CN101638947A - Vibration damper for ultrahigh-voltage steel tube tower - Google Patents
Vibration damper for ultrahigh-voltage steel tube tower Download PDFInfo
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- CN101638947A CN101638947A CN200910168264A CN200910168264A CN101638947A CN 101638947 A CN101638947 A CN 101638947A CN 200910168264 A CN200910168264 A CN 200910168264A CN 200910168264 A CN200910168264 A CN 200910168264A CN 101638947 A CN101638947 A CN 101638947A
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- tube tower
- damping material
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 88
- 239000010959 steel Substances 0.000 title claims abstract description 88
- 238000013016 damping Methods 0.000 claims abstract description 59
- 239000000463 material Substances 0.000 claims abstract description 53
- 239000006096 absorbing agent Substances 0.000 claims description 19
- 241000209094 Oryza Species 0.000 claims description 10
- 235000007164 Oryza sativa Nutrition 0.000 claims description 10
- 235000009566 rice Nutrition 0.000 claims description 10
- 238000010008 shearing Methods 0.000 claims description 4
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- 239000013013 elastic material Substances 0.000 abstract 3
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 9
- 238000006073 displacement reaction Methods 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 230000001133 acceleration Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000001629 suppression Effects 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 241000282326 Felis catus Species 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000010189 synthetic method Methods 0.000 description 1
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Abstract
The invention provides a vibration damper for an ultrahigh-voltage steel tube tower. The vibration damper comprises a damping material layer and an elastic material layer. The damping material layer is sleeved on the outer wall of a base steel tube of the ultrahigh-voltage steel tube tower. The elastic material layer is sleeved on the outer wall of the damping material layer. When the base steel tube of the ultrahigh-voltage steel tube tower is bent and vibrated by influence of wind vibration, the inner surface and the outer surface of the damping material layer respectively produce compression and extension deformation so that the damping material layer bears shear stress and strain and then the vibration energy of the base steel tube can be consumed. The elastic material layer is used for limiting the free deformation of the outer surface of the damping material layer and ensuring the cooperation between the damping material layer and the base steel tube, thereby enhancing the damping performance of components and the whole structure and realizing the function of vibration damping.
Description
Technical field
The present invention relates to the UHV transmission equipment technical field, particularly a kind of vibration damper for ultrahigh-voltage steel tube tower.
Background technology
Because the developable hydroelectric resources of China nearly 2/3 is in western part, coal resources 2/3 in Shanxi, Shaanxi and the Inner Mongol; But the power load of China 2/3 but is distributed in the developed area of the coastal and Beijing-Guangzhou Railway in east to the east of along the line.Like this, just need be delivered to the big area, the central and east of electricity needs to the electric weight of energy base generating.
In order to reduce transmission losses, improve the transmission of electricity quality, China has built first UHV transmission line at present.
Ultra-high voltage AC transmission is meant the ac transmission engineering and the correlation technique of 1000kV and above electric pressure.Characteristics such as the UHV transmission technology has at a distance, big capacity, low-loss and economy.Though the UHV transmission technology has above advantage,, iron tower of power transmission line all there is very high requirement because the electric pressure of extra-high voltage is very high.
Because extra-high voltage steel tube tower height height, its natural frequency is lower, and is approaching with the fluctuating wind frequency, therefore resonates easily, produces big displacement, causes that extra-high voltage steel tube tower strength failure and connecting bolt become flexible etc., even influences the vibrationproof of lead wire and earth wire.Need in the design of extra-high voltage steel tube tower, consider wind vibration force load on the one hand, strengthen the wind loading rating of structure; Need on the other hand the extra-high voltage steel tube tower structural vibrations is controlled, with its restriction within the specific limits, reduce wind and shake the harm of circuit operation.
At present, adopt the method for strengthening the steel tube tower structure to control its wind-induced vibration mostly, for example increase member section, this passive control methods not only increases construction costs, and effect is also not obvious sometimes, especially for the large-scale steel pipe tower.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of vibration damper for ultrahigh-voltage steel tube tower, can reduce wind and shake to the influence of steel tube tower.
The invention provides a kind of vibration damper for ultrahigh-voltage steel tube tower, comprising: damping material layer and elastomeric layer;
Described damping material layer is set in the outer wall of extra-high voltage steel tube tower basic unit steel pipe;
Described elastomeric layer is set in the outer wall of described damping material layer.
Preferably, described damping material layer is a modulus of shearing smaller or equal to 2.0MPa and loss factor more than or equal to 1.0 damping material.
Preferably, described elastomeric layer is identical with the material of described basic unit steel pipe.
Preferably, the thickness of described damping material layer is 4-6mm.
Preferably, the thickness of described elastomeric layer is 4-6mm.
Preferably, when the height of extra-high voltage steel tube tower is 90-100 rice, at the bottom of tower, make progress 30 meters with the interior vibration absorber of all installing.
Preferably, when the height of extra-high voltage steel tube tower was 90-100 rice, upwards 15 meters interior external diameters with interior basic unit steel pipe were respectively 0.255m and 0.265m at the bottom of tower.
Preferably, when the height of extra-high voltage steel tube tower was 90-100 rice, the interior external diameter of basic unit's steel pipe was respectively 0.213m and 0.225m between 15 meters to 30 meters from making progress at the bottom of the tower.
Preferably, described elastomeric layer selection modulus of elasticity is the steel of 206MPa.
Compared with prior art, the present invention has the following advantages:
Vibration damper for ultrahigh-voltage steel tube tower provided by the invention comprises damping material layer and elastomeric layer; At the sheathed damping material layer of the outer wall of extra-high voltage steel tube tower basic unit steel pipe, at the sheathed elastomeric layer of the outer wall of described damping material layer.When the influence of shaking of basic unit's steel pipe wind-engaging of extra-high voltage steel tube tower, when bending vibration, the surfaces externally and internally of damping material layer produces compression and stretcher strain separately, thereby the damping material layer bears shear stress and strain, thereby consumes the vibrational energy of basic unit's steel pipe.The effect of elastomeric layer is the Free Transform of restriction damping material layer external surface, guarantees the collaborative work of damping material layer and basic unit's steel pipe, thereby increases the damping capacity of member and total, realizes the function of vibration damping.
Description of drawings
Fig. 1 is a vibration damper for ultrahigh-voltage steel tube tower sectional view of the present invention;
Fig. 2 is the extra-high voltage steel tube tower schematic diagram that the present invention installs vibration absorber.
The specific embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the specific embodiment of the present invention is described in detail below in conjunction with accompanying drawing.
Referring to Fig. 1, this figure is a vibration damper for ultrahigh-voltage steel tube tower sectional view of the present invention.
The vibration absorber of the extra-high voltage steel tube tower that present embodiment provides comprises: damping material layer 102 and elastomeric layer 103.
Described damping material layer 102 is set in the outer wall of extra-high voltage steel tube tower basic unit steel pipe 101.
Described damping material layer 102 select for use and have low shear modulus (＜2.0MPa) and the damping material of high loss factor (＞1.0).
Described elastomeric layer 103 is set in the outer wall of described damping material layer 102.
It is identical with the material of basic unit steel pipe 101 that described elastomeric layer 103 can be chosen as.
Vibration damper for ultrahigh-voltage steel tube tower provided by the invention comprises damping material layer and elastomeric layer; At the sheathed damping material layer of the outer wall of extra-high voltage steel tube tower basic unit steel pipe, at the sheathed elastomeric layer of the outer wall of described damping material layer.When the influence of shaking of basic unit's steel pipe wind-engaging of extra-high voltage steel tube tower, when bending vibration, the surfaces externally and internally of damping material layer produces compression and stretcher strain separately, thereby the damping material layer bears shear stress and strain, thereby consumes the vibrational energy of basic unit's steel pipe.The effect of elastomeric layer is the Free Transform of restriction damping material layer external surface, guarantees the collaborative work of damping material layer and basic unit's steel pipe, thereby increases the damping capacity of member and total, realizes the function of vibration damping.
Referring to Fig. 2, this figure is the extra-high voltage steel tube tower schematic diagram that the present invention installs vibration absorber.
Present embodiment is the installation site that example illustrates vibration absorber with the steel tube tower of 90-100 rice height.
Vibration damper for ultrahigh-voltage steel tube tower need be installed in the bigger position of steel tube tower moding strain energy, when the height of extra-high voltage steel tube tower not simultaneously, the position that vibration absorber is installed is also different.
When the height of extra-high voltage steel tube tower is 90-100 rice, preferably at the bottom of tower upwards 30 meters with the interior vibration absorber of all installing, vibration absorber 201 as shown in Figure 2 is installed on four legs of body of the tower trunk of steel tube tower.
The thickness of described damping material layer is 4-6mm.
The thickness of described elastomeric layer is 4-6mm.
When the height of extra-high voltage steel tube tower was 90-100 rice, upwards 15 meters interior external diameters with interior basic unit steel pipe were respectively 0.255m and 0.265m at the bottom of tower.
When the height of extra-high voltage steel tube tower was 90-100 rice, the interior external diameter of basic unit's steel pipe was respectively 0.213m and 0.225m between 15 meters to 30 meters from making progress at the bottom of the tower.
It is the damping material of 1.19MPa that described damping material layer is selected modulus of shearing.
It is the rigid material of 206MPa that described elastomeric layer is selected modulus of elasticity.
For example: for 1000kV common-tower double-return steel tube tower, overall height 96.3m exhales high 48m, and root is opened 17.37m, the about 90t of weight.
Behind the installation site of having determined vibration absorber, adopt the complex eigenvalue analytical method to calculate when different damping material layers and elastomeric material layer thickness, the modal damping ratio of steel tube tower-this system of damping material layer-elastomeric layer is determined effectiveness in vibration suppression by the raising of damping ratio; The last thickness scheme that is provided with is carried out free vibration time-histories simulation analysis, wind vibration response analysis and vibration-testing, further confirm its effectiveness in vibration suppression.
Disconnect to increase shear strain at each tower section junction damping material layer and basic unit's steel pipe.
The thickness of damping material layer is preferably 5mm, adopts the ISD112 damping material of Minnesota Mining and Manufacturing Company.The major parameter of damping material layer is: modulus of shearing 1.19MPa, poisson's ratio 0.499, maximum loss factor 1.04, density 1250kg/m
3
The thickness of elastomeric layer is preferably 5mm, adopts steel.The general selection of the material of described elastomeric layer is identical with the material of basic unit's steel pipe, guarantees the uniformity of extra-high voltage steel tube tower outward appearance.
The major parameter of elastomeric layer is: modulus of elasticity 206MPa, density 7850kg/m
3
In order to confirm the effectiveness in vibration suppression of vibration absorber, at first the steel tube tower that the vibration absorber front and back are set has been carried out the free vibration time-history analysis.
By apply an initial displacement at cat head, calculate the free vibration response after this initial displacement discharges, contrast cat head, middle cross-arm and following cross-arm and body of the tower junction modal displacement respectively the free vibration response of vibration absorber front and back is being installed.Result of calculation shows, adds the iron tower free vibration displacement response decay of vibration absorber and accelerates, and damping increases, and very significant effectiveness in vibration suppression is arranged.
Adopt the pulsation wind speed time-histories of each spot height of harmonic wave synthetic method simulation extra-high voltage steel tube tower.And adopt the wind speed time-histories of simulation to calculate the dynamic response that iron tower is installed the vibration absorber front and back, further analyze the vibration isolation effect of iron tower under wind action.
At first analyzed the control effect of steel tube tower under vertical wind action.According to the free vibration convergent response can calculate vibration absorber is installed after, the first rank buckling modal damping ratio is about 1.70%; The mean-square value of the length travel of body of the tower top node and longitudinal acceleration response is reduced to original 65.2% and 55.0% respectively.
To install body of the tower top node before and after the vibration absorber under the beam wind load action lateral displacement and be analyzed by the transverse acceleration response time-histories that the displacement difference branch obtains; According to the free vibration convergent response, the first rank transverse bending modal damping ratio behind the installation vibration absorber is about 1.76%; The mean-square value of the lateral displacement of body of the tower top node and transverse acceleration response is reduced to original 70.1% and 62.7% respectively.
Can be drawn by above analytical calculation, the rate of decay of lateral displacement, length travel and the transverse acceleration of extra-high voltage steel tube tower, longitudinal acceleration is all obviously accelerated after vibration absorber is installed, and effectiveness in vibration suppression is fairly obvious.And this damping device structure is simple, is convenient to install, safeguard.
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction.Though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention.Any those of ordinary skill in the art, do not breaking away under the technical solution of the present invention scope situation, all can utilize the method and the technology contents of above-mentioned announcement that technical solution of the present invention is made many possible changes and modification, or be revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not break away from technical solution of the present invention, all still belongs in the scope of technical solution of the present invention protection any simple modification, equivalent variations and modification that above embodiment did according to technical spirit of the present invention.
Claims (9)
1, a kind of vibration damper for ultrahigh-voltage steel tube tower is characterized in that, comprising: damping material layer and elastomeric layer;
Described damping material layer is set in the outer wall of extra-high voltage steel tube tower basic unit steel pipe;
Described elastomeric layer is set in the outer wall of described damping material layer.
2, vibration damper for ultrahigh-voltage steel tube tower according to claim 1 is characterized in that, described damping material layer is a modulus of shearing smaller or equal to 2.0MPa and loss factor more than or equal to 1.0 damping material.
3, vibration damper for ultrahigh-voltage steel tube tower according to claim 1 is characterized in that, described elastomeric layer is identical with the material of described basic unit steel pipe.
4, vibration damper for ultrahigh-voltage steel tube tower according to claim 1 is characterized in that, the thickness of described damping material layer is 4-6mm.
5, vibration damper for ultrahigh-voltage steel tube tower according to claim 1 is characterized in that, the thickness of described elastomeric layer is 4-6mm.
6, vibration damper for ultrahigh-voltage steel tube tower according to claim 1 is characterized in that, when the height of extra-high voltage steel tube tower is 90-100 rice, makes progress 30 meters with the interior vibration absorber of all installing at the bottom of tower.
7, vibration damper for ultrahigh-voltage steel tube tower according to claim 6 is characterized in that, when the height of extra-high voltage steel tube tower was 90-100 rice, upwards 15 meters interior external diameters with interior basic unit steel pipe were respectively 0.255m and 0.265m at the bottom of tower.
8, vibration damper for ultrahigh-voltage steel tube tower according to claim 6 is characterized in that, when the height of extra-high voltage steel tube tower was 90-100 rice, the interior external diameter of basic unit's steel pipe was respectively 0.213m and 0.225m between 15 meters to 30 meters from making progress at the bottom of the tower.
9, vibration damper for ultrahigh-voltage steel tube tower according to claim 8 is characterized in that, it is the steel of 206MPa that described elastomeric layer is selected modulus of elasticity.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101682647A CN101638947B (en) | 2009-08-20 | 2009-08-20 | Vibration damper for ultrahigh-voltage steel tube tower |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101682647A CN101638947B (en) | 2009-08-20 | 2009-08-20 | Vibration damper for ultrahigh-voltage steel tube tower |
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| CN101638947A true CN101638947A (en) | 2010-02-03 |
| CN101638947B CN101638947B (en) | 2011-05-11 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101979894A (en) * | 2010-09-21 | 2011-02-23 | 泰州口岸船舶有限公司 | Vibration reduction damper of ship hatch cover guide frame |
| CN102535671A (en) * | 2012-02-14 | 2012-07-04 | 扬州大学 | Bidirectional torsional lead shear damper |
| CN109738053A (en) * | 2018-11-28 | 2019-05-10 | 中国电力科学研究院有限公司 | A kind of concrete filled steel tube transmission tower determines method and device natural vibration period |
| CN110847674A (en) * | 2019-11-22 | 2020-02-28 | 山东大学 | Breeze vibration energy consumption suppression device for rod piece of service steel pipe tower |
| CN116971935A (en) * | 2023-08-02 | 2023-10-31 | 上海勘测设计研究院有限公司 | Restraint damping wind power tower |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1114933A (en) * | 1994-07-14 | 1996-01-17 | 吴永诚 | Double-wall sound-insulating plastic pipe |
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2009
- 2009-08-20 CN CN2009101682647A patent/CN101638947B/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101979894A (en) * | 2010-09-21 | 2011-02-23 | 泰州口岸船舶有限公司 | Vibration reduction damper of ship hatch cover guide frame |
| CN102535671A (en) * | 2012-02-14 | 2012-07-04 | 扬州大学 | Bidirectional torsional lead shear damper |
| CN102535671B (en) * | 2012-02-14 | 2013-10-30 | 扬州大学 | Bidirectional torsional lead shear damper |
| CN109738053A (en) * | 2018-11-28 | 2019-05-10 | 中国电力科学研究院有限公司 | A kind of concrete filled steel tube transmission tower determines method and device natural vibration period |
| CN109738053B (en) * | 2018-11-28 | 2022-11-01 | 中国电力科学研究院有限公司 | Method and device for determining self-vibration period of concrete-filled steel tube transmission tower |
| CN110847674A (en) * | 2019-11-22 | 2020-02-28 | 山东大学 | Breeze vibration energy consumption suppression device for rod piece of service steel pipe tower |
| CN116971935A (en) * | 2023-08-02 | 2023-10-31 | 上海勘测设计研究院有限公司 | Restraint damping wind power tower |
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| CN101638947B (en) | 2011-05-11 |
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