opposite to the threaded portion 21a at the upper end portion
The turnbuckle 22 is screwed to a and 21b, and the eye plate 17b at the lower end of the rod 18b is provided.
The upper end of the tension coil spring 16 is locked to the above, and the eye plate 17a at the upper end of the rod 18a is attached to the bracket 19 on the lower surface of the vibration damper 3 by a pin 20 so as to be rotatable in the left-right direction. By changing the length of the connecting rod 18 by rotating the turnbuckle 22, the amount of bending of the tension coil spring 16 as a tension reaction force can be changed.
【００１３】制振体３の固有振動数を構造物１の固有振
動数に合わせるように設定調整する場合は、弾性構造体
１２における連結用ロッド１８に装備させてあるターン
バックル２２を回転操作して連結用ロッド１８の長さを
変化させ、これにより引張コイルばね１６の撓み量に基
づく弾性構造体１２全体の初期張力Ｆを調整して、制振
体３の固有振動数を設定するようにする。When setting and adjusting the natural frequency of the vibration damper 3 to match the natural frequency of the structure 1, the turnbuckle 22 mounted on the connecting rod 18 of the elastic structure 12 is rotated. By changing the length of the connecting rod 18, the initial tension F of the entire elastic structure 12 based on the bending amount of the tension coil spring 16 is adjusted, and the natural frequency of the vibration damper 3 is set. To do.
【００１４】上記の状態において、空気力等により構造
物１に揺れが発生すると、その揺れエネルギーは制振体
３に伝達されるため、制振体３が水平方向に移動する運
動エネルギーに変換され、そのエネルギーが減衰機６で
消費される、という間接的なエネルギー消費形式によっ
て構造物１の揺れが速やかに抑えられる。この際、構造
物１への制振力は、制振体３の質量、移動ストローク、
固有振動数を選定することにより最適に得られるが、固
有振動数調整用の弾性構造体１２が制振体３と構造物１
との間に上下方向に取り付けてあって、制振体３が左右
方向へ移動すると、該弾性構造体１２は下端部のピン１
５を支点に斜め左右方向に引き伸ばされて復元するとき
の水平分力を制振体３に作用させることになる。そのた
め、図１０に示したばね７の如く水平方向に伸縮する場
合に比して引張コイルばね１６の撓み量（伸び量）が少
ないことから、制振体３の動きを制約することはなく、
又、上下方向の弾性構造体１２の初期張力Ｆは任意に調
整できるので、制振体３の固有振動数を構造物１の固有
振動数に容易に合わせることができる。なお、上記引張
コイルばね１６は、鉛直状態から斜め方向に引き伸ばさ
れても張力は変わらないので、長さ変動分を許容できる
だけの長さを有するものを使用すればよい。In the above state, when the structure 1 shakes due to aerodynamic force or the like, the shaking energy is transmitted to the vibration suppressor 3 and is converted into kinetic energy for moving the vibration suppressor 3 in the horizontal direction. The swing of the structure 1 is promptly suppressed by the indirect energy consumption form in which the energy is consumed by the attenuator 6. At this time, the damping force applied to the structure 1 depends on the mass of the damping body 3, the moving stroke,
Although it is optimally obtained by selecting the natural frequency, the elastic structure 12 for adjusting the natural frequency is the damping body 3 and the structure 1.
When the vibration damper 3 is moved in the horizontal direction, the elastic structure 12 is attached to the pin 1 at the lower end.
The horizontal component force when being slanted in the left-right direction and restored by using 5 as a fulcrum acts on the vibration-damping body 3. Therefore, since the bending amount (extension amount) of the tension coil spring 16 is small as compared with the case of expanding and contracting in the horizontal direction like the spring 7 shown in FIG. 10, the movement of the vibration damping body 3 is not restricted.
Moreover, since the initial tension F of the elastic structure 12 in the vertical direction can be arbitrarily adjusted, the natural frequency of the vibration damper 3 can be easily matched with the natural frequency of the structure 1. The tension coil spring 16 does not change in tension even when it is stretched in an oblique direction from the vertical state. Therefore, it is sufficient to use a spring having a length that allows the length variation.
【００１５】上記において、弾性構造体１２の引張コイ
ルばね１６と制振体３に作用する復元力との関係は、た
とえば、引張コイルばね１６の自由長さが６００ｍｍ、
ばね定数が７５５Ｎ／ｍｍ、制振体３の質量が３０００
ｋｇとした場合、図３に一例を示す如くなる。又、引張
コイルばね１６と制振体３の固有振動数との関係は、図
４に一例を示す如くであり、図４から、引張コイルばね
１６の撓み量を３０〜７０ｍｍの範囲で変更することで
制振体３の固有振動数を概ね０．７〜０．９Ｈｚの範囲
で無段階に調整できることが分る。したがって、制振体
３の固有振動数を構造物１の固有振動数に合わせて最適
値に設定することができると共に、構造物１の固有振動
数の変化に応じて制振体３の固有振動数を再調整する必
要が生じても、従来の如くその都度ばね定数の異なるば
ねに交換するような必要はない。In the above, the relationship between the tension coil spring 16 of the elastic structure 12 and the restoring force acting on the damping body 3 is, for example, that the tension coil spring 16 has a free length of 600 mm,
The spring constant is 755 N / mm, and the mass of the vibration damper 3 is 3000.
When it is set to kg, an example is shown in FIG. The relationship between the tension coil spring 16 and the natural frequency of the damping body 3 is as shown in FIG. 4, and the deflection amount of the tension coil spring 16 is changed within the range of 30 to 70 mm from FIG. Thus, it can be seen that the natural frequency of the vibration damper 3 can be adjusted steplessly in the range of approximately 0.7 to 0.9 Hz. Therefore, the natural frequency of the vibration damper 3 can be set to an optimum value in accordance with the natural frequency of the structure 1, and the natural vibration of the vibration damper 3 can be changed according to the change of the natural frequency of the structure 1. Even if it is necessary to readjust the number, it is not necessary to replace with a spring having a different spring constant each time as in the conventional case.
【００１６】次に、図５は本発明の実施に用いる弾性構
造体１２の他の例を示すもので、図２に示したロッド１
８ｂと引張コイルばね１６に代えて、ピストンロッド２
４と圧縮コイルばね２３を用いたものである。すなわ
ち、ピストン２４ａを収納したシリンダ胴２５の長手方
向の一端壁からピストンロッド２４を出入させるように
して、該シリンダ胴２５内の上記一端壁とピストン２４
ａとの間に、圧縮コイルばね２３を配置し、且つシリン
ダ胴２５から突出するピストンロッド２４の上端部にね
じ部２１ｂを設けて、ロッド１８ａの下端部のねじ部２
１ａとの間に図２に示したと同様にターンバックル２２
を装備させ、シリンダ胴２５の下端となる長手方向の他
端壁外面に固設したアイプレート２６を、ピン１５によ
り構造物１側のブラケット１３に左右方向へ回動自在に
取り付けたものである。その他の構成は図２に示すもの
と同じであり、同一のものには同一符号が付してある。Next, FIG. 5 shows another example of the elastic structure 12 used for carrying out the present invention. The rod 1 shown in FIG.
8b and tension coil spring 16 instead of piston rod 2
4 and the compression coil spring 23 are used. That is, the piston rod 24 is moved in and out from one end wall in the longitudinal direction of the cylinder body 25 accommodating the piston 24a, and the one end wall in the cylinder body 25 and the piston 24
The compression coil spring 23 is arranged between the piston 18 and a, and the threaded portion 21b is provided at the upper end of the piston rod 24 protruding from the cylinder body 25.
1b and the turnbuckle 22 as shown in FIG.
And an eye plate 26 fixed to the outer surface of the other end wall in the longitudinal direction, which is the lower end of the cylinder body 25, is attached to the bracket 13 on the structure 1 side by the pin 15 so as to be rotatable in the left-right direction. . Other configurations are the same as those shown in FIG. 2, and the same components are designated by the same reference numerals.
【００１７】図５に示す弾性構造体１２を用いても、タ
ーンバックル２２の回転操作で圧縮コイルばね２３の圧
縮反力に基づく初期張力を調整することにより、制振体
３の固有振動数を容易に設定調整することができる。Even if the elastic structure 12 shown in FIG. 5 is used, the natural frequency of the vibration damper 3 is adjusted by adjusting the initial tension based on the compression reaction force of the compression coil spring 23 by rotating the turnbuckle 22. The settings can be adjusted easily.
【００１８】次いで、図６は本発明の実施に用いる弾性
構造体１２の更に他の例を示すもので、図５に示した圧
縮コイルばね２３に代えて、皿ばね２７を用いたもので
ある。その他の構成は、図５に示すものと同じであり、
同一のものには同一符号が付してある。Next, FIG. 6 shows still another example of the elastic structure 12 used in the practice of the present invention, in which a disc spring 27 is used instead of the compression coil spring 23 shown in FIG. . Other configurations are the same as those shown in FIG.
The same components are designated by the same reference numerals.
【００１９】図６に示す弾性構造体１２を用いても、タ
ーンバックル２２の回転操作で皿ばね２７の圧縮反力に
基づく初期張力を調整することにより、制振体３の固有
振動数を容易に設定調整することができる。Even if the elastic structure 12 shown in FIG. 6 is used, the natural frequency of the vibration damper 3 can be easily adjusted by adjusting the initial tension based on the compression reaction force of the disc spring 27 by rotating the turnbuckle 22. The setting can be adjusted.
【００２０】更に、図７は本発明の実施に用いる弾性構
造体１２の更に別の例を示すもので、構造物１上に左右
に所要間隔を隔てて支持台２８を設置し、該両支持台２
８上に板ばね２９を担持させるように水平に載置して、
該板ばね２９を支持台２８に固定し、且つ該板ばね２９
の中央部と制振体３の下面との間に、図２に示したもの
と同様な構成としてある連結用ロッド１８を上下方向に
配置して、該連結用ロッド１８の上端のアイプレート１
７ａを、制振体３側のブラケット１９にピン２０により
取り付けると共に、連結用ロッド１８の下端のアイプレ
ート１７ｂを板ばね２９に固設したブラケット３０にピ
ン１５により取り付けたものである。Further, FIG. 7 shows still another example of the elastic structure 12 used in the practice of the present invention, in which a support base 28 is installed on the structure 1 at right and left sides at a required interval and both support Stand 2
8 is placed horizontally so as to carry the leaf spring 29 on
The leaf spring 29 is fixed to a support 28, and the leaf spring 29 is fixed.
The connecting rod 18 having the same structure as that shown in FIG. 2 is vertically arranged between the central portion of the eye plate 1 and the lower surface of the vibration damper 3, and the eye plate 1 at the upper end of the connecting rod 18 is arranged.
7a is attached to the bracket 19 on the damping body 3 side by the pin 20, and the eye plate 17b at the lower end of the connecting rod 18 is attached to the bracket 30 fixed to the leaf spring 29 by the pin 15.
【００２１】図７に示すように構成した弾性構造体１２
の場合は、ターンバックル２２の回転操作で連結用ロッ
ド１８の長さを変化させると、板ばね２９を弾性変形さ
せることができ、その弾性反力を初期張力として与える
ことができるので、この初期張力を調整することによ
り、制振体３の固有振動数を容易に設定調整することが
できる。Elastic structure 12 constructed as shown in FIG.
In the case of, when the length of the connecting rod 18 is changed by rotating the turnbuckle 22, the leaf spring 29 can be elastically deformed and its elastic reaction force can be given as an initial tension. By adjusting the tension, the natural frequency of the vibration damper 3 can be easily set and adjusted.
【００２２】図８は上記弾性構造体１２による初期張力
調整部分の別の例を示すもので、図２、図７に示す連結
用ロッド１８を、ターンバックル２２を廃止した１本構
造とし、且つ該連結用ロッド１８の上端部にアイプレー
ト１７ａを設けることに代えて、上下方向に複数の孔３
１を有する支持プレート１７ｃを取り付け、該支持プレ
ート１７ｃの上記いずれかの孔３１とブラケット１９の
孔１９ａとをボルト３２及びナットにより連結し、この
連結位置を変えることにより初期張力を調整できるよう
にしたものである。又、この図８に示す構成は、図５、
図６に示すものにおいて、ロッド１８ａとターンバック
ル２２に代えて、ピストンロッド２４の上端部に採用す
ることができる。なお、上記複数の孔３１に代えて長孔
としてもよい。FIG. 8 shows another example of the initial tension adjusting portion by the elastic structure 12. The connecting rod 18 shown in FIGS. 2 and 7 has a single structure without the turnbuckle 22, and Instead of providing the eye plate 17a at the upper end of the connecting rod 18, a plurality of holes 3 are provided in the vertical direction.
The support plate 17c having No. 1 is attached, and any one of the holes 31 of the support plate 17c and the hole 19a of the bracket 19 are connected by a bolt 32 and a nut, and the initial tension can be adjusted by changing the connection position. It was done. In addition, the configuration shown in FIG.
In the structure shown in FIG. 6, instead of the rod 18a and the turnbuckle 22, it can be adopted in the upper end portion of the piston rod 24. The holes 31 may be replaced by elongated holes.
【００２３】図８に示すような調整部分により弾性構造
体１２の初期張力を調整しても、制振体３の固有振動数
を設定調整することができる。Even if the initial tension of the elastic structure 12 is adjusted by the adjusting portion as shown in FIG. 8, the natural frequency of the vibration damper 3 can be set and adjusted.
【００２４】なお、上記各実施の形態で示した弾性構造
体１２は、上下逆配置としてもよいこと、又、図９に示
す如く、図１に示した制振体３の下面中央部と構造物１
の上部との間に弾性構造体１２を取り付けることに代え
て、ベース架台１１及び制振体３を取り囲む位置に、固
定部材としての支持架構３３を設置して、制振体３を上
方から吊るように、制振体３のたとえば上面中央部と支
持架構３３の上部ビーム体３３ａとの間に、弾性構造体
１２を上下方向に鉛直に取り付けるようにしてもよいこ
と、更に、構造物１の規模及び制振体３の質量によって
は、弾性構造体１２としてゴムを用いるようにしてもよ
いこと、実施の形態ではパッシブ型の制振装置への適用
例について示したが、アクティブ型の制振装置について
も同様に適用できること、その他本発明の要旨を逸脱し
ない範囲内において種々変更を加え得ることは勿論であ
る。The elastic structure 12 shown in each of the above-mentioned embodiments may be arranged upside down, and, as shown in FIG. 9, the lower surface center portion of the vibration damper 3 shown in FIG. Thing 1
Instead of attaching the elastic structure 12 to the upper part of the above, a support frame 33 as a fixing member is installed at a position surrounding the base pedestal 11 and the damping body 3, and the damping body 3 is hung from above. As described above, the elastic structure 12 may be vertically mounted vertically between, for example, the central portion of the upper surface of the vibration control body 3 and the upper beam body 33a of the support frame 33. Depending on the scale and the mass of the vibration damping body 3, rubber may be used as the elastic structure 12. In the embodiment, the application example to the passive type vibration damping device is shown. It is needless to say that the same can be applied to the device, and various changes can be made without departing from the scope of the present invention.
【００２５】[0025]
【発明の効果】以上述べた如く、本発明の制振装置にお
ける制振体の固有振動数設定方法によれば、次の如き優
れた効果を発揮する。
(1)構造物上に水平方向へ反復移動させるように載置し
てある制振体と構造物との間に、上下方向に張力が作用
するように弾性構造体を取り付け、該弾性構造体の初期
張力を調整することにより制振体の固有振動数を設定す
るようにするので、従来のように複数本のばねを用意す
ることなく制振体の固有振動数を容易に設定調整するこ
とができると共に、再調整も支障なく簡単に行うことが
でき、したがって、現場でも容易に固有振動数設定を行
うことができ、工期の短縮、工費のコストダウンを図る
ことができる。
(2)弾性構造体を、ばねと、長さを可変調整できる連結
用ロッドとを有する弾性構造体とし、上記連結用ロッド
の長さを変えることにより初期張力を調整するようにし
たり、あるいは弾性構造体を、ばねと連結用ロッドとを
有する弾性構造体として、連結用ロッドの反ばね側の端
部に取り付けた支持プレートを制振体又は構造物に固定
したブラケットに重ね合わせて回動自在に連結し、支持
プレートとブラケットとの連結位置を変えることにより
初期張力を調整するようにすることによって、制振体の
固有振動数を構造物の固有振動数に合わせて最適値に設
定することができる。As described above, according to the method of setting the natural frequency of the damping body in the damping device of the present invention, the following excellent effects are exhibited. (1) An elastic structure is attached so that tension is applied in the vertical direction between the structure and the vibration damping body mounted on the structure so as to be repeatedly moved in the horizontal direction. Since the natural frequency of the vibration suppressor is set by adjusting the initial tension of, the natural frequency of the vibration suppressor can be easily set and adjusted without preparing multiple springs as in the past. In addition, the readjustment can be easily performed without any trouble, and therefore the natural frequency can be easily set even at the site, and the construction period can be shortened and the construction cost can be reduced. (2) The elastic structure is an elastic structure having a spring and a connecting rod whose length can be variably adjusted, and the initial tension is adjusted by changing the length of the connecting rod. The structure is an elastic structure having a spring and a connecting rod, and a support plate attached to the end of the connecting rod on the side opposite to the spring side is superposed on a vibration-damping body or a bracket fixed to the structure and is rotatable. To adjust the initial tension by changing the connection position between the support plate and the bracket to set the natural frequency of the damping body to the optimum value according to the natural frequency of the structure. You can
【図１】本発明の制振装置における制振体の固有振動数
設定方法の実施の一形態を示す概要図である。FIG. 1 is a schematic diagram showing an embodiment of a method of setting a natural frequency of a vibration damping body in a vibration damping device of the present invention.
【図２】本発明の実施に用いる弾性構造体の一例を示す
概略図である。FIG. 2 is a schematic view showing an example of an elastic structure used for carrying out the present invention.
【図３】上下方向に取り付けた弾性構造体の引張コイル
ばねと制振体に作用する復元力との関係を示す一例図で
ある。FIG. 3 is an example diagram showing a relationship between a tension coil spring of an elastic structure attached in a vertical direction and a restoring force acting on a vibration damper.
【図４】上下方向に取り付けた弾性構造体の引張コイル
ばねの撓み量と制振体の固有振動数との関係を示す一例
図である。FIG. 4 is an example diagram showing a relationship between a bending amount of a tension coil spring of an elastic structure mounted in a vertical direction and a natural frequency of a vibration suppressor.
【図５】弾性構造体の他の例を示す概略図である。FIG. 5 is a schematic view showing another example of the elastic structure.
【図６】弾性構造体の更に他の例を示す概略図である。FIG. 6 is a schematic view showing still another example of the elastic structure.
【図７】弾性構造体の更に別の例を示す概略図である。FIG. 7 is a schematic view showing still another example of the elastic structure.
【図８】弾性構造体の初期張力調整部分の他の例を示す
概略図である。FIG. 8 is a schematic view showing another example of the initial tension adjusting portion of the elastic structure.
【図９】本発明の変形例を示す概要図である。FIG. 9 is a schematic diagram showing a modified example of the present invention.
【図１０】従来の制振装置の一例を示す概略図である。FIG. 10 is a schematic view showing an example of a conventional vibration damping device.
【図１１】従来の制振装置の他の例を示す概略図であ
る。FIG. 11 is a schematic view showing another example of a conventional vibration damping device.
１ 構造物 ３ 制振体 １２ 弾性構造体 １６ 引張コイルばね（ばね） １７ｃ 支持プレート １８ 連結用ロッド １９ ブラケット ２３ 圧縮コイルばね（ばね） ２７ 皿ばね（ばね） ２９ 板ばね（ばね） 1 structure 3 damping body 12 Elastic structure 16 Tension coil spring (spring) 17c Support plate 18 Connecting rod 19 bracket 23 Compression coil spring (spring) 27 Disc spring (spring) 29 Leaf spring
フロントページの続き (72)発明者 佐藤 文男 東京都江東区豊洲三丁目１番15号 石川島 播磨重工業株式会社東京エンジニアリング センター内 (72)発明者 宇野 名右衛門 東京都江東区毛利一丁目19番10号 石川島 播磨重工業株式会社江東事務所内 (72)発明者 牟田口 勝生 広島県呉市光町五丁目17番地 石川島播磨 重工業株式会社呉新宮工場内 Ｆターム(参考） 3J048 AA05 AB13 AD02 BC02 BE15 BG02 CB23 EA38 Continued front page (72) Inventor Fumio Sato 3-15 Toyosu, Koto-ku, Tokyo Ishikawajima Harima Heavy Industries Tokyo Engineering Co., Ltd. In the center (72) Inventor Uno Naemon 1-19-10 Mori, Koto-ku, Tokyo Ishikawajima Harima Heavy Industries Ltd. Koto Office (72) Inventor Katsuo Mutaguchi 5-17, Hikarimachi, Kure City, Hiroshima Prefecture Harima Ishikawajima Heavy Industry Co., Ltd.Kure Shingu Factory F term (reference) 3J048 AA05 AB13 AD02 BC02 BE15 BG02 CB23 EA38
Claims (3)
うに載置してある制振体と構造物との間に、上下方向に
張力が作用するように弾性構造体を取り付け、該弾性構
造体の初期張力を調整することにより制振体の固有振動
数を設定することを特徴とする制振装置における制振体
の固有振動数設定方法。1. An elastic structure is attached between a damping body mounted on a structure so as to be repeatedly moved in the horizontal direction and the structure so that tension acts in the vertical direction, and the elastic structure is attached. A natural frequency setting method for a vibration damper in a vibration damping device, characterized in that the natural frequency of the vibration damper is set by adjusting the initial tension of the structure.
できる連結用ロッドとを有する弾性構造体とし、上記連
結用ロッドの長さを変えることにより初期張力を調整す
るようにする請求項１記載の制振装置における制振体の
固有振動数設定方法。2. The elastic structure is an elastic structure having a spring and a connecting rod whose length can be variably adjusted, and the initial tension is adjusted by changing the length of the connecting rod. Item 2. A method for setting a natural frequency of a vibration damper in the vibration damping device according to Item 1.
有する弾性構造体として、連結用ロッドの反ばね側の端
部に取り付けた支持プレートを制振体又は構造物に固定
したブラケットに重ね合わせて回動自在に連結し、支持
プレートとブラケットとの連結位置を変えることにより
初期張力を調整するようにする請求項１記載の制振装置
における制振体の固有振動数設定方法。3. A bracket in which a supporting plate attached to an end of the connecting rod on the side opposite to the spring is fixed to the vibration damper or the structure, wherein the elastic structure is an elastic structure having a spring and a connecting rod. 2. The method for setting the natural frequency of a vibration suppressor in a vibration damping device according to claim 1, wherein the initial tension is adjusted by overlapping and rotatably coupling and changing the coupling position between the support plate and the bracket.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002147966A JP4771642B2 (en) | 2002-05-22 | 2002-05-22 | Method and apparatus for setting natural frequency of damping body in damping device |
| US10/498,007 US7707787B2 (en) | 2002-02-27 | 2003-02-26 | Damping device and method for setting natural frequency of damping body in the damping device |
| KR10-2004-7011220A KR20040085157A (en) | 2002-02-27 | 2003-02-26 | Damping device and method for setting natural frequency of damping body in the damping device |
| CNB038045257A CN100414137C (en) | 2002-02-27 | 2003-02-26 | Damping device and method for setting natural frequency of damping body in the damping device |
| CA002469009A CA2469009A1 (en) | 2002-02-27 | 2003-02-26 | Damping device and method for setting characteristic frequency of damping body in said damping device |
| PCT/JP2003/002121 WO2003072977A1 (en) | 2002-02-27 | 2003-02-26 | Damping device and method for setting natural frequency of damping body in the damping device |
| EP03707089A EP1479938A4 (en) | 2002-02-27 | 2003-02-26 | Damping device and method for setting natural frequency of damping body in the damping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002147966A JP4771642B2 (en) | 2002-05-22 | 2002-05-22 | Method and apparatus for setting natural frequency of damping body in damping device |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2009022900A Division JP2009168248A (en) | 2009-02-03 | 2009-02-03 | Method and device for setting character frequency of vibration damping body in vibration damping device |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2003336683A true JP2003336683A (en) | 2003-11-28 |
| JP2003336683A6 JP2003336683A6 (en) | 2004-09-09 |
| JP4771642B2 JP4771642B2 (en) | 2011-09-14 |
Family
ID=29706175
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002147966A Expired - Lifetime JP4771642B2 (en) | 2002-02-27 | 2002-05-22 | Method and apparatus for setting natural frequency of damping body in damping device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4771642B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010106617A (en) * | 2008-10-31 | 2010-05-13 | Ihi Corp | Vibration control method and vibration control device for tower-like structure equipped with lifting moving object |
| JP2010281407A (en) * | 2009-06-05 | 2010-12-16 | Shimizu Corp | Damping mechanism and installation method therefor |
| JP2011153707A (en) * | 2009-12-28 | 2011-08-11 | Shimizu Corp | Seismic isolation mechanism for vertical movement |
| JP6026037B1 (en) * | 2016-04-19 | 2016-11-16 | 新日鉄住金エンジニアリング株式会社 | Seismic isolation structure |
| JP2018529900A (en) * | 2015-08-14 | 2018-10-11 | フラウンホファー ゲセルシャフト ツール フェールデルンク ダー アンゲヴァンテン フォルシュンク エー．ファオ． | Apparatus and method for mechanical coupling of at least one vibrationally mounted object and its use as a tunable damping element |
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2002
- 2002-05-22 JP JP2002147966A patent/JP4771642B2/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010106617A (en) * | 2008-10-31 | 2010-05-13 | Ihi Corp | Vibration control method and vibration control device for tower-like structure equipped with lifting moving object |
| JP2010281407A (en) * | 2009-06-05 | 2010-12-16 | Shimizu Corp | Damping mechanism and installation method therefor |
| JP2011153707A (en) * | 2009-12-28 | 2011-08-11 | Shimizu Corp | Seismic isolation mechanism for vertical movement |
| JP2018529900A (en) * | 2015-08-14 | 2018-10-11 | フラウンホファー ゲセルシャフト ツール フェールデルンク ダー アンゲヴァンテン フォルシュンク エー．ファオ． | Apparatus and method for mechanical coupling of at least one vibrationally mounted object and its use as a tunable damping element |
| JP7011576B2 (en) | 2015-08-14 | 2022-01-26 | フラウンホファー ゲセルシャフト ツール フェールデルンク ダー アンゲヴァンテン フォルシュンク エー．ファオ． | Devices and methods for mechanical coupling of at least one oscillatingly mounted object, and its use as a variable adjustable damping element. |
| JP6026037B1 (en) * | 2016-04-19 | 2016-11-16 | 新日鉄住金エンジニアリング株式会社 | Seismic isolation structure |
| JP7075802B2 (en) | 2017-04-28 | 2022-05-26 | ヴィンタートゥール ガス アンド ディーゼル リミテッド | Adjustable mass dampers and mounting components |
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|---|---|
| JP4771642B2 (en) | 2011-09-14 |
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