EP0686733B2 - Schwingungsdämpfer für schwingungsgefährdete Bauteile und Bauwerke - Google Patents
Schwingungsdämpfer für schwingungsgefährdete Bauteile und Bauwerke Download PDFInfo
- Publication number
- EP0686733B2 EP0686733B2 EP95105685A EP95105685A EP0686733B2 EP 0686733 B2 EP0686733 B2 EP 0686733B2 EP 95105685 A EP95105685 A EP 95105685A EP 95105685 A EP95105685 A EP 95105685A EP 0686733 B2 EP0686733 B2 EP 0686733B2
- Authority
- EP
- European Patent Office
- Prior art keywords
- tank
- vibration
- vibration absorber
- tanks
- liquid surface
- 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 - Lifetime
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
- E04H9/0215—Bearing, supporting or connecting constructions specially adapted for such buildings involving active or passive dynamic mass damping systems
Definitions
- the invention relates to a vibration damper for components and structures at risk of vibration, preferably chimneys, masts, antenna structures and industrial containers with a quasi-rotalion symmetrical Vibration behavior, from at least a container filled with a liquid, the Mass, sloshing frequency and self-damping behavior to a natural frequency of the vibration-prone structure are coordinated.
- vibration dampers belonging to the category include the dynamic vibration damper.
- Such vibration dampers consist of a arranged to vibrate on the main mass of the structure Additional mass via an attenuator is connected to the main mass.
- the embodiments distinguish this dynamic vibration damper very different from each other.
- the spring and damper properties the one vibrating with the structure Liquid is used to create a damper effect exploited, the mass, the sloshing frequency and the self-damping behavior of the liquid a natural frequency of the vibration-prone to be damped Building can be coordinated.
- Such a vibration damper at the beginning described is from US-A-4 951 441 known. It uses at least one rectangular one Container, the frequency tuning of the in the container liquid in the direction of the longer side of the container he follows. Such vibration dampers are effective only in one direction of vibration. Should slim structures with a quasi-rotationally symmetrical Vibration behavior, such as Steamed chimneys, masts and antenna structures is a variety of such rectangular containers with a correspondingly diverse orientation required, with which the design effort and the space requirement enlarge so that the known vibration damper for particularly slim structures can no longer be used.
- the invention has for its object to develop vibration damper of the type described in such a way that a structurally simple and effective and easy to adapt to the individual case results in vibration damper that can be used for slim components and structures.
- Vibration damper created, its damping effect in all horizontal directions of vibration of the component or building in the same way and only because the liquid mass in the container occurs, so that an extremely small design and results in a correspondingly low weight of the damper, with which in particular its use in the chimney and Antenna construction becomes possible.
- the container according to the invention with circular Container base or formed as an annular container be the by approximately radially extending partitions is divided.
- the container can according to one another feature of the invention but also with a by an equilateral triangle, a square or a Polygon with the same long sides of the container base be trained.
- These quasi-radial-symmetrical Containers become the reflection properties exploited the liquid wave. Arise in this case perpendicular to the wall outgoing wave fronts that extend along the bisector cross the neighboring container walls, so that a damping effect in this case too in the respective direction of vibration.
- a preferred one Implementation of the invention will be such Containers with their diagonals in the main vibration direction of the component or structure.
- the level of the liquid in the Containers smaller than the distance of each liquid surface delimiting container wall from the center the liquid surface, preferably be less than half this distance. hereby is achieved that almost the entire mass of Liquid to dampen vibrations is used and the components to be damped or structures not unnecessarily loaded with additional weights become.
- the side walls of the container according to the invention can either be perpendicular to the container base run; but they can also slant inwards be inclined to when hitting the vibrations emerging waves a reflection of this To cause waves towards the bottom of the container.
- FIG. 1 to 3 show a container with a square Base area G, from which the container walls W extend vertically upwards.
- the container height H is indicated to the right of the container in Fig. 1.
- the container is filled with a liquid F, the Level h is also shown in Fig. 1; it is significant smaller than the container height H. Also the liquid surface O is shown in Fig. 1.
- Fig. 2 is the center M of the liquid surface O to recognize. From this center M has each container wall delimiting the liquid surface O W on the in the plane of the liquid surface O extending perpendicular (i.e. the vertical to section line S of the plane of the liquid surface O with the corresponding container wall W) same distance A. These distances A are in the Top view drawn in Fig. 2.
- the second embodiment according to the 5 and 6 is also with a square Base designed containers with container walls W, which are inclined obliquely inwards.
- the distance A results in each Liquid surface O delimiting container wall W between the center M of the liquid surface O and that in the plane of the liquid surface O perpendicular bisector of section line S of Level of the liquid surface O with the corresponding one Container wall W.
- each the container wall delimiting the liquid surface O W from the center M of the liquid surface O is approximately the same size, there is a quasi-rotationally symmetrical Vibration behavior of the liquid F.
- Fig. 4 it is shown that there is a container with a square base G between each opposite container walls W extending Form shafts a and b when the container is in swings diagonally. This direction of vibration is indicated with a double arrow in Fig. 4.
- the waves running to the opposite wall a and b intersect in the area of the bisector between the neighboring ones, each the wave a or b initiating container walls W. It results itself with the square despite the design of the container Base area G is a quasi-rotationally symmetrical Vibration behavior because of the interference which causes waves a and b to be more damped than with an arrangement of the container with parallel or perpendicular to the main vibration direction aligned container walls W.
- a slim structure B as a section of a circular cylindrical tube shown. It can be this around a chimney, a mast, an antenna structure, an industrial container or other structure or component, its height in relation to its footprint is very large and that is at risk of vibration is.
- the cross section of the slim Building B need not be circular; this Cross-sectional shape was only on the drawings chosen because of the better representation.
- Such slim structures B are particularly vulnerable dynamic, i.e. unsteady wind loads.
- This pipe represents, for example the outside support pipe of a chimney is provided with an exhaust pipe inner tube I.
- an insulation i carries and is provided with a cover C, which the Annulus between insulation i and outer support tube B covers.
- 14 and 15 is the total mass as the vibration damping Additional mass liquid F distributed to the sub-containers because of their small dimensions and low filling level a high one Sloshing frequency, so that there is a high damping effect with negligibly small dead resonating Mass results.
- the self-damping behavior the individual container does not just depend on it absolute size, the mass of the liquid F and the respective liquid level, but also from their Position from the direction of vibration. Through a variation this parameter, especially the size and shape of the individual containers and the type and amount of liquid F these vibration dampers can be particularly special effective way in at least one to be damped Adjust the natural frequency of the slim building B.
- 16 is in the embodiment a plurality of circular cylindrical containers ring-shaped on the outside of the slim structure B symbolizing circular cylindrical tube arranged.
- different liquid fillings can be used a different damping effect in different directions of vibration of the Building B can be reached.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Vibration Prevention Devices (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Description
- Fig. 1
- einen senkrechten Schnitt durch einen Behälter,
- Fig. 2
- eine Draufsicht auf den Behälter nach Fig. 1,
- Fig. 3
- einen der Fig. 1 entsprechenden Schnitt mit Darstellung der sich bei Schwingung ausbildenden Welle,
- Fig. 4
- eine Draufsicht auf einen entsprechenden quadratischen Behälter bei einer Schwingung in diagonaler Richtung,
- Fig. 5
- einen senkrechten Schnitt entsprechend der Fig. 1 durch eine Ausführungsform eines Behälters mit quadratischer Grundfläche, jedoch nach innen geneigten Wänden,
- Fig. 6
- eine Draufsicht auf den Behälter nach Fig. 5,
- Fig. 7
- eine der Fig. 3 entsprechende Darstellung des Behälters nach den Fig. 5 und 6 unter Darstellung der sich bei Schwingungen ausbildenden Welle,
- Fig. 8
- eine Draufsicht auf eine weitere Ausführungsform eines Behälters mit dreieckiger Grundfläche,
- Fig. 9
- eine Draufsicht auf einen Behälter mit kreisförmiger Grundfläche,
- Fig. 10
- eine Draufsicht auf einen Behälter mit sechseckiger Grundfläche,
- Fig. 11
- eine perspektivische Ansicht eines ringförmigen, auf der Außenfläche eines kreiszylindrischen Bauwerkes angeordneten Behälters, der durch radiale Trennwände in Einzelbehälter unterteilt ist,
- Fig. 12
- eine Draufsicht auf die Behälter nach Fig. 11,
- Fig. 13
- eine Draufsicht auf einen der durch radiale Trennwände innerhalb eines ringförmigen Behälters gebildeten Behälter gemäß den Fig. 11 und 12,
- Fig. 14
- eine Seitenansicht eines aus zwei Ringbehältern gemäß Fig. 11 und 12 bestehenden Schwingungsdämpfers,
- Fig. 15
- einen senkrechten Schnitt durch das obere Ende eines schlanken Bauwerkes in Form eines aus Tragrohr und rauchgasführendem Innenrohr bestehenden Schornsteines mit auf der Innenfläche des Tragrohres angeordnetem Schwingungsdämpfer, und
- Fig. 16
- eine Draufsicht auf einen Schwingungsdämpfer, der durch eine Mehrzahl von auf einem Kreisring angeordneten Behältern gemäß Fig. 9 gebildet ist.
- A
- Abstand
- a
- Welle
- B
- Bauwerk
- b
- Welle
- c
- Abdeckhaube
- F
- Flüssigkeit
- G
- Grundfläche
- H
- Behälterhöhe
- h
- Füllhöhe
- l
- Innenrohr
- M
- Mittelpunkt
- O
- Flüssigkeitsoberfläche
- R
- Behälter
- S
- Schnittlinie
- T
- Trennwand
- V
- Verbindungsstrebe
- W
- Behälterwand
Claims (11)
- Schwingungsdämpfer für schwingungsgefährdete schlanke Bauteile oder Bauwerke, wie Schornsteine, Maste, Antennentragwerke und Industriebehälter mit einem quasi-rotationssymmetrischen Schwingungsverhalten, aus mit einer Flüssigkeit gefüllten Behältern, die ringförmig in radialsymmetrischer bzw. quasi-radialsymmetrischer Anordnung am Bauwerk angeordnet sind, und deren Massen, Schwappfrequenz und Eigendämpfungsverhalten auf eine zu dämpfende Eigenfrequenz des schwingungsgefährdeten Bauwerks abgestimmt sind,
dadurch gekennzeichnet, daß bei jedem der Behälter der Abstand (A) jeder die Flüssigkeitsoberfläche (0) begrenzenden Behälterwand (W) vom Mittelpunkt (M) der Flüssigkeitsoberfläche (0) auf der in der Ebene der Flüssigkeitsoberfläche (0) verlaufenden Senkrechten zur Schnittlinie (S) der Ebene der Flüssigkeitsoberfläche (0) mit der entsprechenden Behälterwand (W) etwa gleich groß ist und die Behälter außen auf oder innerhalb des Mantelfläche des schlanken Bauteils oder Bauwerks (B) angeordnet sind. - Schwingungsdämpfer nach Anspruch 1, dadurch gekennzeichnet, daß die Füllhöhe (h) der Flüssigkeit in den Behältern kleiner als der Abstand (A) jeder der Flüssigkeitsoberfläche (0) begrenzenden Behälterwand (W) vom Mittelpunkt (M) der Flüssigkeitsoberfläche (0) ist.
- Schwingungsdämpfer nach Anspruch 2, dadurch gekennzeichnet, daß die Füllhöhe (h) der Flüssigkeit (F) in den Behältern kleiner als die Hälfte des Abstandes (A) jeder die Flüssigkeitsoberfläche(0) begrenzenden Behälterwand (W) vom Mittelpunkt (M) der Flüssigkeitsoberfläche (0) ist.
- Schwingungsdämpfer nach Anspruch 1, dadurch gekennzeichnet, daß die Behälter mit kreisförmiger Behältergrundfläche (G) ausgebildet sind.
- Schwingungsdämpfer nach mindestens einem der Ansprüche 1 bis 3 mit mehreren, untereinander etwa gleiche Form und Größe aufweisenden Behältern, dadurch gekennzeichnet, daß die Behälter durch Unterteilung eines insgesamt ringförmigen Behälters (R) mittels etwa radial verlaufender Trennwände (T) gebildet sind.
- Schwingungsdämpfer nach Anspruch 5, dadurch gekennzeichnet, daß der ringförmige Behälter (R) außen auf der Mantelfläche des schlanken Bauteils bzw. Bauwerks (B) angeordnet ist.
- Schwingungsdämpfer nach Anspruch 5, dadurch gekennzeichnet, daß der ringförmige Behälter (R) innerhalb der Mantelfläche des schlanken Bauteils bzw. Bauwerkes (B) angeordnet ist.
- Schwingungsdämpfer nach Anspruch 1, dadurch gekennzeichnet, daß die Behälter mit einer durch ein gleichseitiges Dreieck, ein Quadrat oder ein Vieleck mit gleich langen Seiten gebildeten Behältergrundfläche (G) ausgebildet sind.
- Schwingungsdämpfer nach Anspruch 8, dadurch gekennzeichnet, daß Behälter mit ihren Diagonalen in Hauptschwingungsrichtung des Bauteils bzw. Bauwerks (B) ausgerichtet sind.
- Schwingungsdämpfer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Behälterwände (W) etwa rechtwinklig zur Grundfläche (G) verlaufen.
- Schwingungsdämpfer nach mindestens einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Behälterwände (W) schräg nach innen geneigt verlaufen.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4418916 | 1994-05-31 | ||
DE4418916A DE4418916A1 (de) | 1993-06-04 | 1994-05-31 | Schwingungsdämpfer für schwingungsgefährdete Bauwerke |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0686733A1 EP0686733A1 (de) | 1995-12-13 |
EP0686733B1 EP0686733B1 (de) | 1999-06-16 |
EP0686733B2 true EP0686733B2 (de) | 2003-02-26 |
Family
ID=6519377
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95105685A Expired - Lifetime EP0686733B2 (de) | 1994-05-31 | 1995-04-14 | Schwingungsdämpfer für schwingungsgefährdete Bauteile und Bauwerke |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0686733B2 (de) |
AT (1) | ATE181389T1 (de) |
DK (1) | DK0686733T4 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008153489A1 (en) * | 2007-06-11 | 2008-12-18 | Vertical Wind Ab | A wind-power unit, a supporting pillar therefore and a use thereof |
DE102014113145A1 (de) | 2014-09-11 | 2016-03-17 | Hochschule Wismar | Lärmschutzwand |
WO2023025780A1 (de) | 2021-08-24 | 2023-03-02 | Hochschule Wismar | Flüssigkeitstilger zum tilgen und dämpfen von schwingungen an bauwerken |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE60034079T2 (de) | 1999-06-16 | 2007-11-22 | Neg Micon A/S | Schwingungsdämpfung in Windkraftanlagen |
US7220104B2 (en) * | 2004-12-30 | 2007-05-22 | General Electric Company | Vibration reduction system for a wind turbine |
EP2899397B1 (de) * | 2014-01-28 | 2017-01-25 | Siemens Aktiengesellschaft | Dämpfer einer Windturbine |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4783937A (en) † | 1986-08-06 | 1988-11-15 | Shimizu Construction Co., Ltd. | Device for suppressing vibration of structure |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3640479A1 (de) * | 1986-11-27 | 1988-06-09 | Erich Goergens | Einstellvorrichtung fuer schlanke bauwerksstrukturen |
NL8603259A (nl) * | 1986-12-22 | 1988-07-18 | Lenten Hendrik | Vloeistofbuffer ter beveiliging van gebouwen tegen aardbevingen. |
DD293164A5 (de) * | 1990-03-29 | 1991-08-22 | Bauakademie,Inst. F. Heizung, Lueftung U. Grundlagen D. Bautechnik,De | Schwingungstilger zur verminderung von schwingungen an bauwerken |
-
1995
- 1995-04-14 AT AT95105685T patent/ATE181389T1/de not_active IP Right Cessation
- 1995-04-14 DK DK95105685T patent/DK0686733T4/da active
- 1995-04-14 EP EP95105685A patent/EP0686733B2/de not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4783937A (en) † | 1986-08-06 | 1988-11-15 | Shimizu Construction Co., Ltd. | Device for suppressing vibration of structure |
Non-Patent Citations (2)
Title |
---|
K. Fujii, Y. Tamura, T. Wakahara: "Wind-induced Vibration of Tower and Practical Applications of Tuned Sloshing Damper", Journal of Wind Engineering, No. 37, October 1988. † |
T. Miyata, H. Yamada, Y. Saitoh. "Feasibility Study on Damping of Wind-induced Vibrations of Structure By. Breaking of Sloshing Water" Journal of Wind Engineering No. 32, May 1987 (in Japanese) † |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008153489A1 (en) * | 2007-06-11 | 2008-12-18 | Vertical Wind Ab | A wind-power unit, a supporting pillar therefore and a use thereof |
DE102014113145A1 (de) | 2014-09-11 | 2016-03-17 | Hochschule Wismar | Lärmschutzwand |
WO2016037958A1 (de) | 2014-09-11 | 2016-03-17 | Hochschule Wismar | Einrichtung zum tilgen und dämpfen von schwingungen an bauwerken |
WO2023025780A1 (de) | 2021-08-24 | 2023-03-02 | Hochschule Wismar | Flüssigkeitstilger zum tilgen und dämpfen von schwingungen an bauwerken |
DE102021121874A1 (de) | 2021-08-24 | 2023-03-02 | Hochschule Wismar | Flüssigkeitstilger zum Tilgen und Dämpfen von Schwingungen an Bauwerken |
Also Published As
Publication number | Publication date |
---|---|
DK0686733T3 (da) | 2000-01-17 |
EP0686733B1 (de) | 1999-06-16 |
ATE181389T1 (de) | 1999-07-15 |
DK0686733T4 (da) | 2003-06-23 |
EP0686733A1 (de) | 1995-12-13 |
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