JP2003194142A - Vibration control structure using curved surface type particle damper - Google Patents
Vibration control structure using curved surface type particle damperInfo
- Publication number
- JP2003194142A JP2003194142A JP2001393689A JP2001393689A JP2003194142A JP 2003194142 A JP2003194142 A JP 2003194142A JP 2001393689 A JP2001393689 A JP 2001393689A JP 2001393689 A JP2001393689 A JP 2001393689A JP 2003194142 A JP2003194142 A JP 2003194142A
- Authority
- JP
- Japan
- Prior art keywords
- vibration
- cylindrical container
- vibration control
- movable
- granular material
- 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.)
- Pending
Links
Landscapes
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Vibration Prevention Devices (AREA)
Abstract
Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は、水平面内における任意
の方向から加えられる振動エネルギーを吸収する曲面型
粒子ダンパを用いた制振構造に関する。
【０００２】
【従来の技術】地震を始めとする各種振動から建築物，
構造物，機械設備等を保護するためオイルダンパ等の制
振装置が使用されているが、制振方向が一方向に限られ
ることが欠点である。多方向の制振が可能な制振装置と
して防振ゴム等を用いたダンパも知られているが、この
場合には高温，低温等の環境変化に応じて制振性能が大
きく劣化することが問題である。他方、単一粒子に代え
て粒状体を可動物体に使用した粒状体衝撃ダンパは、環
境の変化に拘らず振動エネルギーを粒状体の運動エネル
ギーとして吸収し、衝突時の騒音や衝突壁の損傷を防止
する。従来の粒状体衝撃ダンパでは、衝突面が振動方向
に垂直となるように設計された直方体や円筒体形状の容
器に粒状体を入れている。
【０００３】
【発明が解決しようとする課題】衝撃ダンパの性能は衝
突を含む可動物体の運動に大きく影響され、容器の衝突
面が振動方向に対して直角でない場合、衝撃ダンパの制
振性能が減少することが考えられる。円筒容器を使用し
た従来の衝撃ダンパにあっても、円筒容器の頂面又は底
面を衝突面にしているため、振動方向に対して直角でな
い事態が生じる。他方、衝突面の設置の仕方によって
は、常に主振動体の振動方向に沿って可動物体を運動さ
せることも可能である。そこで、水平振動系において円
筒面が衝突壁となるように円筒容器を衝撃ダンパに設置
することにより、十分な制振効果が得られるのであれ
ば、水平面内において何れの方向から加えられる振動エ
ネルギーに対しても制振可能なダンパが期待できる。
【０００４】
【課題を解決するための手段】本発明は、このような前
提に立って完成されたものであり、円筒容器の円筒面を
衝突壁に使用することにより、加振方向に拘らず振動エ
ネルギーを効率よく吸収し、建築物，構造物，機械設備
等を各種振動から保護することを目的とする。本発明の
制振構造は、その目的を達成するため、基礎部から立ち
上がった弾性支柱で主振動体を支持し、加振方向に対し
て衝突面が直交するように、可動粒状体を収容した円筒
容器を鉛直方向に軸を維持した曲面型粒子ダンパを主振
動体に配置していることを特徴とする。
【０００５】
【実施の形態】本発明に従った制振構造は、基礎部１か
ら立設した弾性支柱２で主振動体３を支持し、可動粒状
体４を収容した円筒容器５を主振動体３に設置している
（図１ａ）。ｘ−ｙ平面を地面と水平に維持して曲面型
粒子ダンパを配置すると、ｘ−ｙ平面内の何れの方向に
対しても円筒容器５の円筒面が直交する。
【０００６】この状態で基礎部１が加振されると、円筒
容器５内にある可動粒状体４が円筒壁６と衝突を繰り返
し（図１ｂ）、主振動体３の振動を低減する。ｘ−ｙ平
面における何れの加振方向ｖ−ｖに対しても円筒壁６が
直交するため、運動方向ｍ−ｍに沿った可動粒状体４の
動きは円筒容器５内で最大の軌跡をとる。その結果、加
振方向ｖ−ｖの変化に拘らず、常に同じ制振性能が得ら
れる。
【０００７】加振方向ｖ−ｖに衝突面を直交させる手段
として、鉛直方向に軸を維持した円筒容器５の外に球状
容器を使用することもできる。球状容器に可動粒状体４
を収容した場合にも、同様な最大軌跡で可動粒状体４が
球状容器内を流動して球状壁との衝突を繰り返し、振動
エネルギーを吸収する。
【０００８】これに対し、直方体容器７に可動粒状体４
（図２ａ）や軸を水平にして配置した円筒容器８（図２
ｂ）に可動粒状体４を収容した衝撃ダンパでは、直方体
容器７の長手方向又は円筒容器８の軸方向を加振方向ｖ
−ｖとする振動エネルギーに対しては直方体容器７，円
筒容器８内で可動粒状体４が最大の運動軌跡をとるが、
加振方向ｖ−ｖが変化すると可動粒状体４の運動方向ｍ
−ｍが種々変化する（図２ｃ）。運動方向ｍ−ｍの変化
に応じ吸収される振動エネルギーが変わるため、加振方
向ｖ−ｖによっては十分な制振性能を示さないことがあ
る。
【０００９】この対比から明らかなように、鉛直方向に
軸を維持した円筒容器５を主振動体３に設置することに
より、水平面（ｘ−ｙ平面）内における何れの加振方向
ｖ−ｖに対しても円筒容器５の円筒壁６が直交する。そ
して、振動エネルギーが加えられた場合、加振方向ｖ−
ｖに拘らず円筒容器５内で可動粒状体４が最大の運動軌
跡をとり、可動粒状体４の運動エネルギーや可動粒状体
４／円筒壁６の摩擦仕事として振動エネルギーを吸収す
る。したがって、優れた制振性能が常に発現し、建築
物，構造物，機械設備等を各種振動から保護する。
【００１０】
【発明の効果】以上に説明したように、本発明の制振構
造は、円筒面を衝突壁にした容器に可動粒状体４を収容
した曲面型粒子ダンパを使用しているので、水平面内の
何れの方向から加えられる振動エネルギーに対しても優
れた制振性能を呈する。そのため、各種機械設備，建築
物，構造物，アンテナ，照明灯等、広範な分野における
制振に使用できる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration damping structure using a curved particle damper for absorbing vibration energy applied from an arbitrary direction in a horizontal plane. 2. Description of the Related Art Buildings,
Although a vibration damping device such as an oil damper is used to protect structures, machinery and the like, there is a drawback that the vibration damping direction is limited to one direction. A damper using a vibration-proof rubber or the like is also known as a vibration damping device capable of multi-directional vibration damping, but in this case, the vibration damping performance may be significantly deteriorated in accordance with environmental changes such as high temperature and low temperature. It is a problem. On the other hand, a granular impact damper using a granular material as a movable object instead of a single particle absorbs vibration energy as kinetic energy of the granular material regardless of environmental changes, and reduces noise and damage to the collision wall at the time of collision. To prevent. In the conventional granular material impact damper, the granular material is put in a rectangular parallelepiped or cylindrical container designed so that the collision surface is perpendicular to the vibration direction. [0003] The performance of an impact damper is greatly affected by the motion of a movable object including a collision, and when the collision surface of the container is not perpendicular to the vibration direction, the vibration damping performance of the impact damper is reduced. It is thought that it will decrease. Even in a conventional impact damper using a cylindrical container, the top surface or the bottom surface of the cylindrical container is used as a collision surface. On the other hand, the movable object can always be moved along the vibration direction of the main vibrator depending on how the collision surface is set. Therefore, if a sufficient vibration damping effect can be obtained by installing the cylindrical container on the impact damper so that the cylindrical surface becomes the collision wall in the horizontal vibration system, the vibration energy applied from any direction in the horizontal plane can be reduced. A damper that can be damped can be expected. SUMMARY OF THE INVENTION The present invention has been completed based on such a premise, and uses a cylindrical surface of a cylindrical container as a collision wall so that the cylindrical container can be used regardless of the vibration direction. The purpose is to efficiently absorb vibration energy and protect buildings, structures, machinery and equipment from various vibrations. In order to achieve the object, the vibration damping structure of the present invention supports the main vibrating body with the elastic struts rising from the base portion, and accommodates the movable granular body so that the collision surface is orthogonal to the vibration direction. A curved particle damper in which the axis of the cylindrical container is maintained in the vertical direction is disposed on the main vibrator. [0005] In the vibration damping structure according to the present invention, a main vibrator 3 is supported by an elastic column 2 erected from a base 1, and a cylindrical container 5 containing a movable granular material 4 is vibrated. It is placed on body 3 (FIG. 1a). When the curved particle damper is arranged while keeping the xy plane horizontal to the ground, the cylindrical surface of the cylindrical container 5 is orthogonal to any direction in the xy plane. When the foundation 1 is vibrated in this state, the movable granular material 4 in the cylindrical container 5 repeatedly collides with the cylindrical wall 6 (FIG. 1b), and the vibration of the main vibrating body 3 is reduced. Since the cylindrical wall 6 is orthogonal to any of the vibration directions v-v on the xy plane, the movement of the movable granular material 4 along the movement direction mm takes the maximum trajectory in the cylindrical container 5. . As a result, the same vibration suppression performance is always obtained regardless of the change in the vibration direction v-v. As means for making the collision surface orthogonal to the vibration direction vv, a spherical container may be used in addition to the cylindrical container 5 whose axis is maintained in the vertical direction. Movable granular material 4 in spherical container
Also, the movable granular material 4 flows in the spherical container with the same maximum trajectory and repeatedly collides with the spherical wall to absorb vibration energy. On the other hand, the movable granular material 4 is
(FIG. 2a) and a cylindrical container 8 (FIG.
In the impact damper accommodating the movable granular material 4 in b), the longitudinal direction of the rectangular parallelepiped container 7 or the axial direction of the cylindrical container 8 is set in the vibration direction v.
For the vibration energy −v, the movable granular material 4 takes the maximum motion trajectory in the rectangular parallelepiped container 7 and the cylindrical container 8.
When the vibration direction v-v changes, the movement direction m of the movable granular material 4
−m varies (FIG. 2c). Since the absorbed vibration energy changes according to the change in the movement direction mm, sufficient vibration suppression performance may not be exhibited depending on the vibration direction vv. As is apparent from this comparison, by installing the cylindrical container 5 whose axis is maintained in the vertical direction on the main vibrating body 3, any of the vibrating directions vv in the horizontal plane (xy plane) can be obtained. On the other hand, the cylindrical wall 6 of the cylindrical container 5 is orthogonal. When vibration energy is applied, the vibration direction v-
Regardless of v, the movable granular material 4 takes the maximum motion trajectory in the cylindrical container 5 and absorbs vibration energy as kinetic energy of the movable granular material 4 and frictional work between the movable granular material 4 and the cylindrical wall 6. Therefore, excellent vibration damping performance is always exhibited, and the building, structure, mechanical equipment, etc. are protected from various vibrations. As described above, the vibration damping structure of the present invention uses a curved particle damper in which the movable granular material 4 is accommodated in a container having a cylindrical surface as a collision wall. It exhibits excellent vibration damping performance against vibration energy applied from any direction in the horizontal plane. Therefore, it can be used for vibration suppression in a wide range of fields such as various types of mechanical equipment, buildings, structures, antennas, and lightings.
【図面の簡単な説明】
【図１】 本発明に従った制振構造のモデル図（ａ）及
び振動エネルギーが加えられた場合の可動粒状体の運動
を説明する図（ｂ）
【図２】 従来の直方体容器（ａ）又は軸を水平にした
円筒容器（ｂ）に可動粒状体を収容した衝撃ダンパ及び
振動エネルギーが加えられた場合の可動粒状体の運動を
説明する図（ｃ）
【符号の説明】
１：基礎部 ２：弾性支柱 ３：主振動体 ４：
可動粒状体 ５：円筒容器 ６：円筒壁 ７：直
方体容器 ８：軸を水平にした円筒容器
ｖ−ｖ：加振方向 ｍ−ｍ：可動粒状体の運動方向BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 (a) is a model diagram of a vibration damping structure according to the present invention, and FIG. 1 (b) is a diagram illustrating movement of a movable granular material when vibration energy is applied. Diagram (c) for explaining a conventional rectangular parallelepiped container (a) or a cylindrical container (b) having a horizontal axis and an impact damper accommodating the movable granules and the motion of the movable granules when vibration energy is applied. Explanation: 1: Basic part 2: Elastic strut 3: Main vibrator 4:
Movable granular material 5: Cylindrical container 6: Cylindrical wall 7: Rectangular container 8: Cylindrical container v-v: Vibration direction mm: Motion direction of movable granular material
Claims (1)
動体を支持し、加振方向に対して衝突面が直交するよう
に、可動粒状体を収容した円筒容器を鉛直方向に軸を維
持して主振動体に配置していることを特徴とする曲面型
粒子ダンパを用いた制振構造。Claims: 1. A cylindrical container accommodating a movable granular material, wherein a main vibrator is supported by an elastic support standing upright from a base portion, and a movable surface of the cylindrical container is perpendicular to a vibration direction. A vibration damping structure using a curved particle damper characterized by being arranged on a main vibrator while maintaining an axis in a direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001393689A JP2003194142A (en) | 2001-12-26 | 2001-12-26 | Vibration control structure using curved surface type particle damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001393689A JP2003194142A (en) | 2001-12-26 | 2001-12-26 | Vibration control structure using curved surface type particle damper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003194142A true JP2003194142A (en) | 2003-07-09 |
Family
ID=27600617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001393689A Pending JP2003194142A (en) | 2001-12-26 | 2001-12-26 | Vibration control structure using curved surface type particle damper |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003194142A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009030653A (en) * | 2007-07-24 | 2009-02-12 | Kochi Univ Of Technology | Dynamic vibration damper using locking |
| CN105863097A (en) * | 2016-05-11 | 2016-08-17 | 同济大学 | Nonlinear rail type collaborative tuning damper |
| US9521753B1 (en) | 2014-03-04 | 2016-12-13 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Vibration damping circuit card assembly |
| US10021779B1 (en) | 2017-11-28 | 2018-07-10 | TopLine Coporation | Quick response particle damper for printed circuit boards and planar surfaces |
| US10041558B1 (en) | 2017-10-06 | 2018-08-07 | Topline Corporation | Tunable apparatus for adjusting effective performance of particle impact damper |
| CN109826330A (en) * | 2019-01-30 | 2019-05-31 | 北京工业大学 | The adjustable more bending chamber composite particles of the natural frequency of vibration tune vibration absorber |
| KR20190071422A (en) * | 2017-12-14 | 2019-06-24 | 삼성전자주식회사 | Vibration decreasing device |
| US10704639B2 (en) | 2018-08-14 | 2020-07-07 | Topline Corporation | Unidirectional particle damper for printed circuit boards and planar surfaces |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009030653A (en) * | 2007-07-24 | 2009-02-12 | Kochi Univ Of Technology | Dynamic vibration damper using locking |
| US9521753B1 (en) | 2014-03-04 | 2016-12-13 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Vibration damping circuit card assembly |
| CN105863097A (en) * | 2016-05-11 | 2016-08-17 | 同济大学 | Nonlinear rail type collaborative tuning damper |
| CN105863097B (en) * | 2016-05-11 | 2017-12-26 | 同济大学 | Non-liner track formula cooperates with tuned damper |
| US10041558B1 (en) | 2017-10-06 | 2018-08-07 | Topline Corporation | Tunable apparatus for adjusting effective performance of particle impact damper |
| US10021779B1 (en) | 2017-11-28 | 2018-07-10 | TopLine Coporation | Quick response particle damper for printed circuit boards and planar surfaces |
| KR20190071422A (en) * | 2017-12-14 | 2019-06-24 | 삼성전자주식회사 | Vibration decreasing device |
| KR102504575B1 (en) | 2017-12-14 | 2023-03-02 | 삼성전자주식회사 | Vibration decreasing device |
| US10704639B2 (en) | 2018-08-14 | 2020-07-07 | Topline Corporation | Unidirectional particle damper for printed circuit boards and planar surfaces |
| CN109826330A (en) * | 2019-01-30 | 2019-05-31 | 北京工业大学 | The adjustable more bending chamber composite particles of the natural frequency of vibration tune vibration absorber |
| CN109826330B (en) * | 2019-01-30 | 2020-06-19 | 北京工业大学 | Multi-bending-cavity composite particle tuning vibration reduction device with adjustable natural vibration frequency |
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