WO2019033789A1 - Permanent magnet-based tuned mass damper device for deterioration control of bridge expansion joint - Google Patents
Permanent magnet-based tuned mass damper device for deterioration control of bridge expansion joint Download PDFInfo
- Publication number
- WO2019033789A1 WO2019033789A1 PCT/CN2018/084943 CN2018084943W WO2019033789A1 WO 2019033789 A1 WO2019033789 A1 WO 2019033789A1 CN 2018084943 W CN2018084943 W CN 2018084943W WO 2019033789 A1 WO2019033789 A1 WO 2019033789A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- permanent magnet
- plate
- copper plate
- mass
- expansion joint
- Prior art date
Links
Images
Classifications
-
- 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
- E01D19/06—Arrangement, construction or bridging of expansion joints
Definitions
- the TMD consists of a mass, a spring and a damping system.
- the inertial force generated by the motion of the system reacts to the inertial force of the main structure to make it opposite to the direction of the excitation force.
- the reaction values of the main structure are reduced to achieve the purpose of controlling the vibration of the main structure.
- Existing small TMD damping elements are generally rubber materials, and large TMDs use oil dampers, but both dampers have problems with rubber aging and oil leakage and fatigue.
- Graphene has excellent electrical, thermal and mechanical properties and can be applied to almost all fields.
- the preparation method of graphene has been continuously improved to produce large-area, low-cost, high-quality graphene. Based on the excellent properties of graphene, it will likely become the core material for high speed transistors, high sensitivity sensors and composite materials.
- Graphene has strong chemical inertness and stability, long service life and good stability.
- the preparation of a graphene film on the copper surface can improve the corrosion resistance of copper and increase the electrical and thermal conductivity.
- a permanent magnet type tuned mass damping device for the control of bridge expansion joint disease is invented to overcome the existing viscous damping.
- the shortcomings of the device can cut the magnetic induction line in different directions, thereby effectively reducing the vibration of the joint expansion joint in all directions, and greatly reducing the distortion probability of the expansion joint caused by the corner end angle of the beam.
- the frequency of the pendulum TMD is determined by the pendulum length. Therefore, the TMD frequency can be brought to the design value by adjusting the stiffness of the spring, and the damper performance is optimized.
- the top plate of the mass block and the inner permanent magnet of the bottom plate are arranged opposite each other, the magnetic grade is N, S level, and the magnetic induction intensity of the copper plate on the same row reaches the maximum when the magnetic level of the adjacent permanent magnet is opposite. For the best.
- the permanent magnet in order to increase the magnetic flux and the cutting efficiency to a greater extent, can be added to the outside of the top of the mass, and a copper plate is fixed on the upper fixing plate at the upper part of the mass.
- the mass in the box girder will oscillate, the inner copper plate cuts the magnetic induction line generated by the permanent magnet inside the mass, and the permanent magnet on the outer side of the outer copper cutting mass is generated.
- the magnetic induction line generates a corresponding induced electromotive force in the inner and outer copper plates to form an eddy current.
- ⁇ is the thickness of the conductor
- S is the surface area of the conductor
- the negative sign indicates that the electromagnetic force is opposite to the linear velocity of the cutting magnetic induction, and according to Lenz's law, the eddy current generates a magnetic field opposite to the direction of the original magnetic field.
- a damping force is formed to prevent the relative motion of the two, which causes the energy to be consumed by the resistance heat effect of the copper plate, and finally reduces the vibration of the expansion joint.
- the present invention integrates a permanent magnet and a mass by arranging a permanent magnet inside and outside the mass, and mounting a copper plate inside and outside the mass.
- the mass is oscillated, and the inner copper plate cuts the magnetic induction line generated by the permanent magnet inside the mass; when the box beam vibrates vertically, the mass is vertically displaced, and the outer copper plate is cut outside the mass.
- the magnetic induction line generated by the magnet is known from the eddy current principle, and the vibration energy is dissipated by the resistance heat effect of the copper plate.
- the permanent magnet tuned mass damping device of the invention is simple and flexible to install, and can be respectively arranged according to the transverse bridge direction and the shun bridge direction, thereby simultaneously controlling the displacement of the transverse bridge to the bridge beam end, and greatly reducing the expansion joint caused by the beam end angle.
- Figure 1 is a schematic view showing the structure of the device of the present invention.
- Figure 5 is a side view of the steel sleeve of the device of the present invention.
- Figure 6 is a cross-sectional view taken along line II-II of Figure 5 of the present invention.
- a permanent magnet type tuned mass damping device for bridge expansion joint disease control comprising an upper fixing plate 9 welded to a top plate 10 at an end of a box beam connected to an expansion joint, and a lower fixing plate 11 welded to the box beam bottom plate 12;
- the inner and outer mounting permanent magnets 5 of the block 1 are integrally formed with the mass block 1 and are hinged to the upper fixing plate 9 by a spring II6;
- the inner copper plate 4 is connected to the upper fixing plate 9 via the spring III7 in the steel sleeve, and is located inside the mass block 1, the steel sleeve
- the top of the 8 is bolted to the upper fixing plate 9;
- the outer copper plate 3 and the magnetizer 15 are fixed to the upper fixing plate 9 and the lower fixing plate 11, and one end of the spring I2 is fixed to the lower fixing plate 11 and the other end is fixed to the curved plate 13.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
Description
Claims (5)
- 一种用于桥梁伸缩缝病害控制的永磁式调谐质量阻尼装置,包括上固定板焊接于与伸缩缝相连的箱梁端部的顶板,下固定板与箱梁底板焊接;质量块内外侧安装永磁铁与质量块构成整体,通过弹簧铰接于上固定板;内铜板通过钢套管内的弹簧与上固定板相连并位于质量块内侧,钢套管顶部与上固定板栓接;外铜板和导磁体与上固定板及下固定板固结,底部弹簧一端固定于下固定板,另一端与弧形板固结。A permanent magnet tuned mass damping device for bridge expansion joint disease control, comprising an upper fixed plate welded to a top plate of an end of a box girder connected with an expansion joint, a lower fixed plate welded to the bottom of the box girder; The permanent magnet is integrally formed with the mass, and is hinged to the upper fixing plate by a spring; the inner copper plate is connected to the upper fixing plate through a spring in the steel sleeve and is located inside the mass block, and the top of the steel sleeve is bolted with the upper fixing plate; the outer copper plate and the guide The magnet is fixed to the upper fixing plate and the lower fixing plate, and one end of the bottom spring is fixed to the lower fixing plate, and the other end is fixed to the curved plate.
- 根据权利要求1所述的桥梁伸缩缝病害控制的永磁式调谐质量阻尼装置,其特征在于,所述铜板外部覆盖有石墨烯涂层,钢套管外部涂有环氧树脂,永磁铁为钕铁硼材料。The permanent magnet type tuned mass damping device for bridge expansion joint disease control according to claim 1, wherein the copper plate is covered with a graphene coating, the outer portion of the steel sleeve is coated with epoxy resin, and the permanent magnet is 钕Iron boron material.
- 根据权利要求1所述的桥梁伸缩缝病害控制的永磁式调谐质量阻尼装置,其特征在于,所述永磁铁在布置时,质量块内侧正对的永磁铁磁级为N、S级相对,且同排相邻永磁铁磁级相反。The permanent magnet type tuned mass damping device for bridge expansion joint disease control according to claim 1, wherein when the permanent magnet is arranged, the magnetic poles of the permanent magnets facing the inner side of the mass block are N and S grades, And the magnetic level of the adjacent permanent magnets in the same row is opposite.
- 根据权利要求1所述的桥梁伸缩缝病害控制的永磁式调谐质量阻尼装置,其特征在于,所述质量块顶板外部可增加永磁铁,同时在质量块上部增设铜板固定于上固定板。The permanent magnet type tuned mass damping device for the bridge expansion joint disease control according to claim 1, wherein the permanent magnet is added to the outside of the top of the mass block, and the copper plate is fixed on the upper fixed plate at the upper part of the mass.
- 根据权利要求1所述的桥梁伸缩缝病害控制的永磁式调谐质量阻尼装置,其特征在于,所述钢套管与质量块顶板下缘齐平处开孔,开孔处设限位短板与弹簧在水平方向相连。The permanent magnet type tunable mass damping device for the bridge expansion joint disease control according to claim 1, wherein the steel sleeve is open to the bottom edge of the top plate of the mass block, and the limit short plate is provided at the opening. Connected to the spring in a horizontal direction.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201710695650.6 | 2017-08-15 | ||
CN201710695650.6A CN107354867B (en) | 2017-08-15 | 2017-08-15 | A kind of magneto tuning quality damping unit for bridge expanssion joint Disease management |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2019033789A1 true WO2019033789A1 (en) | 2019-02-21 |
Family
ID=60288420
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2018/084943 WO2019033789A1 (en) | 2017-08-15 | 2018-04-27 | Permanent magnet-based tuned mass damper device for deterioration control of bridge expansion joint |
Country Status (2)
Country | Link |
---|---|
CN (1) | CN107354867B (en) |
WO (1) | WO2019033789A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107354867B (en) * | 2017-08-15 | 2019-04-30 | 东南大学 | A kind of magneto tuning quality damping unit for bridge expanssion joint Disease management |
CN107964837A (en) * | 2017-12-06 | 2018-04-27 | 中建空列(北京)工程设计研究院有限公司 | Track joint connecting equipment and the track for including the track joint connecting equipment |
CN108425986B (en) * | 2018-04-17 | 2023-06-02 | 中铁大桥科学研究院有限公司 | Cylindrical eddy current damping device, damping adjustment method and bridge vibration reduction structure |
CN110589816B (en) * | 2019-10-12 | 2022-08-30 | 陕西拓讯建筑工程有限公司 | Magnetic suspension filter device of graphene based ultrasonic stripping method |
CN112283285B (en) * | 2020-10-30 | 2021-07-20 | 湖南大学 | Horizontal tuning cantilever type eddy current damper |
CN112524196B (en) * | 2020-11-18 | 2021-09-28 | 东南大学 | Eddy current energy dissipation and vibration reduction type bridge expansion joint device |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001262512A (en) * | 2000-03-14 | 2001-09-26 | Sumitomo Rubber Ind Ltd | Cable damping device |
CN101761146A (en) * | 2010-01-04 | 2010-06-30 | 湖南大学 | Permanent-magnet type eddy current tuned mass damper |
CN102031751A (en) * | 2010-12-23 | 2011-04-27 | 湖南大学 | Big-tonnage cantilever type horizontal tuned mass damper for regulating eddy-current damping |
CN103132628A (en) * | 2013-03-13 | 2013-06-05 | 上海材料研究所 | Pendulum eddy current tuning mass damper device |
CN103758029A (en) * | 2014-01-10 | 2014-04-30 | 东南大学 | Permanent-magnet tuned mass damping device for stayed cable vibration damping control |
CN107354867A (en) * | 2017-08-15 | 2017-11-17 | 东南大学 | A kind of magneto tuning quality damping unit for bridge expanssion joint Disease management |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004190776A (en) * | 2002-12-11 | 2004-07-08 | Hitachi Zosen Corp | Bearing device using magnetic viscous fluid |
US8402702B1 (en) * | 2011-04-01 | 2013-03-26 | Roberto Villaverde | Aseismic sliding isolation system using hydromagnetic bearings |
CN104264854B (en) * | 2014-08-28 | 2015-10-28 | 华北水利水电大学 | A kind of electromagnetic levitation type horizontal tuned mass damper |
CN105804263B (en) * | 2016-04-26 | 2018-02-27 | 同济大学 | A kind of sliding isolated bearing |
-
2017
- 2017-08-15 CN CN201710695650.6A patent/CN107354867B/en active Active
-
2018
- 2018-04-27 WO PCT/CN2018/084943 patent/WO2019033789A1/en active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001262512A (en) * | 2000-03-14 | 2001-09-26 | Sumitomo Rubber Ind Ltd | Cable damping device |
CN101761146A (en) * | 2010-01-04 | 2010-06-30 | 湖南大学 | Permanent-magnet type eddy current tuned mass damper |
CN102031751A (en) * | 2010-12-23 | 2011-04-27 | 湖南大学 | Big-tonnage cantilever type horizontal tuned mass damper for regulating eddy-current damping |
CN103132628A (en) * | 2013-03-13 | 2013-06-05 | 上海材料研究所 | Pendulum eddy current tuning mass damper device |
CN103758029A (en) * | 2014-01-10 | 2014-04-30 | 东南大学 | Permanent-magnet tuned mass damping device for stayed cable vibration damping control |
CN107354867A (en) * | 2017-08-15 | 2017-11-17 | 东南大学 | A kind of magneto tuning quality damping unit for bridge expanssion joint Disease management |
Also Published As
Publication number | Publication date |
---|---|
CN107354867B (en) | 2019-04-30 |
CN107354867A (en) | 2017-11-17 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2019033789A1 (en) | Permanent magnet-based tuned mass damper device for deterioration control of bridge expansion joint | |
CN205639427U (en) | Harmonious mass damper of suspension type two freedoms current vortex | |
CN107355509B (en) | A kind of current vortex vibration absorber using lever principle | |
Wang et al. | Feasibility study of a large-scale tuned mass damper with eddy current damping mechanism | |
Huang et al. | Modeling, testing, and validation of an eddy current damper for structural vibration control | |
CN203784189U (en) | Suspension type electric eddy current tuning quality damper device | |
CN106337591A (en) | Novel pendulum-type eddy current damping tuned mass vibration absorber | |
US20190273452A1 (en) | Electromagnetic vibration energy harvester for urban rail transit bridge health monitoring | |
CN108119594B (en) | Magnetorheological self-regulation vibration isolator and electric current become self-regulation vibration isolator | |
CN206449146U (en) | A kind of brace type eddy current tuned mass damper | |
CN106015420A (en) | Semi-active vibration control eddy current damper | |
CN207829204U (en) | A kind of rail mounted eddy current tuned mass damper | |
CN210344129U (en) | Bridge eddy current damper | |
CN211231406U (en) | Bidirectional horizontal eddy current tuned mass damper based on nonlinear energy trap | |
CN106441953B (en) | A kind of magnetic suspension train track coupled resonance experimental rig | |
CN103775549A (en) | Eccentric eddy current tuned mass damping device | |
CN105138798A (en) | Pendulum eddy current tuned mass damper and method for achieving structure vibration reduction | |
CN106989130A (en) | A kind of half active mono-pendulum type eddy current tuned mass damper | |
CN103758029A (en) | Permanent-magnet tuned mass damping device for stayed cable vibration damping control | |
CN109914633A (en) | Eddy current damper and eddy current tuned mass damper | |
TW201439405A (en) | Swing type tuned mass damper system | |
CN114483866B (en) | Electromagnetic damping coupled spring vibration isolator | |
CN210918422U (en) | Tuned mass damper | |
CN108590301A (en) | A kind of electric vortex type coupling beam damper | |
CN110485788A (en) | A kind of tuned mass damper |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 18846524 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 18846524 Country of ref document: EP Kind code of ref document: A1 |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 18846524 Country of ref document: EP Kind code of ref document: A1 |
|
32PN | Ep: public notification in the ep bulletin as address of the adressee cannot be established |
Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 22/12/2020) |