CN106644330B - A kind of scaling method of transformer station's composite sleeve antidetonation ultimate bearing force parameter - Google Patents
A kind of scaling method of transformer station's composite sleeve antidetonation ultimate bearing force parameter Download PDFInfo
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- CN106644330B CN106644330B CN201510725097.7A CN201510725097A CN106644330B CN 106644330 B CN106644330 B CN 106644330B CN 201510725097 A CN201510725097 A CN 201510725097A CN 106644330 B CN106644330 B CN 106644330B
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0005—Repeated or cyclic
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0023—Bending
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
Abstract
The present invention relates to a kind of scaling method of transformer station's composite sleeve antidetonation ultimate bearing force parameter, including：To the first product of composite sleeve, the experiment of earthquake simulation bumper and Quintic system beam test are carried out respectively, respectively obtains antidetonation ultimate bearing capacity Mse and ultimate flexural strength Mst；Conversion coefficient r is calculated by the antidetonation ultimate bearing capacity Mse and ultimate flexural strength Mst；For the non-first batch products of the composite sleeve, Quintic system beam test is carried out, obtains ultimate flexural strength Mst '；Antidetonation ultimate bearing capacity Mse ' is obtained by the conversion coefficient r.Anti-seismic performance detection importance with reality of the technical solution of the present invention to composite sleeve.
Description
Technical field：
The present invention relates to high voltage electric equipment anti-seismic performance technical field of measurement and test, is more particularly to a kind of transformer station's composite wood
Expect the scaling method of sleeve pipe antidetonation ultimate bearing force parameter.
Background technology：
Traditional converting station high voltage electrical apparatus sleeve pipe uses electroceramics material, and electroporcelain material is because of fragility attribute, easily on ground
Damaged in shake event.Composite sleeve is the substitute products of porcelain bushing, and it passes through Matrix Fiberglass Composite Explosive set
Pipe and metal end tool are formed by epoxy resin colloid gluing.It is compound due to the excellent mechanical performances of glass fiber compound material
Being considered to have good anti-seismic performance of material bushing and be that highlight lines area transformer station preferentially selects.
In earthquake resistant engineering design, ultimate bearing capacity of the component under earthquake load is structural system earthquake-resistant capacity
Important parameter.However, the composite sleeve as electrical equipment important feature component, the demarcation of its antidetonation ultimate bearing capacity
Method is but more short of, and is embodied in following aspect
(1) in shaking-table test, it is difficult to carry out the load carrying capacity test under limiting condition.
In the seismographic station experiment of composite sleeve, often to set the vibration amplitude of grade as target, apparatus for checking is
It is no to bear associated ratings earthquake load.However, the demarcation of ultimate bearing capacity, it is necessary to make tried equipment reach damage it is critical
State.By conventional test method, can input the method for amplitude by increasing to general composite sleeve equipment makes to be tried
Test equipment and reach bearing capacity critical condition, and for other equipment component, often limited by earthquake simulation bumper capacity of equipment
Make and the test under damage limit state can not be carried out.In this case, increase ancillary test device, realize that ultimate bearing capacity is surveyed
Try and demarcate and simple and easy have great importance.
(2) single test costs dearly, and dependence test project is difficult to promote.
Due to the testing expenses of single earthquake simulation bumper costly, while correlation test equipment popularity is low, only
In part, professional shock test research unit satisfies the requirements, and general electrical equipment manufacturer does not possess related examination to detection unit
Test condition.In this case, earthquake simulation bumper test method is only capable of using in type approval test, it is difficult in link is inspected by random samples
Promote.Design easy test method and carry out antidetonation ultimate bearing capacity test, the anti-seismic performance of composite sleeve is detected
Importance with reality.
The content of the invention：
It is an object of the invention to provide a kind of scaling method of transformer station's composite sleeve antidetonation ultimate bearing force parameter,
Orderliness is clear, workable.
To achieve the above object, the present invention uses following technical scheme：A kind of transformer station's composite sleeve antidetonation limit
The scaling method of force parameter is carried, including：
To the first product of composite sleeve, the experiment of earthquake simulation bumper and Quintic system beam test are carried out respectively,
Respectively obtain antidetonation ultimate bearing capacity Mse and ultimate flexural strength Mst；
Conversion coefficient r is calculated by the antidetonation ultimate bearing capacity Mse and ultimate flexural strength Mst；
For the non-first batch products of the composite sleeve, Quintic system beam test is carried out, beaming resistance limit is obtained and holds
Carry power Mst '；Antidetonation ultimate bearing capacity Mse ' is obtained by the conversion coefficient r.
The conversion coefficient is determined by following formula：
R=Mse/Mst.
The device of the earthquake simulation bumper experiment includes being arranged on the counterweight at the top of the composite sleeve test specimen
Frame and the base for being arranged on the composite sleeve test specimen bottom；On the composite sleeve test specimen be provided with strain gauge and
Accelerometer；Accelerometer is provided with the table top for placing described device and on counterweight frame.
Flange is respectively equipped with the top and bottom of the composite sleeve test specimen；The flange passes through bolt and institute respectively
Base is stated to connect with counterweight frame.
The strain gauge is symmetrically axially separately positioned on the outside of the flange in the bottom of the composite sleeve test specimen and described
Surveyed in flange in the bottom；The strain gauge is axially disposed within the composite sleeve test piece upper part, close to the top flange
Outside, the composite sleeve test piece lower part, close to the outside of the flange in the bottom and the composite sleeve test specimen
On the outside of middle part；The accelerometer be arranged on the composite sleeve height of specimen 1/4,1/2 sum 3/4 outside,
The middle part of the counterweight frame, the outside of the top flange, the outside of the flange in the bottom and the composite sleeve test specimen
Bottom, close to the outside of the flange in the bottom.
During earthquake simulation bumper experiment, apply earthquake load step by step, when the seismic wave of input is recommends
Cheng Bo reports selection artificial time history's ripple or practically seismic wave by seismic safety evaluation for engineering sites；Input acceleration peak value is from 0.1g
Rise, earthquake load is increased step by step by amplification of 0.1g, until the composite sleeve test specimen reaches the bearing capacity limit and occurred
Damage；
Judge holding for the composite sleeve test specimen in the earthquake simulation bumper is tested according to following methods
Carry the power limit：Strain time history of the composite sleeve test specimen on the outside of its flange in the bottom is monitored, not up to described multiple
During condensation material sleeve pipe test specimen limit of bearing capacity, the curve symmetric of the strain time history；Reaching the composite sleeve examination
During the part limit, the curve of the strain time history is distorted；Choosing the operating mode when curve of the strain time history is distorted is
The operating mode that the bearing capacity limit occurs；The peak value for the period of right time seismic response that distorted under the operating mode is taken to be calculated for limit of bearing capacity
Foundation.
Remember that the counterweight frame and weight mass are m1, flange in the bottom distance is h1 described in counterweight frame centre-to-centre spacing, takes described match somebody with somebody
Bearing capacity limit acceleration peak value of response is a1 at weight frame center；Remember composite sleeve test specimen upper segment quality for m2,
The quality of middle part is m3-m5 and the quality of lower section is m6；The upper segment is the top by top flange down to described
At 2 times of top flange height；The lower section is the bottom by flange in the bottom upwards to 2 times of the flange in the bottom height
Place；The middle part is the removing upper segment and lower section；The middle part is equally divided into three sections, quality from top to bottom
M3, m4 and m5 are designated as successively；The acceleration peak value of each section of quality of the composite sleeve test specimen from top to bottom corresponds to respectively
For a2-a6；The Ultimate Bearing Capacity Mse of the composite sleeve test specimen, is determined by following formula：
The device of the Quintic system beam test includes the base for being arranged on the composite sleeve test specimen bottom and led to
Cross the actuator that loading end fixing device is connected with the composite sleeve test specimen；Set on the composite sleeve test specimen
There is strain gauge；Displacement Meters are set in loading end position, for measuring the horizontal displacement of loading end.
The bottom of the composite sleeve test specimen is provided with flange；The flange is connected by bolt with the base；Institute
It is fixture to state loading end fixing device, including for connect the composite sleeve test specimen and actuator can pretension embrace
Hoop；The actuator applies thrust to its cantilever end；The strain gauge is symmetrically axially separately positioned on the composite sleeve
Surveyed on the outside of the flange in the bottom of test specimen and in the flange in the bottom；The strain gauge is axially disposed within the composite sleeve test specimen
Top, close to the outside of the top flange, the composite sleeve test piece lower part, close to the outside of the flange in the bottom and
On the outside of the middle part of the composite sleeve test specimen.
During the Quintic system beam test, its cantilever is further applied load by the actuator, by displacement control
Loading capacity processed, the rate of application of the load is 5mm/min, by unidirectionally loading or back and forth loading, until the test specimen occurs
Destroy, and its depression of bearing force is 80% of maximum load capacity when not destroying when the test specimen destroys；It is described past when carrying out
When being added with load, each rank displacement increment is 10mm；
Judge as follows in the Quintic system beam test, the composite sleeve test specimen bearing capacity pole
Limit：Take the loading end movement d- loading force F curves that the Quintic system beam test obtains, the loading end movement d- loading forces F
Curve is made up of linear rise section, plasticity ascent stage and descending branch, and line taking segment endpoint is limit of bearing capacity point, is remembered now
Load deflection is dy, loading force Fy；And ultimate bearing force value Mst of the composite bushing in Quintic system beam test is obtained, lead to
Cross following formula determination：
Mst=Fy*h
Wherein, h is distance of the loading end to flange in the bottom.
With immediate prior art ratio, the present invention, which provides technical scheme, has following excellent effect
1st, technical solution of the present invention reduces seismographic station pilot project to non-first batch products, is ensureing result validity
Under the premise of simplify experiment process；
2nd, technical solution of the present invention saves testing expenses；
3rd, technical solution of the present invention can not only use in type approval test, can also be promoted in link is inspected by random samples；
4th, technical solution of the present invention is choosing the composite sleeve energy of more preferable performance, has great importance；
5th, technical solution of the present invention reduces spoilage of the composite sleeve in earthquake.
Brief description of the drawings
Fig. 1 is single-unit composite sleeve of embodiment of the present invention seismographic station experimental rig structural representation；
Fig. 2 is the understructure top view of the embodiment of the present invention；
Fig. 3 is the understructure front view of the embodiment of the present invention；
Fig. 4 is counterweight mount structure front view of the embodiment of the present invention；
Fig. 5 is counterweight mount structure upward view of the embodiment of the present invention；
Fig. 6 is not reached the limit of under state for the embodiment of the present invention, foil gauge curve map；
Fig. 7 is foil gauge curve map under the limiting condition of the embodiment of the present invention；
Fig. 8 is foil gauge curve map schematic diagram under the limiting condition of the embodiment of the present invention；
Fig. 9 is composite bushing Ultimate Strength schematic diagram during the seismographic station of the embodiment of the present invention is tested；
Figure 10, which is that the single-unit of the embodiment of the present invention is compound, discusses sleeve pipe Quintic system beam test schematic device；
Figure 11 is the loading end movement d- loading force F curve synoptic diagrams of the embodiment of the present invention；
Wherein, 1- counterweights frame, 2- composite sleeve test specimens, 3- bases, 4- mounting holes, 5- holes for hoist.
Embodiment
With reference to embodiment, the invention will be described in further detail.
Embodiment 1：
The invention of this example provides a kind of scaling method of transformer station's composite sleeve antidetonation ultimate bearing force parameter, bag
Include：
1) to the first product of the composite sleeve of certain specification, the experiment of earthquake simulation bumper and Quintic system are carried out respectively
Beam test, antidetonation ultimate bearing capacity Mse and ultimate flexural strength Mst are respectively obtained, calculate conversion coefficient
R=Mse/Mst
2) for the non-first batch of composite sleeve product of certain specification, you can only carry out Quintic system beam test, pass through
Conversion coefficient obtains antidetonation ultimate bearing capacity Mse '=r*Mst '.
Now the foundation of above-mentioned bearing capacity scaling method is illustrated.Transformer station's composite sleeve under earthquake load
Failure mode is generally bending failure pattern, shows as continuous damage of the sleeve pipe between metal flange, composite sleeve
Destroy or ring flange is in the destruction of flange cylinder.It should be noted that although failure mode is all bending failure pattern, earthquake lotus
Carry because it is dynamic impact load, it is variant with static load.So the limit obtained in the experiment of earthquake simulation bumper is held
Load power Mse and the ultimate bearing capacity Mst obtained in pseudo-static experimental are variant.And in the different batches of product of specification of the same race, because
Which employs identical structure and material, and the difference trend between Mse and Mst is consistent.So in demarcation r=Mse/Mst
Afterwards, for the sampling observation of different batches of product, composite sleeve can be obtained by way of modified quasi Static Test Results
Antidetonation ultimate bearing capacity.
Single-unit composite sleeve seismographic station experimental rig
Experimental rig is as shown in figure 1, its main body is made up of composite sleeve test specimen 2, counterweight frame 1 and connect base 3, respectively
It is bolted between part；Test measurement device includes strain gauge and accelerometer.
Connect base 3 is used to connect examination vibration table and test specimen, such as Fig. 2-Fig. 3, its bottom upper and lower end face and ribbed stiffener
Thickness of slab is more than 2cm, so as to which connect base has larger rigidity；The flange in the bottom of composite sleeve test specimen 2 is connected with base, top
Portion's flange is connected with counterweight frame 1；For counterweight frame 1 to be square, bottom plate and wall thickness preferably take 5-10mm, such as Fig. 4-Fig. 5, according to applying counterweight
Quality Design its size；Strain gauge by test specimen axial direction bond, measurement position be respectively symmetric position on the outside of flange in the bottom,
Symmetric position, outside of sleeve outside, the close top of outside of sleeve in the middle part of flange in the bottom end position, sleeve pipe on the inside of sleeve bottom
Portion flange position；Accelerometer measures direction of vibration and the vibration time-histories in vertical vibration direction, installation site is table top, test specimen is each
1/4 opening position, test specimen sleeve surface are at flange in the bottom and in the middle part of counterweight frame.
The quality of counterweight frame 1 can select as follows, and it is 750kg that 220kV composite bushings, which apply counterweight, and 500kV is compound
It is 1500kg that sleeve pipe, which applies counterweight, and more than 500kV equipment, which applies counterweight, should separately calculate determination.
The judgement and the demarcation of ultimate bearing force value of composite bushing ultimate limit states in the experiment of seismographic station
During being tested in seismographic station, earthquake load should be applied step by step, input-to-state stabilization is for recommendation time-histories ripple or by place
Seismic Safety Assessment Report selects artificial time history's ripple or practically seismic wave, input acceleration peak value from 0.1g, using 0.1g as
Amplification increases earthquake load step by step, until test specimen reaches ultimate limit state and damaged.
Composite bushing ultimate limit state is according to following rule judgment in the experiment of seismographic station：The bottom of close on the outside of monitoring sleeve
The strain time history of portion flange end position, in not up to ultimate limit states, the strain time history curve of the position is basic
Symmetrically, such as Fig. 6；Under limiting condition, larger distortion occurs for foil gauge curve, such as Fig. 7 and 8；Strain time history curve is chosen to occur
The operating mode that distorts is the operating mode that ultimate limit state occurs, such as 1.88g operating modes in Fig. 7；Take the period of right time is distorted under the operating mode
The peak value answered is rung, such as the 8-10s periods in Fig. 7, the foundation calculated for ultimate limit states.
Composite bushing ultimate bearing capacity is calculated by following rule in the experiment of seismographic station：Such as Fig. 9, note counterweight frame 1 is with matching somebody with somebody heavy
Measure as m1, the centre-to-centre spacing casing flange of counterweight frame 1 distance is h1, takes at this that acceleration responsive peak value is under ultimate limit state
a1；The quality for remembering the upper segment of composite bushing is m2, the quality of middle part is m3-m5 and the quality of lower section is m6；On described
Section is 2 times by the top of top flange down to the top flange height；The lower section is by flange in the bottom
Bottom is arrived at 2 times of the flange in the bottom height upwards；The middle part is the removing upper segment and lower section；In described
Section is equally divided into three sections, and quality from top to bottom is designated as m3, m4 and m5 successively；The composite sleeve test specimen is from top to bottom
The acceleration peak value of each section of quality be a2-a6；The Ultimate Bearing Capacity Mse for obtaining test specimen is：
Wherein, acceleration peak value a2-a6 is corresponded to obtained from following accelerometer respectively；It is placed on the outside of top flange
Accelerometer, be arranged on the composite sleeve height of specimen 1/4,1/2 sum 3/4 outside accelerometer, set
Put in the composite sleeve test piece lower part, the accelerometer close to the outside of the flange in the bottom.
Single-unit composite sleeve Quintic system beam test device
Single-unit is compound to discuss that sleeve pipe Quintic system beam test device is as shown in Figure 10, and experimental rig main body is divided into four portions
Divide, respectively connect base 3, composite sleeve test specimen 2, loading end fixture and actuator；Test measurement device includes strain
Measurement apparatus and displacement measuring device.
Wherein, connect base be used for fix test specimen, test specimen is stood in connect base 3, and is bolted；Loading
Hold fixture be one can pretension anchor ear device, for connecting composite sleeve test specimen 2 and actuator；Actuator is outstanding for applying
Arm end thrust.For the measurement position of strain gauge with described in the experiment of seismographic station, displacement measuring device is arranged in loading in measurement apparatus
Position, measure the horizontal displacement of loading end.
The judgement of composite bushing ultimate limit states and the demarcation of ultimate bearing force value in Quintic system beam test
During experiment, overhung load is applied by actuator, by displacement controlled loading, load rate of application can be with
For 5mm/min, it can select unidirectionally to be loaded or back and forth loaded that (each rank displacement increment can be for during reciprocal loading
10mm), until test specimen destroys, and depression of bearing force is the 80% of maximum load capacity.
The judgement of ultimate limit states is carried out as follows：Take the loading end movement d- loading forces F that experiment obtains
Curve, as shown in figure 11, curve may have a different mode in the shape of loading later stage curve, but early stage curve shape typically compared with
For unification.Curve is risen by linear end, plasticity ascent stage and descending branch form, and line taking segment endpoint is ultimate limit states
Point, remember that load deflection now is dy, loading force Fy.
Obtaining ultimate bearing force value Mst of the composite bushing in Quintic system beam test is
Mst=Fy*h
Finally it should be noted that：The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, institute
The those of ordinary skill in category field with reference to above-described embodiment although should be understood：Still can be to the embodiment of the present invention
Modify or equivalent substitution, these are without departing from any modification of spirit and scope of the invention or equivalent substitution, in Shen
Within claims of the invention that please be pending.
Claims (8)
- A kind of 1. scaling method of transformer station's composite sleeve antidetonation ultimate bearing force parameter, it is characterised in that：Including：To the first product of composite sleeve, the experiment of earthquake simulation bumper and Quintic system beam test are carried out respectively, respectively Obtain antidetonation ultimate bearing capacity Mse and ultimate flexural strength Mst；Conversion coefficient r is calculated by the antidetonation ultimate bearing capacity Mse and ultimate flexural strength Mst；For the non-first batch products of the composite sleeve, Quintic system beam test is carried out, obtains ultimate flexural strength Mst’；Antidetonation ultimate bearing capacity Mse ' is obtained by the conversion coefficient r；The device of earthquake simulation bumper experiment include being arranged on counterweight frame at the top of the composite sleeve test specimen and It is arranged on the base of the composite sleeve test specimen bottom；Strain gauge and acceleration are provided with the composite sleeve test specimen Degree meter；Accelerometer is provided with the table top for placing described device and on counterweight frame；The device of the Quintic system beam test includes being arranged on the base of the composite sleeve test specimen bottom and by adding Carry the actuator that end fixing device is connected with the composite sleeve test specimen；Being provided with the composite sleeve test specimen should Become meter；Displacement Meters are set in loading end position, for measuring the horizontal displacement of loading end.
- 2. a kind of scaling method of transformer station's composite sleeve antidetonation ultimate bearing force parameter as claimed in claim 1, its It is characterised by：The conversion coefficient is determined by following formula：R=Mse/Mst.
- 3. a kind of scaling method of transformer station's composite sleeve antidetonation ultimate bearing force parameter as claimed in claim 1, its It is characterised by：Flange is respectively equipped with the top and bottom of the composite sleeve test specimen；The flange respectively by bolt with The base connects with counterweight frame.
- 4. a kind of scaling method of transformer station's composite sleeve antidetonation ultimate bearing force parameter as claimed in claim 3, its It is characterised by：The strain gauge is symmetrically axially separately positioned on the outside of the flange in the bottom of the composite sleeve test specimen and described On the inside of flange in the bottom；The strain gauge is axially disposed within the composite sleeve test piece upper part, close to the top flange Outside, the composite sleeve test piece lower part, close to the outside of the flange in the bottom and the composite sleeve test specimen On the outside of middle part；The accelerometer be arranged on the composite sleeve height of specimen 1/4,1/2 sum 3/4 outside, The middle part of the counterweight frame and the composite sleeve test piece lower part, close to the outside of the flange in the bottom.
- 5. a kind of scaling method of transformer station's composite sleeve antidetonation ultimate bearing force parameter as claimed in claim 4, its It is characterised by：During earthquake simulation bumper experiment, apply earthquake load step by step, when the seismic wave of input is recommends Cheng Bo reports selection artificial time history's ripple or practically seismic wave by seismic safety evaluation for engineering sites；Input acceleration peak value is from 0.1g Rise, earthquake load is increased step by step by amplification of 0.1g, until the composite sleeve test specimen reaches the bearing capacity limit and occurred Damage；The bearing capacity of the composite sleeve test specimen in the earthquake simulation bumper is tested is judged according to following methods The limit：Strain time history of the composite sleeve test specimen on the outside of its flange in the bottom is monitored, in not up to described composite wood When expecting sleeve pipe test specimen limit of bearing capacity, the curve symmetric of the strain time history；Reaching the composite sleeve test specimen pole In limited time, the curve of the strain time history is distorted；It is carrying to choose the operating mode when curve of the strain time history is distorted The operating mode that the power limit occurs；Take under the operating mode distort period of right time seismic response peak value for limit of bearing capacity calculate according to According to.
- 6. a kind of scaling method of transformer station's composite sleeve antidetonation ultimate bearing force parameter as claimed in claim 5, its It is characterised by：Remember that the counterweight frame and weight mass are m1, flange in the bottom distance is h1 described in counterweight frame centre-to-centre spacing, takes described match somebody with somebody Bearing capacity limit acceleration peak value of response is a1 at weight frame center；Remember composite sleeve test specimen upper segment quality for m2, The quality of middle part is m3-m5 and the quality of lower section is m6；The upper segment is the top by top flange down to described At 2 times of top flange height；The lower section is the bottom by flange in the bottom upwards to 2 times of the flange in the bottom height Place；The middle part is the removing upper segment and lower section；The middle part is equally divided into three sections, quality from top to bottom M3, m4 and m5 are designated as successively；Each section of the acceleration peak value of the composite sleeve test specimen from top to bottom corresponds to a2- respectively a6；The Ultimate Bearing Capacity Mse of the composite sleeve test specimen, is determined by following formula：
- 7. a kind of scaling method of transformer station's composite sleeve antidetonation ultimate bearing force parameter as claimed in claim 1, its It is characterised by：The bottom of the composite sleeve test specimen is provided with flange；The flange is connected by bolt with the base；Institute It is fixture to state loading end fixing device, including for connect the composite sleeve test specimen and actuator can pretension embrace Hoop；The actuator applies thrust to its cantilever end；The strain gauge is symmetrically axially separately positioned on the composite sleeve Surveyed on the outside of the flange in the bottom of test specimen and in the flange in the bottom；The strain gauge is axially disposed within the composite sleeve test specimen Top, close to the outside of the top flange, the composite sleeve test piece lower part, close to the outside of the flange in the bottom and On the outside of the middle part of the composite sleeve test specimen.
- 8. a kind of scaling method of transformer station's composite sleeve antidetonation ultimate bearing force parameter as claimed in claim 7, its It is characterised by：During the Quintic system beam test, its cantilever is further applied load by the actuator, by displacement control Loading capacity processed, the rate of application of the load is 5mm/min, by unidirectionally loading or back and forth loading, until the test specimen occurs Destroy, and its depression of bearing force is 80% of maximum load capacity when not destroying when the test specimen destroys；It is described past when carrying out When being added with load, each rank displacement increment is 10mm；Judge as follows in the Quintic system beam test, the composite sleeve test specimen limit of bearing capacity：Take The loading end movement d- loading force F curves that the Quintic system beam test obtains, it is described loading end movement d- loading force F curves by Linear rise section, plasticity ascent stage and descending branch composition, line taking segment endpoint is limit of bearing capacity point, remembers loading position now Move as dy, loading force Fy；And ultimate bearing force value Mst of the composite bushing in Quintic system beam test is obtained, pass through following formula It is determined that：Mst=Fy*hWherein, h is distance of the loading end to flange in the bottom.
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| CN111122312B (en) * | 2018-10-30 | 2023-12-12 | 中国电力科学研究有限公司 | Measuring device for ultimate bearing capacity of lightning arrester hardware fitting |
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