JP2009168248A - Method and device for setting character frequency of vibration damping body in vibration damping device - Google Patents

Method and device for setting character frequency of vibration damping body in vibration damping device Download PDF

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JP2009168248A
JP2009168248A JP2009022900A JP2009022900A JP2009168248A JP 2009168248 A JP2009168248 A JP 2009168248A JP 2009022900 A JP2009022900 A JP 2009022900A JP 2009022900 A JP2009022900 A JP 2009022900A JP 2009168248 A JP2009168248 A JP 2009168248A
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damping body
vibration damping
natural frequency
elastic structure
connecting rod
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Mutsuhiro Kazama
睦広 風間
Fumio Sato
文男 佐藤
Nauemon Uno
名右衛門 宇野
Katsuo Mutaguchi
勝生 牟田口
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IHI Corp
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IHI Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To facilitate setting and adjustment work to match a character frequency of a vibration damping body and a character frequency of structure. <P>SOLUTION: In a vibration damping device, the vibration damping body 3 is placed on structure 1 so that the vibration damping body 3 reciprocates and moves in a horizontal direction. Elastic structure 12 is vertically attached between a lower surface center part of the vibration damping body 3 at a neutral position of the vibration damping body 3 and the structure 1 positioned just under the vibration damping body 3. The elastic structure 12 has an extension coil spring 16 and a connecting rod 18. The connecting rod 18 is constituted of: a rod 18a having a screw part 21a at a lower end part thereof; a rod 18b having a screw part 21b reverse to the screw part 21a at an upper end part thereof; and a turn buckle 22 screwed with the screw parts 21a, 21b. Length of the connecting rod 18 is changed to adjust an initial tension by rotating the turn buckle 22, and the character frequency of the vibration damping body 3 is set. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

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及び装置に関するものである。   The present invention is installed on top of structures such as suspension bridge towers, high-rise buildings, towers, steel towers, etc., to suppress vibrations (oscillations) caused by wind loads and earthquakes of these structures in order to attenuate the vibrations at an early stage. The present invention relates to a method and an apparatus for setting a natural frequency of a damping body in a damping device to be used.

従来におけるこの種制振装置としては、図９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。   As this kind of conventional vibration damping device, a guide rail 2 is laid on the upper surface of the structure 1 in parallel with the direction in which the structure 1 sways, as schematically shown in FIG. A vibration damping body 3 as a weight is placed on the wheel 4 so as to be movable along the guide rail 2 in the horizontal direction, and a structure on one end side in the moving direction of the vibration damping body 3 The natural frequency of the damping body 3 and the damping body 3 for damping the kinetic energy of the damping body 3 is adjusted between the support frame 5 standing on the one end and the one end surface of the damping body 3. There is a structure in which a spring 7 is interposed, and when the structure 1 is shaken, the vibration energy is transmitted to the vibration damping body 3. The guide rail 2 can be repeatedly moved at a phase delayed by 90 degrees. When, as a result of the kinetic energy of the damping body 3 is attenuated by the attenuator 6, it is as shaking of the structure 1 can be suppressed.

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 give an optimum vibration damping effect to the structure 1, the mass, the moving stroke, etc. of the vibration damping body 3 are selected, and the natural frequency of the vibration damping body 3 is set to the structure. Although it is necessary to set according to the natural frequency of 1, there is a problem that the setting adjustment is very troublesome.

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ωｏは、ωｏ＝√（ｋ／ｍ）、減衰係数比μは、μ＝ｃ／２√（ｍｋ）となる。ここで、制振体３の固有振動数ωｏを変更する場合、ばね７のばね定数をｋからｋ１にすれば、ωｏ´＝√（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 damping body 3 is m, the spring constant of the spring 7 for adjusting the natural frequency is k, and the damping force (control force) of the damper 6 that attenuates the vibration of the damping body 3. Is c, the natural frequency ω o of the damping body 3 is ω o = √ (k / m), and the damping coefficient ratio μ is μ = c / 2√ (mk). Here, when the natural frequency ω o of the damping body 3 is changed, if the spring constant of the spring 7 is changed from k to k 1 , ω o ′ = √ (k 1 / m), which can be changed. However, since the natural frequency of the structure 1 is not always obtained as designed, a plurality of springs 7 having different spring constants are prepared to correspond to the actual natural frequency of the structure 1. When it is necessary to select the spring 7 from which the natural frequency can be obtained, and when it becomes necessary to adjust the natural frequency of the damping body 3 in accordance with the change in the natural frequency of the structure 1, There is a problem that the spring 7 must have a different spring constant.

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１０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 damping device that can set the natural frequency of the damping body regardless of the spring constant of the spring, as shown schematically in FIG. The vibration control body 8 is placed on two support rollers 9 spaced apart on the structure 1 through a liner plate 10 so as to be swingable, and the vibration control body 8 is equivalent to a vibration control device similar to a simple pendulum. In this case, in order to adjust the natural frequency of the damping body 8, it is necessary to replace the liner plate 10 with one having a different thickness. There is a problem that a large-scale apparatus and tools such as a hydraulic jack, a lever block, a chain block and the like are necessary on the site, which is very troublesome.

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及び装置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 body natural frequency that can easily adjust the natural frequency of the vibration damping body in a vibration damping device that repeatedly moves the vibration damping body in the horizontal direction. It is an object of the present invention to provide a setting method and apparatus.

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コイルばね又は皿ばねを備える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制振装置における制振体の固有振動数設定方法及び装置とする。   In order to solve the above problems, the present invention provides a coil in which a vertical tension is applied between a vibration damping body and a structure that are placed so as to repeatedly move in the horizontal direction on the structure. A method and an apparatus for setting a natural frequency of a damping body in a damping device for attaching an elastic structure including a spring or a disc spring and setting the natural frequency of the damping body by adjusting an initial tension of the elastic structure To do.

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 damping body can be easily set.

又、弾性構造体を、コイルばね又は皿ばねと、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、コイルばね又は皿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。   The elastic structure may be an elastic structure having a coil spring or a disc spring and a connecting rod whose length can be variably adjusted, and the initial tension may be adjusted by changing the length of the connecting rod. Alternatively, the elastic structure is an elastic structure having a coil spring or a disc spring and a connecting rod, and a bracket in which a support plate attached to the end of the connecting rod on the side opposite to the spring is fixed to the damping body or the structure. The natural frequency of the damping body is matched to the natural frequency of the structure by adjusting the initial tension by changing the connection position of the support plate and bracket. Can be set to the optimum value.

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及び装置によれば、以下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コイルばね又は皿ばねを備える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方法及び装置としてあるので、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、コイルばね又は皿ばねと、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、コイルばね又は皿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。 The method and apparatus for setting the natural frequency of the damping body in the damping device of the present invention exhibit the following excellent effects.
(1) An elastic structure provided with a coil spring or a disc spring so that a tension acts in the vertical direction between the vibration damping body placed so as to repeatedly move in the horizontal direction on the structure and the structure. And adjusting the initial tension of the elastic structure so as to set the natural frequency of the vibration damping body and thus the characteristic of the vibration damping body without preparing a plurality of springs as in the prior art. The frequency can be easily set and adjusted, and re-adjustment can be easily performed without any trouble.Therefore, the natural frequency can be easily set even at the site, shortening the construction period and reducing the cost of construction. Can be planned.
(2) The elastic structure is an elastic structure having a coil spring or a disc 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. Or, the elastic structure is an elastic structure having a coil spring or a disc spring and a connecting rod, and a support plate attached to the end of the connecting rod on the side opposite to the spring is fixed to the damping body or the structure. The natural frequency of the damping body is changed to the natural frequency of the structure by overlapping the bracket and pivotally connecting it, and adjusting the initial tension by changing the connection position between the support plate and the bracket. Together, it can be set to an optimum value.

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及び装置の実施の一形態を示す概要図である。It is a schematic diagram showing one embodiment of the natural frequency setting method and device of the damping body in the damping device of the present invention. 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。It is the schematic which shows an example of the elastic structure used for implementation of this invention. 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。It is an example figure which shows the relationship between the tension | pulling coil spring of the elastic structure attached to the up-down direction, and the restoring force which acts on a damping body. 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。It is an example figure which shows the relationship between the deflection amount of the tension coil spring of the elastic structure attached to the up-down direction, and the natural frequency of a damping body. 弾性構造体の他の例を示す概略図である。It is the schematic which shows the other example of an elastic structure. 弾性構造体の更に他の例を示す概略図である。It is the schematic which shows the further another example of an elastic structure. 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。It is the schematic which shows the other example of the initial tension adjustment part of an elastic structure. 本発明の変形例を示す概要図である。It is a schematic diagram which shows the modification of this invention. 従来の制振装置の一例を示す概略図である。It is the schematic which shows an example of the conventional damping device. 従来の制振装置の他の例を示す概略図である。It is the schematic which shows the other example of the conventional damping device.

以下、本発明を実施するための形態を図面を参照して説明する。   Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

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 base frame 11 having a rectangular frame shape is installed on the upper surface of a structure 1, and the shaking direction of the structure 1 is positioned at both front and rear positions on the base frame 11. The guide rails 2 are laid in parallel along the left and right directions (arrow X direction), and a vibration damping body 3 as a weight can be moved in the left and right directions via the wheels 4 on the both guide rails 2. In the vibration damping device that is placed and the damping device 6 is interposed between the support frame 5 and the one end surface of the vibration damping body 3 that are erected at the center in the front-rear direction of one end of the base frame 11 in the left-right direction. The natural frequency adjustment is performed between, for example, the central portion of the lower surface of the vibration damping body 3 at the neutral position of the vibration damping body 3 which is the intermediate position in the longitudinal direction of the guide rail 2 and the structure 1 located immediately below the vibration damping body 3. The elastic structure 12 for use in such a manner that tension acts in the vertical direction and Over scan gantry 11, attached to vertically so as not to interfere with the guide rail 2, so as to set the natural frequency of the damping body 3 by adjusting the initial tension F of the elastic structure 12.

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２１ａ，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 FIG. 2 in an enlarged manner, the elastic structure 12 has a lower end portion of a link member 14 attached to a bracket 13 fixed on the structure 1 by a pin 15 so as to be rotatable in the left-right direction. 14 with a turnbuckle that connects the upper end portion of the tension coil spring 16 to the upper end portion 14 and the bracket 19 fixed to the lower surface of the damping body 3. The connecting rod 18 with a turnbuckle comprises a rod 18a having an eye plate 17a at the upper end and a threaded portion 21a at the lower end, and an eye plate 17b at the lower end and an upper end. The turnbuckle 22 is screwed into the screw portions 21a and 21b of the rod 18b having a screw portion 21b opposite to the screw portion 21a, and the lower end of the rod 18b. The upper end of the tension coil spring 16 is locked to the eye plate 17b, 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 damping body 3 so as to be rotatable in the left-right direction by the pins 20. The bending amount as the tensile reaction force of the tension coil spring 16 can be changed by changing the length of the connecting rod 18 by rotating the turnbuckle 22.

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 damping body 3 so as to match the natural frequency of the structure 1, the turnbuckle 22 provided on the connecting rod 18 in the elastic structure 12 is rotated and connected. The length of the rod 18 is changed, whereby the initial tension F of the entire elastic structure 12 based on the amount of bending of the tension coil spring 16 is adjusted, and the natural frequency of the damping body 3 is set.

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１５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９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 is shaken by aerodynamic force or the like, the vibration energy is transmitted to the vibration damping body 3, so that the vibration damping body 3 is converted into kinetic energy that moves in the horizontal direction. By the indirect energy consumption form that is consumed by the attenuator 6, the shaking of the structure 1 can be quickly suppressed. At this time, the damping force to the structure 1 is optimally obtained by selecting the mass of the damping body 3, the moving stroke, and the natural frequency, but the elastic structure 12 for adjusting the natural frequency is used for damping. When the vibration control body 3 is attached in the vertical direction between the body 3 and the structure 1 and the damping body 3 moves in the left-right direction, the elastic structure 12 is stretched obliquely in the left-right direction using the pin 15 at the lower end as a fulcrum. The horizontal component force at the time of restoration is applied to the damping body 3. For this reason, the amount of bending (elongation) of the tension coil spring 16 is small compared to the case of expanding and contracting in the horizontal direction as in the spring 7 shown in FIG. Since the initial tension F of the elastic structure 12 in the vertical direction can be arbitrarily adjusted, the natural frequency of the damping body 3 can be easily matched with the natural frequency of the structure 1. Since the tension coil spring 16 does not change the tension even when it is stretched obliquely from the vertical state, it is sufficient to use a spring having a length that can allow the length variation.

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３０００ｋｇ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, a spring constant of 755 N / mm, and a damping body. When the mass of 3 is 3000 kg, an example is shown in FIG. Further, 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 a range of 30 to 70 mm from FIG. 4. Thus, it can be seen that the natural frequency of the damping body 3 can be adjusted steplessly in a range of approximately 0.7 to 0.9 Hz. Accordingly, the natural frequency of the damping body 3 can be set to an optimum value in accordance with the natural frequency of the structure 1, and the natural vibration of the damping body 3 can be set according to the change of the natural frequency of the structure 1. Even if the number needs to be readjusted, it is not necessary to replace the spring with a different spring constant each time as in the prior art.

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１８ｂと引張コイルばね１６に代えて、ピストンロッド２４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２４ａ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２１ａ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 in the implementation of the present invention. Instead of the rod 18b and the tension coil spring 16 shown in FIG. 2, a piston rod 24 and a compression coil spring 23 are provided. It is what was used. That is, the compression rod spring 23 is disposed between the one end wall in the cylinder body 25 and the piston 24a so that the piston rod 24 can be moved in and out from one end wall in the longitudinal direction of the cylinder body 25 in which the piston 24a is accommodated. In addition, a screw portion 21b is provided at the upper end portion of the piston rod 24 projecting from the cylinder body 25, and the turnbuckle 22 is provided between the screw portion 21a at the lower end portion of the rod 18a as shown in FIG. 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 a 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 denoted by the same reference numerals.

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 when the elastic structure 12 shown in FIG. 5 is used, the natural frequency of the damping body 3 can be easily set by adjusting the initial tension based on the compression reaction force of the compression coil spring 23 by rotating the turnbuckle 22. Can be adjusted.

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, and 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. 5, and the same components are denoted by the same reference numerals.

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 when the elastic structure 12 shown in FIG. 6 is used, the natural frequency of the damping body 3 can be easily set and adjusted by adjusting the initial tension based on the compression reaction force of the disc spring 27 by rotating the turnbuckle 22. can do.

更に、図７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３１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７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。   Further, FIG. 7 shows another example of the initial tension adjusting portion by the elastic structure 12. The connecting rod 18 shown in FIG. 2 has a single structure in which the turnbuckle 22 is eliminated, and the connecting rod. In place of providing an eye plate 17a at the upper end of 18, a support plate 17c having a plurality of holes 31 in the vertical direction is attached, and any one of the above holes 31 of the support plate 17c and the hole 19a of the bracket 19 are bolted. 32 and a nut, and the initial tension can be adjusted by changing the connecting position. The configuration shown in FIG. 7 can be employed at the upper end of the piston rod 24 in place of the rod 18a and the turnbuckle 22 in the configurations shown in FIGS. In place of the plurality of holes 31, a long hole may be used.

図７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 adjustment portion as shown in FIG. 7, the natural frequency of the damping body 3 can be set and adjusted.

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８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 embodiments may be arranged upside down. Also, as shown in FIG. 8, the center of the lower surface of the damping body 3 shown in FIG. Instead of attaching the elastic structure 12 to the upper part, a support frame 33 as a fixing member is installed at a position surrounding the base frame 11 and the vibration damping body 3 so that the vibration damping body 3 is suspended from above. In addition, the elastic structure 12 may be vertically attached between the damping body 3 and the upper beam body 33a of the support frame 33, for example, and the scale of the structure 1 Depending on 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 vibration damping apparatus has been described. The same applies to And various modifications may be made without departing from the scope and spirit of the invention.

１ 構造物
３ 制振体
１２ 弾性構造体
１６ 引張コイルばね（コイルばね）
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（コイルばね）
２７ 皿ばね DESCRIPTION OF SYMBOLS 1 Structure 3 Damping body 12 Elastic structure 16 Tension coil spring (coil spring)
17c Support plate 18 Connecting rod 19 Bracket 23 Compression coil spring (coil spring)
27 Disc spring

Claims (4)

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コイルばね又は皿ばねを備える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。   An elastic structure provided with a coil spring or a disc spring is attached between the vibration damping body and the structure that are placed so as to repeatedly move in the horizontal direction on the structure so that tension is applied in the vertical direction, A natural frequency setting method for a damping body in a damping device, wherein the natural frequency of the damping body is set by adjusting an initial tension of the elastic structure. 構造物上に制振体を水平方向へ反復移動できるように載置し、該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コイルばね又は皿ばねを備え且つばねの初期張力を調整できるようにした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した構成を有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装置。   A damping body is placed on the structure so that it can be repeatedly moved in the horizontal direction, and a coil spring or a disc spring is provided between the damping body and the structure so that a tension acts in the vertical direction. The vibration damping device has a configuration in which an elastic structure that can adjust the initial tension is attached and the natural frequency of the damping body is set by adjusting the initial tension of the elastic structure. The natural frequency setting device of the damping body in the device. 弾性構造体を、コイルばね又は皿ばねと、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。   The elastic structure is an elastic structure having a coil spring or a disc 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 natural frequency setting method of the damping body in the damping device according to 1. 弾性構造体を、コイルばね又は皿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。   The elastic structure is formed as an elastic structure having a coil spring or a disc spring and a connecting rod, and a support plate attached to the end of the connecting rod on the side opposite to the spring is superposed on a bracket fixed to the damping body or the structure. The method for setting the natural frequency of the damping body in the damping device according to claim 1, wherein the initial tension is adjusted by changing the connecting position between the support plate and the bracket.
JP2009022900A 2009-02-03 2009-02-03 Method and device for setting character frequency of vibration damping body in vibration damping device Pending JP2009168248A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180121343A (en) * 2017-04-28 2018-11-07 빈터투르 가스 앤 디젤 아게 Tunable mass damper and mounting component
JP2019044532A (en) * 2017-09-06 2019-03-22 ヤクモ株式会社 Vibration control device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180121343A (en) * 2017-04-28 2018-11-07 빈터투르 가스 앤 디젤 아게 Tunable mass damper and mounting component
JP2018189232A (en) * 2017-04-28 2018-11-29 ヴィンタートゥール ガス アンド ディーゼル リミテッド Tunable mass damper and mounted component
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
KR102493939B1 (en) * 2017-04-28 2023-01-30 빈터투르 가스 앤 디젤 아게 Tunable mass damper and mounting component
JP2019044532A (en) * 2017-09-06 2019-03-22 ヤクモ株式会社 Vibration control device

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