CN113136787A - Novel lever TMD device with amplification mass effect and spring stiffness - Google Patents
Novel lever TMD device with amplification mass effect and spring stiffness Download PDFInfo
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- CN113136787A CN113136787A CN202010050345.3A CN202010050345A CN113136787A CN 113136787 A CN113136787 A CN 113136787A CN 202010050345 A CN202010050345 A CN 202010050345A CN 113136787 A CN113136787 A CN 113136787A
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- 230000000694 effects Effects 0.000 title claims abstract description 30
- 230000003321 amplification Effects 0.000 title claims abstract description 11
- 238000003199 nucleic acid amplification method Methods 0.000 title claims abstract description 11
- 230000005484 gravity Effects 0.000 claims description 6
- 230000000087 stabilizing effect Effects 0.000 claims description 5
- 230000006835 compression Effects 0.000 abstract description 5
- 238000007906 compression Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
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Classifications
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- 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
Abstract
The present invention provides a novel lever TMD device with amplified mass effect and spring rate. The novel lever TMD device with the mass amplification effect and the spring stiffness comprises a base, wherein a mass block rotating shaft is arranged on one side of the top of the base. According to the novel lever TMD device with the mass amplification effect and the spring stiffness, the vibration working mode of the TMD is changed from vertical vibration of a mass block spring into rotation vibration of an adjustable mass block around a shaft, and the spring is arranged in a proper position between the adjustable mass block and a mass block rotation shaft; the mass effect of the adjustable mass block is amplified by adjusting the position of the spring, the bearing capacity and rigidity of the spring are effectively amplified on the basis of not changing the traditional TMD frequency, the structure effectively avoids the limitation that the rigidity and the bearing capacity of the common cylindrical compression spring cannot meet the expected frequency and rigidity, the whole device is easy to implement and is relatively compact, and the manufacturing cost is relatively low.
Description
Technical Field
The invention relates to the field of bridge auxiliary equipment, in particular to a novel lever TMD device with an amplification mass effect and spring stiffness.
Background
The river-crossing bridge mostly adopts a large-span steel box girder as a main girder, and is mainly characterized by small rigidity, light self weight, low structural damping and easy generation of vortex-induced vibration under the action of wind load. Vortex-induced vibration is amplitude limiting vibration, destructive influence is less generated on a structure, the vortex-induced vibration influences the comfort of a vehicle and pedestrians, the steel structure is more prone to fatigue, the durability of the steel structure is influenced, and different limiting requirements are met by domestic and foreign specifications on the vortex-induced vibration.
The existing mass frequency modulation damper system is a system consisting of a mass block, a spring and a liquid viscous damper, the natural vibration frequency of the system is the same as the frequency of the structure resonance, when the structure is vibrated by the motion of people and the vibration tends to be strengthened, the TMD system provides a counter force for the main structure through self vibration, hinders the vibration of the main structure, consumes energy through the energy absorption of the damper during self vibration, thereby achieving the function of controlling vibration, the TMD system is a vibration system consisting of a spring, a damper and a mass block, the TMD for restraining the steel box girder has smaller frequency, the compression amount or the elongation amount of the spring adopting the conventional structure is large, however, a large number of extension springs or compression springs are usually adopted, and the single TMD is high in cost, large in size and inconvenient and complicated in equipment installation due to the dependence on the large number of extension springs.
Therefore, it is necessary to provide a new lever TMD device with amplified mass effect and spring rate to solve the above technical problems.
Disclosure of Invention
The invention provides a novel lever TMD device with amplification mass effect and spring stiffness, which solves the problems of high manufacturing cost, large volume, inconvenient and complicated equipment installation of a single TMD.
In order to solve the technical problems, the novel lever TMD device with the mass amplification effect and the spring stiffness comprises a base, wherein a mass block rotating shaft is arranged on one side of the top of the base, a mass block cantilever is hinged to the mass block rotating shaft, a first spring base is arranged on one side of the bottom of the mass block cantilever, a second spring base is arranged on one side of the top of the base, a spring is arranged between the bottom of the first spring base and the opposite side of the second spring base, a damper is fixedly connected to one side of the top of the base, an adjustable mass block is fixedly connected to the top end of the damper, a fixed mass block cantilever bolt is arranged on the adjustable mass block, and the fixed mass block cantilever bolt is fixedly connected with the mass block cantilever.
Preferably, the top end of the damper is located at the center of gravity of the adjustable mass.
Preferably, one side of the top of the base is fixedly connected with an anti-collision block, and the anti-collision block is positioned under the adjustable mass block.
Preferably, the springs are located between the mass rotating shaft and the center of gravity of the adjustable mass, and the number of the springs is two.
Preferably, the equal fixedly connected with connecting block in one side of quality piece cantilever bottom and one side at base top, two one side of connecting block all rotates and is connected with the lead screw, two the equal threaded connection in surface of lead screw has the screw block, two one side that the screw block departs from respectively with the bottom of quality piece cantilever and the top sliding connection of base, two one side that the screw block is relative respectively with first spring base and second spring base fixed connection.
Preferably, one side of the surface of each of the two screw rods is sleeved with a stabilizing block, the separated side of each of the two stabilizing blocks is fixedly connected with the bottom of the mass block cantilever and the base respectively, and one end of each of the two screw rods is fixedly connected with a rotating handle.
Compared with the related art, the novel lever TMD device with the amplified mass effect and the spring stiffness has the following beneficial effects:
the invention provides a novel lever TMD device with mass amplification effect and spring stiffness, which changes the vibration working mode of TMD from vertical vibration of a mass block spring into adjustable mass block rotating vibration around a shaft, wherein the spring is arranged at a proper position between the adjustable mass block and a mass block rotating shaft; the mass effect of the adjustable mass block is amplified by adjusting the position of the spring, the bearing capacity and rigidity of the spring are effectively amplified on the basis of not changing the traditional TMD frequency, the structure effectively avoids the limitation that the rigidity and the bearing capacity of the common cylindrical compression spring cannot meet the expected frequency and rigidity, the whole device is easy to implement and is relatively compact, and the manufacturing cost is relatively low.
Drawings
FIG. 1 is a schematic diagram of a first embodiment of a novel lever TMD device with amplified mass effect and spring rate according to the present invention;
FIG. 2 is a schematic left side view of the base shown in FIG. 1;
FIG. 3 is a right side elevational view of the base shown in FIG. 1;
FIG. 4 is a schematic top view of the base shown in FIG. 1;
FIG. 5 is a schematic diagram of a second embodiment of the novel lever TMD device with amplified mass effect and spring rate according to the present invention.
Reference numbers in the figures: 1. the mass block type vibration damper comprises a base, 2, a mass block rotating shaft, 3, a mass block cantilever, 4, a first spring base, 5, a second spring base, 6, a spring, 7, an anti-collision block, 8, a damper, 9, an adjustable mass block, 10, a fixed mass block cantilever bolt, 11, a connecting block, 12, a screw rod, 13, a thread block, 14, a stabilizing block, 15 and a rotating handle.
Detailed Description
The invention is further described with reference to the following figures and embodiments.
Please refer to fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5 in combination, wherein fig. 1 is a schematic structural diagram of a first embodiment of a novel lever TMD device with amplified mass effect and spring stiffness according to the present invention; FIG. 2 is a schematic left side view of the base shown in FIG. 1; FIG. 3 is a right side elevational view of the base shown in FIG. 1; FIG. 4 is a schematic top view of the base shown in FIG. 1; FIG. 5 is a schematic diagram of a second embodiment of the novel lever TMD device with amplified mass effect and spring rate according to the present invention.
First embodiment
Referring to fig. 1-4, in a first embodiment of the present invention, a novel lever TMD device with an amplification mass effect and spring stiffness comprises a base 1, a mass rotating shaft 2 is disposed on one side of the top of the base 1, a mass cantilever 3 is hinged on the mass rotating shaft 2, a first spring base 4 is disposed on one side of the bottom of the mass cantilever 3, a second spring base 5 is disposed on one side of the top of the base 1, a spring 6 is disposed between the bottom of the first spring base 4 and the side opposite to the second spring base 5, the positions of the first spring base 4 and the second spring base 5 can be adjusted, a damper 8 is fixedly connected to one side of the top of the base 1, an adjustable mass 9 is fixedly connected to the top of the damper 8, a fixed mass cantilever bolt 10 is disposed on the adjustable mass 9, the fixed mass cantilever bolt 10 is fixedly connected with the mass cantilever 3.
The top end of the damper 8 is located at the center of gravity of the adjustable mass 9.
One side at the top of base 1 is fixedly connected with anticollision piece 7, anticollision piece 7 is located adjustable quality piece 9 under.
The springs 6 are positioned between the mass rotating shaft 2 and the gravity center of the adjustable mass 9, and the number of the springs 6 is two.
The working principle of the novel lever TMD device with the amplification mass effect and the spring stiffness provided by the invention is as follows:
the adjustable mass block 9 is hinged with the mass block rotating shaft 2 through the mass block cantilever 3, the adjustable mass block 9 is connected with the damper 8, the spring 6 is arranged at a proper position between the adjustable mass block 9 and the mass block rotating shaft 2, when the structure vibrates, the adjustable mass block 9 rotates around a shaft to drive the damper 8 to consume energy, and the spring is compressed by larger mass due to the lever effect and reaches the expected vibration frequency.
Compared with the related art, the novel lever TMD device with the amplified mass effect and the spring stiffness has the following beneficial effects:
the vibration working mode of the TMD is changed from vertical vibration of a mass block spring into axial rotation vibration of an adjustable mass block 9, and a spring 6 is arranged at a proper position between the adjustable mass block 9 and a mass block rotating shaft 2; the mass effect of the adjustable mass block 6 is amplified by adjusting the position of the spring, the bearing capacity and rigidity of the spring 6 are effectively amplified on the basis of not changing the traditional TMD frequency, the structure effectively avoids the limitation that the rigidity and the bearing capacity of a common cylindrical compression spring cannot meet the expected frequency and rigidity, the whole device is easy to manufacture and is relatively compact, and the manufacturing cost is relatively low.
Second embodiment
Referring to fig. 5, based on the novel lever TMD device with amplified mass effect and spring stiffness provided by the first embodiment of the present invention and the novel lever TMD device with amplified mass effect and spring stiffness provided by the second embodiment of the present invention, the difference is that one side of the bottom of the mass cantilever 3 and one side of the top of the base 1 are both fixedly connected with a connecting block 11, one side of each of the two connecting blocks 11 is rotatably connected with a lead screw 12, the surface of each of the two lead screws 12 is screwed with a threaded block 13, the separated side of each of the two threaded blocks 13 is respectively slidably connected with the bottom of the mass cantilever 3 and the top of the base 1, and the opposite side of each of the two threaded blocks 13 is respectively fixedly connected with the first spring base 4 and the second spring base 5.
Two the cover of 12 surperficial one side of lead screw is equipped with stable piece 14, two one side that stable piece 14 departed from respectively with the bottom and the 1 fixed connection of base of quality piece cantilever 3, two the one end fixedly connected with turning handle 15 of lead screw 12 rotates lead screw 12 through turning handle 15, and lead screw 12 drives the screw thread piece 13 and removes, and two screw thread pieces 13 drive first spring base 4 and the removal of second spring base 5 respectively to adjusting spring 6's position of use, easy operation is practical, is favorable to extensively using widely.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (6)
1. A novel lever TMD device with mass amplification effect and spring stiffness is characterized by comprising a base (1), a mass block rotating shaft (2) is arranged on one side of the top of the base (1), a mass block cantilever (3) is hinged on the mass block rotating shaft (2), a first spring base (4) is arranged on one side of the bottom of the mass block cantilever (3), a second spring base (5) is arranged on one side of the top of the base (1), a spring (6) is arranged between the bottom of the first spring base (4) and the side opposite to the second spring base (5), a damper (8) is fixedly connected to one side of the top of the base (1), an adjustable mass block (9) is fixedly connected to the top of the damper (8), and a mass block fixing cantilever bolt (10) is arranged on the adjustable mass block (9), the fixed mass block cantilever bolt (10) is fixedly connected with the mass block cantilever (3).
2. The new lever TMD device with amplified mass effect and spring rate according to claim 1, characterized by the fact that the top end of the damper (8) is located at the center of gravity of the adjustable mass (9).
3. The new lever TMD device with amplified mass effect and spring rate according to claim 1, characterized in that an anti-collision block (7) is fixedly connected to one side of the top of the base (1), the anti-collision block (7) is located right below the adjustable mass block (9).
4. The new lever TMD device with amplified mass effect and spring rate according to claim 1, characterized in that the spring (6) is located between the mass rotation axis (2) and the center of gravity of the adjustable mass (9), the number of the springs (6) being two.
5. The novel lever TMD device with amplified mass effect and spring stiffness as claimed in claim 1, wherein one side of the bottom of the mass cantilever (3) and one side of the top of the base (1) are both fixedly connected with connecting blocks (11), one side of each of the two connecting blocks (11) is rotatably connected with a screw rod (12), the surface of each of the two screw rods (12) is both in threaded connection with a threaded block (13), the side of each of the two threaded blocks (13) away is respectively in sliding connection with the bottom of the mass cantilever (3) and the top of the base (1), and the side of each of the two threaded blocks (13) opposite is respectively fixedly connected with the first spring base (4) and the second spring base (5).
6. The novel lever TMD device with amplified mass effect and spring stiffness as claimed in claim 5, wherein a stabilizing block (14) is sleeved on one side of the surface of the two lead screws (12), the side of the two stabilizing blocks (14) away from each other is fixedly connected with the bottom of the mass cantilever (3) and the base (1), and a rotating handle (15) is fixedly connected with one end of the two lead screws (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010050345.3A CN113136787A (en) | 2020-01-17 | 2020-01-17 | Novel lever TMD device with amplification mass effect and spring stiffness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010050345.3A CN113136787A (en) | 2020-01-17 | 2020-01-17 | Novel lever TMD device with amplification mass effect and spring stiffness |
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| Publication Number | Publication Date |
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| CN113136787A true CN113136787A (en) | 2021-07-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010050345.3A Pending CN113136787A (en) | 2020-01-17 | 2020-01-17 | Novel lever TMD device with amplification mass effect and spring stiffness |
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004301284A (en) * | 2003-03-31 | 2004-10-28 | Yamashita Rubber Co Ltd | Self-tuning tuned device |
| JP2009052687A (en) * | 2007-08-28 | 2009-03-12 | Tokai Rubber Ind Ltd | Damping device |
| CN101709567A (en) * | 2009-10-14 | 2010-05-19 | 中铁大桥局集团武汉桥梁科学研究院有限公司 | Mass damping device of rigid connection space lever of stay cable |
| CN102425247A (en) * | 2011-10-19 | 2012-04-25 | 沈阳建筑大学 | Three-dimensional tuned mass damper |
| CN203049821U (en) * | 2012-12-05 | 2013-07-10 | 上海英谷桥梁科技有限公司 | Tuned mass damping device without guide rail |
| TW201339451A (en) * | 2012-03-20 | 2013-10-01 | Univ Nat Taiwan | A vibration damper and a method for operating the vibration damper |
| CN103758028A (en) * | 2014-01-07 | 2014-04-30 | 中铁大桥局集团武汉桥梁科学研究院有限公司 | Low-frequency mass tuning and vibration-damping device and regulating method for same |
| CN104565192A (en) * | 2015-01-12 | 2015-04-29 | 华北水利水电大学 | Bran finisher double-turned mass dampers, combined vibration reduction and isolation device and implementation method |
| CN108729569A (en) * | 2018-06-26 | 2018-11-02 | 山东大学 | A kind of multidimensional whirlpool spring and helical spring combined type tune vibration absorber |
| CN208448869U (en) * | 2018-07-02 | 2019-02-01 | 蚌埠威诺过滤器有限公司 | Vibration dust remover is used in a kind of maintenance of air cleaner |
| CN209179232U (en) * | 2018-10-23 | 2019-07-30 | 上海路博减振科技股份有限公司 | A kind of new type of continuous adjusts the tuned mass damper of rigidity |
-
2020
- 2020-01-17 CN CN202010050345.3A patent/CN113136787A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004301284A (en) * | 2003-03-31 | 2004-10-28 | Yamashita Rubber Co Ltd | Self-tuning tuned device |
| JP2009052687A (en) * | 2007-08-28 | 2009-03-12 | Tokai Rubber Ind Ltd | Damping device |
| CN101709567A (en) * | 2009-10-14 | 2010-05-19 | 中铁大桥局集团武汉桥梁科学研究院有限公司 | Mass damping device of rigid connection space lever of stay cable |
| CN102425247A (en) * | 2011-10-19 | 2012-04-25 | 沈阳建筑大学 | Three-dimensional tuned mass damper |
| TW201339451A (en) * | 2012-03-20 | 2013-10-01 | Univ Nat Taiwan | A vibration damper and a method for operating the vibration damper |
| CN203049821U (en) * | 2012-12-05 | 2013-07-10 | 上海英谷桥梁科技有限公司 | Tuned mass damping device without guide rail |
| CN103758028A (en) * | 2014-01-07 | 2014-04-30 | 中铁大桥局集团武汉桥梁科学研究院有限公司 | Low-frequency mass tuning and vibration-damping device and regulating method for same |
| CN104565192A (en) * | 2015-01-12 | 2015-04-29 | 华北水利水电大学 | Bran finisher double-turned mass dampers, combined vibration reduction and isolation device and implementation method |
| CN108729569A (en) * | 2018-06-26 | 2018-11-02 | 山东大学 | A kind of multidimensional whirlpool spring and helical spring combined type tune vibration absorber |
| CN208448869U (en) * | 2018-07-02 | 2019-02-01 | 蚌埠威诺过滤器有限公司 | Vibration dust remover is used in a kind of maintenance of air cleaner |
| CN209179232U (en) * | 2018-10-23 | 2019-07-30 | 上海路博减振科技股份有限公司 | A kind of new type of continuous adjusts the tuned mass damper of rigidity |
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Application publication date: 20210720 |
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