JPH05149026A - Oscillation suppressing equipment for structure - Google Patents

Oscillation suppressing equipment for structure

Info

Publication number
JPH05149026A
JPH05149026A JP3315033A JP31503391A JPH05149026A JP H05149026 A JPH05149026 A JP H05149026A JP 3315033 A JP3315033 A JP 3315033A JP 31503391 A JP31503391 A JP 31503391A JP H05149026 A JPH05149026 A JP H05149026A
Authority
JP
Japan
Prior art keywords
vibration
storage tanks
liquid
oscillation frequency
frequency
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
JP3315033A
Other languages
Japanese (ja)
Other versions
JP3116142B2 (en
Inventor
Toshihiro Wakahara
敏裕 若原
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.)
Shimizu Construction Co Ltd
Shimizu Corp
Original Assignee
Shimizu Construction Co Ltd
Shimizu 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 Shimizu Construction Co Ltd, Shimizu Corp filed Critical Shimizu Construction Co Ltd
Priority to JP03315033A priority Critical patent/JP3116142B2/en
Publication of JPH05149026A publication Critical patent/JPH05149026A/en
Application granted granted Critical
Publication of JP3116142B2 publication Critical patent/JP3116142B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30Hydrogen technology
    • Y02E60/50Fuel cells

Landscapes

  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

PURPOSE:To improve oscillation controlling effect by oscillating partial oscillation devices among a plurality of oscillation devices, with the same oscillation frequency as the inherent oscillation frequency of a structure, and a plurality of other oscillation devices, respectively with oscillation frequency different little by little from the inherent oscillation frequency of the structure. CONSTITUTION:An oscillation suppressing equipment 1 is roughly composed of a plurality of storage tanks 2... laminated in the vertical direction, four supports 3... for supporting the storage tanks 2 in a laminated state, a bearing plate 4 for supporting the supports 3..., and liquid L stored in the storage tanks 2. After that, the storage tanks 2 are composed of the tank main-body 4, and cover bodies 5 for closing the opening sections of the tank main-body 4. Then, in the central storage tank 2 among the storage tanks 2..., the liquid L is stored to be oscillated with the same oscillation frequency as the inherent oscillation frequency of a structure, by determining the depth of the liquid L. Besides, in the other storage tanks 2..., the liquid L is stored to be oscillated with oscillation frequency different little by little from the inherent oscillation frequency of the structure, by changing the depth of the liquid L little by little.

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、地震や風等によって
建築・土木構造物に励起される振動を抑制するために、
これら構造物に設置される構造物の振動抑制装置に関す
るものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is intended to suppress vibrations that are excited in a building or civil engineering structure due to an earthquake or wind.
The present invention relates to a vibration suppression device for structures installed in these structures.

【0002】[0002]

【従来の技術】近年の建築・土木構造物は、高強度材料
の開発、工作技術の進歩、並びに電算機による構造解析
技術の発展等の要因により、大型化、形式の多様化、軽
量化がなされるとともに、外力に対してフレキシビリテ
ィに富んだ構造となっている。そして、このように軽量
で柔軟な構造物においては、その固有振動数が低く、内
部の振動減衰も小さくなる傾向があるため、地震や風等
の外力の影響により予期し得ない種々の振動が発生する
可能性がある。
2. Description of the Related Art Due to factors such as the development of high-strength materials, the progress of machining technology, and the development of structural analysis technology using computers, the construction and civil engineering structures of recent years are becoming larger, diversified in form and lighter in weight. In addition to being made, it has a structure that is highly flexible against external forces. In such a lightweight and flexible structure, its natural frequency is low and its internal vibration damping tends to be small. Therefore, various unexpected vibrations may occur due to the influence of external forces such as earthquakes and winds. Can occur.

【0003】特に、前述の如く、構造物の大型化に伴っ
て、外力によって励起される振動の振幅も大きくなるた
め、この振動が構造物内部に居住する人間に不必要な不
安感を与えるとともに、構造物の躯体に許容範囲以上の
応力を付与する恐れさえあった。そこで、上述のような
問題を解消するため、従来よりダイナミックダンパーと
称される質量効果利用方式の振動抑制装置が提供されて
いる。この方式の振動抑制装置として、例えば、構造物
に振り子を取り付けたもの、細管中を移動する液体の質
量効果を利用したもの、構造物の動きに合わせて質量を
油圧制御するもの、構造物の固有の振動周期と同一の周
期で振動する液体を貯留したタンク等が知られている。
上記のような質量効果利用方式の振動抑制装置の振動抑
制の機構の原理は、構造物に、該構造物の固有の振動数
と同一の振動数で振動する振動系を設け、構造物の応答
に共振させることによって構造物の振動エネルギーを吸
収し、建物の応答を抑制するものである。
In particular, as described above, as the size of the structure increases, the amplitude of the vibration excited by the external force also increases, and this vibration gives an uncomfortable feeling to the person living inside the structure. However, there is a possibility that stress beyond the allowable range may be applied to the frame of the structure. Therefore, in order to solve the above-mentioned problems, conventionally, a vibration suppression device of a mass effect utilizing type called a dynamic damper has been provided. Examples of this type of vibration suppression device include a structure having a pendulum attached, a device utilizing the mass effect of a liquid moving in a thin tube, a device for hydraulically controlling the mass according to the movement of the structure, and a structure. There is known a tank or the like that stores a liquid that vibrates in the same cycle as a unique vibration cycle.
The principle of the vibration suppression mechanism of the above-described mass effect type vibration suppression device is that a structure is provided with a vibration system that vibrates at the same frequency as the unique frequency of the structure. It resonates to absorb the vibration energy of the structure and suppress the response of the building.

【0004】そして、本出願人等は、質量効果利用方式
の振動抑制装置の一つとして、特願昭60ー24104
5号明細書において、構造物の所定位置に、この構造物
の固有の振動周期と同一の周期で、しかも所要の位相差
を伴って振動する液体を貯留する貯留タンクを設け、こ
の液体の振動によって前記構造物の振動を抑制すること
のできる振動抑制装置(スロッシングダンパー)を提案
した。
[0004] The applicant of the present invention has proposed that the Japanese Patent Application No. 60-24104 is one of the vibration suppression devices utilizing the mass effect.
In the specification of No. 5, a storage tank for storing a liquid vibrating at a predetermined position of the structure at the same cycle as the unique vibration cycle of the structure and with a required phase difference is provided. Therefore, a vibration suppressing device (sloshing damper) capable of suppressing the vibration of the structure has been proposed.

【0005】[0005]

【発明が解決しようとする課題】ところで、上記特願昭
60ー241045号明細書中の振動抑制装置では、貯
留タンク内の液体の振動周期と建物の固有周期とを一致
させるため、同形・同大の複数の貯留タンクを使用する
場合(第2および第3実施例の場合)、複数の貯留タン
ク内の水深を全て同じに設定していたが、この場合、次
のような問題点がある。
By the way, in the vibration suppressing device in the above-mentioned Japanese Patent Application No. 60-241045, in order to make the vibration period of the liquid in the storage tank and the natural period of the building match, the same shape and the same shape are used. When using a plurality of large storage tanks (in the case of the second and third embodiments), the water depths in the plurality of storage tanks were all set to the same, but in this case, there are the following problems. ..

【0006】構造物の振幅が大きい場合(スロッシン
グダンパーの水の動きも大きい)、スロッシングダンパ
ーの減衰が大きくなり、仮に同調が上手くできてもダン
パーの性能が低下する。 全ての貯留タンクの水深を同じに設定すると、液体振
動の非線形性のため同じ振動数で2次、3次の高調波が
生じ、建物の高次振動を励起する可能性がある。 全ての貯留タンクの水深を同じに設定したスロッシン
グダンパーの減衰は、小振幅時であまり大きくないため
同調が上手くいかないと大幅に性能が低下する。また、
広い範囲の振動数成分を持つ外力に対する制振効果が小
さい。 また、上記スロッシングダンパー以外の上述した質量効
果利用方式の振動抑制装置にあっても、複数の振動系を
設ける場合、振動系を構造物の固有振動数に合致させる
必要があるため上記〜と同様な問題点がある。そこ
で、この発明は上記問題点を解決することを目的として
いる。
When the amplitude of the structure is large (the movement of the water in the sloshing damper is also large), the damping of the sloshing damper is large, and even if the tuning is successful, the performance of the damper is deteriorated. If the water depths of all the storage tanks are set to be the same, second and third harmonics are generated at the same frequency due to the non-linearity of liquid vibration, which may excite higher order vibration of the building. The damping of sloshing dampers with the same water depth in all storage tanks is not so great at small amplitudes, and performance will drop significantly if tuning is not successful. Also,
The damping effect against external force having a wide range of frequency components is small. Further, even in the vibration suppressing device of the above-mentioned mass effect utilization system other than the sloshing damper, when a plurality of vibration systems are provided, it is necessary to match the vibration system to the natural frequency of the structure, and the same as above. There is a problem. Then, this invention aims at solving the said problem.

【0007】[0007]

【課題を解決するための手段】上記目的を達成するため
に、この発明の請求項1の構造物の振動抑制装置は構造
物の所定の位置に設置されて地震や風あるいは交通振動
等の外力により上記構造物に励起される振動を抑制する
構造物の振動抑制装置であって、複数の振動系を備え、
これら複数の振動系のうち一部の振動系を、上記構造物
の固有振動数と同一の振動数で振動するように構成し、
他の複数の振動系を上記構造物の固有振動数に対して少
しずつ異なる振動数で振動するように構成したものであ
る。
In order to achieve the above object, the structure vibration suppressing device according to claim 1 of the present invention is installed at a predetermined position of the structure and an external force such as an earthquake, wind or traffic vibration is applied. By the structure vibration suppressing device for suppressing the vibration excited in the structure by, comprising a plurality of vibration system,
Part of the plurality of vibration systems is configured to vibrate at the same frequency as the natural frequency of the structure,
Another plurality of vibration systems are configured to vibrate at a frequency slightly different from the natural frequency of the structure.

【0008】また、請求項2の構造物の振動抑制装置
は、請求項1記載の構造物の振動抑制装置において、複
数の振動系を、複数個の貯留タンクにそれぞれ液体を貯
留することによって構成し、これら複数個の貯留タンク
のうち一部の貯留タンクには、上記構造物の固有振動数
と同一の振動数で振動するように液体を貯留し、他の複
数の貯留タンクのそれぞれには、上記構造物の固有振動
数に対して少しずつ異なる振動数で振動するように液体
をそれぞれ貯留したものである。
Further, a structure vibration suppressing device according to a second aspect is the structure vibration suppressing device according to the first aspect, wherein a plurality of vibration systems are respectively configured to store liquid in a plurality of storage tanks. However, in some of the plurality of storage tanks, the liquid is stored so as to vibrate at the same frequency as the natural frequency of the structure, and in each of the other plurality of storage tanks. The liquid is stored so that it vibrates at a frequency slightly different from the natural frequency of the structure.

【0009】[0009]

【作用】この発明の請求項1の構造物の振動抑制装置に
あっては、一部の振動系が構造物の固有振動数と同一の
振動数で振動する一方、他の振動系が構造物の固有振動
数に対して少しずつ異なる振動数で振動するので、同調
が完全でなくても優れた制振効果を得ることができると
ともに、高次振動の発生も、振動系相互で打ち消すこと
ができ、さらに微小振幅時においても広い範囲の外力に
対して優れた制振効果を発揮することができる。
In the vibration suppressing device for a structure according to claim 1 of the present invention, a part of the vibration system vibrates at the same frequency as the natural frequency of the structure, while the other vibration system is the structure. Since it vibrates at a frequency slightly different from the natural frequency of, it is possible to obtain excellent damping effect even if the tuning is not perfect, and it is also possible to cancel the occurrence of higher-order vibrations between the vibration systems. Moreover, it is possible to exert an excellent vibration damping effect against a wide range of external force even when the amplitude is small.

【0010】また、請求項2の構造物の振動抑制装置に
あっては、振動系を貯留タンクに液体を貯留した簡単な
構成にしたので、振動系の製作、設置等が簡単である
上、一部の貯留タンク内の液体が構造物の固有振動数と
同一の振動数で振動する一方、他の複数の貯留タンク内
のそれぞれの液体が構造物の固有振動数に対して少しず
つ異なる振動数で振動するので、同調が完全でなくても
優れた制振効果を得ることができるとともに、高次振動
の発生も、貯留タンク相互で打ち消すことができ、さら
に微小振幅時においても広い範囲の外力に対して優れた
制振効果を発揮することができる。
Further, in the vibration suppressing device for a structure according to claim 2, since the vibration system has a simple structure in which the liquid is stored in the storage tank, the vibration system can be manufactured and installed easily. The liquid in some storage tanks vibrates at the same frequency as the natural frequency of the structure, while the liquids in other storage tanks slightly differ from the natural frequency of the structure. Since it vibrates with a number of vibrations, excellent damping effect can be obtained even if the tuning is not perfect, the occurrence of higher-order vibrations can be canceled by the storage tanks, and even in the case of a small amplitude, a wide range of vibrations can be obtained. It is possible to exert excellent vibration damping effect against external force.

【0011】[0011]

【実施例】以下、図面を参照してこの発明の構造物の振
動抑制装置の一実施例を説明する。図1は振動抑制装置
1を示す正面図であり、この振動抑制装置1は、建築あ
るいは土木構造物中の所定の位置に設置されるものであ
る。該振動抑制装置1は、上下方向に積層された複数
(図においては5個)の貯留タンク2…と、これら貯留
タンク2を積層状態で支持する4本の支柱3…と、これ
ら支柱3…を支持する支持板4と、上記貯留タンク2に
貯留された液体Lとから概略構成されている。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a structure vibration suppressing device according to the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing a vibration suppressing device 1. The vibration suppressing device 1 is installed at a predetermined position in a building or a civil engineering structure. The vibration suppressing device 1 includes a plurality of (five in the figure) storage tanks 2 stacked in the vertical direction, four columns 3 supporting the storage tanks 2 in a stacked state, and columns 3 ... And a liquid L stored in the storage tank 2 described above.

【0012】上記貯留タンク2は、有底円筒状のタンク
本体4とこのタンク本体4の開口部を閉塞する蓋体5と
により構成されている。貯留タンク2の外周部には軸方
向に延びる4条の凹部6…が周方向に等間隔で形成され
ており、これら凹部6に上記支柱3を係合させることに
よって貯留タンク2…が積層状態で支持されている。上
記タンク本体4は例えば透明な樹脂等で形成されたもの
であり、その外周面には液体Lの水深を測定できるよう
に、目盛り7が付されている。各タンク本体4には液体
Lが貯留されているが、この液体Lはその量すなわち各
タンク本体4における水深が上方のタンク本体4ほど浅
くなるようにして貯留されている。
The storage tank 2 is composed of a bottomed cylindrical tank body 4 and a lid 5 for closing the opening of the tank body 4. Four recesses 6 extending in the axial direction are formed in the outer peripheral portion of the storage tank 2 at equal intervals in the circumferential direction, and the support tanks 3 are engaged with these recesses 6 to stack the storage tanks 2. Supported by. The tank body 4 is made of, for example, a transparent resin and has a scale 7 on its outer peripheral surface so that the water depth of the liquid L can be measured. The liquid L is stored in each tank main body 4, and the liquid L is stored such that the amount thereof, that is, the water depth in each tank main body 4 becomes shallower toward the upper tank main body 4.

【0013】また、上記貯留タンク2…のうち上から3
番目すなわち中央の貯留タンク2においては、構造物の
固有振動数と同一の振動数で液体Lが振動するように、
該液体Lの水深が決定され、他の貯留タンク2…には構
造物の固有振動数に対して少しずつ異なる振動数で振動
するように液体Lの水深を少しずつ変えて該液体Lが貯
留されている。
In addition, among the storage tanks 2 ...
In the second storage tank 2 at the center, the liquid L vibrates at the same frequency as the natural frequency of the structure,
The water depth of the liquid L is determined, and the water depth of the liquid L is gradually changed in the other storage tanks 2 so that it vibrates at a frequency slightly different from the natural frequency of the structure. Has been done.

【0014】上述した振動抑制装置1は、本発明の一実
施例、すなわち複数の貯留タンク2…を積層状態にした
例であり、他の実施例として、単に複数のタンク2…を
並列に設置してもよい。この場合においても、複数の貯
留タンク2…のうち一部の貯留タンク2に、構造物の固
有振動数と同一の振動数で振動するように液体Lの水深
を決定して該液体Lを貯留し、他の貯留タンク2…に
は、構造物の固有振動数に対して少しずつ異なる振動数
で振動するように液体Lの水深を少しずつ変えて該液体
Lを貯留する。
The above-described vibration suppressing device 1 is an embodiment of the present invention, that is, an example in which a plurality of storage tanks 2 are stacked, and as another embodiment, a plurality of tanks 2 are simply installed in parallel. You may. Also in this case, the water depth of the liquid L is determined so that the liquid L is stored in some of the plurality of storage tanks 2 so as to vibrate at the same frequency as the natural frequency of the structure. The liquid L is stored in the other storage tanks 2 by gradually changing the water depth of the liquid L so that the liquid L vibrates at a frequency slightly different from the natural frequency of the structure.

【0015】ここで、貯留タンクを例えば270個設置
する場合について説明すると、スロッシングの固有振動
数を、fD1、fD2、fD3……fD30として、 fD1=0.9fS(fSは建物の固有振動数)、……、f
D30=1.1fSとなるように、30にグループ分けした貯
留タンクの水深を設定する。水深の分布は一定分布とす
れば、 fDi=0.9fS+0.2/29(i−1)fS (i=
1、2……30) で求めることができる。これを一般化すれば、下限振動
数fDL、上限振動数fDU、グループ分別数Nとして、各
貯留タンクのスロッシングの固有振動数fDiは、 fDi=fDL+(fDU−fDL)(i−1)fS/N−1 として求められ、この振動数を得られるように各貯留タ
ンクの水深を決定する。
Here, the case of installing, for example, 270 storage tanks will be described. Assuming that the natural frequencies of sloshing are f D1 , f D2 , f D3 ... F D30 , f D1 = 0.9f S (f S Is the natural frequency of the building), ..., f
Set the water depth of the storage tanks grouped into 30 so that D30 = 1.1 f S. Assuming that the distribution of water depth is constant, f Di = 0.9f S + 0.2 / 29 (i-1) f S (i =
It can be obtained by 1, 2 ... 30). Generalizing this, assuming that the lower limit frequency f DL , the upper limit frequency f DU , and the group classification number N, the natural frequency f Di of sloshing of each storage tank is f Di = f DL + (f DU −f DL ) (i-1) obtained as f S / N-1, to determine the depth of each storage tank so as to obtain the frequency.

【0016】このようにして各貯留タンクに水深が決定
された振動抑制装置の振動抑制の効果を図2および図3
に示す。また、各貯留タンクの水深が全て同一の従来の
振動抑制装置の振動抑制の効果を図4および図5に示
す。なお、これらの図において符号、、および
で示す曲線は減衰定数がそれぞれ15%、10%、5%
および2%の場合をそれぞれ示し、一点鎖線は振動抑制
装置を設置していない場合を示す。また、図2および図
4はチューニング(同調)がほぼ完全な場合を示し、図
3および図5は−10%のミスチューニングの場合を示
している。図2ないし図5から明らかなように、本願発
明の振動抑制装置では減衰が小さい場合(減衰定数が5
または2%の場合)でも安定した制振効果を得ることが
できる。また、−10%のミスチューニングの場合に
も、従来の振動抑制装置では制振効果の低下が大きいの
に対して、殆ど性能の低下がないことが解かる。
2 and 3 show the vibration suppressing effect of the vibration suppressing device in which the water depth is determined in each storage tank in this manner.
Shown in. 4 and 5 show the vibration suppressing effect of the conventional vibration suppressing device having the same water depth in each storage tank. In these figures, the curves indicated by symbols, and have damping constants of 15%, 10%, and 5%, respectively.
And 2%, respectively, and the one-dot chain line shows the case where no vibration suppressing device is installed. 2 and 4 show the case where tuning is almost perfect, and FIGS. 3 and 5 show the case of -10% mistuning. As is clear from FIGS. 2 to 5, in the vibration suppressing device of the present invention, when the damping is small (the damping constant is 5
Or 2%), a stable vibration damping effect can be obtained. Further, even in the case of -10% mistuning, it can be seen that the conventional vibration suppressing device has a large decrease in the vibration damping effect, but has almost no decrease in the performance.

【0017】しかして、上記構成の振動抑制装置によれ
ば次のような効果を得ることができる。 複数の貯留タンク2…のうち一部の貯留タンク2に、
構造物の固有振動数と同一の振動数で振動するように液
体Lの水深を決定して該液体Lを貯留し、他の貯留タン
ク2…には、構造物の固有振動数に対して少しずつ異な
る振動数で振動するように液体Lの水深を少しずつ変え
て該液体Lを貯留したので、同調が完全でなくても、比
較的優れた制振効果を得ることができる。 液体振動の非線形性による高次振動の発生も、各貯留
タンク2の水深がそれぞれ異なっているので、貯留タン
ク相互で打ち消すことができ、建物側に与える悪影響を
小さくすることができる。 微小振幅時においても広い範囲の外力に対して優れた
制振効果を発揮することができる。
Therefore, according to the vibration suppressing device having the above structure, the following effects can be obtained. Some of the plurality of storage tanks 2 ...
The water depth of the liquid L is determined so as to vibrate at the same frequency as the natural frequency of the structure, and the liquid L is stored. Since the liquid L is stored by gradually changing the water depth of the liquid L so that the liquid L vibrates at different frequencies, a relatively excellent vibration damping effect can be obtained even if the synchronization is not perfect. The occurrence of higher-order vibrations due to the non-linearity of liquid vibrations can be canceled out by the storage tanks because the water depths of the storage tanks 2 are different, and the adverse effect on the building side can be reduced. It is possible to exert an excellent vibration damping effect against a wide range of external force even at a minute amplitude.

【0018】なお、上記実施例では、各貯留タンク2に
貯留された液体の振動数を変えるのに、同形・同大の複
数の貯留タンク2…を用い、各貯留タンク2の液体の水
深を調節することによって行ったが、本発明はこれに限
ることなく、貯留タンクの形状、大きさ等を変えるこ
と、あるいはこのことと、上述した水深を変化させるこ
ととの組み合わせによって行ってもよい。
In the above embodiment, a plurality of storage tanks 2 of the same shape and size are used to change the frequency of the liquid stored in each storage tank 2, and the depth of the liquid in each storage tank 2 is changed. However, the present invention is not limited to this, and the present invention may be performed by changing the shape, size, etc. of the storage tank, or by combining this with changing the water depth described above.

【0019】また、上記実施例では、質量効果利用方式
の振動抑制装置の一つである貯留タンク2…を利用した
ものについて説明したが、この他の質量効果利用方式の
振動抑制装置、例えば、振動系として振り子を用いた場
合についても同様な効果を得ることができる。この場
合、多数の振り子のうち一部の振り子を、上記構造物の
固有振動数と同一の振動数で振動するように構成し、他
の複数の振り子を上記構造物の固有振動数に対して少し
ずつ異なる振動数で振動するように構成すればよい。具
体的には振り子の支点から重心までの長さを少しずつ変
更すればよい。
In the above embodiment, the storage tanks 2 ... Which are one of the mass effect utilizing type vibration suppressing devices have been described. However, other mass effect utilizing type vibration suppressing devices, for example, Similar effects can be obtained when a pendulum is used as the vibration system. In this case, a part of a large number of pendulums is configured to vibrate at the same frequency as the natural frequency of the structure, and another plurality of pendulums are used for the natural frequency of the structure. It may be configured to vibrate at slightly different frequencies. Specifically, the length from the fulcrum of the pendulum to the center of gravity may be changed little by little.

【0020】さらに、構造物の動きを構造物内に設置し
たセンサーで検出し、構造物に取り付けられた質量を構
造物の動きと逆位相になるように自動制御して、構造物
の揺れを抑さえる自動制御機構においても、力学的原理
は上述した質量効果機構と同じであるので、この場合に
おいても質量を複数設け、該質量が構造物の固有振動数
に対して少しずつ異なる振動数で振動するように構成す
ればよい。
Further, the movement of the structure is detected by a sensor installed in the structure, and the mass attached to the structure is automatically controlled so as to be in a phase opposite to that of the movement of the structure to prevent the structure from shaking. Even in the automatic control mechanism for suppressing, the mechanical principle is the same as the above-mentioned mass effect mechanism, and therefore in this case also, a plurality of masses are provided, and the masses have a frequency slightly different from the natural frequency of the structure. It may be configured to vibrate.

【0021】[0021]

【発明の効果】以上説明したように、この発明の請求項
1の構造物の振動抑制装置によれば、次のような効果を
得ることができる。 一部の振動系が構造物の固有振動数と同一の振動数で
振動する一方、他の振動系が構造物の固有振動数に対し
て少しずつ異なる振動数で振動するので、同調が完全で
なくても、比較的優れた制振効果を得ることができる。 振動系が非線形性の場合において、該非線形性による
高次振動の発生も、振動系相互で打ち消すことができ、
建物側に与える悪影響を小さくすることができる。 微小振幅時においても広い範囲の外力に対して優れた
制振効果を発揮することができる。
As described above, according to the structure vibration suppressing device of the first aspect of the present invention, the following effects can be obtained. Some vibration systems vibrate at the same frequency as the natural frequency of the structure, while other vibration systems vibrate at slightly different frequencies than the natural frequency of the structure, so perfect tuning is achieved. Even without it, a relatively excellent vibration damping effect can be obtained. In the case where the vibration system is non-linear, the occurrence of higher-order vibration due to the non-linearity can also be canceled by the vibration systems,
The adverse effect on the building side can be reduced. It is possible to exert an excellent vibration damping effect against a wide range of external force even at a minute amplitude.

【0022】また、請求項2の構造物の振動抑制装置に
よれば、次のような効果を得ることができる。 振動系を貯留タンクに液体を貯留した簡単な構成にし
たので、振動系の製作、設置等を簡単に行うことができ
る。 一部の貯留タンク内の液体が構造物の固有振動数と同
一の振動数で振動する一方、他の複数の貯留タンク内の
それぞれの液体が構造物の固有振動数に対して少しずつ
異なる振動数で振動するので、同調が完全でなくても、
比較的優れた制振効果を得ることができる。 液体振動の非線形性による高次振動の発生も、貯留タ
ンク相互で打ち消すことができ、建物側に与える悪影響
を小さくすることができる。 微小振幅時においても広い範囲の外力に対して優れた
制振効果を発揮することができる。
Further, according to the structure vibration suppressing device of the second aspect, the following effects can be obtained. Since the vibration system has a simple structure in which the liquid is stored in the storage tank, it is possible to easily manufacture and install the vibration system. The liquid in some storage tanks vibrates at the same frequency as the natural frequency of the structure, while the liquids in other storage tanks slightly differ from the natural frequency of the structure. Because it vibrates with a number, even if the tuning is not perfect,
A relatively excellent vibration damping effect can be obtained. The occurrence of high-order vibration due to the non-linearity of liquid vibration can also be canceled by the storage tanks, and the adverse effect on the building side can be reduced. It is possible to exert an excellent vibration damping effect against a wide range of external force even at a minute amplitude.

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

【図1】本発明の振動抑制装置の一実施例を示す正面図
である。
FIG. 1 is a front view showing an embodiment of a vibration suppressing device of the present invention.

【図2】本発明の振動抑制装置において、ほぼ完全なチ
ューニングが行われたときの制振効果を示すグラフであ
る。
FIG. 2 is a graph showing a vibration damping effect when almost complete tuning is performed in the vibration suppressing device of the present invention.

【図3】本発明の振動抑制装置において、−10%のミ
スチューニングが行われたときの制振効果を示すグラフ
である。
FIG. 3 is a graph showing a vibration damping effect when -10% mistuning is performed in the vibration suppressing device of the present invention.

【図4】従来の振動抑制装置において、ほぼ完全なチュ
ーニングが行われたときの制振効果を示すグラフであ
る。
FIG. 4 is a graph showing a vibration damping effect when almost complete tuning is performed in a conventional vibration suppression device.

【図5】従来の振動抑制装置において、−10%のミス
チューニングが行われたときの制振効果を示すグラフで
ある。
FIG. 5 is a graph showing a vibration damping effect when -10% mistuning is performed in the conventional vibration suppressing device.

【符号の説明】[Explanation of symbols]

1 振動抑制装置 2 貯留タンク 4 タンク本体 L 液体 1 Vibration Suppressor 2 Storage Tank 4 Tank Body L Liquid

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 構造物の所定の位置に設置されて地震や
風あるいは交通振動等の外力により上記構造物に励起さ
れる振動を抑制する構造物の振動抑制装置であって、複
数の振動系を備え、これら複数の振動系のうち一部の振
動系を、上記構造物の固有振動数と同一の振動数で振動
するように構成し、他の複数の振動系を上記構造物の固
有振動数に対して少しずつ異なる振動数で振動するよう
に構成したことを特徴とする構造物の振動抑制装置。
1. A vibration suppressing device for a structure, which is installed at a predetermined position of a structure and suppresses a vibration excited in the structure by an external force such as an earthquake, wind, or traffic vibration, and a plurality of vibration systems. A part of the plurality of vibration systems is configured to vibrate at the same frequency as the natural frequency of the structure, and the other plurality of vibration systems are configured to vibrate the natural vibration of the structure. A vibration suppressing device for a structure, wherein the vibration suppressing device is configured to vibrate at a frequency slightly different from the number of vibrations.
【請求項2】 請求項1記載の構造物の振動抑制装置に
おいて、複数の振動系を、複数個の貯留タンクにそれぞ
れ液体を貯留することによって構成し、これら複数個の
貯留タンクのうち一部の貯留タンクには、上記構造物の
固有振動数と同一の振動数で振動するように液体を貯留
し、他の複数の貯留タンクのそれぞれには、上記構造物
の固有振動数に対して少しずつ異なる振動数で振動する
ように液体をそれぞれ貯留したことを特徴とする構造物
の振動抑制装置。
2. The vibration suppressing device for a structure according to claim 1, wherein a plurality of vibration systems are configured by respectively storing liquids in a plurality of storage tanks, and a part of the plurality of storage tanks. In the storage tank of, the liquid is stored so as to vibrate at the same frequency as the natural frequency of the structure, and in each of the other plurality of storage tanks, a little A vibration suppressing device for a structure, characterized in that liquids are stored so as to vibrate at different frequencies.
JP03315033A 1991-11-28 1991-11-28 Vibration suppression device for structures Expired - Fee Related JP3116142B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP03315033A JP3116142B2 (en) 1991-11-28 1991-11-28 Vibration suppression device for structures

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP03315033A JP3116142B2 (en) 1991-11-28 1991-11-28 Vibration suppression device for structures

Publications (2)

Publication Number Publication Date
JPH05149026A true JPH05149026A (en) 1993-06-15
JP3116142B2 JP3116142B2 (en) 2000-12-11

Family

ID=18060618

Family Applications (1)

Application Number Title Priority Date Filing Date
JP03315033A Expired - Fee Related JP3116142B2 (en) 1991-11-28 1991-11-28 Vibration suppression device for structures

Country Status (1)

Country Link
JP (1) JP3116142B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0953682A (en) * 1995-08-18 1997-02-25 Univ Kyoto Pendulum structure
JPH1194016A (en) * 1997-09-26 1999-04-09 Tokai Univ Rolling type vibration control device and vibration control structure using it

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0953682A (en) * 1995-08-18 1997-02-25 Univ Kyoto Pendulum structure
JPH1194016A (en) * 1997-09-26 1999-04-09 Tokai Univ Rolling type vibration control device and vibration control structure using it

Also Published As

Publication number Publication date
JP3116142B2 (en) 2000-12-11

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