JPH0341700B2 - - Google Patents
Info
- Publication number
- JPH0341700B2 JPH0341700B2 JP28627087A JP28627087A JPH0341700B2 JP H0341700 B2 JPH0341700 B2 JP H0341700B2 JP 28627087 A JP28627087 A JP 28627087A JP 28627087 A JP28627087 A JP 28627087A JP H0341700 B2 JPH0341700 B2 JP H0341700B2
- Authority
- JP
- Japan
- Prior art keywords
- frame
- suspended
- damper
- string
- oscillate
- 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.)
- Expired
Links
- 239000006096 absorbing agent Substances 0.000 claims description 10
- 238000010586 diagram Methods 0.000 description 3
- 238000013016 damping Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/10—Vibration-dampers; Shock-absorbers using inertia effect
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Vibration Prevention Devices (AREA)
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は構造物の共振による振動を抑制する振
子式動吸振器に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a pendulum type dynamic vibration absorber that suppresses vibrations due to resonance of a structure.
［従来の技術］
構造物が共振して振動が生じる場合、構造物と
同じ固有振動数を有する振動体を構造物に付加し
て振動を抑制する動吸振器を用いるが、従来は対
象とする構造物の固有振動数が低いときは第３図
に示すように重錘１をワイヤ２によつて構造物３
から吊下げる振子式動吸振器を用いていた。[Prior art] When a structure resonates and causes vibration, a dynamic vibration absorber is used to suppress vibration by adding a vibrating body having the same natural frequency as the structure to the structure, but conventionally When the natural frequency of the structure is low, as shown in Fig. 3, the weight 1 is connected to the structure 3 using the wire 2.
A pendulum-type dynamic vibration absorber suspended from the ground was used.
［発明が解決しようとする問題点］
しかし、固有振動数ｆが極端に低い橋梁や高層
ビル等の長大構造物の場合固有振動数ｆは
（ｇ：重力加速度、ｌ：振子長さ）
となるので、対象とする構造物３の固有振動数ｆ
が
ｆ＝0.1（Hz）
であるとすると、同じ固有振動数ｆを有する振子
をなすワイヤ２の長さｌは
ｌ≒25（ｍ）
となり、振子長さが長くなるのでスペース上問題
となる。[Problems to be solved by the invention] However, in the case of long structures such as bridges and high-rise buildings where the natural frequency f is extremely low, the natural frequency f is (g: gravitational acceleration, l: pendulum length), so the natural frequency f of the target structure 3 is
If f = 0.1 (Hz), the length l of the wire 2 forming the pendulum having the same natural frequency f is l≒25 (m), which causes a problem in terms of space since the length of the pendulum becomes long.
本発明は上述の問題点を解決するもので、垂直
方向の長さを短くし且つ低い固有振動数の振動を
抑制する振子式動吸振器を提供することを目的と
している。 The present invention solves the above-mentioned problems, and aims to provide a pendulum-type dynamic vibration absorber that has a short vertical length and suppresses vibrations of low natural frequencies.
［問題点を解決するための手段］
本発明は構造物に、１組の紐状体で第１番目の
フレームを動揺し得るよう吊下げ且つ第１番目の
フレームを減衰ダンパを介し該構造物と連結し、
該第１番目のフレーム内側に、第１番目のフレー
ムから吊下げた紐状体により第２番目のフレーム
を動揺し得るよう吊下げ且つ第２番目のフレーム
を減衰ダンパを介し前記第１番目のフレームと連
結し、同様に順次第ｎ−１番目のフレーム内側
に、第ｎ−１番目のフレームから吊下げた紐状体
により第ｎ番目のフレームを動揺し得るよう吊下
げ且つ第ｎ番目のフレームを減衰ダンパを介し前
記第ｎ−１番目のフレームと連結し、最後の吊下
げたｎ番目のフレーム内側に、１組の紐状体で重
錘を動揺し得るよう吊下げ且つ重錘を減衰ダンパ
を介し前記最後に吊下げたｎ番目のフレームと連
結した構成を備えている。[Means for Solving the Problems] The present invention suspends a first frame from a structure using a set of string-like bodies so that it can oscillate, and connects the first frame to the structure via an attenuation damper. Connect with
A second frame is suspended inside the first frame by a string-shaped body suspended from the first frame, and the second frame is connected to the first frame through a damper. The n-th frame is connected to the frame, and similarly, the n-th frame is suspended so that it can be moved by a string-like body suspended from the n-1-th frame inside the n-1-th frame, and the n-th frame is The frame is connected to the (n-1)th frame via an attenuation damper, and a weight is suspended inside the last suspended n-th frame so that the weight can be oscillated. It has a configuration in which it is connected to the last suspended n-th frame via an attenuation damper.
［作用］
従つて本発明では振子式動吸振器を複数組の紐
状体と複数のフレームを用いて形成しているの
で、垂直方向の長さが短くなる。[Function] Therefore, in the present invention, since the pendulum type dynamic vibration absorber is formed using a plurality of sets of string-like bodies and a plurality of frames, the length in the vertical direction is shortened.
［実施例］
以下、本発明の実施例を図面を参照しつつ説明
する。[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.
第１図は本発明の一実施例を示すもので、構造
物３から１組のワイヤ２′で門型形状を有する第
１番目のフレーム５を動揺し得るよう吊下げ且つ
減衰ダンパ４を介し該構造物３と連結し、該第１
番目のフレーム５内側に第１番目のフレーム５を
吊下げたワイヤ２′と同じ長さの１組のワイヤ
２″で門型形状を有する第２番目のフレーム６を
動揺し得るよう吊下げ且つ減衰ダンパ４′を介し
前記第１番目のフレーム５と連結し、該第２番目
のフレーム６内側に第１番目のフレーム５を吊下
げたワイヤ２′と同じ長さの１組のワイヤ２で
重錘１を動揺し得るよう吊下げ且つ減衰ダンパ
４″を介し前記第２番目のフレームと連結してい
る。 FIG. 1 shows an embodiment of the present invention, in which a first frame 5 having a portal shape is suspended from a structure 3 by a set of wires 2' and is suspended via a damper 4 so as to be able to oscillate. connected to the structure 3;
A second frame 6 having a portal shape is suspended by a set of wires 2'' having the same length as the wires 2' by which the first frame 5 is suspended inside the second frame 5 so as to be able to swing. A set of wires 2 connected to the first frame 5 through an attenuation damper 4' and having the same length as the wire 2' that suspended the first frame 5 inside the second frame 6. The weight 1 is suspended so that it can oscillate and is connected to the second frame via a damper 4''.
上述のように構成したので、実施例の振子式動
吸振器の固有振動数ｆは
となるので対象とする構造物の固有振動数ｆが
ｆ＝0.1（Hz）
であるとすると、ワイヤ２′，２″，２の長さ
l′は
l′＝25／３≒8.3（ｍ）
となり、振子式動吸振器の垂直方向の長さを短く
することができる。 Since it is configured as described above, the natural frequency f of the pendulum type dynamic vibration absorber of the example is Therefore, if the natural frequency f of the target structure is f = 0.1 (Hz), the lengths of wires 2', 2'', 2
l' becomes l'=25/3≒8.3 (m), and the vertical length of the pendulum type dynamic vibration absorber can be shortened.
第２図は本発明の他の実施例を示すもので図示
されていない構造物から１組のワイヤ２′で第１
番目のフレーム５を矢印ｘ及び矢印ｙの両方向に
動揺し得るように吊下げ且つ図示されていないダ
ンパを介し該図示されていない構造物と連結し、
該第１番目のフレーム５内側に第１番目のフレー
ム５を吊下げたワイヤ２′と同じ長さの１組のワ
イヤ２″で第２番目のフレーム６を矢印ｘ及び矢
印ｙの両方向ち動揺し得るよう吊下げ且つ図示さ
れていない減衰ダンパを介し前記第１番目のフレ
ーム５と連結し、該第２番目のフレーム６内側に
第１番目のフレーム５を吊下げたワイヤ２′と同
じ長さの１組のワイヤ２で重錘１を矢印ｘ及び
矢印ｙを両方向に吊下げ且つ図示されていない減
衰ダンパを介し前記第２番目のフレーム６と連結
した構成をしているので、２方向の振動を抑制す
ることができる。 FIG. 2 shows another embodiment of the invention in which a set of wires 2' are connected to the first wire from a structure not shown.
The frame 5 is suspended so as to be able to swing in both directions of arrows x and y, and is connected to the structure (not shown) via a damper (not shown);
The second frame 6 is swayed in both directions of arrows x and y using a set of wires 2'' having the same length as the wires 2' by which the first frame 5 is suspended inside the first frame 5. A wire 2' having the same length as the wire 2' by which the first frame 5 is suspended and connected to the first frame 5 through a damper (not shown), and the first frame 5 is suspended inside the second frame 6. The weight 1 is suspended by a set of wires 2 in both directions of the arrows x and y, and is connected to the second frame 6 via an attenuation damper (not shown), so that it can be suspended in two directions. vibration can be suppressed.
なお、本発明は上述の実施例のみに限定される
ものではなく、ワイヤの代わりにチエーン等でフ
レームを吊下げること、吊下げるフレームの数を
増すこと、減衰ダンパ以外の減衰装置を用いるこ
と、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。 Note that the present invention is not limited to the above-described embodiments, and may include suspending the frame with a chain or the like instead of a wire, increasing the number of suspended frames, using a damping device other than a damping damper, Of course, various changes can be made without departing from the spirit of the invention.
［発明の効果］
以上述べたように本発明の振子式動吸振器によ
れば、垂直方向の長さを短くすることができるの
でスペース上有利であり、且つ極めて低い固有振
動数の抑制に対応することができるという優れた
作用効果を奏し得る。[Effects of the Invention] As described above, the pendulum type dynamic vibration absorber of the present invention is advantageous in terms of space because the vertical length can be shortened, and can suppress extremely low natural frequencies. It can exhibit excellent effects such as being able to.
第１図は本発明の一実施例を示す図、第２図は
本発明の他の実施例を示す図、第３図は従来の振
子式動吸振器を示す図である。
１は重錘、２，２′，２″，２はワイヤ、４，
４′，４″はダンパ、５は第１番目のフレーム、６
は第２番目のフレームを示す。
FIG. 1 is a diagram showing one embodiment of the present invention, FIG. 2 is a diagram showing another embodiment of the present invention, and FIG. 3 is a diagram showing a conventional pendulum type dynamic vibration absorber. 1 is a weight, 2, 2', 2'', 2 is a wire, 4,
4', 4'' are dampers, 5 is the first frame, 6
indicates the second frame.
Claims (1)
ムを動揺し得るよう吊下げ且つ第１番目のフレー
ムを減衰ダンパを介し該構造物と連結し、該第１
番目のフレーム内側に、第１番目のフレームから
吊下げた紐状体により第２番目のフレームを動揺
し得るよう吊下げ且つ第２番目のフレームを減衰
ダンパを介し前記第１番目のフレームと連結し、
同様に順次第ｎ−１番目のフレーム内側に、第ｎ
−１番目のフレームから吊下げた紐状体により第
ｎ番目のフレームを動揺し得るよう吊下げ且つ第
ｎ番目のフレームを減衰ダンパを介し前記第ｎ−
１番目のフレームと連結し、最後に吊下げたｎ番
目のフレーム内側に、１組の紐状体で重錘を動揺
し得るよう吊下げ且つ重錘を減衰ダンパを介し前
記最後に吊下げたｎ番目のフレームと連結したこ
とを特徴とする振子式動吸振器。1. A first frame is suspended from a structure by a set of string-like bodies so as to be able to oscillate, and the first frame is connected to the structure via an attenuation damper, and the first frame is
A second frame is suspended inside the first frame so as to be able to oscillate by a string-like body suspended from the first frame, and the second frame is connected to the first frame via an attenuation damper. death,
Similarly, inside the n-1th frame,
- The n-th frame is suspended by a string-like body suspended from the first frame so as to be able to oscillate, and the n-th frame is connected to the n-th frame through an attenuation damper.
A weight was suspended inside the n-th frame, which was connected to the first frame and suspended last, using a pair of string-like bodies so as to be able to oscillate, and the weight was suspended at the last frame via an attenuation damper. A pendulum type dynamic vibration absorber characterized by being connected to an n-th frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28627087A JPH01131353A (en) | 1987-11-12 | 1987-11-12 | Pendulum type dynamic vibration absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28627087A JPH01131353A (en) | 1987-11-12 | 1987-11-12 | Pendulum type dynamic vibration absorber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01131353A JPH01131353A (en) | 1989-05-24 |
| JPH0341700B2 true JPH0341700B2 (en) | 1991-06-24 |
Family
ID=17702190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28627087A Granted JPH01131353A (en) | 1987-11-12 | 1987-11-12 | Pendulum type dynamic vibration absorber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01131353A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0230858A (en) * | 1988-07-19 | 1990-02-01 | Kajima Corp | Multistage pendulum type dynamic vibration absorber |
| JP2713599B2 (en) * | 1989-02-13 | 1998-02-16 | 三菱重工業株式会社 | Damping device |
| JPH02292545A (en) * | 1989-05-08 | 1990-12-04 | Mitsubishi Heavy Ind Ltd | Damping device |
| JPH0729901Y2 (en) * | 1989-07-29 | 1995-07-12 | シロキ工業株式会社 | Lumbar support |
| WO1992002743A1 (en) * | 1990-08-10 | 1992-02-20 | Mitsubishi Jukogyo Kabushiki Kaisha | Vibration-damping apparatus |
| JP5323391B2 (en) * | 2008-05-09 | 2013-10-23 | 鹿島建設株式会社 | Vibration suppression device |
| JP6198297B2 (en) * | 2013-03-15 | 2017-09-20 | 三菱重工業株式会社 | Long-period vibration damping device |
-
1987
- 1987-11-12 JP JP28627087A patent/JPH01131353A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01131353A (en) | 1989-05-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080624 Year of fee payment: 17 |