CN217840401U - Tuned mass damper with frequency convenient to adjust - Google Patents
Tuned mass damper with frequency convenient to adjust Download PDFInfo
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- CN217840401U CN217840401U CN202221323701.5U CN202221323701U CN217840401U CN 217840401 U CN217840401 U CN 217840401U CN 202221323701 U CN202221323701 U CN 202221323701U CN 217840401 U CN217840401 U CN 217840401U
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Abstract
The utility model discloses a harmonious mass damper of frequency convenient to adjust, it includes: the support, adjust the pole, suspend piece and quality piece in midair, wherein, the regulation hole of a plurality of difference in height has been seted up on the support, it can dismantle with the support and be connected to adjust the pole through adjusting the hole, the quality piece is located the below of adjusting the hole and suspends in midair on adjusting the pole through suspending in midair, the height that hangs of quality piece is unchangeable, through adjusting the pole switching connection in the regulation hole of co-altitude not, and the replacement uses the piece that suspends in midair that corresponds length to connect the quality piece and adjust the pole, realize the change of the length that hangs of quality piece, and then realize the regulation of attenuator natural frequency. The utility model discloses simple structure, its natural frequency is more accurate and adjustable, and regulatory function is more directly perceived, convenient, and damping efficiency is higher.
Description
Technical Field
The utility model relates to a structure damping technical field, in particular to harmonious mass damper of frequency convenient to adjust.
Background
High-rise structure refers to a structure with a large height and a relatively small cross section, and the main basis of structural design is horizontal load (especially wind load). The structure can be divided into a self-standing tower structure and a guyed mast structure according to the structure form, and the structure is typically represented by a base station communication tower and a wind power generation tower. The towering structure is high in height, relatively small in cross section and relatively small in lateral rigidity, belongs to a flexible structure system, is easy to generate large deformation under the static force (average wind) action of wind load, is low in natural frequency, is easy to generate resonance under the action of wind load power (pulsating wind), and has important significance for reducing towering structure vibration and ensuring safety of the towering structure at present with high demands on communication technology and new energy.
The main technology for solving the problem of the resonance of the high-rise structure is a Tuned Mass Damper (TMD), the traditional Tuned Mass Damper (TMD) is sensitive to frequency and sensitivity, whether the Tuned Mass Damper (TMD) can effectively play a role depends on whether the Tuned Mass Damper (TMD) is consistent with the natural frequency of the structure, although the frequency domain of the Tuned Mass Damper (TMD) can be widened by increasing the damping, the range is limited, a good effect is achieved on the frequency within +/-10% of the design frequency, and the effect is difficult to effectively play beyond the range.
In the design and installation process of the Tuned Mass Damper (TMD), the frequency of the tuned mass damper is generally simulated and calculated through simulation software, but due to the fact that the stiffness of the towering structure is small, the influence of the weight of an actually installed component on the frequency of the actually installed component is large, accurate simulation cannot be conducted in the software, errors often exist between a simulation result and the actually measured frequency of the structure, and after the errors exceed 10%, the Tuned Mass Damper (TMD) cannot play a vibration damping effect easily.
Therefore, a Tuned Mass Damper (TMD) having a frequency that is easily adjustable and has a significant damping effect is urgently required.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a frequency is convenient for adjust, and the better frequency of damping effect is convenient for adjust harmonious mass damper.
In order to achieve the above purpose, the utility model provides a technical scheme does:
a tuned mass damper with frequency tuning, comprising: support, regulation pole, quality piece and suspension member. The support is provided with a plurality of adjusting holes with different heights, the adjusting rod is detachably connected with the support through the adjusting holes, the mass block is located below the adjusting holes, and the mass block is suspended on the adjusting rod by the suspension piece. The hanging height of the mass block is unchanged, and the adjusting rod can be connected to the adjusting holes at different heights in a switching mode to change the hanging length of the mass block.
Further, the suspension piece includes: hang and locate rings on adjusting the pole to and one end with rings connect and the other end with the quality piece connect the jib.
Furthermore, the suspender comprises a plurality of rod sections which are detachably connected end to end, and the length of each rod section is equal to the hole distance of two adjacent adjusting holes corresponding to the rod section.
Furthermore, the one end of jib with the quality piece can be dismantled and be connected, the other end with rings can be dismantled and be connected, can dismantle the connection through the sleeve between the pole section.
Furthermore, the adjusting rod is an adjusting screw rod, the adjusting screw rod penetrates through the adjusting hole and is in threaded connection with a fixing nut matched with the support, so that the movement of the adjusting screw rod is limited.
Further, the bracket includes: the left side board and the right side board that parallel arrangement, and be fixed in the left side board with backup pad between the right side board, the left side board with the right side board symmetry has seted up a plurality ofly the regulation hole, adjusting screw's one end wear to locate in the regulation hole of left side board, the other end wears to locate in the regulation hole of right side board.
Further, the bracket further comprises: the limiting cushion is arranged on the inner wall of the support, and the mounting seat is arranged on the outer wall of the support.
Furthermore, the bracket is provided with frequency marks corresponding to the adjusting holes near the adjusting holes.
Further, the number of the adjusting holes and the positions of the adjusting holes are determined according to the natural frequency of the main structure to be damped.
Adopt above-mentioned technical scheme, the beneficial effects of the utility model are that: the utility model discloses a harmonious mass damper that frequency is convenient for adjust simple structure, the installation is convenient, the precision is high, and its quality piece suspends in midair highly unchangeably, through installing the regulation pole at the regulation hole of co-altitude, realizes that the quality piece suspends the change of length in midair, and every regulation hole corresponds a natural frequency, and its regulatory function is directly perceived, convenient, is applicable to the various structure of towering that produces great vibration under wind load, compares with current harmonious mass damper, the utility model discloses natural frequency is more accurate and adjustable, and damping efficiency is higher, and when the major structure because the quality changes, when the frequency changes, can adjust thereupon, and the application scope is wider.
Drawings
Fig. 1 is a schematic perspective view of a preferred embodiment.
Fig. 2 is a cross-sectional schematic view of the front view of fig. 1.
Fig. 3 is a side view of fig. 1.
Wherein: 1. the device comprises a support, 11, a left side plate, 12, a right side plate, 13, a support plate, 14, a limiting pad, 15, a mounting seat, 2, an adjusting hole, 3, an adjusting rod, 4, a mass block, 5, a suspension piece, 51, a lifting ring, 52, a lifting rod, 521, a rod section, 522, a sleeve, 6, a frequency identifier and 7, and a fixing nut.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the following detailed description.
As shown in fig. 1-3, the utility model discloses a frequency is convenient for harmonious mass damper who adjusts, it includes: support 1, regulation pole 3, suspend in midair 5 and quality piece 4, wherein, set up a plurality of height difference's regulation hole 2 on the support 1, adjust pole 3 detachably and connect in adjusting hole 2, suspend in midair 5 and will be located the quality piece 4 of adjusting hole 2 below and suspend in midair on adjusting pole 3.
The utility model discloses a quality piece 4 rotates around adjusting pole 3 through hanging in midair 5, and quality piece 4 hang highly unchangeably, through adjusting pole 3 and installing in the regulation hole 2 of co-altitude not to the replacement uses the piece 5 that hangs in midair that corresponds length to connect quality piece 4 and adjust pole 3, makes quality piece 4 hang the length change, and then the utility model discloses a frequency modulation of attenuator, rather than change its length that hangs through the height that hangs of the quality piece 4 that adjusts the quality heavier, makes the utility model discloses an adjust the degree of difficulty and reduce relatively. For convenience, the mass 4 is generally disposed at a lower position. Furthermore, suspend in midair at quality piece 4 under the unchangeable prerequisite of height basically, the utility model discloses an every regulation hole 2 all corresponds a natural frequency, and it both has simple structure, and it is convenient to install, and the advantage that the precision is high has regulatory function directly perceived, convenient again, and the regulation frequency is more accurate, the higher advantage of damping efficiency.
Particularly, since the length of the suspension member 5 changes with the change of the suspension length of the mass block 4, a plurality of suspension members 5 with corresponding lengths need to be prepared for replacement, which is troublesome, and for the convenience of adjustment, in a preferred embodiment of the present invention, the suspension member 5 includes a hanging ring 51 and a hanging rod 52, the hanging ring 51 is hung on the adjusting rod 3, and the hanging rod 52 connects the mass block 4 and the hanging ring 51. The hanger bar 52 comprises a plurality of bar segments 521 detachably connected end to end, and the length adjustment of the hanger 5 is realized by increasing or decreasing the bar segments 521. The number and length of the rod segments 521 are determined according to the hole pitch of two adjacent adjustment holes 2 of all the adjustment holes 2. The length of each rod section 521 is equal to the hole distance between two corresponding adjacent adjusting holes 2, for example, the length a of a certain rod section 521 in fig. 2 is equal to the length b of two corresponding adjacent adjusting holes 2, so as to ensure the consistency of the length of the suspension rod 52 and the suspension height and the convenience of adjusting the length of the suspension rod 52. The rod segments 521 are connected and combined through a sleeve 522, one end of the suspension rod 52 can be detachably connected with the mass block 4 through the sleeve 522, and the other end can be detachably connected with the hanging ring 51 through the sleeve 522. Due to the large number of pole segments 521, the pole segments 521 can be numbered sequentially for ease of assembly and to avoid mismatch between the length of the assembled boom 52 and the suspension length of the mass 4.
In order to determine the natural frequency corresponding to each adjusting hole 2 more intuitively, the frequency identification 6 corresponding to the adjusting hole 2 is arranged on the wall of the bracket 1 near the adjusting hole 2 in the embodiment.
The adjusting rod 3 of this embodiment is an adjusting screw, the adjusting rod 3 penetrates through the adjusting hole 2 and is in threaded connection with a fixing nut 7, and the adjusting screw is limited to move through the matching of the fixing nut 7 and the support 1, so that the adjusting screw can be detached from the fixing support 1. Specifically, the stent 1 includes: a left side plate 11 and a right side plate 12 which are arranged in parallel, a supporting plate 13 fixed between the two side plates, a limiting pad 14 arranged on the inner wall of the bracket 1 and a mounting seat 15 arranged on the outer wall of the bracket 1. Wherein, the bracket 1 can be fixed on the towering structure through the mounting seat 15, and the limit pad 14 can prevent the mass block 4 from colliding with the bracket 1. The left side plate 11 and the right side plate 12 are symmetrically provided with the adjusting holes 2 with different heights, the adjusting screw rod is arranged between the two side plates in a penetrating mode, one end of the adjusting screw rod penetrates out of the adjusting hole 2 of the left side plate 11 and is provided with a fixing nut 7, and the other end of the adjusting screw rod penetrates out of the adjusting hole 2 of the right side plate 12 and is provided with a fixing nut 7.
It should be noted that the number of the adjustment holes 2 and the position of each adjustment hole 2 are determined according to the natural frequency of the main structure to be damped (i.e., the towering structure). The utility model discloses a attenuator is the harmonious mass damper of pendulum-Type (TMD), and its natural frequency accessible is designed by following formula:
wherein f is the design frequency of the tuned mass damper, L is the suspension length of the mass block 4, and g is the gravitational acceleration, which is 9.8m/s 2 And pi is the circumferential ratio, which takes on a value of 3.14.
When the natural frequency of the TMD is consistent with the natural frequency of the towering structure, the TMD can play a role. For example, a towering structure such as a base station communication tower typically has a height of 20m to 40m and a natural frequency in the range of 0.5 to 1.5Hz, where the natural frequency of the tuned mass damper corresponds to the suspension length of the mass 4 as follows:
after the suspension height of the mass block 4 is determined, according to the suspension length, adjusting holes 2 are formed in corresponding positions on the support 1, and corresponding natural frequencies are marked. In the above table, since the difference between the suspension lengths corresponding to the adjacent two natural frequencies, that is, the hole pitch between the adjacent two adjustment holes 2, the length of each segment 521 of the suspension lever 52 can be determined from the difference between the suspension lengths.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A tuned mass damper with frequency tuning, comprising:
the bracket is provided with a plurality of adjusting holes with different heights;
the adjusting rod is detachably connected with the bracket through the adjusting hole;
the mass block is positioned below the adjusting hole;
the suspension piece suspends the mass block on the adjusting rod;
the hanging height of the mass block is unchanged, and the adjusting rod can be connected to the adjusting holes at different heights in a switching mode to change the hanging length of the mass block.
2. The tuned mass damper with frequency tuning of claim 1, wherein said suspension comprises:
the lifting ring is hung on the adjusting rod;
one end of the suspension rod is connected with the suspension ring, and the other end of the suspension rod is connected with the mass block.
3. The tuned mass damper with frequency adjustment as claimed in claim 2, wherein said suspension rod comprises a plurality of rod segments removably connected end to end; the length of each rod section is equal to the hole distance of two adjacent adjusting holes corresponding to the rod section.
4. The tuned mass damper with frequency adjustment for ease of adjustment according to claim 3, wherein said suspension rod is removably connected at one end to said mass and at the other end to said suspension ring; the rod sections are detachably connected through sleeves.
5. The tuned mass damper with frequency adjustment as claimed in claim 4, wherein said adjustment rod is an adjustment screw passing through said adjustment hole and threadedly engaged with a retaining nut engaged with said bracket to limit movement of said adjustment screw.
6. The tuned mass damper with frequency tuning of claim 5, wherein said mount comprises: the left side board with the right side board symmetry has seted up a plurality ofly the regulation hole, adjusting screw's one end wear to locate in the regulation hole of left side board, the other end wears to locate in the regulation hole of right side board.
7. The tuned mass damper with frequency tuning of claim 6, wherein said mount further comprises: the limiting cushion is arranged on the inner wall of the support, and the mounting seat is arranged on the outer wall of the support.
8. The tuned mass damper with frequency adjustment capability as claimed in any one of claims 1 to 7, wherein said support has a frequency identification corresponding to each of said adjustment holes in the vicinity of said adjustment hole.
9. The tuned mass damper with frequency easy to adjust as claimed in claim 8, wherein the number of said adjustment holes and the position of each said adjustment hole are determined according to the natural frequency of the main structure to be damped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221323701.5U CN217840401U (en) | 2022-05-30 | 2022-05-30 | Tuned mass damper with frequency convenient to adjust |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221323701.5U CN217840401U (en) | 2022-05-30 | 2022-05-30 | Tuned mass damper with frequency convenient to adjust |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217840401U true CN217840401U (en) | 2022-11-18 |
Family
ID=84021741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221323701.5U Active CN217840401U (en) | 2022-05-30 | 2022-05-30 | Tuned mass damper with frequency convenient to adjust |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217840401U (en) |
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2022
- 2022-05-30 CN CN202221323701.5U patent/CN217840401U/en active Active
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