EP1815068A1 - Device for damping vibrations in a building - Google Patents
Device for damping vibrations in a buildingInfo
- Publication number
- EP1815068A1 EP1815068A1 EP05795034A EP05795034A EP1815068A1 EP 1815068 A1 EP1815068 A1 EP 1815068A1 EP 05795034 A EP05795034 A EP 05795034A EP 05795034 A EP05795034 A EP 05795034A EP 1815068 A1 EP1815068 A1 EP 1815068A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mechanical
- control surface
- absorber
- vibrations
- building
- 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.)
- Granted
Links
- 238000013016 damping Methods 0.000 title claims abstract description 19
- 230000008878 coupling Effects 0.000 claims abstract description 17
- 238000010168 coupling process Methods 0.000 claims abstract description 17
- 238000005859 coupling reaction Methods 0.000 claims abstract description 17
- 239000006096 absorbing agent Substances 0.000 claims description 69
- 230000033001 locomotion Effects 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 6
- 230000002238 attenuated effect Effects 0.000 claims 2
- 230000000694 effects Effects 0.000 description 5
- 230000001965 increasing effect Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
- 230000003534 oscillatory effect Effects 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D11/00—Suspension or cable-stayed bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/02—Suspension bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
Definitions
- the invention relates to a device for damping oscillatory movements in a building, in particular in a bridge.
- Self-induced vibrations in contrast to so-called externally induced vibrations, which are caused for example by gusts of wind or by periodic vortex shedding, are excitation forces, which are caused by a displacement of the bridge.
- the air forces acting on the supporting structure influence the dynamic properties of the aeroel astatic overall system, that is to say, in particular, stiffness and damping parameters. These changes occur even at constant wind speed. If the wind speed reaches a certain critical value, the structural damping of the bridge girder is canceled. With a further increase of the wind speed, a system with negative Overall attenuation occur in which a small initial shift to an increasing vibration with almost unlimited amplitude and thus leads to failure of the bridge structure.
- the critical wind speed (Ucr) is the structural characteristic for the flutter stability of bridges. It is known that Ucr decreases with decreasing stiffness and damping of the bridge. Straight bridges with a large span, however, have a low rigidity, so that the problem of fluttering occurs for them.
- Structural stabilization refers to structural measures, such as increasing the torsional rigidity of the beam or adding additional stay cables.
- passive vibration dampers passively swinging additional masses come into consideration, which are referred to as absorber.
- the active vibration dampers can be divided into active mechanical and active aerodynamic vibration dampers.
- the latter are based on the approach of suitably modifying the flow field forming the bridge carrier so as to achieve a stabilizing effect.
- the active mechanical flutter control for example, the torsional vibration of the bridge girder is checked by an additionally applied torsional moment.
- the additional torsional moment is generated by horizontally displaceable damper masses in the bridge girder.
- the aforementioned devices have, inter alia, the disadvantage of a relatively large energy requirement and thereby reduced reliability.
- the invention has for its object to provide a device for damping vibrations in construction and structures that suppresses externally induced vibrations at high reliability with simple means and the lowest possible power input energy and the critical wind speed for self-induced oscillations (eg flutter) effectively elevated. Both torsional vibrations and vibrations in certain directions should be suppressed.
- the device according to the invention serves to dampen vibrations on structures. It has at least one aerodynamic control surface which is rotatably and / or displaceably mounted on the building. Furthermore, at least one mechanical absorber is provided, which is kinematically coupled to the control surface is.
- the device according to the invention also referred to as an aeroelastic absorber, serves to damp vibrations in structures. It has at least one aerodynamic control surface lying in the wind, rotatable and / or displaceably mounted, which can be designed as a control sign, movable edge or wing element, wherein the control surface with the mechanical absorber is positively kinematically coupled.
- the forcibly kinematic coupling is preferably effected by movable mechanical elements, such as gear lever or transmission gear.
- the mechanical absorber has a spring member which applies a restoring force to a predetermined position on the mechanical lifter.
- the mechanical absorber is a vibratory secondary system that has a favorable influence on the vibration behavior of the structure (main system).
- the mechanical absorber is provided with at least one mass body.
- the device according to the invention thus has no drive which makes an external power supply necessary.
- the mechanical absorber also has a damper element in addition to the wing element.
- the mechanical absorber is connected with its comparatively small mass via the spring element and optionally via the damper element with the building, in particular with its supporting structure. Its degree of freedom of movement is the rotation about a fixed pole relative to the structure or the displacement relative to the structure in a given direction.
- the absorber effect is due to the inertial forces of the mass and the damping forces in the possibly added damper element.
- Mechanical absorbers themselves have long been known.
- the flow forces acting on the aerodynamic control surface can also act on the vibration of the mechanical absorber via the existing positive connection.
- this influence is not required for the effectiveness of the device and, if disruptive, can be minimized by suitable storage of the control surface or otherwise.
- the coupling between the mechanical absorber and the control surface can be made such that amplitude, phase and / or frequency relationships between a vibrational movement of the mechanical absorber and the oscillatory motion of the aerodynamic control surface can be adjusted.
- the tuning can thus be adapted to changing operating conditions, such as a variable wind speed.
- a controller may be provided which controls the amplitude, phase and / or frequency ratios accordingly.
- the aerodynamic control surface can be formed as a movable edge or wing element, which connects directly to the building and is mounted rotatably about a stationary point relative to the building.
- the aerodynamic control surface can be formed as a detached from the building sign, which is rotatably connected via pylons and / or slidably connected to the building.
- the movement of the shield can also be performed so that a rotation about a, relative to the building, not fixed point occurs.
- the aerodynamic control surface is designed as a wing element which protrudes freely from the structure with a section.
- the wing element with its mass arranged on both sides of the bearing point forms the mechanical absorber in interaction with a spring between the wing element and the structure.
- the wing element is formed with an arm which projects into the building and is connected there by means of a spring to the building. Wing element, arm and spring together form the mechanical absorber.
- the arm of the wing element has a mass body at its end.
- At least two aeroelastic absorbers are arranged in pairs on opposite sides of an axis, both Torsionsschwingungen around the axis as well as vibrations in certain directions to be damped or eradicated.
- the attachment points are preferably distributed spatially in the building or structure.
- Fig. 1 is a perspective view of a section of a suspension bridge
- FIG. 2 shows a schematic view of the bridge girder in cross section with two damping devices according to the invention of a first embodiment, one on each side of the bridge girder, and FIG
- Fig. 3 is a schematic view of a structure with a erf ⁇ ndungswashen damping device in a second embodiment, in which the control surface is offset from the building.
- Fig. 1 shows a bridge girder 10 in the cutout, as used in suspension bridges.
- the stiffening beam 12 is held by hanger 14 at between the masts of the bridge tensioned ropes 16.
- Fig. 2 shows the body of the bridge girder 12 in cross section.
- the longitudinal axis of the bridge girder is marked with 18.
- On the side of the bridge girder are two wing elements 20, 22 which are each pivotally mounted in a bearing point 24, 26 and form the aerodynamic control surfaces.
- the wing elements 20, 22 On its inside, in the bridge girder 12, the wing elements 20, 22 have arms 28, 30, at the ends of which in each case a mass body 32, 34 is provided.
- each arm 28 or 30 is connected to the bridge carrier 12 via a spring element 36 or 40 and a damping element 38 or 42.
- Wing elements 20, 22 and mass bodies 32, 34 and springs 36, 40 are each arranged so that the wing elements 20, 22 remain in a predetermined position without external force influence. A deflection of the wing elements from their rest position leads to a vibration which damps the movement of the bridge girder 12.
- the mechanical absorber consists of several respectively involved masses (mass body 32 or 34, arm 28 or 30, wing element 20 or 22), a spring 36 or 40 and a damper element 38 and 42nd Its degree of freedom of movement is the rotation about the bearing point 24 or 26. It is excited to vibrate by vertical and torsional vibrations of the bridge carrier. The vibration excitation of the absorber and thus its effectiveness generally require an imbalance of the mass distribution and thus a bias of the spring 36 or 40 in the static rest position.
- the mass of the wing elements should be as small as possible in the interest of great effectiveness of the mechanical absorber.
- the positive kinematic coupling between the mechanical absorber and the aerodynamic control surface in this exemplary embodiment consists simply of the arm 28 or 30 connecting the two elements.
- the absorber effect of the mechanical absorber is due to the inertial forces of the masses involved and the damping forces in the damper element.
- the rotation of the mechanical absorber (relative to the bridge) is transferred to the aerodynamic control surface 20 or 22, which lies in the wind current and is rotatably mounted, which is assigned to the respective mechanical absorber.
- the flow field is changed dynamically and additionally induced time-varying air forces.
- the mechanical absorber according to the invention can also oscillate in a predetermined straight direction and, instead of the lever rigidly connected to the aerodynamic control surface, can also have other positive connections, such as transmission levers and gearboxes.
- the tuning of the aeroelastic absorber is done by the choice of mass m, spring constant k and damping constant c as the central mechanical characteristics, the choice of the distance of the mechanical absorber of the bridge axis, the choice of his degree of freedom of movement, the kinematics of zwang flourishen kinematic Ver ⁇ connections and the Contour and mass of aerodynamic control surfaces.
- the main effect of the aeroelastic damper is to direct the flow of air on the building by a swinging movement of the aerodynamic control surface in such a way that a rocking-up is prevented and the building is stabilized.
- Simultaneously with the control of the flow forces by the movement of the absorber can on the aerodynamic control surface acting flow forces on the existing zwang dormitore connection also act back on the vibration of the mechanical absorber.
- this influence can have a supporting or disturbing effect.
- this reaction can be suppressed to the mechanical absorber.
- FIG. 1 An embodiment in which this reaction is suppressed by the storage of the control surface is shown in FIG.
- the aerodynamic control surface of a remote from the building connected to the building by a holding device 46 plate 44.
- the shield is rotatably mounted about a bearing point 48 in the central region of the shield.
- the zwang consequently kinematic coupling with the interior of the bridge carrier located mechanical absorber 60 via a movable link member 50 which is selectively coupled via a link member 52 or 56 with the shield 44.
- the aeroelastic absorber can be provided on one or both sides (relative to the bridge longitudinal axis). With bilateral arrangement, both absorbers can also be coupled or operated independently of each other. The latter case is shown in FIG. If both absorbers are coupled (not shown), then a corresponding positive kinematic connection must be provided between the two absorbers. If, on the other hand, both absorbers are independent of each other, it is possible to fix them on one side, e.g. leeward to arrest.
- a zwang conspiracye kinematic coupling between mechanical absorber and aerodynamic control surface which allows frequency ratios between the vibration of the mechanical absorber and the Adjust the oscillation of the aerodynamic control surface.
- the amplitude ratio can be in the case of a translation linkage z. B. by moving the connection points of the link members, as shown in Fig. 3 or similar set.
- a hinge 58 is fixedly connected to the first link member 52 and locked within a slot 54 in the second link member 50. The adjustment can thus be made steplessly by moving the swivel joint 58 in the slot 54.
- the amplitude ratio can be stepped or continuously adjusted with a corresponding manual or continuously variable transmission.
- the preferred embodiment of the invention has been described in the context of a bridge but is by no means limited to bridges in its use. Rather, the device according to the invention can also be used for horizontal vibrations, as they occur, for example, in towers. Here, the axis 18 then runs in the vertical direction.
- the aeroelastic absorber has a high degree of economic efficiency and a high degree of operational reliability due to the dispensability of external energy supply.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Vibration Prevention Devices (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004053898A DE102004053898A1 (en) | 2004-11-09 | 2004-11-09 | Device for damping oscillatory motion in a building |
PCT/EP2005/011327 WO2006050802A1 (en) | 2004-11-09 | 2005-10-21 | Device for damping vibrations in a building |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1815068A1 true EP1815068A1 (en) | 2007-08-08 |
EP1815068B1 EP1815068B1 (en) | 2018-05-16 |
Family
ID=35677625
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05795034.7A Active EP1815068B1 (en) | 2004-11-09 | 2005-10-21 | Device for damping vibrations in a building |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1815068B1 (en) |
KR (1) | KR101353281B1 (en) |
DE (1) | DE102004053898A1 (en) |
DK (1) | DK1815068T3 (en) |
WO (1) | WO2006050802A1 (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3280843B1 (en) | 2015-04-08 | 2020-04-29 | Technische Universität Hamburg-Harburg | Bridge comprising a vibration damping device |
CN106436948B (en) * | 2016-09-13 | 2018-11-06 | 哈尔滨工业大学深圳研究生院 | A kind of drum type brake traveling wave flow spoiler drag reduction vibration absorber |
CN106958192B (en) * | 2017-04-13 | 2018-12-18 | 华北水利水电大学 | A kind of control structure and method inhibiting Bridge Flutter |
CN108035237A (en) * | 2017-12-31 | 2018-05-15 | 西南交通大学 | The wing plate system and its control method that a kind of suppression Bridge Flutter and whirlpool shake |
CN108517760B (en) * | 2018-04-17 | 2019-05-17 | 同济大学 | A kind of central stabilizing mechanism improving split type box beam flutter stability |
CN108842599B (en) * | 2018-07-16 | 2019-10-01 | 同济大学 | One kind being based on bionic pneumatic drag reduction device and bridge |
CN111305042B (en) * | 2020-02-29 | 2021-08-03 | 东北林业大学 | Large-span bridge wind vibration control method of self-adaptive swing flap |
CN112458882A (en) * | 2020-11-30 | 2021-03-09 | 大连理工大学 | Flexible device for controlling bridge vortex vibration |
CN112814457B (en) * | 2021-01-04 | 2021-12-24 | 中国矿业大学 | Threaded sleeve type tension-compression friction energy dissipater and using method thereof |
CN113235398B (en) * | 2021-06-02 | 2024-08-09 | 哈尔滨工业大学 | Active suction and blowing intelligent control device for wind-induced vibration of single box girder of large-span bridge girder |
CN114922049A (en) * | 2022-03-22 | 2022-08-19 | 中国计量大学 | Control device for restraining wind vibration of bridge |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2270537A (en) * | 1939-02-08 | 1942-01-20 | Ludington Charles Townsend | Building |
JPH05171837A (en) * | 1991-12-25 | 1993-07-09 | Nkk Corp | Flutter vibration absorber of bridge girder |
DK169444B1 (en) * | 1992-02-18 | 1994-10-31 | Cowi Radgivende Ingeniorer As | System and method for countering wind-induced oscillations in a bridge carrier |
GB9218794D0 (en) * | 1992-09-04 | 1992-10-21 | Piesold David D A | Bridge deck system |
GB2313612B (en) * | 1996-05-29 | 2000-06-07 | Marconi Gec Ltd | Bridge stabilisation |
-
2004
- 2004-11-09 DE DE102004053898A patent/DE102004053898A1/en not_active Ceased
-
2005
- 2005-10-21 WO PCT/EP2005/011327 patent/WO2006050802A1/en active Application Filing
- 2005-10-21 KR KR1020077012861A patent/KR101353281B1/en active IP Right Grant
- 2005-10-21 DK DK05795034.7T patent/DK1815068T3/en active
- 2005-10-21 EP EP05795034.7A patent/EP1815068B1/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2006050802A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102004053898A1 (en) | 2006-05-11 |
WO2006050802A1 (en) | 2006-05-18 |
KR20070085873A (en) | 2007-08-27 |
EP1815068B1 (en) | 2018-05-16 |
DK1815068T3 (en) | 2018-08-13 |
KR101353281B1 (en) | 2014-01-22 |
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