CN112582962B - Damper and method for determining mass of damping liquid medium in damper - Google Patents
Damper and method for determining mass of damping liquid medium in damper Download PDFInfo
- Publication number
- CN112582962B CN112582962B CN201910926083.XA CN201910926083A CN112582962B CN 112582962 B CN112582962 B CN 112582962B CN 201910926083 A CN201910926083 A CN 201910926083A CN 112582962 B CN112582962 B CN 112582962B
- Authority
- CN
- China
- Prior art keywords
- damping
- damper
- damping piece
- piece
- steel strand
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/14—Arrangements or devices for damping mechanical oscillations of lines, e.g. for reducing production of sound
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G17/00—Apparatus for or methods of weighing material of special form or property
- G01G17/04—Apparatus for or methods of weighing material of special form or property for weighing fluids, e.g. gases, pastes
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The application provides a damper and a method for determining the mass of damping liquid medium in the damper, wherein the damper comprises damping pieces arranged vertically and horizontally, and the damping pieces arranged horizontally consist of damping pieces symmetrically arranged on the same horizontal plane; the vertical damping piece and the transverse damping piece are vertically connected, and the connecting point of the vertical damping piece and the transverse damping piece is positioned at the midpoint of the transverse damping piece. The damper has three energy consumption structures: namely a hemispherical damping piece containing damping liquid medium, a steel strand structure relying on friction energy dissipation among strands and a vertical damping piece with hysteresis energy dissipation capability. The three sets of energy consumption systems can dissipate vertical wind vibration energy, so that the two sets of energy consumption systems of the application can effectively reduce vertical wind vibration of a large-span wire in a span.
Description
Technical Field
The application relates to the technical field of power grid disaster prevention, in particular to a damper and a method for determining the mass of damping liquid medium in the damper.
Background
Under the action of continuous stable wind, the connection part of the wire and the damper is easy to wear and even broken strands, and the safe operation of the wire is seriously threatened. Further, the damper has an effect of reducing the vibration of the power transmission wire only at several natural frequencies, and outside of these several frequency points, the damper's effect of reducing the wind vibration is significantly reduced. Moreover, the existing damper basically dissipates wind energy only by friction of steel strands, so that the damping coefficient of the damper is low. The long-term micro-vibration and the dead weight pressure of the vibration damping device can lead the device to slowly generate larger plastic deformation, which can lead the performance of the vibration damping device to be unstable.
In order to reduce the damage to the transmission wire caused by breeze vibration of the aluminum alloy stranded wire, a vibration damping device is urgently needed, and the vibration damping device is required to be exposed to weather such as frost, snow, rain and the like, so that the material selection of the device is also crucial.
Disclosure of Invention
The application provides a novel damping damper, which has higher damping coefficient, reduces the frequency band of vertical wind vibration of a wire, can reduce the abrasion degree of the damper on a transmission wire, can prevent the problem of deformation of equipment and ensures the operation safety of a power grid.
Aiming at the defects of the prior art, the application designs a damper and a method for determining the mass of damping liquid medium in the damper; the damper consists of a steel strand, a hammer head and a wire clamp; the hammer head of the damper is formed by connecting a solid hammer head and a hollow hammer head through a flange, wherein the solid hammer head and a steel strand are pressed together through a sleeve, and the top of the solid hammer head and the steel strand are packaged together through tin; the hollow hammer head is provided with a set of damping fluid energy consumption vibration damper which consists of a spherical hollow shell, a baffle plate and damping fluid, wherein the baffle plate in the hollow hammer is provided with two middle holes of a large hole and a small hole so as to increase the flowing resistance of the damping fluid; the lower part of the wire clamp is connected with a steel strand in a punching way, and the hammer head is connected with the steel strand in a riveting way; the vibration-proof hammer line clamp consists of a power transmission wire clamp head, an S-shaped damping energy-dissipation metal plate, a steel strand fastener and a fastening bolt; the S-shaped damping energy-consumption metal plate is connected with the wire clamp through a fastening bolt; the wire clamp bottom is provided with the through-hole, and the steel strand wires pass this through-hole, with crimping mode and fastener body coupling.
The application aims at realizing the following technical scheme:
the application provides a damper, which comprises a vertical damper arranged vertically and a transverse damper arranged transversely, and comprises: the transverse damping piece consists of damping pieces symmetrically arranged on the same horizontal plane; the vertical damping piece and the transverse damping piece are vertically connected, and the connecting point of the vertical damping piece and the transverse damping piece is positioned at the midpoint of the transverse damping piece;
the damping parts symmetrically arranged on the same horizontal plane comprise a left damping part and a right damping part; each part of damping piece is composed of a steel strand damping piece, a cylindrical damping piece and a hemispherical damping piece, wherein the steel strand damping piece is made of steel materials, the cylindrical damping piece is axially provided with a groove for fixing the steel strand, and the hemispherical damping piece is used for accommodating damping liquid media.
Preferably, the vertical damping piece comprises a steel strand connecting piece, a damping piece and a wire connecting piece which are sequentially arranged from bottom to top.
Preferably, the damping member is a curved serpentine metal plate.
Preferably, the steel strand connecting piece is provided with a through hole for fixing the steel strand and a bolt fixing hole connected with the vertical damping piece; the wire connecting piece is provided with a bolt fixing hole connected with the vertical damping piece and a through hole with a rubber ring arranged on the inner wall connected with the wire.
Preferably, the open end of the groove of the cylindrical damping piece is the open end of the outward flange; and a circular through hole with at least two diameters, which is perpendicular to the axial direction of the steel strand, is arranged in the hemispherical damping piece.
Preferably, the diameters of the through holes with the two diameters are respectively 1 mm-2 mm and 0.5 mm-1 mm, the sum of the areas with holes accounts for 40% -60% of the area of the whole separator, and the through holes with the two diameters are arranged at intervals
Preferably, the hemispherical damping element is made of Ti-15, mo-3, AI-2.7, nb-0.2, si.
Preferably, the closed end of the cylindrical damping member is flanged to the open end of the hemispherical damping member.
Preferably, the damping liquid medium is dimethyl silicone oil.
The application also provides a method for determining the mass of the damping liquid medium in the damper, which comprises the following steps:
obtaining acceleration resonance frequency based on an acceleration amplitude-frequency characteristic curve of the damper;
calculating a natural frequency according to the acceleration resonance frequency;
the mass of the damping liquid medium is calculated from the natural frequency.
Preferably, the calculation formula of the natural frequency is as follows;
wherein ω is acceleration resonance frequency, ω n Being the natural frequency of the shock absorber, ζ is the damping ratio of the shock absorber.
Preferably, the mass of the damping liquid medium is calculated according to the following formula:
m is in f To damp the mass of the liquid medium, w n Is the natural frequency of the shock absorber, k is the rigidity of the shock absorber, m 1 Is the structural mass of the body of the shock absorber.
Compared with the closest prior art, the application has the beneficial effects that:
1. the application provides a damper and a method for determining the mass of damping liquid medium in the damper, wherein the damper comprises damping pieces arranged vertically and horizontally, and the damping pieces arranged horizontally consist of damping pieces symmetrically arranged on the same horizontal plane; the vertical damping piece and the transverse damping piece are vertically connected, and the connecting point of the vertical damping piece and the transverse damping piece is positioned at the midpoint of the transverse damping piece. The damper has three energy consumption structures: namely a hemispherical damping piece containing damping liquid medium, a steel strand structure relying on friction energy dissipation among strands and a vertical damping piece with hysteresis energy dissipation capability. The three sets of energy consumption systems can dissipate vertical wind vibration energy, so that the two sets of energy consumption systems of the application can effectively reduce vertical wind vibration of a large-span wire in a span.
2. The novel damper provided by the application has the advantages of good automatic activation performance and capability of widening the vibration reduction frequency range. The damper uses the damping fluid vibration damper to cope with the current excitation frequency, and the steel stranded wire and the S-shaped energy-consuming metal plate cope with the excitation frequency possibly generated by the outside. The effective vibration reduction frequency bandwidth of the novel damper is improved by means of three damping vibration reduction systems. So that the damper can reduce the dynamic response caused by the vertical wind vibration of the wire in a wider frequency range.
3. The S-shaped energy-consumption metal plate in the novel damper provided by the application has the functions of buffering acting force between the damper and a power transmission wire, and further reducing the abrasion of the damper to the wire.
4. The baffle plate in the damping fluid energy dissipation device provided by the application adopts a half-moon-shaped structural design with two circular holes, and the structural design increases the resistance of damping fluid passing through the baffle plate and obviously increases the damping energy dissipation capacity of the damper.
5. The novel damper provided by the application has self-adaptive capability, and can change the parameters of the damper according to the change of external excitation, so that the natural frequency of the damper is consistent with the external excitation frequency, and a better damping effect is obtained.
6. The novel damper provided by the application has the characteristics of easiness in installation, no maintenance and good durability. The application designs the structure of the high damping liquid package, so that the high damping liquid package can be hung in the high air without oil leakage, and has the advantages of no maintenance and good durability.
7. The novel damper vertical wind vibration mechanical model provided by the application can be applied to finite element calculation of the wire and damper dynamic characteristics, the accuracy of damper dynamic characteristic calculation can be obviously improved by adopting the finite element calculation result of the model, and the calculation result and the test result are relatively close.
8. The method for identifying and optimizing the parameter test parameters of the novel vertical wind vibration mechanical model of the damper can identify the inherent frequency and damping ratio of each order of the damper and optimize the two parameters, thereby improving the energy consumption and vibration reduction effect of the damper.
9. The novel material is selected for the shell, so that the shell can be prevented from being corroded in a severe environment, and plastic deformation can be avoided under the influence of long-term micro-vibration and self-weight pressure.
Drawings
In order to more clearly illustrate the technical solutions of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a top view of a damper provided by the present application;
fig. 2 is a front view of the damper provided by the present application;
FIG. 3 is a diagram of a separator plate and hole pattern design provided by the present application;
fig. 4 is a front view of a wire clamp body provided by the application;
fig. 5 is a left side view of the wire clamp body provided by the application;
fig. 6 is a top view of a clip body provided by the present application;
fig. 7 is a mechanical model of the damper provided by the present application;
reference numerals:
1-wire clamp, 2-steel strand, 3-solid hammer, 4-hollow hammer, 5-damping fluid, 6-partition plate, 7-flange plate, 8-fastening bolt I, 9-steel sleeve, 10-tin seal, 11-energy consumption metal plate, 12-big hole, 13-small hole, 14-wire clamp pressing plate, 15-wire clamp body, 16-hinge pin, 17-steel strand hole, 18-fastening bolt II and 19-rubber.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are used as an orientation or positional relationship based on that shown in the drawings, merely to facilitate description of the application and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
Example 1
A damper comprising a vertical damper and a lateral damper, comprising: the transverse damping piece consists of damping pieces symmetrically arranged on the same horizontal plane; the vertical damping piece and the transverse damping piece are vertically connected, and the connecting point of the vertical damping piece and the transverse damping piece is positioned at the midpoint of the transverse damping piece. In this embodiment, the vertical damper is a wire clip 1.
The damping parts symmetrically arranged on the same horizontal plane comprise a left damping part and a right damping part; each part of damping piece comprises a steel strand damping piece made of steel materials, a cylindrical damping piece axially provided with a groove for fixing the steel strand, and a hemispherical damping piece for containing damping liquid medium, wherein the steel strand damping piece is made of steel materials and is sequentially arranged. In the embodiment, the steel strand damping piece is a steel strand 2, the cylindrical damping piece is a solid hammer head 3, the hemispherical damping piece is a hollow hammer head 4, and the damping liquid medium is damping liquid 5.
The vertical damping piece comprises a steel strand connecting piece, a damping piece and a wire connecting piece which are sequentially arranged from bottom to top. In this embodiment, the steel strand connecting piece is a steel strand hole 17, and the wire connecting piece is a wire clamp body 15.
The damping member is a curved serpentine metal plate. The serpentine metal plate bent in this embodiment is the dissipative metal plate 11.
The steel strand connecting piece is provided with a through hole for fixing the steel strand and a bolt fixing hole connected with the vertical damping piece; the wire connecting piece is provided with a bolt fixing hole connected with the vertical damping piece and a through hole with a rubber ring arranged on the inner wall connected with the wire. In this embodiment, the through holes of the steel strand connecting piece are steel strand holes 17, and the rubber ring is rubber 19.
The open end of the groove of the cylindrical damping piece is the open end of the outward flange; and a circular through hole with at least two diameters, which is perpendicular to the axial direction of the steel strand, is arranged in the hemispherical damping piece.
The diameters of the through holes with the two diameters are respectively 1 mm-2 mm and 0.5 mm-1 mm, the sum of the areas with holes accounts for 40% -60% of the area of the whole separator, and the through holes with the two diameters are arranged at intervals. In this embodiment, the diameter of 1 mm-2 mm is large hole 12, and the diameter of 0.5 mm-1 mm is small hole 13.
The hemispherical damping piece is made of Ti-15, mo-3, AI-2.7, nb-0.2 and Si.
The closed end of the cylindrical damping member is connected with the open end of the hemispherical damping member by flange 7.
The damping liquid medium is made of dimethyl silicone oil.
A method of determining the mass of a damping liquid medium in a damper, comprising:
obtaining acceleration resonance frequency based on an acceleration amplitude-frequency characteristic curve of the damper;
calculating a natural frequency according to the acceleration resonance frequency;
the mass of the damping liquid medium is calculated from the natural frequency.
The calculation formula of the natural frequency is as follows;
wherein ω is acceleration resonance frequency, ω n Being the natural frequency of the shock absorber, ζ is the damping ratio of the shock absorber.
The mass of the damping liquid medium is calculated according to the following formula:
m is in f To damp the mass of the liquid medium, w n Is the natural frequency of the shock absorber, k is the rigidity of the shock absorber, m 1 Is the structural mass of the body of the shock absorber.
The novel damper provided by the application adopts an assembled integral structure design. The integral structure of the damper consists of a steel strand 2, a hammer head and a wire clamp 1. The hammer head of the damper is formed by connecting a solid hammer head 3 and a hollow hammer head 4 through a flange 7, wherein the solid hammer head 3 and a steel strand 2 are in compression joint through a steel sleeve 9, and the tops of the solid hammer head 3 and the steel strand 2 are sealed together by tin 10; the hollow hammer 4 is internally provided with a set of damping fluid energy dissipation and vibration reduction device, the device is composed of a spherical hollow shell, a baffle 6 and damping fluid 5, the baffle 6 in the hollow hammer 4 adopts a half-moon-shaped structural design with two circular holes, the diameters of the two circular holes are respectively 1-2 mm and 0.5-1 mm, the sum of the areas of the holes accounts for 40-60% of the area of the whole baffle, the holes with two different diameters are arranged at intervals, and the resistance of the damping fluid passing through the baffle is increased by the structural design of the baffle, so that the damping energy dissipation capacity of the damper is obviously increased. The lower part of the wire clamp 1 is connected with a steel strand in a punching way, and a hammer head is connected with the steel strand in a riveting way, as shown in figures 1, 2 and 3.
Fig. 1, 2 and 3 show the overall structure of the novel damper. The hammer head of the damper is formed by connecting a solid hammer head 3 and a hollow hammer head 4 through a flange 7, wherein the solid hammer head 3 and a steel strand 2 are in compression joint through a steel sleeve 9, and the tops of the solid hammer head 3 and the steel strand 2 are sealed together by tin 10; the hollow hammer 4 is internally provided with a set of damping fluid energy dissipation and vibration reduction device, and the device consists of a spherical hollow shell, a baffle 6 and damping fluid 5. The baffle 6 in the hollow hammer 4 is provided with a big hole 12 and a small hole 13, the lower part of the wire clamp 1 is connected with a steel strand in a punching mode, and the hammer is connected with the steel strand in a riveting mode. The partition plate 6 inside the damper hollow hammer adopts a half-moon-shaped structural design with two kinds of circular holes, the diameters of the two kinds of circular holes are respectively 1-2 mm and 0.5-1 mm, the sum of the areas of the holes accounts for 40-60% of the area of the whole partition plate, and the design structure of the partition plate adopts a mode that holes with two different diameters are arranged at intervals, so that the resistance of damping liquid passing through the partition plate is increased, and the damping energy consumption capacity of the damping liquid is obviously increased.
The damper wire clamp 1 consists of a wire clamp body 15, an energy-consumption metal plate 11, a steel strand fastener and a fastening bolt 18. The end of the dissipative metal plate 11 is inserted into a groove provided in the clip body 15 and is connected to the clip body 15 by a fastening bolt 18 as shown in fig. 4, 5 and 6. The structural design mode of the wire clamp is provided. In addition, the bottom of the wire clamp is provided with a through hole through which the steel strand 2 passes and is connected with the wire clamp body 15 by crimping.
Fig. 4, 5 and 6 show the structural design of the wire clip. The wire clamp 1 consists of a wire clamp body 15, an energy-consumption metal plate 11, a steel strand fastener and a fastening bolt 18. The end of the energy-dissipating metal plate 11 is inserted into a groove formed in the wire clamp body 15, and is connected with the wire clamp body 15 through a fastening bolt 18, so that the wire clamp structure design mode is given. In addition, the bottom of the wire clamp is provided with a through hole through which the steel strand 2 passes and is connected with the wire clamp body 15 by crimping.
The application provides a multi-damping variable-mass damper. When the damper moves under the action of wind load, damping liquid in the damping liquid vibration reduction device moves to the opposite direction of damper movement due to inertia, so that pressure opposite to the damper movement direction is generated, the pressure acts on a transmission line through the damper, and the effect of reducing wind vibration of a transmission wire is further achieved; in addition, the viscosity of the damping fluid in the damping device can also play a role in dissipating wind energy, namely, the damper has a vibration reduction effect on the power transmission wire by utilizing dynamic water pressure generated by shaking of the fluid and energy consumption of the damping fluid. The mass of the horizontal vibration reducing device is changed by changing the liquid amount in the damping liquid box body, so that the natural frequency of the horizontal vibration reducing device is changed, the natural frequency of the horizontal vibration reducing device is consistent with the current horizontal wind vibration frequency, and the optimal damping effect is achieved. The built-in baffle of the hollow hammer increases the resistance of the flow of damping fluid, thereby further increasing the damping energy consumption effect. In addition, the steel strand wires of the damper dissipate vertical vibration energy through friction; the S-shaped metal connecting metal plate can dissipate vertical vibration energy through repeated axial expansion and contraction, and can reduce acting force between the damper and the wire, so that abrasion between the damper and the wire is reduced. Therefore, the novel damper provided by the application has the following functions: first, the power consumption ability is strong. The damper has three energy consumption mechanisms: the viscous damping energy consumption of damping fluid in the hollow hammer, the friction damping energy consumption among the steel strand wires and the hysteresis energy consumption of the S-shaped energy consumption metal plate. Second, there is a buffer of forces between the damper and the power transmission conductor, thereby reducing wear of the conductor to the damper. Thirdly, the frequency range for preventing the vertical vibration of the lead is wide, the damper has self-adaptive capability, and the parameter of the damper can be changed according to the change of external excitation, so that the natural frequency of the damper is consistent with the external excitation frequency, and a better broadband vibration reduction effect is obtained. Fourth, it is maintenance-free, and has good durability. The application designs the structure of the high damping liquid package, so that the high damping liquid package can be hung in the high air without oil leakage, and has the advantages of no maintenance and good durability. Fifth, the novel damper has the advantages of easy installation, good automatic activation performance, easy matching of frequency modulation and the like. The novel damper provided by the application has the advantages of good automatic activation performance and capability of widening the vibration reduction frequency range. The damper uses the damping fluid vibration damper to cope with the current excitation frequency, and the steel stranded wire and the S-shaped energy-consuming metal plate cope with the excitation frequency possibly generated by the outside. The effective vibration reduction frequency bandwidth of the novel damper is improved by means of three damping vibration reduction systems. So that the damper can reduce the dynamic response caused by the vertical wind vibration of the wire in a wider frequency range.
The mass of the novel damper is composed of a solid hammer head M 1 And the mass M of damping fluid in the hollow hammer head f Two parts. The damper is formed by friction damping C of steel strands 0 S-shaped metal plate hysteresis damping C 1 And viscous damping C generated by viscous damping liquid in the hollow hammer 2 Composition is prepared. The rigidity of the damper is K. The control force F of the damper to the vertical breeze vibration of the transmission conductor generally consists of two parts: part is the interaction force F between the wire and the damper 1 And F generated by damping fluid in hollow hammer 1 Control force F in opposite directions 2 The composition is shown in figure 7.
Figure 7 shows a mechanical model of the damping device. It can be seen that: the mass of the damper is composed of a solid hammer head M 1 And the mass M of damping fluid in the hollow hammer head f Two parts. The damper is formed by friction damping C of steel strands 0 S-shaped metal plate hysteresis damping C 1 And viscous damping C generated by viscous damping liquid in the hollow hammer 2 Composition is prepared. The rigidity of the damper is K. The control force F of the damper to the vertical breeze vibration of the transmission conductor generally consists of two parts: part is the interaction force F between the wire and the damper 1 And F generated by damping fluid in hollow hammer 1 Control force F in opposite directions 2 Composition of the composition
The differential equation of motion of the variable mass novel damper can be written as:
in the working process of the damper, the following steps are provided: mass M of viscous damping fluid inside the hollow hammer f Can be between 0 and M fmax The range is adjusted according to the external excitation condition, so that the variable range of the mass of the damper is M 1 To M 1+ M fmax . Therefore, the natural frequency ω of the damper n The method comprises the following steps:
as can be seen from equation 2: when the mass M of the liquid f From 0 to M fmax Natural frequency omega of damper when changing in range n And also changes with the range ofTo->Therefore, when the frequency ω of the outside world is located +.>To->When the damping fluid is within the range, the natural frequency of the damping fluid can be kept consistent with the external frequency omega by adjusting the mass of the damping fluid in the damping fluid device, so that the energy consumption capacity of the damper is maximized. The novel damper vertical wind vibration mechanical model provided by the application can be applied to finite element calculation of the wire and damper dynamic characteristics, the accuracy of damper dynamic characteristic calculation can be obviously improved by adopting the finite element calculation result of the model, and the calculation result and the test result are relatively close.
The modal mass of the damping fluid basic vibration mode is generally 1% -10% of the modal mass of the damper.
From the above mechanical model, it can be seen that: the damper can obtain the best horizontal wind vibration reduction effect by only adjusting the mass of the liquid of the horizontal damper so that the natural frequency of the damper is consistent with the external frequency. In order to measure the damping and the natural frequency of the damper, the application designs a set of test device. The device consists of an electromagnetic vibration table, a damper, an acceleration sensor and the like. The vibration damper is rigidly fixed on an electromagnetic vibration table, sinusoidal sweep excitation is carried out on the vibration damper, the frequency range is 5-120 Hz, the exciting force of the vibration table on the vibration damper is obtained by a force sensor, the acceleration of a wire clamp is obtained by an acceleration sensor, the wire clamp speed is obtained by integration, and the frequency, the speed, the force and the phase difference of a data acquisition card in each acquisition period are synchronously recorded, so that the impedance spectrum of the vibration damper under different vibration speeds is obtained. According to the impedance spectrum obtained by the experiment, the inherent frequencies of each step of the damper under different excitation speeds, the corresponding impedance value and half power point can be obtained.
The application adopts a single-mode identification method to identify the inherent frequency and damping ratio of each order from a frequency response function curve. Calculating damping ratio of damper by half-power point method, setting f n ，R e Respectively the natural frequency and the corresponding impedance value, the half power point is R e A corresponding point of/2, which corresponds to a frequency f a ，f b Respectively at f n Damping ratio corresponding to natural frequency of vibration damper at two sides is
In the vibration process, the aim of widening the frequency reduction band of the damper is achieved by changing the mass of the damping fluid loaded by the novel damper. The frequency range of the novel vibration damper for effectively damping the lead is 10 Hz-80 Hz, and the damping ratio range is as follows: 0.05 to 0.2.
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 adopted, and the resonance method is a method for estimating a natural frequency by utilizing a relation between the natural frequency and the resonance frequency. The resonance frequency is an excitation frequency corresponding to when the response amplitude reaches a maximum value by resonating the vibration system. The response of the shock absorber is acceleration, then referred to as the acceleration resonant frequency. In the experiment of identifying the natural frequency of the vibration absorber, the acceleration amplitude frequency characteristic curve of the vibration absorber needs to be measured, the acceleration resonance frequency omega of the vibration absorber is determined through the curve, and then the natural frequencies of the vibration absorber can be obtained by solving according to a calculation formula 4 of the natural frequenciesIs omega n 。
Wherein ω is acceleration resonance frequency, ω n Being the natural frequency of the shock absorber, ζ is the damping ratio of the shock absorber.
It will be appreciated by those skilled in the art that 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 flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations 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 application, and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the scope of the claims of the present application as filed.
Claims (8)
1. A damper comprising a vertical damper disposed vertically and a lateral damper disposed laterally, comprising: the transverse damping piece consists of damping pieces symmetrically arranged on the same horizontal plane; the vertical damping piece and the transverse damping piece are vertically connected, and the connecting point of the vertical damping piece and the transverse damping piece is positioned at the midpoint of the transverse damping piece;
the damping parts symmetrically arranged on the same horizontal plane comprise a left damping part and a right damping part; each part of damping piece comprises a steel strand damping piece, a cylindrical damping piece and a hemispherical damping piece, wherein the steel strand damping piece is made of steel, the cylindrical damping piece is axially provided with a groove for fixing the steel strand, and the hemispherical damping piece is used for accommodating damping liquid medium;
the vertical damping piece comprises a steel strand connecting piece, a damping piece and a wire connecting piece which are sequentially arranged from bottom to top;
the damping piece in the vertical damping piece is a bent serpentine metal plate;
the steel strand connecting piece is provided with a through hole for fixing the steel strand and a bolt fixing hole connected with the vertical damping piece; the wire connecting piece is provided with a bolt fixing hole connected with the vertical damping piece and a through hole with a rubber ring on the inner wall connected with the wire;
the open end of the groove of the cylindrical damping piece is the open end of the outward flange; and a circular through hole with at least two diameters, which is perpendicular to the axial direction of the steel strand, is arranged in the hemispherical damping piece.
2. The damper of claim 1, wherein the two diameters are 1mm to 2mm and 0.5mm to 1mm, respectively, and the sum of the hole areas is 40% to 60% of the area of the partition plate, and the through holes of the two diameters are arranged at intervals.
3. The damper of claim 1, wherein the hemispherical damper is made of Ti-15, mo-3, AI-2.7, nb-0.2, si.
4. The damper of claim 1, wherein the closed end of the cylindrical damping member is flanged to the open end of the hemispherical damping member.
5. The damper of claim 1, wherein the damping liquid medium material is simethicone.
6. A method of determining the mass of damping liquid medium in a damper according to any one of claims 1-5, comprising:
obtaining acceleration resonance frequency based on an acceleration amplitude-frequency characteristic curve of the damper;
calculating a natural frequency according to the acceleration resonance frequency;
the mass of the damping liquid medium is calculated from the natural frequency.
7. The method of claim 6, wherein the natural frequency is calculated by the formula;
wherein ω is acceleration resonance frequency, ω n Being the natural frequency of the shock absorber, ζ is the damping ratio of the shock absorber.
8. The method of claim 6, wherein the mass of the damping liquid medium is calculated as:
m is in f To damp the mass of the liquid medium, w n Is the natural frequency of the shock absorber, k is the rigidity of the shock absorber, m 1 Is the structural mass of the body of the shock absorber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910926083.XA CN112582962B (en) | 2019-09-27 | 2019-09-27 | Damper and method for determining mass of damping liquid medium in damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910926083.XA CN112582962B (en) | 2019-09-27 | 2019-09-27 | Damper and method for determining mass of damping liquid medium in damper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112582962A CN112582962A (en) | 2021-03-30 |
| CN112582962B true CN112582962B (en) | 2023-09-08 |
Family
ID=75110625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910926083.XA Active CN112582962B (en) | 2019-09-27 | 2019-09-27 | Damper and method for determining mass of damping liquid medium in damper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112582962B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113889956B (en) * | 2021-09-28 | 2022-04-29 | 山东大学 | Energy feedback type multiple energy consumption damper |
| CN114811268A (en) * | 2022-01-27 | 2022-07-29 | 海洋石油工程股份有限公司 | Magnetic absorption type vibration reduction hammer |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2676472Y (en) * | 2004-01-18 | 2005-02-02 | 桂林市天地光纤通信有限公司 | Anti-vibration hammer for overhead line and ADSS/OPGW optical fiber |
| CN202535011U (en) * | 2012-02-15 | 2012-11-14 | 广东电网公司电力科学研究院 | Novel electric transmission line vibration damper with damping fluid |
| CN104078908A (en) * | 2014-06-23 | 2014-10-01 | 湖南科技大学 | Liquid-filled anti-vibration hammer capable of frequency modulation |
| CN104242211A (en) * | 2014-10-17 | 2014-12-24 | 国网辽宁省电力有限公司阜新供电公司 | Device for comprehensively preventing guide line from oscillating |
| CN206195307U (en) * | 2016-12-01 | 2017-05-24 | 三峡大学 | But damper that usable viscous damping shakes |
| CN208971099U (en) * | 2018-10-19 | 2019-06-11 | 中铁大桥科学研究院有限公司 | A kind of impact energy consumption damper |
| CN209088492U (en) * | 2018-10-16 | 2019-07-09 | 国家电网公司 | A kind of high-voltage line damper |
-
2019
- 2019-09-27 CN CN201910926083.XA patent/CN112582962B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2676472Y (en) * | 2004-01-18 | 2005-02-02 | 桂林市天地光纤通信有限公司 | Anti-vibration hammer for overhead line and ADSS/OPGW optical fiber |
| CN202535011U (en) * | 2012-02-15 | 2012-11-14 | 广东电网公司电力科学研究院 | Novel electric transmission line vibration damper with damping fluid |
| CN104078908A (en) * | 2014-06-23 | 2014-10-01 | 湖南科技大学 | Liquid-filled anti-vibration hammer capable of frequency modulation |
| CN104242211A (en) * | 2014-10-17 | 2014-12-24 | 国网辽宁省电力有限公司阜新供电公司 | Device for comprehensively preventing guide line from oscillating |
| CN206195307U (en) * | 2016-12-01 | 2017-05-24 | 三峡大学 | But damper that usable viscous damping shakes |
| CN209088492U (en) * | 2018-10-16 | 2019-07-09 | 国家电网公司 | A kind of high-voltage line damper |
| CN208971099U (en) * | 2018-10-19 | 2019-06-11 | 中铁大桥科学研究院有限公司 | A kind of impact energy consumption damper |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112582962A (en) | 2021-03-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112582962B (en) | Damper and method for determining mass of damping liquid medium in damper | |
| WO2018196276A1 (en) | Ultralow frequency tuned liquid mass damper | |
| CN110296182B (en) | Tuned mass damper vibration reduction system incorporated into nonlinear energy trap | |
| JP6669648B2 (en) | Self-tuning mass damper and system including the same | |
| CN209619825U (en) | Suspension bridge damping rope | |
| AU2008306161A1 (en) | Liquid damper for reducing vertical and/or horizontal vibrations in a building or machine structure | |
| CN110566616A (en) | passive variable-rigidity non-smooth vibration absorber | |
| Ko et al. | Field vibration tests of bridge stay cables incorporated with magnetorheological (MR) dampers | |
| CN209483859U (en) | Land wind-driven generator tower damping rope | |
| CN111140616A (en) | Negative stiffness enhanced nonlinear vibration absorber | |
| CN112576678B (en) | Vertical vibration absorber and method for determining mass of damping fluid medium in vertical vibration absorber | |
| EP2314770A1 (en) | Semi-active system for vibration suppression in pedestrian footbridges and such like | |
| WO2015017792A1 (en) | Method for suppression of resonant vibrations in subsea pipelines | |
| CN112576676B (en) | Horizontal vibration damper | |
| CN210838892U (en) | Inertia amplification type transmission line vibration damping cable | |
| CN109599820B (en) | Anti-galloping-twisting turning eddy current mass damper and optimization method | |
| CN206752724U (en) | A kind of intelligent temperature control tuned mass damper, TMD | |
| CN110649551A (en) | Inertia amplification type transmission line vibration damping cable | |
| RU2533657C1 (en) | Vibration damper | |
| RU2249893C1 (en) | Ice and conductor vibration limiter for overhead power transmission lines | |
| KR100994175B1 (en) | Hybrid isolator | |
| CN114629070B (en) | Electric transmission wire breeze vibration control liquid frequency modulation quality eddy current vibration damper | |
| CN211257389U (en) | Building quality-adjusting damper | |
| CN111608455B (en) | Three-dimensional shock insulation system | |
| CN208056367U (en) | A kind of easy-to-dismount vibration absorber |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |