JPH01320346A - Torsional vibration prevention device - Google Patents
Torsional vibration prevention deviceInfo
- Publication number
- JPH01320346A JPH01320346A JP14952288A JP14952288A JPH01320346A JP H01320346 A JPH01320346 A JP H01320346A JP 14952288 A JP14952288 A JP 14952288A JP 14952288 A JP14952288 A JP 14952288A JP H01320346 A JPH01320346 A JP H01320346A
- Authority
- JP
- Japan
- Prior art keywords
- torsional vibration
- prevention device
- rod
- vibration prevention
- vibration
- 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
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)
- Bridges Or Land Bridges (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Vibration Prevention Devices (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は、橋梁やビル等の構造物及び船舶等のねじれ
振動を防止する装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for preventing torsional vibration of structures such as bridges and buildings, and ships.
［従来技術］
構造物等の振動を防止する装置としては、従来水平振動
を防止するものとして、特開昭５９−１０３０４８号及
び特開昭６２−４６０４２号に開示された装置が、また
上下振動を防止するものとして、特開昭６２−２０３１
号に開示された装置がある。第３図は、特開昭５９−１
０３０４８号に開示された、水平振動を防止するための
振り子式動吸振器である。この動吸振器は、制振すべき
構造物の頂部又はその近傍に固定された支持フレーム１
１と、上端部を線ヒンジ１．２．１２により制御すべき
振動方向に直角な面一ヒにおいて前記支持フレーム１１
に取付けられ、揺動自在に吊り下げられた互いに対向す
る２枚以上の上下方向に長い形状の板１３．１３と、対
向する２枚以上の板の下部に夫々取付けられた重錘と１
４．１．４と、対向する２枚以上の板の相隣れる２枚の
板の間に介在して両者と連結する減衰器１５とから構成
されている。そしてこの場合の減衰器１５は、粘弾性体
ダンパーを鉛直方向に複数枚積み重ねて構成されている
ので、水平方向に２枚以上の板が振り子として揺動する
とき、粘弾性ダンパーは剪断変形をうけて減衰力を生起
することができる。[Prior Art] As devices for preventing vibrations of structures, etc., devices disclosed in Japanese Patent Application Laid-Open Nos. 59-103048 and 62-46042 are conventional devices for preventing horizontal vibrations, and devices for preventing vertical vibrations. As a method for preventing
There is a device disclosed in No. Figure 3 is JP-A-59-1
This is a pendulum-type dynamic vibration absorber for preventing horizontal vibration, disclosed in Japanese Patent No. 03048. This dynamic vibration absorber consists of a support frame 1 fixed at or near the top of a structure to be damped.
1 and the support frame 11 at its upper end in a plane perpendicular to the direction of vibration to be controlled by a line hinge 1.2.12.
two or more vertically elongated plates 13.13 that are attached to and swingably suspended from each other, facing each other; and a weight that is attached to the bottom of each of the two or more opposing plates;
4.1.4, and an attenuator 15 interposed between and connected to two or more adjacent plates of two or more opposing plates. The damper 15 in this case is constructed by stacking a plurality of viscoelastic dampers in the vertical direction, so when two or more plates swing horizontally as a pendulum, the viscoelastic dampers undergo shear deformation. Accordingly, a damping force can be generated.
第４図（ａ）および（ｂ）は、特特開昭６２−２０３１
号に開示された上下振動を防止するための装置である。Figures 4(a) and (b) are from Japanese Patent Application Laid-Open No. 62-2031.
This is a device for preventing vertical vibration disclosed in No.
この装置においては、重錘２１゜２１を備えた上梓２２
が、フレーム２３に固着された主回転軸２４と滑らかに
嵌合している。そして重錘２１，２１は主桿上を摺動で
きるようになっている。またこの上梓２２には、コイル
捩ばね２５．２５の片側が固着され、他端は各々左巻さ
又は右巻きしながら主回転軸２４に固着されている。し
たがって上梓２２は、主回転軸２４を支点としてコイル
捩ばね２５，２５の力をかりて扇形にかつ弾性的に振動
できる。一方補助桿２６の一端は、上板２７上に固着さ
れた台２８．２８に軸受２’）、２９を介して回動可能
に装着された補助回転軸３０に嵌合し、他端は粘弾性体
３１を介して上梓２２に連結されているので、重錘２１
゜２１の上下方向の振動と連動する。このとき粘弾性体
３１は、重錘重錘２１，２１の運動エネルギーを吸収し
、熱エネルギーに変換して発散させるので、振幅は拡大
されることなく安定する。In this device, a top 22 with a weight 21°21 is used.
is smoothly fitted to the main rotating shaft 24 fixed to the frame 23. The weights 21, 21 can slide on the main rod. Further, one side of a coiled torsion spring 25, 25 is fixed to the upper spring 22, and the other end is fixed to the main rotating shaft 24 while being wound left-handed or right-handed, respectively. Therefore, the upper axle 22 can vibrate elastically in a fan shape using the force of the coiled torsion springs 25 and 25 with the main rotating shaft 24 as a fulcrum. On the other hand, one end of the auxiliary rod 26 is fitted into an auxiliary rotating shaft 30 which is rotatably mounted on a base 28.28 fixed on the upper plate 27 via bearings 2') and 29, and the other end is fitted with a Since it is connected to the upper axle 22 via the elastic body 31, the weight 21
It works in conjunction with the vertical vibration of °21. At this time, the viscoelastic body 31 absorbs the kinetic energy of the weights 21, 21, converts it into thermal energy, and releases it, so the amplitude is stabilized without being expanded.
［発明か解決しようとする課題］
上述のような従来技術を構造物の回転やねじれ運動また
は船舶のローリングに適用しようとする場合、つぎのよ
うな問題点があった。すなわち、従来の水平運動や上下
運動に対応する動吸振器をねじれや回転運動に適用しよ
うとする場合には、これらの動吸振器を構造物のねじれ
や回転の中心からなるべく離れたところに設置する必要
があるとともに、安定した制振効果を得るためには、回
転の中心軸を含む同−断面内に、回転の中心軸を挟んで
点対称に２台の動吸振器を配置しなければならず、設備
費がかさむという問題点がある。また従来の上下運動に
対応する動吸振器は、長周期の振動に対応する装置を設
計しようとすると、周期分長くするためにばね定数を小
さくする必要があり、ばねの静的たわみが非常に大きく
なるという問題点もある。[Problems to be Solved by the Invention] When applying the above-mentioned conventional technology to the rotation or twisting motion of a structure or the rolling motion of a ship, there are the following problems. In other words, when applying conventional dynamic vibration absorbers that handle horizontal motion or vertical motion to torsional or rotational motion, these dynamic vibration absorbers should be installed as far away from the center of the torsion or rotation of the structure as possible. In addition, in order to obtain a stable vibration damping effect, it is necessary to place two dynamic vibration absorbers symmetrically across the central axis of rotation within the same cross section that includes the central axis of rotation. However, there is a problem in that the equipment cost increases. In addition, with conventional dynamic vibration absorbers that handle vertical motion, when designing a device that handles long-period vibrations, it is necessary to reduce the spring constant to increase the period, and the static deflection of the spring is extremely high. There is also the problem of getting bigger.
この発明は以上のような従来技術の問題点を解消し、構
造物のねじれや回転運動あるいは船舶のローリングを防
止できるねじれ振動防止装置を安価に提供することを目
的としている。It is an object of the present invention to solve the problems of the prior art as described above, and to provide an inexpensive torsional vibration prevention device that can prevent torsional and rotational movements of structures and rolling of ships.
［課題を解決するための手段］
この発明に係わるねじれ振動防止装置は、構造物上に支
持された支点を中心として、回動自在に支持された桿と
、前記桿の両側に固定された重錘と、前記桿と構造物を
連結するばね及び減衰器とを有してなるねじれ振動防止
装置であり、前記重錘の桿上の位置が、可変であるねじ
れ振動防止装置である。[Means for Solving the Problems] A torsional vibration prevention device according to the present invention includes a rod supported rotatably around a fulcrum supported on a structure, and a weight fixed on both sides of the rod. This torsional vibration prevention device includes a weight, a spring and a damper that connect the rod and a structure, and the position of the weight on the rod is variable.
［作用コ
本発明のねじれ振動防止装置を取付けた構造物にねじれ
振動が発生すると、その振動は構造物からねじれ振動防
止装置を収付けた架台、回転主軸を介して上梓に伝えら
れるが、上梓および構造物のねじれ振動は、油圧ダンパ
ーあるいは粘弾性体等で構成した減衰器に吸収されて、
構造物のねじれ振動を急速に減衰させる。[Operation] When torsional vibration occurs in a structure to which the torsional vibration prevention device of the present invention is installed, the vibration is transmitted from the structure to the upper part of the building via the pedestal in which the torsional vibration prevention equipment is installed and the rotating main shaft. The torsional vibration of the structure is absorbed by a damper composed of a hydraulic damper or a viscoelastic material, etc.
Rapidly damps torsional vibrations in structures.
［実施例］
本発明の１実施例を、第１図および第２図により説明す
る。第１図は、本発明の一実施例のねじれ振動防止装置
であり、第１図（ａ）はその側面図、第１図（ｂ）はそ
の平面図である。このねじれ振動防止装置は、構造物の
回転中心に設置された架台１上の軸受２に回動自在に支
承された回転主軸３と、この回転主軸３に固着され、回
転主軸３の回動にともない回転主軸３を中心として鉛直
方向く第１図では上下方向）に揺動する桿４と、桿４の
両側に固定された重錘５，５と、桿４と構造物に固着さ
れている架台１とを連結するばね６及び減衰器７から構
成されている。したがって第２図の矢印のような回転運
動が構造物に発生すると、この回転運動は架台１、回転
主軸３を介して桿４に伝えられ、桿４は回転主軸３を中
心として鉛直方向に揺動するが、その揺動のエネルギー
は粘弾性体等で構成された減衰器７により吸収されるの
で、構造物の回転運動は急速に減衰される。[Example] An example of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 shows a torsional vibration prevention device according to an embodiment of the present invention, FIG. 1(a) is a side view thereof, and FIG. 1(b) is a plan view thereof. This torsional vibration prevention device includes a rotating main shaft 3 rotatably supported by a bearing 2 on a frame 1 installed at the center of rotation of a structure, and a rotating main shaft 3 fixed to the rotating main shaft 3. A rod 4 that swings vertically (up and down in Fig. 1) about a rotating main shaft 3, weights 5, 5 fixed to both sides of the rod 4, and a rod 4 that is fixed to a structure. It is composed of a spring 6 and a damper 7 that connect to the pedestal 1. Therefore, when a rotational motion as shown by the arrow in FIG. However, since the energy of the oscillation is absorbed by the damper 7 made of a viscoelastic material or the like, the rotational motion of the structure is rapidly attenuated.
重錘５，５の桿４への取付は位置が、可変であるように
構成することもできる。このように構成しておくと、構
造物の固有振動数に応じて装置の固有振動数を変更する
ことができるので、より顕著な制振効果が期待できる。The attachment positions of the weights 5, 5 to the rod 4 can also be configured to be variable. With this configuration, the natural frequency of the device can be changed in accordance with the natural frequency of the structure, so a more significant vibration damping effect can be expected.
なお第１図および第２図では、鉛直方向の回転運動につ
いての例を示したが、水平方向の回転運動に対しても回
転主軸３が鉛直方向を向くように構造物に取付けること
により、適用できる。Although FIGS. 1 and 2 show an example of rotational movement in the vertical direction, it can also be applied to rotational movement in the horizontal direction by mounting it on a structure so that the rotational main shaft 3 faces in the vertical direction. can.
さらには、このねじれ振動防止装置の適用は、構造物や
船舶に限定されることはなく、機械等のねじれ振動防止
に対しても効果があるのはもちろんである。Furthermore, the application of this torsional vibration prevention device is not limited to structures and ships, and is of course effective in preventing torsional vibration of machines and the like.
［発明の効果］
本発明のねじれ振動防止装置は、構造物や船舶ひいては
機械等のねじれ振動の防止に顕著な効果があるとともに
、安価でコンパクトな装置を提供することができるので
、その工業的な効果は大きい。[Effects of the Invention] The torsional vibration prevention device of the present invention has a remarkable effect on preventing torsional vibration of structures, ships, and machines, etc., and can provide an inexpensive and compact device. The effect is huge.
第１図（ａ）は本発明の１実施例のねじれ振動防止装置
の側面図、第１図（ｂ）は本発明の１実施例のねじれ振
動防止装置の平面図、第２図はねじれ振動防止装置の作
動原理の説明図、第３図従来の水平振動防止装置の斜視
図、第４図（ａ）は従来の上下振動防止装置の側面図、
第４図（ｂ）は従来の上下振動防止装置の平面図である
。
１・・・架台、２・・・軸受、３・・・回転主軸、４・
・・桿、５．５・・・重錘、６・・・ばね、７・・・減
衰器、１１・・・支持フレーム、１２．１２・・・線ヒ
ンジ、１３．１３・・・長い形状の板、１４．１４・・
・重錘、１５・・・減衰器、２１．２１・・重錘、２２
・・・１桿、２３・・・フレーム、２４・・・主回転軸
、２５．２５・・・コイル捩バネ、２６・・・補助枠、
２７・・・上板、２８．２８・・台、
２９．２９・・軸受、３０・・・補助回転軸、３１・・
・粘弾性体。FIG. 1(a) is a side view of a torsional vibration preventing device according to an embodiment of the present invention, FIG. 1(b) is a plan view of a torsional vibration preventing device according to an embodiment of the present invention, and FIG. 2 is a side view of a torsional vibration preventing device according to an embodiment of the present invention. An explanatory diagram of the operating principle of the prevention device, Figure 3 is a perspective view of a conventional horizontal vibration prevention device, and Figure 4 (a) is a side view of a conventional vertical vibration prevention device.
FIG. 4(b) is a plan view of a conventional vertical vibration prevention device. 1... Frame, 2... Bearing, 3... Rotating main shaft, 4...
... Rod, 5.5 ... Weight, 6 ... Spring, 7 ... Attenuator, 11 ... Support frame, 12.12 ... Line hinge, 13.13 ... Long shape board, 14.14...
・Weight, 15...Attenuator, 21.21...Weight, 22
...1 rod, 23...frame, 24...main rotating shaft, 25.25...coil torsion spring, 26...auxiliary frame,
27...Top plate, 28.28...Base, 29.29...Bearing, 30...Auxiliary rotating shaft, 31...
・Viscoelastic body.
Claims (2)
在に支持された桿と、前記桿の両側に固定された重錘と
、前記桿と構造物を連結するばね及び減衰器とを有して
なるねじれ振動防止装置。(1) A rod rotatably supported around a fulcrum supported on a structure, a weight fixed to both sides of the rod, and a spring and damper that connect the rod and the structure. A torsional vibration prevention device comprising:
とする請求項１記載のねじれ振動防止装置。(2) The torsional vibration prevention device according to claim 1, wherein the position of the weight on the rod is variable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14952288A JPH01320346A (en) | 1988-06-17 | 1988-06-17 | Torsional vibration prevention device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14952288A JPH01320346A (en) | 1988-06-17 | 1988-06-17 | Torsional vibration prevention device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01320346A true JPH01320346A (en) | 1989-12-26 |
Family
ID=15476977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14952288A Pending JPH01320346A (en) | 1988-06-17 | 1988-06-17 | Torsional vibration prevention device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01320346A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006029851A1 (en) * | 2004-09-15 | 2006-03-23 | Tutech Innovation Gmbh | Device for damping vibrations in a building |
| CN112746683A (en) * | 2021-01-04 | 2021-05-04 | 中国矿业大学 | Threaded sleeve type stretching friction energy dissipater and using method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS622031A (en) * | 1985-06-25 | 1987-01-08 | Nippon Kokan Kk <Nkk> | Cantilever type dynamic vibration damper |
| JPS62251543A (en) * | 1986-04-23 | 1987-11-02 | Hitachi Zosen Corp | Balance type vibration absorber |
-
1988
- 1988-06-17 JP JP14952288A patent/JPH01320346A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS622031A (en) * | 1985-06-25 | 1987-01-08 | Nippon Kokan Kk <Nkk> | Cantilever type dynamic vibration damper |
| JPS62251543A (en) * | 1986-04-23 | 1987-11-02 | Hitachi Zosen Corp | Balance type vibration absorber |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006029851A1 (en) * | 2004-09-15 | 2006-03-23 | Tutech Innovation Gmbh | Device for damping vibrations in a building |
| CN112746683A (en) * | 2021-01-04 | 2021-05-04 | 中国矿业大学 | Threaded sleeve type stretching friction energy dissipater and using method thereof |
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