阅读说明：本技术 水平减振器及水平减振器中阻尼液介质质量的确定方法 (Horizontal shock absorber and method for determining medium mass of damping liquid in horizontal shock absorber ) 是由 张雪松 刘胜春 周立宪 齐翼 李冬青 顾建 孙娜 于 2019-09-27 设计创作，主要内容包括：本发明提供了一种水平减振器及水平减振器中阻尼液介质质量的确定方法,该减振器包括支架和减振器,所述支架为矩形支架,所述减振器的数目为一,位于所述矩形支架内侧；所述矩形支架和减振器位于同一平面上。该减振器主要是靠装置内封装高阻尼液介质提供的阻尼来降低导线水平振动,其可以防治的水平风频范围广。对可以引起减振器共振的风频,该减振器可以起到最大限度的耗能减振的作用。对不能引起减振器共振的风频,水平风能通过导线支架传到圆柱形减振器,并通过的粘滞阻尼液介质的晃动消耗水平风能,同样起到减振作用。从而使得该减振器可以在更宽的频率范围内减低导线的水平风振引起的动力响应。(The invention provides a horizontal shock absorber and a method for determining the quality of a damping fluid medium in the horizontal shock absorber, wherein the shock absorber comprises a bracket and shock absorbers, the bracket is a rectangular bracket, and the number of the shock absorbers is one, and the shock absorbers are positioned on the inner side of the rectangular bracket; the rectangular support and the shock absorber are located on the same plane. The vibration absorber mainly reduces horizontal vibration of the lead by means of damping provided by high-damping liquid media packaged in the device, and the horizontal wind frequency range of the vibration absorber can be wide. The damper can play a role in energy dissipation and vibration reduction to the maximum extent for wind frequency which can cause the damper to resonate. For wind frequency which can not cause the vibration absorber to resonate, horizontal wind energy is transmitted to the cylindrical vibration absorber through the wire bracket, and the horizontal wind energy is consumed by the shaking of the passing viscous damping fluid medium, so that the vibration absorber also has the vibration absorbing effect. Therefore, the vibration damper can reduce the dynamic response caused by horizontal wind vibration of the wire in a wider frequency range.)

1. A horizontal shock absorber comprises a bracket and shock absorbers, and is characterized in that the bracket is a rectangular bracket, and the number of the shock absorbers is one, and the shock absorbers are positioned on the inner side of the rectangular bracket; a damping fluid medium is arranged in the shock absorber; the support and the shock absorber are located on the same plane.

2. A horizontal vibration absorber as claimed in claim 1, wherein said vibration absorber is provided with a vibration absorber casing, said vibration absorber casing being provided with external connecting members connected to said bracket in the axial and longitudinal directions, respectively.

3. A horizontal vibration absorber as claimed in claim 1, wherein one side of said vibration absorber is provided with a vibration absorber support for supporting the vibration absorber.

4. A horizontal vibration absorber as claimed in claim 1, wherein said rectangular support is provided with wire connecting clips on the outside of each corner.

5. A horizontal vibration damper according to claim 4 wherein said wire connecting clip is comprised of three parts lying in the same plane at angles of 90 ° and 135 ° to each other.

6. A horizontal vibration damper according to claim 5, characterized in that the connection between the parts which are at an angle of 90 ° to each other and the bracket connecting member which constitutes said rectangular bracket is a screw connection.

7. A horizontal shock absorber as set forth in claim 1 wherein said shock absorber member is a spacer perpendicular to said axial direction, said spacer having a height in said axial direction greater than the height of said damping fluid medium contained therein and less than the height of the interior of said shock absorber, said spacer being centrally located within said shock absorber; the partition board is provided with a through hole with at least two apertures.

8. A horizontal vibration damper according to claim 7, wherein the through holes of said two diameters have diameters of 1mm to 2mm and 0.5mm to 1mm, respectively, the sum of the areas of the holes is 40% to 60% of the area of the entire partition plate, and the through holes of the two diameters are arranged at intervals.

9. A horizontal vibration dampener as recited in claim 2, wherein said housing is made of Ti-15Mo-3AI-2.7Nb-0.2 Si.

10. A method for determining the mass of a damping fluid medium in a horizontal shock absorber comprising:

obtaining acceleration resonance frequency based on an acceleration amplitude-frequency characteristic curve of the damper;

calculating the natural frequency according to the acceleration resonance frequency;

and calculating the mass of the damping fluid medium according to the natural frequency.

11. The method for determining the mass of a damping fluid medium in a horizontal shock absorber according to claim 10, wherein the natural frequency is calculated by the formula;

where ω is the acceleration resonance frequency, ω_nIs the natural frequency of the shock absorber and ξ is the damping ratio of the shock absorber.

12. The method for determining the mass of the damping fluid medium in the horizontal shock absorber according to claim 10, wherein the calculation formula of the mass of the damping fluid medium is as follows:

in the formula m_fIs the mass of the damping fluid medium, w_nK is the natural frequency of the damper, k is the stiffness of the damper, m₁Is the structural mass of the body of the shock absorber.

Technical Field

The invention belongs to the technical field of power grid disaster prevention, and particularly relates to a horizontal shock absorber and a method for determining the quality of a damping liquid medium in the horizontal shock absorber.

Background

The large-span ultra-high-strength aluminum alloy stranded wire can generate large-amplitude horizontal oscillation under the action of continuous stable wind, and the energy of the horizontal oscillation is dissipated by the friction between the large-span strand wires. Also when the power conductor is in a sustained stable wind zone, such horizontal oscillations may last for a long period of time, which may result in the strands of the conductor dissipating horizontal wind energy through friction between the strands for a long period of time. This friction between the strands can cause wear on the conductor and, in severe cases, can cause the worn positions of the strands to break. The long-term micro-vibration and dead weight pressure of the damping device can make the device slowly generate large plastic deformation, which can cause the unstable performance of the damping device.

In order to reduce the damage of the aluminum alloy stranded wire to the transmission line caused by continuous and large-amplitude horizontal oscillation, a shock absorber is urgently needed, and the material of the device needs to be considered because the shock absorber needs to be exposed to weather such as wind, frost, rain and snow.

Disclosure of Invention

In order to overcome the defects of the prior art, the horizontal shock absorber and the method for determining the quality of the damping fluid medium in the horizontal shock absorber are provided.

The purpose of the invention is realized by the following technical scheme:

a horizontal shock absorber comprises a bracket and shock absorbers, wherein the bracket is a rectangular bracket, and the number of the shock absorbers is one, and the shock absorbers are positioned on the inner side of the bracket; a damping fluid medium is arranged in the shock absorber; the support and the shock absorber are located on the same plane.

Preferably, the shock absorber is provided with a shock absorber shell, and the shock absorber shell is respectively provided with a connecting piece connected with the bracket in the axial direction and the longitudinal direction.

Preferably, a damper support supporting the damper is provided at one side of the damper.

Preferably, a wire connecting clamp is arranged on the outer side of each corner of the rectangular bracket.

Preferably, the wire connecting clip consists of three parts lying in the same plane at an angle of 90 ° and 135 ° to each other.

Preferably, the connection between the parts forming an included angle of 90 degrees with each other and the bracket connecting piece forming the rectangular bracket is a threaded connection.

Preferably, the damping member in the shock absorber is a partition plate perpendicular to the axial direction, the height of the partition plate in the axial direction is greater than the height of the contained damping medium and less than the internal height of the shock absorber, and the partition plate is located at the center of the shock absorber.

Preferably, the outer shell is made of a material of Ti-15Mo-3AI-2.7Nb-0.2 Si.

The invention also provides a method for determining the quality of the damping fluid medium in the horizontal shock absorber, which comprises the following steps:

obtaining acceleration resonance frequency based on an acceleration amplitude-frequency characteristic curve of the damper;

calculating the natural frequency according to the acceleration resonance frequency;

and calculating the mass of the damping fluid medium according to the natural frequency.

Preferably, the calculation formula of the natural frequency is;

in the formula, omega isVelocity resonance frequency, ω_nIs the natural frequency of the shock absorber and ξ is the damping ratio of the shock absorber.

Preferably, the calculation formula of the mass of the damping fluid medium is as follows:

in the formula m_fIs the mass of the damping fluid medium, w_nK is the natural frequency of the damper, k is the stiffness of the damper, m₁Is the structural mass of the body of the shock absorber.

Compared with the prior art, the invention has the beneficial effects that:

the horizontal vibration damper provided by the invention has good automatic activation performance and can widen the vibration damping frequency range. The horizontal vibration of the lead is reduced mainly by the damping provided by a high-damping liquid medium body packaged in the device, and the horizontal wind frequency range of the shock absorber which can be prevented and controlled is wide. The damper can play a role in energy dissipation and vibration reduction to the maximum extent for wind frequency which can cause the damper to resonate. For wind frequency which can not cause the vibration absorber to resonate, horizontal wind energy is transmitted to the cylindrical vibration absorber through the wire bracket, and the horizontal wind energy is consumed by the shaking of the passing viscous damping fluid medium, so that the vibration absorber also has the vibration absorbing effect. Therefore, the vibration damper can reduce the dynamic response caused by horizontal wind vibration of the wire in a wider frequency range.

The horizontal vibration damper provided by the invention has strong energy dissipation capability. The damping fluid medium energy dissipation structure is packaged in the shock absorber, the set of energy dissipation structure can dissipate horizontal wind vibration energy, and in addition, the partition plate in the damping fluid medium energy dissipation device can increase the effect of damping fluid medium energy dissipation. Therefore, the energy consumption system can effectively reduce the horizontal wind vibration in the span and over the wire.

The support structure of the horizontal shock absorber provided by the invention adopts an assembly integral design, can be conveniently disassembled and assembled, and can firmly connect the horizontal shock absorber and the power transmission conductor, so that the wind energy of the power transmission conductor is transmitted to the horizontal damping device.

The partition plate in the damping fluid medium energy dissipation structure provided by the invention adopts a half-moon-shaped structural design with two circular holes, and the structural design increases the resistance of the damping fluid medium passing through the partition plate and obviously increases the damping energy dissipation capacity of the damper.

The horizontal vibration damper provided by the invention has self-adaptive capacity, and can change self parameters according to the change of external excitation, so that the self natural frequency is kept consistent with the external excitation frequency, and a better vibration damping effect is obtained.

The horizontal vibration damper provided by the invention has the characteristics of easiness in installation, no maintenance and good durability. The invention designs the structure of the high damping liquid medium body package, so that the high damping liquid medium body package can be hung in the air without oil leakage, and has the advantages of no maintenance and good durability.

The horizontal wind vibration mechanical model of the horizontal vibration damper provided by the invention can be applied to the finite element calculation of the dynamic characteristics of the wire and the horizontal vibration damper, the accuracy of the dynamic characteristic calculation of the horizontal vibration damper can be obviously improved by adopting the finite element calculation result of the model, and the calculation result is closer to the test result.

The parameter identification and optimization method for the horizontal wind vibration mechanical model parameter test of the horizontal vibration damper provided by the invention can identify the inherent frequency and the damping ratio of each order of the damper and optimize the two parameters, thereby improving the energy consumption and vibration reduction effects of the damper.

The method and the position for installing the horizontal vibration damper provided by the invention can ensure that the damper is conveniently and firmly installed on the transmission conductor and ensure that the horizontal vibration damper achieves the optimal damping effect.

The invention has good deformation resistance, the shell is made of novel materials, not only can be prevented from being corroded in severe environment, but also can not generate plastic deformation under the influence of long-term micro vibration and dead weight pressure.

Description of the drawings:

the invention will be further described with reference to the accompanying drawings in which:

FIG. 1 is an overall structure of a horizontal shock absorber;

FIG. 2 is a mechanical model of the shock absorber;

FIG. 3 is a structural design of the stent connecting rod;

FIG. 4 is a structural design of a bracket connecting elbow;

FIG. 5 shows the internal structure of the horizontal vibration damper;

FIG. 6 baffle and hole pattern design;

FIG. 7 is a horizontal damper natural frequency test system;

FIG. 8 is a hole site layout of the table top of the vibration table;

FIG. 9 is a flat absorber natural frequency test system;

reference numerals: the vibration damper comprises 1-fastening bolts, 2-vibration damper supports, 3-vibration damper connecting supports, 4-horizontal vibration dampers, 5-support connecting rod pieces, 6-first connecting holes, 7-internal threads, 8-connecting elbows, 9-elbow internal thread holes, 10-lead connecting chucks, 11-chuck fastening bolts, 12-second connecting holes, 13-damping liquid media, 14-vibration damper shells, 15-external connecting pieces, 16-partition plates, 17-bolts, 18-I-shaped supports, 19-acceleration sensors and 20-vibration table tops.

Detailed Description

The following examples are given to further illustrate the embodiments of the present invention, but the present invention is not limited to these examples.

Example 1:

the horizontal vibration damping liquid shock absorber disclosed by the invention adopts an assembled integral structure design shown in figure 1, the integral structure of the horizontal shock absorber is composed of a shock absorber connecting support, in the embodiment, a rectangular support is composed of the shock absorber connecting support, a horizontal shock absorber 4 and a fastening bolt 1. The shock absorber connecting bracket 3 is composed of a bracket connecting rod piece 5 as shown in figure 3 and a connecting elbow 8 as shown in figure 4, the cross section of the bracket connecting rod piece 5 is circular, the end part of the bracket connecting rod piece is provided with an internal thread 7, the middle part of the bracket connecting rod piece is thickened, and an elliptic first connecting hole 6 is arranged; the connecting elbow 8 is circular in cross section, one end of the connecting elbow is provided with a lead connecting chuck 10 for connecting a transmission lead, and the other two ends of the connecting elbow are provided with elbow internal thread holes 9 for connecting rod pieces. The horizontal vibration damper 4 is connected with the bracket through the long rod fastening bolt 1. Fig. 5 shows an internal structure diagram of a horizontal shock absorber, a damping fluid medium, namely dimethyl silicon oil, is arranged inside a cylindrical box body of a damping fluid medium energy consumption system, a partition plate 16 is arranged for improving energy dissipation efficiency and increasing damping effect, the partition plate 16 adopts a half-moon-shaped structure design with two circular holes, the diameters of the two circular holes are respectively 1 mm-2 mm and 0.5 mm-1 mm, the total area of the holes accounts for 40% -60% of the area of the whole partition plate, and the holes with two different diameters are arranged at intervals. The baffle plays the effect of separation to the damping fluid medium that rocks, and the baffle can be at the dissipation of the internal energy of oval clean shot baffle isotructure increase liquid body, produces additional damping when making liquid flow around, increases the liquid energy dissipation, finally reaches the purpose that strengthens horizontal shock absorber damping effect. And finally, the vibration absorber is connected with the bracket connecting rod piece through a fastening bolt.

Fig. 2 shows a dual-damping frequency-modulation mass-mechanical model of the shock absorber, and it can be seen from the figure that: the mass of the damper is defined by the mass M of the body structure of the damper₁And a liquid mass M inside the shock absorber_fTwo parts are formed. The horizontal vibration absorber damps viscous damping C generated by viscous damping fluid medium in the vibration absorber₀. The stiffness of the damper is K. The control force F of the horizontal vibration damper on the horizontal oscillation of the power transmission conductor is generated by the inertia force F generated by the movement of liquid along with the structure₁And the viscous force F generated by the liquid during movement₂And (4) forming.

The integral structure of the horizontal shock absorber is shown in figure 1, a support connecting rod is shown in figure 3, a support connecting elbow is shown in figure 4, the integral structure of the horizontal shock absorber is designed in an assembly integral structure, and the integral structure of the horizontal shock absorber is composed of a shock absorber connecting support 3, a horizontal shock absorber 4 and a fastening bolt 1. The shock absorber connecting support consists of a support connecting rod piece 5 and a connecting elbow 8, the section of the support connecting rod piece 5 is circular, an internal thread 7 is arranged at the end part of the support connecting rod piece, the middle part of the support connecting rod piece is thickened, and an oval first connecting hole 6 is arranged; the connecting elbow 8 is circular in cross section, one end of the connecting elbow is provided with a lead connecting chuck 10 for connecting a transmission lead, and the other two ends of the connecting elbow are provided with elbow internal thread holes 9 for connecting rod pieces. The horizontal vibration damper 4 is connected with the vibration damper connecting bracket 3 through the long rod fastening bolt 1.

Fig. 5 shows an internal structure diagram of a horizontal shock absorber, which is composed of two sets of energy dissipation damping systems, and one set is composed of damping fluid medium energy dissipation systems. The damping fluid medium is arranged in a cylindrical box body of the damping fluid medium energy consumption system. FIG. 6 is a design of partition plate and hole pattern, the partition plate 16 in the structure diagram adopts a half-moon-shaped structure design with two circular holes, the diameters of the two circular holes are 1 mm-2 mm and 0.5 mm-1 mm respectively, the sum of the areas of the holes accounts for 40% -60% of the area of the whole partition plate, and the holes with two different diameters are arranged at intervals. Baffle 16 plays the effect of separation to the damping fluid medium 13 that rocks, and baffle 16 can be at the dissipation of oval clean shot baffle isotructure increase liquid internal energy, and additional damping produces when making liquid flow around, increases the liquid energy dissipation, finally reaches the purpose that strengthens horizontal shock absorber damping effect.

Fig. 7 shows a test system for the natural frequency of a horizontal vibration damper. The system consists of a vibration table, a vibration damper connecting bracket 3, a horizontal vibration damper 4 and an acceleration sensor 19. In the figure, 20 is a horizontal vibration table, which generates a horizontal sinusoidal excitation signal and transmits the excitation signal to the horizontal vibration absorber 4 through a jig-shaped bracket. 19 are two acceleration sensors respectively arranged at the tops of the horizontal vibration table and the vibration damper, and 17 is a bolt for connecting the horizontal vibration table, the I-shaped bracket 18 and the horizontal vibration damper 4 together. The holes on the top 20 of the vibration table are arranged as

As shown in fig. 8.

Fig. 9 is a displacement amplitude attenuation curve of a horizontal sine wave applied by the horizontal vibration table when the shock absorber applies shock excitation.

In order to reduce the damage of the aluminum alloy stranded wire to the transmission conductor caused by continuous large-amplitude horizontal oscillation, the invention provides the horizontal vibration damping liquid medium shock absorber which can absorb the energy of the horizontal oscillation of the transmission conductor and reduce the horizontal oscillation amplitude of the transmission conductor, thereby reducing the damage of the continuous large-amplitude oscillation to the transmission conductor and ensuring the operation safety of a power grid.

The invention provides a horizontal vibration damping liquid medium shock absorber. When the shock absorber generates horizontal movement under the action of wind load, the damping liquid medium in the damping liquid medium shock absorber moves towards the opposite direction of the shock absorber movement due to inertia, and then pressure opposite to the shock absorber movement direction is generated, and the pressure acts on a power transmission line through the shock absorber, so that the effect of reducing the wind vibration of a power transmission lead is achieved; in addition, the viscosity of the damping fluid medium in the damping device can also play a role in dissipating wind energy, namely the horizontal shock absorber plays a role in damping the power transmission conductor by utilizing the hydrodynamic pressure generated by the liquid shaking and the energy dissipation of the damping fluid medium. The mass of the horizontal vibration damper is changed by changing the liquid amount in the damping liquid medium box body, so that the natural frequency of the horizontal vibration damper is changed, the natural frequency of the horizontal vibration damper is consistent with the current horizontal wind vibration frequency, and the optimal damping effect is achieved. And should be installed at the maximum displacement of the mode shape, the damping ratio of the liquid shaking basic mode shape must be the optimal value, and in order to avoid the excessive change of the frequency and the mode shape of the structure, the modal mass of the damping liquid medium 13 basic mode shape is generally 1% -10% of the modal mass of the shock absorber. In order to further improve the energy consumption capability of the shock absorber, the height of the damping liquid medium accounts for 40% -60% of the height of the damping liquid medium container. The horizontal vibration damper provided by the invention has good automatic activation performance and can widen the vibration damping frequency range. The horizontal vibration of the lead is reduced mainly by the damping provided by a high-damping liquid medium body packaged in the device, and the horizontal wind frequency range of the shock absorber which can be prevented and controlled is wide. The damper can play a role in energy dissipation and vibration reduction to the maximum extent for wind frequency which can cause the damper to resonate. For wind frequency which can not cause the vibration absorber to resonate, horizontal wind energy is transmitted to the cylindrical vibration absorber through the wire bracket, and the horizontal wind energy is consumed by the shaking of the passing viscous damping fluid medium, so that the vibration absorber also has the vibration absorbing effect. Therefore, the vibration damper can reduce the dynamic response caused by horizontal wind vibration of the wire in a wider frequency range.

Mechanics model of horizontal vibration damper

Figure 2 shows a mechanical model of the shock absorber. Can seeAnd (3) discharging: the mass of the damper is defined by the mass M of the body structure of the damper₁And a liquid mass M inside the shock absorber_fTwo parts are formed. The horizontal vibration absorber damps viscous damping C generated by viscous damping fluid medium in the vibration absorber₀. The stiffness of the damper is K. The control force F of the horizontal vibration damper on the horizontal oscillation of the power transmission conductor is generated by the inertia force F generated by the movement of liquid along with the structure₁And the viscous force F generated by the liquid during movement₂And (4) forming. According to the dynamic balance principle, the motion differential equation of the variable mass dynamic vibration absorber is as follows:

during operation of the damper: mass M of liquid_fCan be from 0 to M_fmaxThe range is adjusted according to the external excitation condition, so that the variable range of the mass of the damper is M₁To M₁₊M_fmax. Thus, the natural frequency ω of the damper_nComprises the following steps:

as can be seen from equation 2: mass m of liquid_fFrom 0 to m_fmaxNatural frequency omega of the damper when varied within a range_nAlso varies therewith, in the range ofToTherefore, when the external frequency ω is located atToWhen the frequency is within the range, the natural frequency of the damping liquid medium in the damping liquid medium device can be kept consistent with the external frequency omega by adjusting the mass of the damping liquid medium in the damping liquid medium device, so that the energy consumption capacity of the horizontal shock absorber is maximized. The horizontal wind vibration mechanical model of the horizontal vibration damper provided by the invention can be applied to the finite element calculation of the dynamic characteristics of the wire and the horizontal vibration damper, the accuracy of the dynamic characteristic calculation of the horizontal vibration damper can be obviously improved by adopting the finite element calculation result of the model, and the calculation result is closer to the test result.

Test protocol provided for the present invention

From the upper mechanical model, it can be seen that: as long as the mass of the liquid of the horizontal damper is adjusted to ensure that the natural frequency of the shock absorber is consistent with the external frequency, the shock absorber can obtain the best horizontal wind vibration damping effect. In order to measure the damping and natural frequency of the horizontal vibration absorber, the invention designs a set of test device. The device comprises a vibration table, an I-shaped bracket 18, a horizontal vibration absorber 4, an acceleration sensor 19 and the like, and is shown in figure 6. Before the test, firstly, the I-shaped bracket 18 is fixed on the vibration table by the bolts 17, and the horizontal vibration damper 4 is fixed on the horizontal vibration damper bracket by the bolts 17. The acceleration sensor 19 is arranged on the vibration table, the measuring direction is consistent with the moving direction of the platform, and the motion acceleration of the platform can be measured in real time. The acceleration sensor is arranged on the side wall of the horizontal shock absorber, the measuring direction is consistent with the moving direction of the platform, and the motion acceleration of the horizontal shock absorber can be measured in real time. During testing, the signal generator generates simple harmonic vibration in the horizontal direction, the simple harmonic vibration is output to the vibration table after being amplified by the power amplifier, the vibration table drives the horizontal vibration absorber to vibrate through the I-shaped fixed support, acceleration sensors respectively placed on the vibration table and the horizontal vibration absorber collect acceleration signals generated in the vibration process, the acceleration signals are amplified and filtered by the charge amplifier and then transmitted to the data acquisition instrument, the acceleration signals are transmitted to a computer through the data acquisition instrument, and the computer processes and analyzes the collected data through data acquisition and analysis software and stores results. In the vibration process, the horizontal vibration absorber can change the mass of the medium of the damping liquid loaded by the horizontal vibration absorber to achieve the purpose of widening the frequency reduction band of the horizontal vibration absorber. The hole site layout of the vibration table top is shown in fig. 7.

Damping coefficient test

In order to perform parameter identification on the damping ratio of the shock absorber, impact excitation, namely a horizontal sine wave applied by a horizontal vibration table, is applied to the shock absorber, a relatively ideal vibration attenuation curve is stored through data acquisition and analysis software, and finally the damping ratio of the shock absorber is calculated according to formulas 3 to 5 according to the vibration attenuation curve as shown in fig. 8.

From this, a logarithmic decrement of:

substituting the formula (3) into the approximate calculation formula (4) of the damping ratio to obtain

Natural frequency testing

The natural frequency is an important characteristic parameter of a vibrating system, which depends on the mass and stiffness of the system itself.

In experiments, a common method for measuring parameters of a vibration system is often used in a resonance method, i.e., a method for estimating a natural frequency by using a relationship between the natural frequency and a resonance frequency. The resonance frequency is an excitation frequency corresponding to a resonance of the vibration system and a maximum response amplitude. The response of the shock absorber is acceleration, which is referred to as the acceleration resonance frequency. In the natural frequency identification experiment of the shock absorber, an acceleration amplitude-frequency characteristic curve of the shock absorber needs to be measured, the acceleration resonance frequency omega of the shock absorber is determined through the curve, and then the natural frequency of the shock absorber is respectively omega according to the calculation formula 6 of the natural frequency by solving_n。

Where ω is the acceleration resonance frequency, ω_nIs the natural frequency of the shock absorber, and xi is the damping ratio of the shock absorber

According to the formula 6, the natural frequency of the horizontal damping liquid vibration damping system is the same as the horizontal excitation frequency by adjusting the mass of the damping liquid medium of the vibration absorber, and the vibration absorber can resonate. The frequency range of the horizontal vibration damper to effectively damp the lead is 5 Hz-80 Hz through tests, and the damping ratio range is as follows: 0.05 to 0.12.

Mounting of horizontal dampers

The horizontal shock absorber of the invention adopts an assembled integral structure. When in installation, the support connecting rod piece 5 is firstly installed in an internal thread hole of the connecting elbow 8, then the long rod fastening bolt 1 penetrates through the elliptical groove holes of the support and the shock absorber support 2, the horizontal shock absorber is connected in an external internal thread hole, and finally the support and the transmission conductor are connected together through the conductor connecting chuck 10. The horizontal damper should be installed at the maximum displacement of the wire mode.

Conclusion of the Experimental protocols

The horizontal vibration damper provided by the invention has strong energy dissipation capability. The damping fluid medium energy dissipation structure is packaged in the shock absorber, the set of energy dissipation structure can dissipate horizontal wind vibration energy, and in addition, the partition plate in the damping fluid medium energy dissipation device can increase the effect of damping fluid medium energy dissipation. Therefore, the energy consumption system can effectively reduce the horizontal wind vibration in the span and over the wire.

The horizontal vibration damper provided by the invention has good automatic activation performance and can widen the vibration damping frequency range. The horizontal vibration of the lead is reduced mainly by the damping provided by a high-damping liquid medium body packaged in the device, and the horizontal wind frequency range of the shock absorber which can be prevented and controlled is wide. The damper can play a role in energy dissipation and vibration reduction to the maximum extent for wind frequency which can cause the damper to resonate. For wind frequency which can not cause the vibration absorber to resonate, horizontal wind energy is transmitted to the cylindrical vibration absorber through the wire bracket, and the horizontal wind energy is consumed by the shaking of the passing viscous damping fluid medium, so that the vibration absorber also has the vibration absorbing effect. Therefore, the vibration damper can reduce the dynamic response caused by horizontal wind vibration of the wire in a wider frequency range.

The support structure of the horizontal shock absorber provided by the invention adopts an assembly integral design, can be conveniently disassembled and assembled, and can firmly connect the horizontal shock absorber and the power transmission conductor, so that the wind energy of the power transmission conductor is transmitted to the horizontal damping device.

The partition plate in the damping fluid medium energy dissipation structure provided by the invention adopts a half-moon-shaped structural design with two circular holes, and the structural design increases the resistance of the damping fluid medium passing through the partition plate and obviously increases the damping energy dissipation capacity of the damper.

The horizontal vibration damper provided by the invention has self-adaptive capacity, and can change self parameters according to the change of external excitation, so that the self natural frequency is kept consistent with the external excitation frequency, and a better vibration damping effect is obtained.

The horizontal vibration damper provided by the invention has the characteristics of easiness in installation, no maintenance and good durability. The invention designs the structure of the high damping liquid medium body package, so that the high damping liquid medium body package can be hung in the air without oil leakage, and has the advantages of no maintenance and good durability.

The horizontal wind vibration mechanical model of the horizontal vibration damper provided by the invention can be applied to the finite element calculation of the dynamic characteristics of the wire and the horizontal vibration damper, the accuracy of the dynamic characteristic calculation of the horizontal vibration damper can be obviously improved by adopting the finite element calculation result of the model, and the calculation result is closer to the test result.

The parameter identification and optimization method for the horizontal wind vibration mechanical model parameter test of the horizontal vibration damper provided by the invention can identify the inherent frequency and the damping ratio of each order of the damper and optimize the two parameters, thereby improving the energy consumption and vibration reduction effects of the damper.

The method and the position for installing the horizontal vibration damper provided by the invention can ensure that the damper is conveniently and firmly installed on the transmission conductor and ensure that the horizontal vibration damper achieves the optimal damping effect.

The invention has good deformation resistance, the shell is made of novel materials, not only can be prevented from being corroded in severe environment, but also can not generate plastic deformation under the influence of long-term micro vibration and dead weight pressure.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, improvement or the like made within the spirit and principle of the present invention is included in the scope of the claims of the present invention filed as filed.