EP1756369B1 - Ossature porteuse avec d'un dispositif amortisseur des oscillations - Google Patents

Ossature porteuse avec d'un dispositif amortisseur des oscillations Download PDF

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Publication number
EP1756369B1
EP1756369B1 EP05750676A EP05750676A EP1756369B1 EP 1756369 B1 EP1756369 B1 EP 1756369B1 EP 05750676 A EP05750676 A EP 05750676A EP 05750676 A EP05750676 A EP 05750676A EP 1756369 B1 EP1756369 B1 EP 1756369B1
Authority
EP
European Patent Office
Prior art keywords
supporting structure
structure according
mass
bridge
mass bodies
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.)
Not-in-force
Application number
EP05750676A
Other languages
German (de)
English (en)
Other versions
EP1756369A1 (fr
Inventor
Rüdiger KÖRLIN
Uwe Starossek
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Freyssinet SAS
Original Assignee
Technische Universitaet Hamburg TUHH
Tutech Innovation GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Technische Universitaet Hamburg TUHH, Tutech Innovation GmbH filed Critical Technische Universitaet Hamburg TUHH
Publication of EP1756369A1 publication Critical patent/EP1756369A1/fr
Application granted granted Critical
Publication of EP1756369B1 publication Critical patent/EP1756369B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • E01D11/02—Suspension bridges

Definitions

  • the invention relates to a carrier with a device for damping a flapping motion in the structure, in particular in a bridge.
  • 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.
  • the passive vibration damping refers essentially to structural measures, such as increasing the torsional stiffness of the carrier, the addition of additional stay cables and cross braces or the use of multi-part bridge girders.
  • 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 torsional vibration of the bridge girder is checked, for example, by an additionally applied torsional moment.
  • the additional torsional moment is generated by horizontally displaceable damper masses in the bridge girder.
  • the invention has for its object to provide a damper device for damping a flapping motion for a structure that increases with simple means and the least possible use of energy, the critical wind speed for a flutter.
  • the device according to the invention for damping a flapping motion in a supporting structure has at least one pair of mass bodies.
  • the mass bodies are arranged on the opposite sides of an axis about which a rotational movement or a torsional movement of the structure takes place during the flapping motion.
  • Each of the mass bodies is pivotally mounted, such that the mass of each body is distributed eccentrically to a bearing point.
  • a drive is provided, the at least one of Mass body adjusted by a predetermined angle in a plane perpendicular to the axis.
  • the mass body is mounted eccentrically about a bearing point, so that, for example, can be clearly defined by the connection of the center of gravity and bearing point a direction for the mass body, the compound is in the plane perpendicular to the axis.
  • This direction of at least one of the mass bodies is changed by the drive.
  • the change in angle is effected by a control unit which, depending on measured values, actuates at least one drive for changing the angular position of the mass body.
  • Unlike a rotating damping mass is not exclusively worked with the torque of a damping mass in the inventive device. Rather, in the device according to the invention an adjustment of two mass bodies in each case takes place relative to the supporting structure, so as to occur To dampen flapping motion and / or to give the structure a sufficient damping torque.
  • each mass body is adjustable in a pair of mass bodies in its angular position.
  • each mass body is pivotally mounted via a pivot arm.
  • the eccentrically arranged mass body has a comparatively large moment of inertia.
  • the pivot arms are each connected via springs to the structure.
  • the springs hold the Schwenkann in a rest position, which ensures a balanced mass distribution to the structure in the event that no wind forces attack.
  • the mass bodies of a pair of mass bodies are equidistantly spaced from the axis so that the pair is symmetrical about the axis.
  • an electric motor is provided as the drive for a pair of mass bodies.
  • it can be provided as a drive and a hydraulic actuator.
  • the pivotal movement of the mass body takes place within a limited angular range.
  • the angle range here is preferably arranged symmetrically about a rest position of the mass body.
  • the support structure to be damped is preferably a bridge, in particular a suspension bridge, wherein the mass bodies are preferably arranged on both sides of the central longitudinal axis of the bridge girders.
  • a plurality of pairs of mass bodies may be arranged along the bridge girders, it being possible for one or more pairs of mass bodies to be provided in the bridge girder, depending on the length of the bridge girders.
  • a sensor which detects a shift and / or a time derivative of the displacement of the structure.
  • the measurement results are available at the control unit.
  • the time derivation may be, for example, the second derivative, which is then detected via an acceleration sensor.
  • the displacement of the structure is measured in the central longitudinal axis.
  • a sensor which detects a rotation and / or a time derivative of the rotation of the structure and abut the measurement results of the control unit.
  • the twist is a measure of the torsion of the bridge girder.
  • the sensor detects the rotation preferably about the central longitudinal axis.
  • control unit calculates, taking into account the frequency and amplitude of the measured values, the angular position for the mass body to be controlled.
  • control unit can also specify the angular velocity or the angular acceleration.
  • Fig. 1 shows a bridge girder 10 in the neck, as it occurs in suspension bridges.
  • the bridge body 12 is held by suspension cables / hangers 14 to a rope 16 stretched between the pylons of the bridge.
  • the bridge girder 10 has due to its design, its suspension, the materials used, its dimensions and other sizes a certain stiffness and a certain damping.
  • the vibration behavior of the bridge carrier is also influenced by the stiffness and damping of the pylons.
  • Fig. 2 shows the body of the bridge girder 12 in cross section.
  • the longitudinal axis of the bridge girder is marked with 18. Laterally from the longitudinal axis 18, two drives 20 and 22 are arranged.
  • the mass bodies 24 and 26 are each connected via a lever arm 28 and 30 with the associated drives.
  • the lever arms 28 and 30 are mounted in the points 32 and 34 in the bridge girder (not shown in detail).
  • the bearing points 32 and 34 lie on a horizontal axis 36, based on the resting state of the bridge girder.
  • the bearing points 30 and 32 may be suspended resiliently and damped in the bridge girder.
  • Fig. 2 shows an example of an angular interval 38, in which the mass body 24 and 26 can be adjusted independently of each other.
  • Fig. 3 schematically shows the physical model underlying the control of the displacement of the mass bodies.
  • the flapping motion is broken down into a movement with two degrees of freedom.
  • the first degree of freedom denotes the displacement h, which describes a lifting and lowering of the bridge girder relative to the bridge girders.
  • the second degree of freedom is a torsion twist about the angle ⁇ .
  • a lateral shift, ie a shift transversely to the direction h, is not explicitly taken into account in this model, but could still be included.
  • the model now assumes, for the displacement h, that it is a damped vibration caused by a spring element 40 and a damper 42 in FIG Fig. 3 is shown.
  • a spring element 44 and a damping element 46 is assumed.
  • a linear restoring force is applied to the model.
  • non-linear terms in particular in the range of large amplitudes, may also be included in the calculation.
  • the solution of the lateral vibration equations for h (t) and ⁇ (t) describes the movement of the bearing points 32 and 34. Starting from the position at the bearing points 32 and 34, the angles ⁇ 1 and ⁇ 2 for the deflection of the mass bodies 24 and 26 are determined. Here, the angle can be counted as the deflection angle of the lever arm relative to the imaginary connection 48 between the bearing points 32 and 34 or with respect to the horizontal axis 36. Preferred first variant.
  • the regulation made to dampen and suppress the flapping motion can be done in different ways.
  • the structural displacements h and ⁇ and their time derivative dh / dt and ⁇ / dt are measured.
  • the position of the bearing points 32 and 34 and the pivot arms is also measured.
  • setpoint values for the deflection angles ⁇ 1 and ⁇ 2 are determined on the basis of an underlying model. It is also possible, depending on the selected drive, to specify desired values for the first or second time derivative of the rotational angles ⁇ 1 and ⁇ 2 .
  • the greater proportion of the occurring torques of the electric motors is used to overcome the weight of the eccentrically arranged damper mass. As a result, the desired Schwenkarmamba can be ensured about the horizontal center axis 36.
  • the device according to the invention for damping a flapping motion in a supporting structure is not limited to use in suspension bridges, but can also be used, for example for damping horizontal vibrations in towers.
  • the axis 18 extends in the vertical direction. The advantage here is that the weight of the mass body does not have to be overcome.
  • Fig. 4 finally shows a comparison of the energy requirements of various possible mass systems.
  • the energy consumption was normalized for a mass ratio, ie quotient of damper mass and building mass, from 1% to an energy requirement of 100% for the method of a centric rotation body (ZRA) known in the prior art.
  • ZRA centric rotation body
  • HA In the process referred to as HA, work is done with a horizontally displaceable mass.
  • the inventive method of eccentrically pivoting mass damper is called ERA. Fig. 4 It can be seen that the energy required for flutter control in the invention is significantly lower than in the known method.

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)
  • Portable Nailing Machines And Staplers (AREA)

Claims (17)

  1. Ossature porteuse avec un dispositif amortisseur des oscillations, comprenant
    - au moins une paire de corps massiques (24, 26) qui sont disposés sur des faces opposées d'un axe (18) autour desquels est exécuté un mouvement de torsion de l'ossature porteuse en cas d'oscillation,
    - les corps massiques (24, 26) étant logés respectivement de façon pivotante, de sorte que la masse (24, 26) de chaque corps est répartie excentriquement autour d'un point de palier (32, 34),
    - au moins un entraînement (20, 22) qui ajuste au moins un corps massique (24, 26) à un angle prédéterminé (γ1, γ2) dans un plan perpendiculaire à l'axe, et
    - une unité de commande qui commande en fonction des valeurs mesurées de la position et/ou du mouvement d'ossature porteuse au moins un entraînement (20, 22) pour modifier la position angulaire (γ1, γ2) du corps massique (24, 26).
  2. Ossature porteuse selon la revendication 1, caractérisée en ce que chaque corps massique (24, 26) est ajustable dans sa position angulaire (γ1,γ2).
  3. Ossature porteuse selon la revendication 1 ou 2, caractérisée en ce que chaque corps massique (24, 26) est fixé sur un bras pivotant (28, 30) qui est logé de façon pivotante.
  4. Ossature porteuse selon la revendication 3, caractérisée en ce que les bras pivotants (28, 30) sont reliés respectivement par des ressorts à l'ossature porteuse.
  5. Ossature porteuse selon une des revendications 1 à 4, caractérisée en ce que chaque corps massique (24, 26) d'une paire de corps massiques est situé à une distance égale de l'axe (18).
  6. Ossature porteuse selon une des revendications 1 à 4, caractérisée en ce que respectivement un moteur électrique est prévu en tant qu'entraînement (20, 22) d'une paire de corps massiques.
  7. Ossature porteuse selon une des revendications 1 à 6, caractérisée en ce que respectivement un actionneur hydraulique est prévu en tant qu'entraînement d'une paire de corps massiques (24, 26).
  8. Ossature porteuse selon une des revendications 1 à 7, caractérisée en ce que chaque corps massique (24, 26) est pivotant dans une plage angulaire limitée (38).
  9. Ossature porteuse selon la revendication 8, caractérisée en ce que la plage angulaire est orientée symétriquement autour d'une position de repos (36) des corps massiques.
  10. Ossature porteuse selon une des revendications 1 à 10, caractérisée en ce que l'ossature porteuse devant être amortie est un pont avec une ou plusieurs poutres de ponts.
  11. Ossature porteuse selon la revendication 10, caractérisée en ce que les corps massiques sont disposés des deux côtés de l'axe longitudinal médian de la poutre de pont.
  12. Ossature porteuse selon les revendications 10 ou 11, caractérisée en ce que plusieurs paires de corps massiques sont disposées le long de la ou des poutres de pont.
  13. Ossature porteuse selon une des revendications 10 à 12, caractérisée en ce qu'au moins un capteur est prévu, lequel détecte un déplacement (h) et/ou une dérivée temporelle du déplacement de la poutre de pont, les résultats de mesure étant l'objet de l'unité de commande.
  14. Ossature porteuse selon une des revendications 1 à 13, caractérisée en ce que le déplacement de l'ossature porteuse dans l'axe (18) est mesuré.
  15. Ossature porteuse selon une des revendications 1 à 14, caractérisée en ce qu'au moins un capteur est prévu, lequel détecte une torsion (α) et/ou une dérivée temporelle de la torsion de l'ossature porteuse, les résultats de mesure étant l'objet de l'unité de commande.
  16. Ossature porteuse selon la revendication 15, caractérisée en ce qu'une torsion (α) de l'ossature porteuse est détectée autour de l'axe (18).
  17. Ossature porteuse selon une des revendications 13 à 16, caractérisée en en ce que l'unité de commande commande les corps massiques en tenant compte de la fréquence et de l'amplitude des valeurs mesurées (h, α), les positions angulaires (γ1, γ2), la première dérivée temporelle des angles (dγ1/dt, dγ2/dt) ou la seconde dérivée temporelle des angles (d2γ1/dt2, d2γ2/dt2) des corps massiques.
EP05750676A 2004-05-26 2005-05-25 Ossature porteuse avec d'un dispositif amortisseur des oscillations Not-in-force EP1756369B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004025761A DE102004025761A1 (de) 2004-05-26 2004-05-26 Vorrichtung zur Dämpfung einer Flatterbewegung bei einem Tragwerk
PCT/EP2005/005663 WO2005116340A1 (fr) 2004-05-26 2005-05-25 Dispositif amortisseur des oscillations d'une ossature porteuse

Publications (2)

Publication Number Publication Date
EP1756369A1 EP1756369A1 (fr) 2007-02-28
EP1756369B1 true EP1756369B1 (fr) 2008-07-09

Family

ID=34970111

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Application Number Title Priority Date Filing Date
EP05750676A Not-in-force EP1756369B1 (fr) 2004-05-26 2005-05-25 Ossature porteuse avec d'un dispositif amortisseur des oscillations

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EP (1) EP1756369B1 (fr)
AT (1) ATE400703T1 (fr)
DE (2) DE102004025761A1 (fr)
WO (1) WO2005116340A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006059189B4 (de) 2006-12-15 2008-08-14 Tutech Innovation Gmbh Vorrichtung zur Schwingungskontrolle einer Konstruktion
DE102011109070B4 (de) 2011-07-30 2016-05-12 Tutech Innovation Gmbh Vorrichtung sowie Satz von Vorrichtungen zur Kontrolle mechanischer Schwingungen
DE202016005517U1 (de) 2016-09-12 2016-10-12 Esm Energie- Und Schwingungstechnik Mitsch Gmbh Vorrichtungen und Anlagen mit elastischem Unwuchtantrieb zur Modifizierung von Schwingungszuständen
CN106978933A (zh) * 2017-02-27 2017-07-25 大连理工大学 一种基于旋转激励作动器的主动质量阻尼装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2668990B2 (ja) * 1988-10-06 1997-10-27 石川島播磨重工業株式会社 構造物制振装置
JPH05171837A (ja) * 1991-12-25 1993-07-09 Nkk Corp 橋桁のフラッタ振動抑制装置
JP3732353B2 (ja) * 1998-04-16 2006-01-05 株式会社神戸製鋼所 橋梁の制振構造

Also Published As

Publication number Publication date
ATE400703T1 (de) 2008-07-15
DE102004025761A1 (de) 2005-12-22
DE502005004653D1 (de) 2008-08-21
EP1756369A1 (fr) 2007-02-28
WO2005116340A1 (fr) 2005-12-08

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