JPS61146975A - Vibration dumping structure of cylindrical member - Google Patents
Vibration dumping structure of cylindrical memberInfo
- Publication number
- JPS61146975A JPS61146975A JP26865084A JP26865084A JPS61146975A JP S61146975 A JPS61146975 A JP S61146975A JP 26865084 A JP26865084 A JP 26865084A JP 26865084 A JP26865084 A JP 26865084A JP S61146975 A JPS61146975 A JP S61146975A
- Authority
- JP
- Japan
- Prior art keywords
- cylindrical member
- cylindrical
- vibration
- wind
- present
- 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
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）
本発明は鉄塔型煙突、各種鉄塔等の構造物、或いは各種
プラントにおけるダクト等における円筒部材の制振構造
に係るものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a vibration damping structure for cylindrical members in structures such as steel tower chimneys, various steel towers, or ducts in various plants.
（従来の技術）
第５図及び第６図は夫々鉄骨梠造において円筒部材が利
用されモいる例を示し、第５図においては鉄骨構造（１
）の筋違材（２）、及び張出部（３）の固定材（４）と
して円筒部材が使用されておシ、また第６図においては
ダクト（５）の内側の断面補強材（６）として円筒部材
が使用されている。(Prior art) Fig. 5 and Fig. 6 show examples in which cylindrical members are used in steel frame structure, respectively.
) and as the fixing material (4) of the overhang (3). ) is used as a cylindrical member.
このような円筒部材に空気、蒸気、その他各種の気体の
流れ（以下風αと総称する）が当ると、第７図に示すよ
うに流体の流れが円筒部材−の表面から剥離することに
よって同部材（４）の風下側には規則的にカルマン渦列
すが形成される。而してこのカルマン渦の発生によシ、
円筒部材−には円筒断面を風向と直角方向へ動かす規則
的な変動揚力Ｆが作用する。When a flow of air, steam, or various other gases (hereinafter collectively referred to as wind α) hits such a cylindrical member, the flow of fluid separates from the surface of the cylindrical member, as shown in Figure 7, and the same occurs. Karman vortex arrays are regularly formed on the leeward side of the member (4). Therefore, due to the generation of this Karman vortex,
A regular fluctuating lift force F that moves the cylindrical cross section in a direction perpendicular to the wind direction acts on the cylindrical member.
この変動揚力の珈動数をｆよとし、円筒部材−の固有振
動数をｆ２とすると、ｆｌとｆ２ とが一致、或いは近
接している場合、円筒部材（Ａ）は共振状態となシ、第
５図及び第６図のＣで例示する振動を生起する。If the frequency of this fluctuating lift is f and the natural frequency of the cylindrical member is f2, then if fl and f2 match or are close to each other, the cylindrical member (A) will not be in a resonant state. The vibration illustrated by C in FIGS. 5 and 6 is generated.
従来このような渦動振動に対しては第８図に示すように
、円筒聞く材の中間に重量物（７）を取伺けて同部材の
固有振動数を変えるか、第８図及び第９図に示すように
、新らたに補強部材（８）を追加するという対策が講じ
られていた。Conventionally, in order to deal with such vortex vibrations, as shown in Fig. 8, a heavy object (7) was inserted between the cylindrical members to change the natural frequency of the member, or As shown in the figure, a new measure was taken to add a reinforcing member (8).
（発明が解決しようとする問題点）
しかしながら前記従来の制振構造は施工に手間がかかる
上に、風向の異なる風に対して同様な渦動振動を生起す
るという問題点がめった。(Problems to be Solved by the Invention) However, the conventional vibration damping structure requires a lot of time and effort to construct, and also frequently suffers from the problem that similar vortex vibrations occur in response to winds of different directions.
（問題点を解決するだめの手段）
本発明はこのような問題点を解決するために提案された
ものであって、円筒部材の全長、或いは部材中間部に、
部材軸］！！シに整流翼を回転自在に取付けてなること
を特許とする円筒部材の制振構造に係るものである。(Means for Solving the Problems) The present invention was proposed to solve the above problems, and includes the following:
Member axis]! ! This patent relates to a vibration damping structure for a cylindrical member in which a rectifying blade is rotatably attached to the shaft.
（作用）
本発明においては前記したように、円筒部材の全長、或
いは部材中間部に、整流翼が部材軸廻シに回転自在に取
付けられているので、円筒部材に風が当ると前記整流翼
は風下側になびき、その結果、整流翼のｍｂの風の流れ
が滑らかになり、カルマン渦の発生が抑制され、円筒部
材の渦動振動が防止される。(Function) As described above, in the present invention, the straightening blades are attached to the entire length of the cylindrical member or at the middle part of the member so as to be rotatable around the member axis, so when the wind hits the cylindrical member, the straightening blades flutters to the leeward side, and as a result, the flow of the wind through the straightening blade mb becomes smooth, the generation of Karman vortices is suppressed, and the vortex vibration of the cylindrical member is prevented.
（発明の効果）
本発明においては前記したように整流翼が円筒部材に固
定されることなく、同部材廻シに回転自在に取付けられ
ているので、風向きの如何にかかわらず、整流翼が風下
になびき、振動の原因になるカルモル渦の発生を常に抑
止しつるものであシ、また前記整流翼は既設の円筒部材
にも取付けることができ、施工も容易でコストも低廉で
ある。(Effect of the invention) In the present invention, as described above, the rectifier blades are not fixed to the cylindrical member but are rotatably attached to the cylindrical member, so regardless of the wind direction, the rectifier blades are It always suppresses the generation of Kalmol vortices that cause fluttering and vibration, and the baffle blades can also be attached to existing cylindrical members, making construction easy and inexpensive.
（実施例） 以下本発明を図示の実施例について訣１明する。(Example) The present invention will now be explained in detail with reference to the illustrated embodiments.
■は円筒部材で、流線形の整流ｘａ２Ｉが回転自在に装
着されるとともに、ストッパＣ１３によって整流翼（１
２＋の円筒部材（１１）の材軸方向への移動全抑止ブる
ように構成されている。■ is a cylindrical member on which the streamlined rectifier xa2I is rotatably mounted, and the rectifier blade (1
The structure is such that the movement of the 2+ cylindrical member (11) in the material axis direction is completely inhibited.
なお前記整流翼α２は第３図に示すように円筒部材（１
１）の全長に亘って配設されてもよく、或いは部材中間
部に複数個連続して、または間隔を存して配設されても
よい。Note that the straightening blade α2 is a cylindrical member (1) as shown in FIG.
They may be disposed over the entire length of 1), or a plurality of them may be disposed in succession or at intervals in the middle of the member.
図示の実施例は前記したように構成されているので、第
２図に示すように整流翼（１２１が装着された円筒部材
αυに風のが当ると、整流翼（１２＋は破線で示すよう
に風下側になびく。その結果整流翼ａりの廻シの風の流
れはｄに示すようになめらかになシ、振動の原因となる
カルマン渦の発生が抑制される。Since the illustrated embodiment is configured as described above, when the wind hits the cylindrical member αυ on which the rectifying blade (121) is attached as shown in FIG. As a result, the wind flow around the rectifier blade a becomes smooth as shown in d, and the generation of Karman vortices that cause vibrations is suppressed.
このように図示の実施例によれば、風向の如何によらず
円筒部材ａυに装着された整流Ｒａ２か風下になびき、
カルマン渦の発生を抑えることによって円筒部材（１２
＋の渦動振動を抑制することができる。According to the illustrated embodiment, the rectifier Ra2 attached to the cylindrical member aυ flows downwind regardless of the wind direction.
By suppressing the generation of Karman vortices, the cylindrical member (12
+ vortex vibration can be suppressed.
また既設の円筒部材αυに風による振動が発生した後で
も、これに整流翼ｕ”ｔ−取付けることによって振動を
抑制することができ、施工が簡単で、コストも低廉で済
む。Furthermore, even after vibrations occur in the existing cylindrical member αυ due to the wind, the vibrations can be suppressed by attaching the rectifying blades u″t to the existing cylindrical member αυ, and the construction is simple and the cost is low.
以上本発明を実軸例について説明したが、本発明は勿論
このような実施例にたけ局限されるものではなく、本発
明の精神を逸脱しない範囲内で種々の設計の改変を施し
うるものでるる。Although the present invention has been described above with reference to a practical example, the present invention is of course not limited to such an embodiment, and various design changes can be made without departing from the spirit of the present invention. Ruru.
第１図は本発明に係る円筒部材の制振装置の一実施例を
示す斜面図、第２図はその作用説明図、第３図及び第４
図は夫々本発明に係る円筒部材の各実施例を示す正面図
、第５図及び第６図は夫々円筒部材の使用例を示す斜面
図、第７図は円筒部材に風が当った場合の作用説明図、
第８図及び第９図は夫々従来の円筒部材の制振構造を示
す斜面図である。
αυ・・・円筒部材、α鎮・・整流翼
第８図
第ｑ図FIG. 1 is a perspective view showing an embodiment of the vibration damping device for a cylindrical member according to the present invention, FIG. 2 is an explanatory diagram of its operation, and FIGS. 3 and 4.
The figures are front views showing respective embodiments of the cylindrical member according to the present invention, Figs. 5 and 6 are perspective views showing examples of how the cylindrical member is used, and Fig. 7 is a view of the case where the cylindrical member is exposed to wind. Action diagram,
FIGS. 8 and 9 are perspective views showing conventional vibration damping structures for cylindrical members, respectively. αυ...Cylindrical member, αυ...Brighter blade Figure 8, Figure q
Claims (1)
流翼を回転自在に取付けてなることを特徴とする円筒部
材の制振構造。A vibration damping structure for a cylindrical member, characterized in that a rectifying blade is rotatably attached around the axis of the cylindrical member over the entire length of the cylindrical member or at the middle of the member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26865084A JPS61146975A (en) | 1984-12-21 | 1984-12-21 | Vibration dumping structure of cylindrical member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26865084A JPS61146975A (en) | 1984-12-21 | 1984-12-21 | Vibration dumping structure of cylindrical member |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61146975A true JPS61146975A (en) | 1986-07-04 |
Family
ID=17461492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26865084A Pending JPS61146975A (en) | 1984-12-21 | 1984-12-21 | Vibration dumping structure of cylindrical member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61146975A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002021919A (en) * | 2000-07-06 | 2002-01-23 | Sumitomo Rubber Ind Ltd | Vibration damping device |
-
1984
- 1984-12-21 JP JP26865084A patent/JPS61146975A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002021919A (en) * | 2000-07-06 | 2002-01-23 | Sumitomo Rubber Ind Ltd | Vibration damping device |
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