【発明の詳細な説明】本発明は煙突、マスト、橋梁部材等の柱状構造体の防振
装置に係るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vibration isolating device for columnar structures such as chimneys, masts, and bridge members.
従来のこの種の防振装置においてｔ土、円柱構造体＋１
１の外周面に帯状板よりなる防振帯（２）をその板面が
円柱構造体（１）の表面に垂直になるように螺旋状に捲
装して構成されている。In conventional vibration isolators of this type, t soil, cylindrical structure +1
A vibration isolation band (2) made of a band-shaped plate is wound spirally around the outer peripheral surface of the columnar structure (1) so that the plate surface is perpendicular to the surface of the columnar structure (1).
第６図に示すように円柱構造体（１］の表面に防振帯（
２）が配設されていない場合、第４図に示すようにカル
マン渦（３）は円柱構造体（１）の各断面でほぼ一様に
発生するので円柱構造体（１）全体九作用する渦動振力
は非常に太きいが、第５図に示すように円柱構造体（１
）に防振帯（２）を取付けると、カルマン渦（３）の発
生形態が各断面で異なるので、円柱構造体１１１全体に
作用する渦動振力は小さくなり、防振作用が発揮される
ものと考えられる。As shown in Figure 6, the vibration isolation band (
2) is not provided, the Karman vortex (3) is generated almost uniformly in each cross section of the cylindrical structure (1) as shown in Figure 4, so it acts on the entire cylindrical structure (1). The vortex vibration force is very strong, but as shown in Fig.
), the generation form of the Karman vortex (3) differs in each cross section, so the vortex vibration force acting on the entire columnar structure 111 becomes smaller and the vibration isolation effect is exerted. it is conceivable that.
しかしながらこの場合、防振帯（２）はその板面が円柱
構造体（１）の表面に垂直になるように配設されている
ので、受圧面積が増大するため、流体抵抗が円柱構造体
Ｔｌ）だけの場合に比して大幅に増加する。However, in this case, the vibration isolation band (2) is arranged so that its plate surface is perpendicular to the surface of the cylindrical structure (1), so the pressure receiving area increases, so that the fluid resistance is increased by the cylindrical structure Tl. ) increases significantly compared to the case where only
本発明はこのような実情に鑑みて提案されたもので、柱
状構造体の表面から間隔を存して、１枚乃至は複数の帯
状板を、同帯状板の板面を前記柱状構造体の表面に平行
にして螺旋状に捲回してなることな特徴とする柱状構造
体の防振装置に係り、その目的とする処は、流体抵抗を
殆んど増加することなくカルマン渦による撮動を効果的
に抑止しうる改良された柱状構造体の防振装置を供する
点にある。The present invention has been proposed in view of the above circumstances, and includes one or more strip plates arranged at a distance from the surface of the columnar structure so that the plate surface of the strip plate is placed at a distance from the surface of the columnar structure. This is a vibration isolator for a columnar structure that is characterized by being wound spirally parallel to the surface, and its purpose is to achieve imaging by Karman vortex without increasing fluid resistance. An object of the present invention is to provide an improved vibration isolating device for a columnar structure that can effectively suppress vibrations.
本発明においては前記したように柱状構造体の外周に、
表面から間隔を存して１枚乃至複数の帯成板を、その板
面が柱状構造体の表面に平行するように螺旋状に捲回し
たので、空気流は柱状構造体の表面に沿って流れ、空気
流の剥離点は帯状板の捲回されていない場合に比してか
なり下流側に移動するため、カルマン渦の大きさが小さ
くなり励振力が弱まる。しかも前記帯状板は螺旋状に捲
回されているので、柱状構造体の各断面でカルマン渦の
発生位置、大きさ、位相等が異なるので、柱状構造体全
体に作用する励振力は一層弱まり、防振効果が著しく向
上されるものである。In the present invention, as described above, on the outer periphery of the columnar structure,
One or more strip plates are wound spirally at intervals from the surface so that the plate surfaces are parallel to the surface of the columnar structure, so the airflow flows along the surface of the columnar structure. The separation point of the flow and airflow moves considerably downstream compared to when the strip plate is not wound, so the size of the Karman vortex becomes smaller and the excitation force becomes weaker. Moreover, since the strip plate is wound in a spiral, the position, size, phase, etc. of Karman vortices differ in each cross section of the columnar structure, so the excitation force acting on the entire columnar structure is further weakened. The anti-vibration effect is significantly improved.
しかも本発明においては前記帯状板はその板面が円柱構
造体の表面と平行しているので、帯状板は空気流にほぼ
平行して位置し、従って、同帯状板による流体抵抗の増
加は殆んどない。Moreover, in the present invention, since the plate surface of the strip plate is parallel to the surface of the cylindrical structure, the strip plate is positioned almost parallel to the airflow, and therefore the increase in fluid resistance due to the strip plate is almost negligible. It's not easy.
以下本発明を図示の実施例について説明する。The present invention will be described below with reference to the illustrated embodiments.
第７図及び第８図において（１１）は円柱構造体で、そ
の外周面に６枚の帯′成板（岱が、その板面が円柱構造
体（１１）の表面と適当な間隔をへだてて、同面と平行
するように螺旋状に倒置されている。In Figures 7 and 8, (11) is a cylindrical structure, and on its outer circumferential surface there are six banded plates (diameters), the plate surfaces of which are separated from the surface of the cylindrical structure (11) by an appropriate distance. It is inverted spirally so that it is parallel to the same plane.
第９図に示すように帯状板がなく円柱構造体αυだけの
場合、空気流は円柱構造体（１１）表面のＡ点で剥離し
、その下流にカルマン渦０（９）が発生するが、前記実
施例によれば第１０図に示すように、帯状板（１２１が
円柱構造体（１１）の表面に平行に取付けられているの
で、空気流は円柱構造体表面に沿って流れ一剥離点はＢ
、０点に示すようにＡ点に比してかなり下流側に移動す
る。As shown in Fig. 9, when there is no strip plate and only the cylindrical structure αυ, the air flow separates at point A on the surface of the cylindrical structure (11), and a Karman vortex 0 (9) is generated downstream of it. According to the embodiment, as shown in FIG. 10, since the strip plate (121) is attached parallel to the surface of the cylindrical structure (11), the airflow flows along the surface of the cylindrical structure and reaches a separation point. is B
, as shown at point 0, moves considerably downstream compared to point A.
このように剥離点が下流に移動すると、カルマン渦（１
りの大きさは小さくなり、励振力は弱まる。When the separation point moves downstream in this way, a Karman vortex (1
The magnitude of the increase decreases, and the excitation force weakens.
更に前記帯状板代２は円柱構造体（１１）に螺旋状に捲
回されているので、同円柱構造体（ＩＩ）の各断面でカ
ルマン渦の発生位置、大きさ、位相等が異なるので、円
柱構造体０１）全体に作用する励振力は一層弱まる。Furthermore, since the band-shaped plate allowance 2 is spirally wound around the cylindrical structure (11), the generation position, size, phase, etc. of the Karman vortex differ in each cross section of the cylindrical structure (II). The excitation force acting on the entire cylindrical structure 01) is further weakened.
また帯状板ａ３の板面が円柱構造体（１１）の表面に平
行していて、帯状板（１２）は空気流にほぼ平行してい
るので、帯状板α２の設置による流体抵抗の増加は殆ん
どない。Furthermore, since the plate surface of the strip plate a3 is parallel to the surface of the columnar structure (11), and the strip plate (12) is almost parallel to the air flow, the increase in fluid resistance due to the installation of the strip plate α2 is almost negligible. It's not easy.
前記実施例の防振効果を確認するため、第１１図に示す
よ５に円柱構造体＋１１の上下なばね（＋４１によって
支持し、側面から矢印に示すように風をあてて前記構造
体の振動を調査する風洞実験を行った。In order to confirm the vibration-proofing effect of the above embodiment, as shown in FIG. We conducted wind tunnel experiments to investigate.
なお実験に供せられた模型は単なる円柱（第１２図参照
）と、第１図及び第２図に７Ｊ＜す如き従来のもの（第
１６図参照）、及び第７図及び第８図に示す如き本発明
の実施例（第１４図参照）の３２ｉＪ類で、寸法（単位
間）は図示のとおりで、模型の重量は約４．５ Ｋｙ、
固有振動数は約４．８Ｈｚ、構造減衰（対数減衰等）は
約０．０１２である。The models used in the experiment were a simple cylinder (see Figure 12), a conventional model such as 7J< shown in Figures 1 and 2 (see Figure 16), and a cylindrical model shown in Figures 7 and 8. The model is of the 32iJ type according to the embodiment of the present invention as shown (see Fig. 14), the dimensions (between units) are as shown, and the weight of the model is about 4.5 Ky.
The natural frequency is about 4.8 Hz, and the structural damping (logarithmic damping, etc.) is about 0.012.
第１５図は風洞実験結果を示し、点線αは第１２図に示
すただの円柱を、一点鎖線すは第１６図に示す従来の帯
状板付き円柱構造体を、実線Ｃは第１４図に示す本発明
の実施例の実％’＋、ｉ結果を示し、本発明の実施例に
おける振動振幅はただの円柱の場合の約１／であり、従
来の帯状板伺き円柱構造体の約２である。なお本発明の
実施例は前記従来の帯状板付き円柱構造体のように流体
抵抗が大幅に増加することはなく、単なる円柱と殆んど
変らないことは前述したとおりである。Figure 15 shows the results of wind tunnel experiments, where the dotted line α represents the simple cylinder shown in Figure 12, the dashed line represents the conventional cylindrical structure with a strip plate shown in Figure 16, and the solid line C represents the cylinder structure shown in Figure 14. The actual results of the embodiment of the present invention are shown, and the vibration amplitude in the embodiment of the present invention is about 1/of that of a simple cylinder, and about 2 of that of a conventional cylindrical structure with strip plates. be. As mentioned above, the embodiment of the present invention does not have a large increase in fluid resistance unlike the conventional columnar structure with strip plates, and is almost the same as a simple column.
第１６図乃至第２１図は夫々円柱構造体（Ｉｌｌに１条
乃至６条の帯状板（１２１を螺旋状に捲回した本発明の
各実施例を示し、第２２図乃至第２７図は夫々楕円柱構
造体（１１勺に１栄乃至６条の帯状板（１２＋を捲回し
た本発明の各実施例を示すもので、本発明はその他角柱
状構造体にも適用できる。16 to 21 respectively show embodiments of the present invention in which one to six strip plates (121) are spirally wound around a cylindrical structure (Ill), and FIGS. 22 to 27 respectively The embodiments of the present invention are shown in which an elliptical cylindrical structure (11 to 6 band plates (12+) are wound), and the present invention can also be applied to other prismatic structures.
以上本発明を実施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だ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
うるものである。Although the present invention has been described above with reference to embodiments, the present invention is, of course, not limited to such embodiments, and can be modified in various ways without departing from the spirit of the present invention. .
第１図は従来の柱状構造体の防振装置の正面図、第２図
は第１図の矢視■−■図、第６図は円柱構造体の正面図
、第４Ａ図、第４Ｂ図及び第４Ｃ図は夫々第６図のα−
α線、ｂ−ｂ線、ｃ−ｃ線に沿って截断した横断面にお
けるカルマン渦発生状況を示す説明図、第５図は前記従
来の防振装置を具えた柱状構造体の正面図、第６Ａ図、
第６Ｂ図及び第６Ｃ図は夫々第５図のａ−α線、ｈ−ｈ
線及びｃ−ｃ線に沿って截断した横断面におけるカルマ
ン渦発生状況を示す説明図、第７図は本発明に係る柱状
構造体の防振装置の一実施例を示す正面図、第８図はそ
の横断平面図、第９図及び第１０図は夫々巴柱並に本発
明の前記実施例におけるカルマン渦の発生状況を示す平
面図、第１１図は柱状構造体の防振性能の実験装置、第
１２図乃至第１４図は夫々同実験装置の各種供試体の正
面図、第１５図は実験結果を示す図表、第１６図乃至第
２７図は夫々本発明の他の実施例を示す横断平面図であ
る。旧）・・・円柱構造体、（１１’） ・・・楕円柱構
造体、０２）・・・帯状板第１図第３図第４Ａ図 第４Ｂ図 第４Ｃ図第５図図 第６Ｂ図 第６Ｇ図第７図第９図 第１０図第１１図第１６図 第１７図／２−ｒ＝二／２第１８図−／２第２４図／／￥２７図Fig. 1 is a front view of a conventional vibration isolator for a columnar structure, Fig. 2 is a view taken along arrows - - - in Fig. 1, Fig. 6 is a front view of a columnar structure, Figs. 4A and 4B. and FIG. 4C are α- in FIG. 6, respectively.
An explanatory diagram showing the Karman vortex generation situation in a cross section cut along the α line, the bb line, and the cc line. Figure 6A,
Figures 6B and 6C are the a-α line and h-h line of Figure 5, respectively.
FIG. 7 is a front view showing an embodiment of the vibration isolating device for a columnar structure according to the present invention; FIG. 9 and 10 are plan views showing the occurrence of Karman vortices in the Tomoe column and the embodiment of the present invention, respectively. FIG. 11 is an experimental setup for the vibration isolation performance of the columnar structure. , FIGS. 12 to 14 are front views of various specimens of the same experimental apparatus, FIG. 15 is a chart showing the experimental results, and FIGS. 16 to 27 are cross-sectional views showing other embodiments of the present invention, respectively. FIG. Old)...Cylindrical structure, (11')...Oval columnar structure, 02)...Strip plate Fig. 1 Fig. 3 Fig. 4A Fig. 4B Fig. 4C Fig. 5 Fig. 6B Figure 6G Figure 7 Figure 9 Figure 10 Figure 11 Figure 16 Figure 17 /2-r = 2/2 Figure 18- /2 Figure 24 // Figure ¥27
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP45183AJPS59126875A (en) | 1983-01-07 | 1983-01-07 | Vibration dampening apparatus of columnar structure |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP45183AJPS59126875A (en) | 1983-01-07 | 1983-01-07 | Vibration dampening apparatus of columnar structure |
| Publication Number | Publication Date |
|---|---|
| JPS59126875Atrue JPS59126875A (en) | 1984-07-21 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP45183APendingJPS59126875A (en) | 1983-01-07 | 1983-01-07 | Vibration dampening apparatus of columnar structure |
| Country | Link |
|---|---|
| JP (1) | JPS59126875A (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61221470A (en)* | 1985-03-27 | 1986-10-01 | 日本電信電話株式会社 | Strake for corner cross-section having circular arc corner angle |
| JPS63133658U (en)* | 1987-02-25 | 1988-09-01 | ||
| US9655360B2 (en) | 2004-01-23 | 2017-05-23 | Eden Research Plc | Nematicidal compositions and methods of using them |
| US10258033B2 (en) | 2005-11-30 | 2019-04-16 | Eden Research Plc | Compositions and methods comprising terpenes or terpene mixtures selected from thymol, eugenol, geraniol, citral and L-carvone |
| JP2020007844A (en)* | 2018-07-11 | 2020-01-16 | 清水建設株式会社 | building |
| US10638750B2 (en) | 2004-05-20 | 2020-05-05 | Eden Research Plc | Compositions containing a hollow glucan particle or a cell wall particle encapsulating a terpene component, methods of making and using them |
| US10667512B2 (en) | 2005-11-30 | 2020-06-02 | Eden Research Plc | Terpene-containing compositions and methods of making and using them |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61221470A (en)* | 1985-03-27 | 1986-10-01 | 日本電信電話株式会社 | Strake for corner cross-section having circular arc corner angle |
| JPS63133658U (en)* | 1987-02-25 | 1988-09-01 | ||
| US9655360B2 (en) | 2004-01-23 | 2017-05-23 | Eden Research Plc | Nematicidal compositions and methods of using them |
| US10638750B2 (en) | 2004-05-20 | 2020-05-05 | Eden Research Plc | Compositions containing a hollow glucan particle or a cell wall particle encapsulating a terpene component, methods of making and using them |
| US10258033B2 (en) | 2005-11-30 | 2019-04-16 | Eden Research Plc | Compositions and methods comprising terpenes or terpene mixtures selected from thymol, eugenol, geraniol, citral and L-carvone |
| US10667512B2 (en) | 2005-11-30 | 2020-06-02 | Eden Research Plc | Terpene-containing compositions and methods of making and using them |
| JP2020007844A (en)* | 2018-07-11 | 2020-01-16 | 清水建設株式会社 | building |
| Publication | Publication Date | Title |
|---|---|---|
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