CN1840794A - Dynamic vibration absorption and energy consumption apparatus for reducing wind vibration response of high tower structure - Google Patents
Dynamic vibration absorption and energy consumption apparatus for reducing wind vibration response of high tower structure Download PDFInfo
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Abstract
The invention discloses a dynamic shock-absorbing and dissipating energy device of reducing high tower structure wind vibration response, which comprises the following parts: steel pendulum tie1 whose one end hangs on the structure6, another end hangs with mass block2; the block2 can be used for boring iron shot or casting aluminum steel ball; the pendulum tie1 crosses the hole; the antifatigue damage device is installed in suspension construction; the pendulum tie1 crosses cylindrical compression spring31, whose both extremities of perforated bearing plate32 are clamped by fastener33; the upper, lower end of pendulum tie on mass block2 install antifatigue damage device3; the periphery of mass block is fixed with bump amortization dissipating energy component rubber ring4 whose amortization is more than 5%; There is a protection and repair suspender5 between structure6 and mass block. The control structure is effective, simple and reliable, which is installed in the mast cartridge for vibration damping control the mast structure shacking; the invention improves the control effect, which avoids the big and complicated device.
Description
Technical field
The present invention relates to Structural Engineering, field of vibration control, especially relate to a kind of dynamic absorber and energy-dissipating device that reduces wind vibration response of high tower structure.
Background technology
Structural vibration control is nearly structural seismic wind resistance new way of rising during the last ten years.Through unremitting effort for many years, structural vibration control is used in theory research and engineering and has all been obtained bigger progress aspect two.What have milestone significance is, on the basis of a large amount of theoretical works, National Natural Science Foundation of China set up key project (approval number: 59238160) " antidetonation of building structure and wind resistance control research " in 1992, carry out the application study of structural control system on Liang Ta (Oriental Pearl TV Tower, a Shanghai and Nanjing TV transmission tower) bridge (Jiangyin Yangtze Bridge), this structure control research that indicates China is attached most importance to the application study transition of attaching most importance to by theoretical research.Coming years, Chinese scholar is applied in the continuous practice of engineering in the structure control technology, and the application road of the structure control of suitable China's national situation has been walked out in summing up experience and lesson.Base isolation, passive energy dissipation have progressed into to be used and the popularization stage, and includes in the national standard " seismic design provision in building code (GB50011-2001) ".There are relatively large base isolation building and passive energy dissipation building to use in China different regions.From these example application, technical tactics of these control buildings make every effort to effectively, simple, economical, be convenient to realization, its experience is promoted.Tuning quality damping (TMD) vibration control apparatus as Passive Control, its control strategy is for using minor structure and the purpose that is reached dynamic absorber by the resonance of control structure principal mode, and use the power consumption damping material or install the vibrational energy that consumes minor structure, in continuous main structure vibrational energy and the continuous purpose that reaches the response of reduction main structure in the minor structure vibrational energy that consumes of absorbing.The structure control application study sub-project research process of Oriental Pearl TV Tower, Shanghai is carrying out a large amount of research on the computational methods He on the TMD control device scheme, has solved the key technical problem that control device is realized in the various application.Nanjing TV transmission tower project and American scholar T .T.Soong have cooperated to carry out the research of main passive ATMD mixed control apparatus.These results of study make China's structure control research use to engineering and have stepped into major step, and its achievement has been established certain research basis for application study from now on.From research project, the research contents that the state natural sciences fund key project sets has been finished in these researchs with flying colors, reaches the expection goal in research.But there are many experiences and lessons to be worth drawing with regard to control device problem of implementation in the project.At first, these researchs fail really to catch the response of TV Tower Structures to concentrate on the characteristics at mast position, the structure control strategy is the response of the full tower of control, and structure from bottom to top, there is repeatedly the rigidity sudden change, the local acknowledgement at mast position responds much larger than body of the tower, and the control difficulty is increased, and is too huge for reaching certain control effect control device; Its two, control device is installed in the high building, control action is at the root of mast, and is very little to mast structure response control effect; Its three, control device aspires after perfection, and makes control device too complicated, technical requirements is too high, is difficult to realize.Initiatively AMD, passive TMD and half active and the existing at home and abroad more research of mixing ATMD control device, and be applied on the super highrise building abroad.Install two cover TMD devices as the Chinese cock mansion of the U.S., control structure second and the response of the 4th vibration shape have solved the engineering problem that wind is bestirred oneself and come off with building glass curtain wall down; The passive ATMD structure control of two cover two direction masters device is installed on the Dowa Kasai Phoenix Tower of Japan, and Passive Control TMD adopts neoprene bearing to adopt the force application mechanism of hydraulic drive conduct as support and spring-damp system, ACTIVE CONTROL AMD; The HerbisOsaka Tower of Japan utilizes the inertia mass of roof fire water box as AMD, with the fire water box suspention, uses motor screw as drive unit, and solves the connectivity problem of water pipe with being flexible coupling; Collapsible suspention quality TMD structure control device has been adopted in the ソ ん ラ ケ-ト ヮ-north of Japan, and it is longer to have solved structural cycle, the problem that floor height is limited; The Toronto TV transmission tower has also been installed TMD structure control device on high building.At present at home and abroad, TMD or AMD structure control device are used in tens building building structure, but the popularization and application of also far being far from being, domestic application is just still less.To the existing many achievements in research of the research of TMD or AMD, but all be confined to optimize with algorithm on research, the application technical research of control device and corresponding control result's quantitative analysis is still not enough, the validity of control device, safety and the then rarer report of monitoring reliability research.Control device can popularization and application also need be done many work in structure." effective, simple, economic, reliable " of control device is the important technique measure that the structure control technology is used and promoted.
Summary of the invention
Purpose of the present invention just provides a kind of dynamic absorber and energy-dissipating device that reduces wind vibration response of high tower structure, and it can be accomplished effectively, simple, economy, reliable.
For achieving the above object, dynamic absorber and the energy-dissipating device that reduces wind vibration response of high tower structure of the present invention is called for short control device, comprise the steel wire pendulum rope that an end hangs structurally, other end suspention has mass, it is characterized in that: the antifatigue breaking plant is housed in the described suspended structure, and its structure is: the pendulum rope clamps with securing member after passing the perforate backing plate at cylinder-shaped compression spring and its two ends.
On the basis of the above, the present invention also has various forms:
Described mass is perforation steel ball or cast aluminium steel ball, and the pendulum rope passes therebetween, and it is that upper and lower end all is equipped with the antifatigue breaking plant that mass upper end or lower end are crossed.
Described mass be peripherally equipped with damping ratio greater than 5% damping energy dissipation parts rubber ring.
Described mass is for mast structure, and the mass quality summation of a plurality of control device is greater than 1% of mast vibration shape generalized mass.
Between structure and mass, draw at least one protection and maintenance hoist cable.
Beneficial effect of the present invention:
(1) elasticity that proposes the structure control device is suspended support structure in midair, makes the shared space of support component little, guarantees that the suspention quality has the ability of swinging preferably;
(2) construction measure of linear energy-absorbing of solution structure control device and non-linear power consumption, the validity and the persistence of assurance device operation;
(3) the tired primary structure member antifatigue construction measure of proposition structure control device, the problem of stress concentration of solution member prevents the fatigue failure at the concentrated position of component stress;
(4) control device " effectively, simple, economic, reliable " is a characteristic of the present invention, also is the summary of the experiences and lessons that studies for a long period of time, meets actual demands of engineering, satisfies engineering industry technology condition, has solved engineering problem conscientiously.
(5) control device of the present invention is especially at the characteristics of TV Tower Structures, propose first the structure control device is installed in the mast tube, directly at the control of mast structure vibration carrying out vibration damping, the control effect is greatly improved, avoids former studies that control device is installed in the disadvantage that the structure control device that causes in the high building is too huge, mechanism is too complicated and the control effect is difficult to improve.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention.
Fig. 2 is pendulum Cable Structure schematic diagram.
Fig. 3 is Chinese parasol tree mountain, a Shenzhen television transmitting tower housing structure schematic diagram.
Fig. 4 installs the absolute altitude schematic diagram for embodiment is applied to Chinese parasol tree mountain, Shenzhen television transmitting tower mast structure.
Among the figure: 1 pendulum rope, 2 masses, 3 antifatigue breaking plants, 31 cylinder-shaped compression springs, 32 perforate backing plates, 33 securing members, 4 rubber rings, 5 protection and maintenance hoist cable, 6 structures.
The specific embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
Shown in Figure 2 as Fig. 1, dynamic absorber and the energy-dissipating device that reduces wind vibration response of high tower structure of the present invention is called for short control device, comprise the steel wire pendulum rope 1 that an end is suspended on the structure 6, other end suspention has mass 2, pendulum rope 1 is generally hawser, it supports to adjustable length between the quality barycenter, natural vibration period in order to control and adjusting device, itself and the structure control vibration shape are matched; Mass 2 can be perforation steel ball or cast aluminium steel ball, pendulum rope 1 passes its hole, the size of mass has a direct impact the control effect, and general a plurality of control device quality summations just can reach and control effect (the control effect is about 40%) preferably at 1% o'clock greater than 1% of mast vibration shape generalized mass; Antifatigue breaking plant 3 is housed in the suspended structure, and its structure is: perforate backing plate 32 backs that pendulum rope 1 passes cylinder-shaped compression spring 31 and its two ends clamp with securing member 33; Pendulum Suo Shangdou at the upper and lower end of mass 2 is equipped with antifatigue breaking plant 3; Damping ratio fixedly is equipped with greater than 5% collisional damping power consumption parts rubber ring 4 in the periphery of mass, device with mesomerism in continuous absorbing structure vibrational energy, the device vibration is constantly amplified, final by collision consumer vibrational energy, the device amplitude is reduced rapidly, device is got back to original state, provides the space for next step absorbs vibrational energy, adopts high damping (damping ratio is greater than 5%) rubber to make; Drawn protection and maintenance hoist cable 5 between structure 6 and mass, it is the attached member of device, loses efficacy the back in order to the protective device harm main structure that is unlikely to come off, simultaneously also as device maintenance and main rope replacing at main rope.Single hoist cable supporting capacity should be not less than 1.5 times of mass weight.
Pendulum rope 1 antifatigue safety is the key issue that this control device can be permanently effective and safe.The position that pendulum rope fatiguability destroys is the support end of rope and the upper and lower side connecting portion of rope and mass.Because device rope when swing and collision produces back and forth bending power at above-mentioned position, the pendulum rope will produce fatigue fracture under long-term reciprocating power effect, so the antifatigue structure that the application proposes is important key technology.This device adopts holddown spring, relies on the recovery bounce of spring to bear bending power, reduces the bending power of rope, guarantees the tired safety of bend resistance of rope.
Fig. 3 is applied to Chinese parasol tree mountain, Shenzhen TV transmission tower mast structure schematic diagram for embodiment.
198.000 meters of Chinese parasol tree mountain, Shenzhen television transmitting tower overall heights, owing to build on the Chinese parasol tree mountain, tower ± 0.000 meter absolute altitude is equivalent to 649.600 meters of absolute elevations, is the high mountain tower mast structure.The transmission of television tower structure is divided into two sections of body of the tower, mast structures.The mast length overall is 120.500 meters, compares for the longest with present domestic television tower.Vertically there are 6 rigidity sudden changes respectively in structure at absolute altitude 80.500,97.000,146.900,163.700,175.300,188.000 places, structural response concentrates on mast top, the mast response is bigger, a plurality of vibration shape participation structure wind vibration responses, and structure wind sensitiveness is stronger.The Shenzhen is positioned on the southern China sea water front, attacked by typhoon, and the wind reference pressure of design characteristi cvalue o fwindload is respectively 0.75KN/m when 50 years recurrence intervals and 100 years
2, 0.90KN/m
2, wind load causes that structural response transfinites unavoidably.
The designing unit of Chinese parasol tree mountain, Shenzhen television transmitting tower has carried out comparatively careful computational analysis and design to this structure.Design result is secure to the structural entity safety.But the summit maximum displacement of design mast structure is 2.7351 meters (50 years wind load recurrence intervals) and 3.2325 meters (100 years wind load recurrence intervals), exceeds national standard " GBJ135-90 (GBJ135-90) " 2.0.8 bar regulation more (exceeding 31.5% and 55.4% respectively).The method that reduces the response of structure top displacement has two kinds, and a kind of is the structure section that increases mast, improves the rigidity of structure; A kind of is to increase structural damping, improves the structural vibrations energy dissipation capacity.First method is conventional way, can accomplish in general structure.But in this engineering, because the function of use requirement, the mast structure section is restricted, the general requirement that the mast total length will meet broadcasting and TV broadcasts channel, and the ten meters long masts in top are bought by Germany, therefore increase structure section, and improving mast structure rigidity has not had leeway.This engineering is owing to adopt steel work, and the structural damping ratio is 1.00% ~ 3.00%, and structural damping is smaller, means that the ability of structure consumption vibration is little, and the structural vibration decay is slower, and this is to cause a bigger major reason of mast structure vibration.Therefore the damping that improves structure strengthens the structural vibrations energy dissipation capacity, is effective, the economic method that reduces the vibration of this engineering structures.
This project adopts tuning quality damping structure control strategy, the structure control strategy of promptly linear absorbing, non-linear power consumption.Control device constantly absorbs and consumes the vibrational energy of mast structure, reaches and improves the ability that mast structure consumes vibrational energy, finally reaches the purpose that improves structural damping.Control device is installed in the mast tube, does not influence the function of use of mast, and the device that is adopted is simple, effective, and the technical requirements that is proposed is lower, is convenient to use and popularize.According to Calculation results, the structural response of first, second vibration shape of emphasis control structure.Control above-mentioned two vibration shapes response and adopt 4 groups, 3 groups control device (seeing Fig. 3 for details) respectively.Computational analysis shows that the control result can reduce mast dynamic response displacement 67.9%.
TV transmission tower embodies the urban architecture style and features as the important symbol in city.He is bearing city area radio and television reception, emission and communication task again simultaneously, is lifeline engineering, and its structural safety is being carried important social influence and public safety responsibility.Along with radio and television and communication develop to the digitlization direction, higher requirement will be proposed to TV transmission tower.Mast will design longer more originally, and the restriction of the mast amplitude of oscillation is strict more.TV transmission tower is vigorously built in the Chinese large-sized city, and the foreseeable future, along with the development of radio and television services, the newly-built TV transmission tower in small and medium-sized cities has become inevitable, and part big and medium-sized cities TV transmission tower also will be transformed and rebuild former tower according to higher technical requirements.Therefore this patent project will have great social significance and application prospect.
As the tall and slender structure of TV transmission tower, structure generally is made up of body of the tower, mast, and from the body of the tower to the mast, structure has been carried out repeatedly material and cross section conversion, and there is repeatedly the rigidity sudden change in structure, and structural response concentrates on mast top.First natural vibration period of structure is longer, and the wind vibration response of a plurality of vibration shape participation structures belongs to the wind sensitive structure.The beam wind of structure can not be ignored to vibration simultaneously, needs to consider that structure down wind and beam wind are to the coupling that responds." under wind load (standard value) effect, the horizontal movement of tall and slender structure arbitrfary point must not be greater than 1/100 of this terrain clearance according to national standard " GBJ135-90 (GBJ135-90) " 2.0.8 bar regulation.To mast structure, note the relative horizontal movement of interlayer, still must not be greater than 1/100 of this interfloor height." this strictness of control requirement to TV transmission tower and mast structure wind vibration response.The mast displacement is transfinited and can be caused following hidden danger to structural safety and function of use: (1) mast structure is long-term vibration by a relatively large margin under wind action, easily causes structural fatigue to destroy; (2) the mast structure Oscillation Amplitude transfinites, and easily makes the mast structure crippling; (3) because of the antenna swing causes the decay that transmits, influence the launching effect of broadcast television signal; (4) raising causes the structure bottleneck to the systems technology performance.At present because the requirement that DTV transmits, the channel number that the TV transmission tower mast carries is more and more, require newly-built TV transmission tower mast longer, simultaneously the mast cross section be subjected to the restriction of the radio and television emission visual field and coverage rate can not be excessive, the mast top displacement problem that transfinites is all the more outstanding, and the control to the mast structure wind vibration response just seems all the more necessary like this.
This project adopts tuning quality damping structure control strategy, the structure control strategy of promptly linear absorbing, non-linear power consumption.Control device constantly absorbs and consumes the vibrational energy of mast structure, reaches and improves the ability that mast structure consumes vibrational energy, finally reaches the purpose that improves structural damping.Control device is installed in the mast tube, does not influence the function of use of mast, and the device that is adopted is simple, effective, and the technical requirements that is proposed is lower, is convenient to use and popularize.
In addition, industry technology characteristics at engineering, this project adopts at the mast inner core quality single pendulum formation minor structure is set, use resonance principle, when vibration took place under wind action mast structure, quality single pendulum minor structure was subjected to the mast vibration and excitation resonance, absorbed the vibrational energy of mast, rely on the collision of energy-absorbing material in quality single pendulum and the mast simultaneously, consume the vibrational energy of minor structure.Device is the damping that has increased mast structure to the exercising result of structure, and the vibration of mast structure is decayed fast, reaches to reduce the purpose that mast structure vibrates, the swing of reduction antenna causes signal attenuation.The key technology of device design is to determine the resonance parameter of minor structure and the power consumption parameter of definite minor structure.The control device control that this project proposes is effective, and device technique requires low, and it is little to take up room, and mast is relayed function do not have influence.According to Calculation results, in the mast a plurality of control device can be set, the structural response of first, second vibration shape of emphasis control structure.The technology groups of device becomes:
1. the mass mass can be solid steel ball or casting leaded steel ball.The size of its quality has a direct impact the control effect, and general a plurality of control device quality summations just can reach and control effect (the control effect is about 40%) preferably at 1% o'clock greater than 1% of mast vibration shape generalized mass.
2. pendulum rope pendulum rope is generally hawser, and it supports to adjustable length between the quality barycenter, the natural vibration period in order to control and adjusting device, itself and the structure control vibration shape is matched.
The damping energy dissipation part device with mesomerism in continuous absorbing structure vibrational energy, the device vibration is constantly amplified, and is final by collision consumer vibrational energy, and the device amplitude is reduced rapidly, device is got back to original state, provides the space for next step absorbs vibrational energy.Device energy by collision parts are damping rubber power consumption circle (the detailed accompanying drawing of structure), adopt high damping (damping ratio is greater than 5%) rubber to make.
4. antifatigue destruction parts pendulum rope antifatigue safety is the key issue that this control device can be permanently effective and safe.The position that pendulum rope fatiguability destroys is the support end of rope and the upper and lower side connecting portion of rope and mass.Because device rope when swing and collision produces back and forth bending power at above-mentioned position, rope will produce fatigue fracture under long-term reciprocating power effect, so the antifatigue structure that the application proposes is important key technology.This device adopts holddown spring (the detailed accompanying drawing of structure), relies on the recovery bounce of spring to bear bending power, reduces the bending power of rope, guarantees the tired safety of bend resistance of rope.
5. the support component main structure is tackled the effective support of device and is installed and can freely swing, and avoids friction and appearance to single pendulum generation additional constraint.This device adopts the accompanying drawing structure, effective support that can implement device, and satisfy the tired safety of bend resistance of rope.
Protection and maintenance hoist cable it be the attached member of device, lost efficacy the back in order to the protective device harm main structure that is unlikely to come off at main rope, he is also as device maintenance and main rope replacing simultaneously.Single hoist cable supporting capacity should be not less than 1.5 times of mass weight.
Claims (8)
1, dynamic absorber and the energy-dissipating device that reduces wind vibration response of high tower structure is called for short control device, comprise the steel wire pendulum rope (1) that an end hangs structurally, other end suspention has mass (2), it is characterized in that: antifatigue breaking plant (3) is housed in the described suspended structure, and its structure is: perforate backing plate (32) back that pendulum rope (1) passes cylinder-shaped compression spring (31) (31) and its two ends clamps with securing member (33).
2, dynamic absorber and the energy-dissipating device that reduces wind vibration response of high tower structure according to claim 1 is called for short control device, it is characterized in that: described mass (2) is the steel ball or the cast aluminium steel ball of perforation, pendulum rope (1) passes its hole, and antifatigue breaking plant (3) is equipped with in mass (2) upper end.
3, dynamic absorber and the energy-dissipating device that reduces wind vibration response of high tower structure according to claim 1 is called for short control device, it is characterized in that: described mass (2) is the steel ball or the cast aluminium steel ball of perforation, pendulum rope (1) passes its hole, and antifatigue breaking plant (3) is equipped with in mass (2) lower end.
4, dynamic absorber and the energy-dissipating device that reduces wind vibration response of high tower structure according to claim 1 is called for short control device, it is characterized in that: described mass (2) is the steel ball or the cast aluminium steel ball of perforation, pendulum rope (1) passes its hole, and mass (2) upper and lower end all is equipped with antifatigue breaking plant (3).
5, be called for short control device according to described dynamic absorber that reduces wind vibration response of high tower structure of claim 1 to 4 and energy-dissipating device, it is characterized in that: described mass (2) be peripherally equipped with damping energy dissipation parts rubber ring (4).
6, dynamic absorber and the energy-dissipating device that reduces wind vibration response of high tower structure according to claim 5 is called for short control device, and it is characterized in that: the damping ratio of described damping energy dissipation parts rubber ring (4) is greater than 5%.
7, dynamic absorber and the energy-dissipating device that reduces wind vibration response of high tower structure according to claim 1 is called for short control device, it is characterized in that: for mast structure (6), the mass of a plurality of control device (2) quality summation is greater than 1% of mast type generalized mass.
8, dynamic absorber and the energy-dissipating device that reduces wind vibration response of high tower structure according to claim 1 is called for short control device, it is characterized in that: draw at least one protection and maintenance hoist cable (5) between structure (6) and mass (2).
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102535674A (en) * | 2012-02-22 | 2012-07-04 | 广东电网公司电力科学研究院 | Tempering damper system used for improving wind resistance stability of transmission tower based on single pendulum model |
| CN102936927A (en) * | 2012-10-29 | 2013-02-20 | 广东电网公司电力科学研究院 | Lattice type power transmission tower horizontal vibration self-reset shock absorber |
| CN105297939A (en) * | 2015-11-17 | 2016-02-03 | 山东大学 | Nonlinear dynamic vibration absorption and electromagnetic energy dissipation device |
| CN107859709A (en) * | 2017-11-06 | 2018-03-30 | 清华大学 | A kind of overlength yardstick flexible structure active vibration-repressing device based on rope parallel architecture |
| CN108301678A (en) * | 2018-03-21 | 2018-07-20 | 宁夏凤城装备制造有限公司 | The windproof vibrating device of oxidation regeneration tower |
| CN110714649A (en) * | 2019-12-06 | 2020-01-21 | 上海量明科技发展有限公司 | Damping device for wind vibration resistance, communication tower and antenna assembly thereof |
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| DE3215428C2 (en) * | 1982-04-24 | 1984-05-24 | Friedrich Maurer Söhne GmbH & Co KG, 8000 München | Device for vibration damping on tower-like structures such as chimneys, transmitter masts or the like. |
| DE3816033A1 (en) * | 1988-05-10 | 1989-12-21 | Helmut Dr Ing Hagel | Vibration damper for structures |
| DE4231729C2 (en) * | 1992-09-22 | 1995-09-28 | Selkirk Schornsteintechnik Gmb | Device for damping vibrations on free-standing structures |
| CN2589551Y (en) * | 2002-12-12 | 2003-12-03 | 杭州电联机电设备成套有限公司 | Single tube tower control displacement vibration-damping apparatus |
| DE102004020605B4 (en) * | 2004-04-27 | 2006-08-10 | Erwin W. Kötter Consulting Engineers e.K. | Vibration absorbing or compensating device, designed as housing accommodating mass element attached to helical springs |
| CN200949272Y (en) * | 2005-12-13 | 2007-09-19 | 滕军 | Dynamic shockabsorbing and energy consumption apparatus capable of reducing high tower structure wind-induced vibration responses |
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2005
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| CN102535674A (en) * | 2012-02-22 | 2012-07-04 | 广东电网公司电力科学研究院 | Tempering damper system used for improving wind resistance stability of transmission tower based on single pendulum model |
| CN102535674B (en) * | 2012-02-22 | 2014-01-22 | 广东电网公司电力科学研究院 | Tempering damper system used for improving wind resistance stability of transmission tower based on single pendulum model |
| CN102936927A (en) * | 2012-10-29 | 2013-02-20 | 广东电网公司电力科学研究院 | Lattice type power transmission tower horizontal vibration self-reset shock absorber |
| CN105297939A (en) * | 2015-11-17 | 2016-02-03 | 山东大学 | Nonlinear dynamic vibration absorption and electromagnetic energy dissipation device |
| CN107859709A (en) * | 2017-11-06 | 2018-03-30 | 清华大学 | A kind of overlength yardstick flexible structure active vibration-repressing device based on rope parallel architecture |
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| CN110714649A (en) * | 2019-12-06 | 2020-01-21 | 上海量明科技发展有限公司 | Damping device for wind vibration resistance, communication tower and antenna assembly thereof |
| CN110714649B (en) * | 2019-12-06 | 2020-03-31 | 上海量明科技发展有限公司 | Damping device for wind vibration resistance, communication tower and antenna assembly thereof |
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