CN107101881B - The impact experiment apparatus and its experimental method of a kind of brace pre axial force, moment of flexure - Google Patents
The impact experiment apparatus and its experimental method of a kind of brace pre axial force, moment of flexure Download PDFInfo
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- CN107101881B CN107101881B CN201710480859.0A CN201710480859A CN107101881B CN 107101881 B CN107101881 B CN 107101881B CN 201710480859 A CN201710480859 A CN 201710480859A CN 107101881 B CN107101881 B CN 107101881B
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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
- G01M7/08—Shock-testing
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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
- G01N3/02—Details
- G01N3/04—Chucks
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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
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
- G01N3/307—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight generated by a compressed or tensile-stressed spring; generated by pneumatic or hydraulic means
Abstract
The invention discloses a kind of brace pre axial forces for cooperating impact experiment, the test piece fixing device and its experimental method of moment of flexure, it includes rigid base, sliding end load application component, fixing end load application component, pendulum, test specimen, data collection system and terminal totally 7 part that it, which fixes device, its key technology point is, the toothed track compression specimens of eccentricity can be adjusted flexibly through the load pressure head insertion of pneumatic device driving, realize a variety of initial axle powers and moment of flexure load cases combination；When impact experiment, instantaneous impact leads to test specimen lateral deformation and causes axial shrinkage, the elongation of pneumatic device piston, and the axle power and moment of flexure for being continuously applied diminuendo are until component failure, the practical Evolution of internal force during accurate simulation structural collapse；At the same time, data collection system records load, change in displacement and test specimen configuration evolution process in real time, provides data support to assess the collapse resistant capacity of test specimen and establishing accurate mechanics analysis model.Overall structure of the present invention is simple, compact, and experimental implementation is simple.
Description
Technical field
The invention belongs to a kind of experiment with test specimen fix with pre-load means and its experimental method, be specially related to one kind and match
Close the brace pre axial force of impact experiment, the test piece fixing device and its experimental method of moment of flexure.
Background technique
With social progress and increasingly serious anti-probably situation, safety of the people for large public building and safeguard structure
Design has requirements at the higher level.Since eighties of last century, scholars strengthen mechanical analysis of the structural elements under shock loading
And experimental study, the great development of material and energy absorbing device has been pushed, automobile, space flight and war industry are widely used in
Equal fields.Main load-bearing and anti-side component of the pillar as building structure, the failure caused in the case where impacting class intense dynamic load
It will lead to large-scale personnel and property loss, carry out experimental study for it and be paid more and more attention.However, answering in view of problem
Polygamy, traditional experimental method are only applicable to simply load and boundary condition, such as only consider clamped or simple boundary, or only examine
Consider influence of the initial axle power to structural response, and ignores axle power in the diminuendo effect of overall deformation process and have to structural response
The Moment of tremendous influence.Therefore, accurate structural safety evaluatio and the perfect of design theory need one kind that can examine simultaneously
Consider the experimental provision of gradual change axle power and moment of flexure, and carries out experimental study as relying on.
Summary of the invention
In view of the above-mentioned problems, that one of the objects of the present invention is to provide a kind of structures is simple, compact and easily operated pre-
Add the test piece fixing device of axle power and moment of flexure, the present apparatus can not only provide a variety of internal force combining forms and complete the pre- of different operating conditions
Impact after load and test specimen load, also can accurately measure and records the diminuendo that test specimen during impact experiment is born in real time
Axle power and moment of flexure.
The invention discloses a kind of brace pre axial forces for cooperating impact experiment, the test piece fixing device of moment of flexure.The device includes
Rigid base, sliding end load apply component, fixing end load applies component, pendulum, test specimen, data collection system and computer
Terminal.
The rigid base includes sliding end rigid base and fixing end rigid base, by earth anchorage in rigid bottom
The designated position of plate.
The data collection system includes pressure sensor, displacement sensor, dynamic collecting instrument, contactless strain displacement
Measuring instrument and terminal.The pressure sensor and displacement sensor are connected by data line with dynamic collecting instrument；
The dynamic collecting instrument and contactless strain displacement measuring instrument pass through data line and the terminal communication connection.
It includes sliding axle force applying assembly, sliding moment of flexure application component, gas pressurized that the sliding end load, which applies component,
System and pneumatic charging assembly.The pneumatically loading component is fixed on sliding end rigid base upper end by high-strength bolt.
The positive front end of pneumatically loading component sequentially fixes the sliding axle force applying assembly by high-strength bolt and sliding moment of flexure applies
Component.The rotary clamp that the sliding moment of flexure applies component clamps test specimen one end, prevents from extracting.
The sliding axle power charging assembly further comprises slide cartridge, partition, pressure sensor and protective cover.The slide cartridge can
Guarantee that the direction of motion of knife-edge load pressure head remains unchanged, and then guarantees that applied axle power direction is constant.
It further comprises arc track, knife-edge load pressure head, rotary clamp, tooth form cunning that the sliding moment of flexure, which applies component,
Road.The knife-edge head of the knife-edge load pressure head is caught in the serrate slot of the tooth form slideway, and the knife-edge head of knife-edge load pressure head
Thickness is less than the opening width of serrate slot, its purpose is that tooth form slideway is in loading procedure with knife-edge load pressure head knife-edge in serrate slot
Overhead is fulcrum rotation.
The pneumatically loading component further comprises backing plate, cylinder, holding clamp.The backing plate and sliding end rigid base
Connection, the cylinder are fixed on the backing plate by holding clamp.The end of the cylinder piston rod by the partition and
Pressure sensor connection.Cylinder in the pneumatically loading component can work independently in the case where not assembling moment of flexure and applying component, real
Experimental study of the existing test specimen under the load of simple axle power.
The gas pressurized system is connected by high-pressure air pipe with the cylinder.It is connected with check-valves on the conduit, is used for
Control the connection and blocking of cylinder and gas pressurizing system.The gas pressurized system can set the target pressurising water to cylinder
Flat, gas pressurized system is automatically stopped pressurising and inner pressure of air cylinder value is maintained to keep not when inner pressure of air cylinder reaches target pressure value
Become.
The fixing end load applies component and is fixed on the fixing end rigid base, including arc track, knife-edge add
Carry pressure head, rotary clamp, tooth form slideway and adjustable fixed plate.The rotary clamp clamps the test specimen other end, blade type load pressure
Fixing end rigid base is fixed on by the adjustable fixed plate in the end of head.
When applying axle power and moment of flexure, according to the axle power of required application and moment of flexure by gas pressurized default to cylinder
Target pressurising it is horizontal, air pressurizing system is automatically stopped pressurising and maintains in cylinder when inner pressure of air cylinder reaches target pressure value
Pressure value remains unchanged, and closes check-valves.During pressurising, piston rod in cylinder with the raising of air pressure in cylinder and to
Outer stretching, and driving pressure sensor, sliding moment of flexure apply the knife-edge load pressure head and tooth form slideway forward slip of component, tooth form
Slideway is rotated as fulcrum using knife-edge load pressure head knife-edge overhead in serrate slot and makes test specimen at one end by axial compressive force
With the effect of moment of flexure, while fixing end load applies component to provide corresponding reaction force (packet to test specimen in the test specimen other end
Include axial compressive force and moment of flexure), test specimen occurs bending and deformation, and is realized with this to test specimen brace pre axial force and moment of flexure.
The moment of flexure applies the level and knife-edge load pressure head insertion tooth form that Axial-output pressure can be adjusted flexibly in component
The eccentricity of track different location realizes a variety of initial axle powers and moment of flexure load cases combination.
During to cylinder pressurising, dynamic collecting instrument passes through pressure sensor respectively and displacement sensor is surveyed in real time
Amount, record cylinder piston rod are to the pressure of pressure sensor (that is, test specimen two ends portion be subject to axial compressive force value) and test specimen two ends
Portion's axial displacement and real-time display are in terminal.
Amount of deflection and real-time display in the middle part of the contactless strain displacement measuring instrument real-time measurement, record test specimen is in calculating
Machine terminal.
The cylinder piston rod of the pneumatically loading component can be followed because initial loading and percussion generate axial deformation
Test specimen sliding, and cause axial compressive force and moment of flexure to reduce because the inner pressure of air cylinder becomes smaller, so that real simulation Practical Project falls
Axle power, the diminuendo effect of moment of flexure during collapsing.
The second purpose of the invention is to provide brace pre axial force, the test specimen of moment of flexure of a kind of above-mentioned cooperation impact experiment are solid
The experimental method for determining device has the characteristics that easy to operate, more components are easily replaced.
The experimental method of the test piece fixing device of the above-mentioned brace pre axial force for cooperating impact experiment, moment of flexure, which is characterized in that
The following steps are included:
The first step adjusts the position that sliding end load applies component and fixing end load applies component according to piece lengths,
Test specimen two ends are individually fixed on the fixture of both ends charging assembly；
Second step adjusts both ends load and applies position of the knife-edge load pressure head of component on tooth form slideway；
Third step opens dynamic collecting instrument, pressure sensor, displacement meter and terminal, terminal and starts reality
Shi Jilu simultaneously shows test piece end pressure and end axial displacement；Check-valves is opened, according to axle power and moment of flexure needed for testing
The horizontal simultaneously starting device of target pressurising for setting gas pressurized system starts pressurising, gas when pressure reaches target, pressure in cylinder
Pressurizing system is automatically stopped pressurising and inner pressure of air cylinder value is maintained to remain unchanged, and closes check-valves, and pressurising terminates, i.e. completion test specimen
Preloading；
4th step, opens contactless strain displacement measuring instrument and terminal, and terminal starts to record in real time
And show amount of deflection in the middle part of test specimen, pendulum is adjusted to object height, discharges pendulum, pendulum completes the impact to test specimen, while data
Amount of deflection in the middle part of external pressure suffered by test specimen in entire impact process, axial displacement and test specimen is recorded in real time, is shown by acquisition system
The axle power of test specimen axis direction any position and end moment of flexure are synchronized into reality in terminal, and according to axle power and bemding moment formula
When be shown in terminal；
5th step prints out test data, pass hull closure, the test specimen after disassembly impact.
In conclusion the present invention compared with existing experimental rig, have it is following the utility model has the advantages that
1, fixing device for experiment of the invention, can be horizontal by adjusting the pressurising of pneumatic device, realizes not coaxial force water
Flat application；
2, fixing device for experiment of the invention, can by adjusting arc track orientation and load pressure head in tooth form rail
Realize a variety of axle powers, moment of flexure composite condition in the position in road；
3, fixing device for experiment of the invention can be continuously applied the axis of amplitude diminuendo after test specimen bears transient state lateral impact
Power and moment of flexure meet the actual conditions of engineering collapsing procedure.
Detailed description of the invention
Fig. 1 is overall structure diagram when apparatus of the present invention apply axle power and moment of flexure；
Fig. 2 is decomposition texture schematic diagram when apparatus of the present invention apply axle power and moment of flexure；
Fig. 3 is force diagram of the test specimen of apparatus of the present invention under 4 kinds of different conditions；
Fig. 4 is bending moment diagram of the test specimen of apparatus of the present invention under 4 kinds of different conditions.
Description of symbols:
1, earth anchor；2, sliding end rigid base；3, fixing end rigid base；4, pneumatically loading component (4a, backing plate；4b, consolidate
Determine fixture；4c, cylinder)；5, sliding axle force applying assembly (5a, slide cartridge；5b, partition；5c, pressure sensor；5d, protective cover)；
6, sliding moment of flexure applies component (6a, arc track；6b, knife-edge load pressure head；6c, rotary clamp；6d, tooth form slideway)；7, solid
Fixed-end moment applies component, and (7a, knife-edge load pressure head；7b, adjustable fixed plate)；8, check-valves；9, displacement sensor；10, it moves
State Acquisition Instrument；11, terminal；12, gas pressurized system；13, test specimen；14, contactless strain displacement measuring instrument；15,
Pendulum；16-18, high-strength bolt.
Specific embodiment
To make technological means of the invention it can be readily appreciated that the specific implementation process of the invention below in conjunction with Detailed description of the invention.?
In following explanation, it is not exhaustive of well known structure and function.
As shown in Figures 1 and 2, the present invention is the test piece fixing device of a kind of brace pre axial force of cooperation impact experiment, moment of flexure,
The device includes rigid base, sliding end load applies component, fixing end load applies component, pendulum, test specimen, data acquisition system
System and terminal.
The rigid base includes sliding end rigid base 2 and fixing end rigid base 3, is fixed on just by earth anchor 1
The designated position of property bottom plate.
The data collection system includes pressure sensor 5c, displacement sensor 9, dynamic collecting instrument 10, contactless answers
Variable displacement measuring instrument 14 and terminal 11.The pressure sensor 5c and displacement sensor 9 by data line and move
The connection of state Acquisition Instrument；The dynamic collecting instrument and contactless strain displacement measuring instrument pass through data line and the computer
Terminal called connection.
The sliding end load application component includes sliding axle force applying assembly 5, sliding moment of flexure applies component 6, gas fills
Pressure system 12 and pneumatic charging assembly 4.The pneumatically loading component is fixed on the sliding end rigid base 2 by high-strength bolt
Upper end.The sliding axle force applying assembly and sliding moment of flexure are sequentially fixed by high-strength bolt in the positive front end of pneumatically loading component
Apply component.The rotary clamp 6c that the sliding moment of flexure applies component clamps 13 one end of test specimen, prevents from extracting.
The sliding axle power charging assembly 5 further comprises slide cartridge 5a, partition 5b, pressure sensor 5c and protective cover 5d.
The slide cartridge can guarantee that the direction of motion of knife-edge load pressure head 6b remains unchanged, and then guarantee that applied axle power direction is constant.
The sliding moment of flexure apply component 6 further comprise arc track 6a, knife-edge load pressure head 6b, rotary clamp 6c,
Tooth form slideway 6d.The knife-edge head of the knife-edge load pressure head is caught in the serrate slot of the tooth form slideway, and knife-edge loads pressure head
Knife-edge head thickness be less than serrate slot opening width, its purpose is that tooth form slideway is loaded in loading procedure with knife-edge in serrate slot
Pressure head knife-edge overhead is fulcrum rotation.
The pneumatically loading component 4 further comprises backing plate 4a, holding clamp 4b and cylinder 4c.The backing plate and sliding end
Rigid base connection, the cylinder are fixed on the backing plate by holding clamp.The end of the cylinder piston rod passes through institute
Partition is stated to connect with pressure sensor.
The gas pressurized system is connected by high-pressure air pipe with the cylinder 4c.It is connected with check-valves 8 on the conduit, uses
In the connection and blocking of control cylinder and gas pressurizing system.The gas pressurized system can set the target pressurising water to cylinder
Flat, air pressurizing system is automatically stopped pressurising and inner pressure of air cylinder value is maintained to keep not when inner pressure of air cylinder reaches target pressure value
Become.
The fixing end load applies component 7 and is fixed on the fixing end rigid base 3, including arc track 6a, knife
Shape loads pressure head 6b, rotary clamp 6c, tooth form slideway 6d and adjustable fixed plate 7b.It is another that the rotary clamp clamps test specimen
Fixing end rigid base is fixed on by the adjustable fixed plate in the end at end, blade type load pressure head.
When applying axle power and moment of flexure, set by air pressurizing system to cylinder according to the axle power of required application and moment of flexure
Target pressurising it is horizontal, air pressurizing system is automatically stopped pressurising and maintains in cylinder when inner pressure of air cylinder reaches target pressure value
Pressure remains unchanged, and closes check-valves.During pressurising, the piston rod in cylinder is outside with the raising of air pressure in cylinder
It stretches out, and driving pressure sensor, sliding moment of flexure apply the knife-edge load pressure head of component and tooth form slideway forward slip, tooth form are slided
Road using in serrate slot knife-edge load pressure head knife-edge overhead rotate as fulcrum and make test specimen at one end by axial compressive force with
The effect of moment of flexure, at the same fixing end load apply component can the test specimen other end to test specimen provide corresponding reaction force (including
Axial compressive force and moment of flexure), test specimen occurs bending and deformation, and is realized with this to test specimen brace pre axial force and moment of flexure.
The moment of flexure applies the level and knife-edge load pressure head insertion tooth form that Axial-output pressure can be adjusted flexibly in component
The eccentricity of track different location realizes a variety of initial axle powers and moment of flexure load cases combination.
During to cylinder pressurising, dynamic collecting instrument passes through pressure sensor and displacement meter real-time measurement, note respectively
Record cylinder piston rod is to the pressure of pressure sensor (namely test specimen two ends portion be subject to axial compressive force value) and test specimen two ends portion axis
To displacement and real-time display is in terminal.
Amount of deflection and real-time display in the middle part of the contactless strain displacement measuring instrument real-time measurement, record test specimen is in calculating
Machine terminal.
Cooperate the experimental method of the brace pre axial force of impact experiment, the test piece fixing device of moment of flexure, comprising the following steps:
The first step adjusts the position that sliding end load applies component and fixing end load applies component according to piece lengths,
Test specimen two ends are individually fixed on the fixture of both ends charging assembly；
Second step adjusts both ends load and applies position of the knife-edge load pressure head of component on tooth form slideway；
Third step is opened dynamic collecting instrument, pressure sensor, displacement sensor and terminal, terminal and is opened
Begin to record and show in real time test piece end pressure and end axial displacement；Open check-valves, according to test needed for axle power and
The target pressurising of moment of flexure setting gas pressurized system is horizontal and starting device starts pressurising, when pressure reaches target, pressure in cylinder
Air pressurizing system is automatically stopped pressurising and inner pressure of air cylinder value is maintained to remain unchanged, and closes check-valves, and pressurising terminates, that is, completes
The preloading of test specimen；
4th step, opens contactless strain displacement measuring instrument and terminal, and terminal starts to record in real time
And show amount of deflection in the middle part of test specimen.Pendulum is adjusted to object height, discharges pendulum, pendulum completes the impact to test specimen, while data
Acquisition system records amount of deflection variation in the middle part of external pressure suffered by test specimen in entire impact process, axial displacement and test specimen in real time
And it is shown in terminal, and according to axle power and bemding moment formula (1) by the axle power and moment of flexure of test specimen axis direction any position
It synchronizes and saves in real time and be shown in terminal；
(1)
Symbolic interpretation in formula:
: the axle power measured by the load transducer and data collection system；
: test specimen upper and lower end axle power as caused by xial feed；
: test specimen upper and lower end corresponds to eccentricity；
: test specimen upper and lower end moment of flexure as caused by xial feed；
5th step prints out test data, pass hull closure, the test specimen after disassembly impact.
The foregoing is merely within the spirit and principle of invention, any modification, equivalent substitution, improvement and etc. done should all
It is included within protection scope of the present invention.
In addition to the technical characteristic described in the specification, remaining technical characteristic is technology known to those skilled in the art, in order to prominent
Innovative characteristics of the invention out, details are not described herein for above-mentioned technical characteristic.
Claims (4)
1. the test piece fixing device of a kind of brace pre axial force for cooperating impact experiment, moment of flexure, which includes: rigid base, sliding
End load applies component, fixing end load applies component, pendulum, test specimen, data collection system and terminal, feature and exists
In the rigid base includes sliding end rigid base and fixing end rigid base, and the sliding end load applies component connection
In the sliding end rigid base, it includes sliding axle force applying assembly, sliding moment of flexure application that the sliding end load, which applies component,
Institute is sequentially fixed by high-strength bolt in component, gas pressurized system and pneumatic charging assembly, the positive front end of pneumatically loading component
It states sliding axle force applying assembly and sliding moment of flexure applies component, it is rigid that the fixing end load application component is fixed on the fixing end
On property pedestal；
The sliding axle power charging assembly further comprises slide cartridge, partition, pressure sensor and protective cover；
It further comprises arc track, knife-edge load pressure head, rotary clamp, tooth form slideway that the sliding moment of flexure, which applies component, is turned
The knife-edge head of knife-edge load pressure head described in dynamic clamp test specimen one end is embedded in the serrate slot of the tooth form slideway, and knife-edge adds
The knife-edge head thickness for carrying pressure head is less than the opening width of serrate slot, and tooth form slideway is in loading procedure with knife-edge load pressure in serrate slot
Head knife-edge overhead is fulcrum rotation；
The pneumatically loading component further comprises backing plate, cylinder, holding clamp, and the backing plate and sliding end rigid base connect
It connects, the cylinder is fixed on the backing plate by holding clamp, and the end of the cylinder piston rod passes through the partition and pressure
Force snesor connects, and the cylinder in the pneumatically loading component can work independently in the case where not assembling moment of flexure and applying component, realizes
Experimental study of the test specimen under the load of simple axle power；
The fixing end load applies component and includes arc track, knife-edge load pressure head, rotary clamp, tooth form slideway and be adjusted
Fixed plate, the rotary clamp clamp the test specimen other end, and the end of knife-edge load pressure head is fixed by the adjustable fixed plate
In fixing end rigid base.
2. the test piece fixing device of a kind of brace pre axial force for cooperating impact experiment according to claim 1, moment of flexure, feature
It is, the gas pressurized system is connected by high-pressure air pipe with the cylinder, is connected on the high-pressure air pipe for controlling gas
The check-valves of cylinder and gas pressurizing system connection and blocking, the gas pressurized system can set the target pressurising water to cylinder
Flat, gas pressurized system is automatically stopped pressurising and inner pressure of air cylinder value is maintained to keep not when inner pressure of air cylinder reaches target pressure value
Become.
3. the test piece fixing device of a kind of brace pre axial force for cooperating impact experiment according to claim 1, moment of flexure, feature
It is, the data collection system includes pressure sensor, displacement sensor, dynamic collecting instrument, the survey of contactless strain displacement
Instrument and terminal are measured, the pressure sensor and displacement sensor are connected by data line with dynamic collecting instrument, institute
It states dynamic collecting instrument and contactless strain displacement measuring instrument and passes through data line and the terminal communication connection, number
Amount of deflection variation in the middle part of external pressure suffered by test specimen in entire impact process, axial displacement and test specimen is remembered in real time according to acquisition system
It records, be shown in terminal, and according to axle power and calculation of Bending Moment formula by test piece end axle power as caused by axis pressure and curved
Square, which synchronizes, to be saved in real time and is shown in terminal.
4. the test piece fixing device of a kind of brace pre axial force for cooperating impact experiment according to claim 1, moment of flexure, feature
It is, the moment of flexure applies the level and knife-edge load pressure head insertion toothed track that Axial-output pressure can be adjusted flexibly in component
The eccentricity of different location realizes a variety of initial axle powers and moment of flexure load cases combination.
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| CN201710480859.0A CN107101881B (en) | 2017-06-22 | 2017-06-22 | The impact experiment apparatus and its experimental method of a kind of brace pre axial force, moment of flexure |
| CN201910897209.5A CN110618044B (en) | 2017-06-22 | 2017-06-22 | Impact experiment method for pre-adding axial force and bending moment |
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| CN109030203A (en) * | 2018-06-27 | 2018-12-18 | 大连理工大学 | Flexible fabric yarn extracts experimental provision and its working method |
| CN109187236A (en) * | 2018-07-27 | 2019-01-11 | 南京航空航天大学 | It is a kind of to apply the high speed impact experimental rig preloaded and method |
| CN109540448B (en) * | 2018-11-30 | 2021-01-19 | 安徽威成精密铸造有限公司 | Filter quality detection knocking test device |
| CN112945738B (en) * | 2021-01-29 | 2022-08-09 | 中国原子能科学研究院 | Mechanical test device |
| CN114527015B (en) * | 2022-02-14 | 2023-11-10 | 哈尔滨工业大学 | Pure torsion creep test device suitable for multiple-size combined components and test method thereof |
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| CN201285362Y (en) * | 2008-10-22 | 2009-08-05 | 宝山钢铁股份有限公司 | Bending fatigue experiment apparatus for band steel weld seam |
| CN202916152U (en) * | 2012-10-23 | 2013-05-01 | 中国石油天然气集团公司 | Single-bend pressure test device |
| CN203621328U (en) * | 2013-12-03 | 2014-06-04 | 国家电网公司 | Portable grounded round steel bending machine |
| CN203908883U (en) * | 2014-04-25 | 2014-10-29 | 西安三维应力工程技术有限公司 | Bending fatigue test device for oil casing under combined load |
| CN104075943A (en) * | 2014-06-30 | 2014-10-01 | 天地科技股份有限公司 | Test bed for testing integrated mechanical properties of anchor rod and test method |
| CN105823398A (en) * | 2016-05-10 | 2016-08-03 | 大连理工大学 | Novel device and method for testing minimum bend radius of ocean engineering flexibility pipeline and cable |
| CN106124319A (en) * | 2016-08-08 | 2016-11-16 | 中国电力科学研究院 | Moment of flexure active control experiment system and method |
| CN106644349A (en) * | 2017-03-07 | 2017-05-10 | 山东科技大学 | Multifunctional impact experiment platform and method capable of continuously applying axial force |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107101881A (en) | 2017-08-29 |
| CN110618044B (en) | 2021-11-09 |
| CN110618044A (en) | 2019-12-27 |
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