CN107101881A - A kind of brace pre axial force, the impact experiment apparatus of moment of flexure and its experimental method - Google Patents
A kind of brace pre axial force, the impact experiment apparatus of moment of flexure and its experimental method Download PDFInfo
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- CN107101881A CN107101881A CN201710480859.0A CN201710480859A CN107101881A CN 107101881 A CN107101881 A CN 107101881A CN 201710480859 A CN201710480859 A CN 201710480859A CN 107101881 A CN107101881 A CN 107101881A
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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
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Abstract
The invention discloses a kind of brace pre axial force, the test piece fixing device of moment of flexure and its experimental method of cooperation impact experiment, its fixing device includes rigid base, sliding end load and applies component, fixing end load application component, pendulum, test specimen, data collecting system and terminal totally 7 part, its key technology point is, the toothed track compression specimens of eccentric throw can be adjusted flexibly in the loading pressure head insertion driven through pneumatic means, realize a variety of initial axle powers and moment of flexure load cases combination；During impact experiment, instantaneous impact causes test specimen lateral deformation and triggers axial shrinkage, the elongation of pneumatic means piston, is continuously applied the axle power and moment of flexure of diminuendo until component failure, the actual Evolution of internal force during accurate simulation structural collapse；At the same time, data collecting system records load, change in displacement and test specimen configuration evolution process in real time, and data support is provided to assess the collapse resistant capacity of test specimen and setting up 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 fixed with test specimen with pre-load means and its experimental method, be specially related to one kind and match somebody with somebody
Close brace pre axial force, the test piece fixing device of moment of flexure and its experimental method of impact experiment.
Background technology
With social progress and increasingly serious anti-probably situation, safety of the people for large public building and safeguard structure
It has been designed with 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 promoted, automobile, space flight and war industry is widely used in
Deng field.Main load-bearing and anti-side component of the pillar as building structure, the failure triggered under impact class INTENSE DYNAMIC LOADING
Large-scale personnel and property loss will be caused, carry out experimental study for it and be increasingly subject to pay attention to.However, in view of problem is answered
Polygamy, traditional experimental method is only applicable to simple loading and boundary condition, such as only considers clamped or simple boundary, or only examine
Consider influence of the initial axle power to structural response, and ignore axle power in the diminuendo effect of overall deformation process and have to structural response
The Moment of tremendous influence.Therefore, perfect needs one kind of accurate structural safety evaluatio and design theory can be examined simultaneously
Consider the experimental provision of gradual change axle power and moment of flexure, and carry out experimental study as relying on.
The content of the invention
In view of the above-mentioned problems, an object of the present invention is to provide a kind of simple in construction, compact and easily operated pre-
Plus 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 modes
Impact after loading and test specimen loading, also can accurately measure and the diminuendo born of test specimen during record impact experiment in real time
Axle power and moment of flexure.
The invention discloses it is a kind of coordinate impact experiment brace pre axial force, moment of flexure test piece fixing device.The device includes
Rigid base, sliding end load apply component, fixing end load and apply component, pendulum, test specimen, data collecting system and computer
Terminal.
The rigid base includes sliding end rigid base and fixing end rigid base, by earth anchorage in rigid bottom
The specified location of plate.
The data collecting system includes pressure sensor, displacement transducer, dynamic collecting instrument, contactless strain displacement
Measuring instrument and terminal.The pressure sensor and displacement transducer are connected by data line and dynamic collecting instrument；
The dynamic collecting instrument and contactless strain displacement measuring instrument are connected by data line and terminal communication.
The sliding end load, which applies component, to be included sliding axle force applying assembly, slides moment of flexure application component, gas pressurized
System and pneumatic charging assembly.The pneumatically loading component is fixed on the sliding end rigid base upper end by high-strength bolt.
The positive front end of pneumatically loading component, which is sequentially fixed the sliding axle force applying assembly by high-strength bolt and slides moment of flexure, to be applied
Component.It is described to slide rotary clamp clamping test specimen one end that moment of flexure applies component, prevent from extracting.
The slip axle power charging assembly further comprises slide cartridge, dividing plate, pressure sensor and protective cover.The slide cartridge can
Ensure that the direction of motion of knife-edge loading pressure head keeps constant, and then ensure that to apply axle power direction constant.
The slip moment of flexure applies component and further comprises that arc track, knife-edge loading pressure head, rotary clamp, tooth form are slided
Road.The knife-edge head of the knife-edge loading pressure head is caught in the serrate slot of the tooth form slideway, and knife-edge loads the knife-edge head of pressure head
Thickness is less than the A/F of serrate slot, and its purpose loads pressure head knife-edge for tooth form slideway in loading procedure with knife-edge in serrate slot
Overhead is fulcrum.
The pneumatically loading component further comprises backing plate, cylinder, holding clamp.Backing plate and the sliding end rigid base
Connection, the cylinder is fixed on the backing plate by holding clamp.The end of the cylinder piston rod by the dividing plate and
Pressure sensor is connected.Cylinder in the pneumatically loading component works independently under can applying component not assembling moment of flexure, real
Experimental study of the existing test specimen under the loading of simple axle power.
The gas pressurized system is connected by high-pressure air pipe and the cylinder.Check-valves is connected with 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 maintains inner pressure of air cylinder value 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 loading pressure
Fixing end rigid base is fixed in the end of head by the adjustable fixed plate.
When applying axle power and moment of flexure, according to the axle power and moment of flexure of required application by gas pressurized default to cylinder
Target pressurising level, air pressurizing system is automatically stopped pressurising and maintained in cylinder when inner pressure of air cylinder reaches target pressure value
Pressure value keeps constant, closes check-valves.During pressurising, piston rod in cylinder with the rise of air pressure in cylinder to
Overhang, and driving pressure sensor, the knife-edge loading pressure head and tooth form slideway forward slip that slide moment of flexure application component, tooth form
Slideway knife-edge loading pressure head knife-edge overhead using in serrate slot rotates as fulcrum and makes test specimen at one end by axial compressive force
With the effect of moment of flexure, it can give test specimen offer corresponding reaction force in the test specimen other end while fixing end load applies component（Bag
Include axial compressive force and moment of flexure）, test specimen occured bending and deformation, realized with this to test specimen brace pre axial force and moment of flexure.
The moment of flexure, which applies component, can be adjusted flexibly the level and knife-edge loading pressure head insertion tooth form of Axial-output pressure
The eccentric throw of track diverse location, realizes a variety of initial axle powers and moment of flexure load cases combination.
During to cylinder pressurising, dynamic collecting instrument is surveyed in real time by pressure sensor and displacement transducer respectively
The pressure of amount, record cylinder piston rod to pressure sensor（That is, the axial compressive force value that test specimen two ends portion is subject to）And test specimen two ends
Portion's axial displacement is simultaneously shown in terminal in real time.
The contactless strain displacement measuring instrument measures, records the amount of deflection in the middle part of test specimen and is shown in calculating in real time in real time
Machine terminal.
The cylinder piston rod of the pneumatically loading component can be followed because original upload and percussion produce axial deformation
Test specimen slides, and causes axial compressive force and moment of flexure to reduce because the inner pressure of air cylinder diminishes, so that truly simulation Practical Project falls
Axle power, the diminuendo effect of moment of flexure during collapsing.
The second object of the present invention is to provide a kind of above-mentioned brace pre axial force of cooperation impact experiment, the test specimen of moment of flexure and consolidated
Determine the experimental method of device, it has the features such as easy to operate, many components are easily replaced.
The brace pre axial force of above-mentioned cooperation impact experiment, the experimental method of the test piece fixing device of moment of flexure, it is characterised in that
Comprise the following steps：
The first step, adjusts the position that sliding end load applies component and fixing end load application component according to piece lengths, will try
Part two ends are individually fixed on the fixture of two ends charging assembly；
Second step, regulation two ends load applies position of the knife-edge loading pressure head of component on tooth form slideway；
3rd step, opens dynamic collecting instrument, pressure sensor, displacement meter and terminal, and terminal starts real-time note
Record and show test piece end pressure and end axial displacement；Check-valves is opened, axle power and moment of flexure setting according to needed for experiment
The target pressurising level and starting device of gas pressurized system start gas pressurized when pressure reaches target, pressure in pressurising, cylinder
System is automatically stopped pressurising and maintains inner pressure of air cylinder value to keep constant, closes check-valves, pressurising terminates, that is, completes the pre- of test specimen
Loading；
4th step, opens contactless strain displacement measuring instrument and terminal, and terminal starts to record and show in real time
Show amount of deflection in the middle part of test specimen, regulation pendulum to object height discharges pendulum, pendulum completes the impact to test specimen, while data acquisition
External pressure, axial displacement and test specimen middle part amount of deflection suffered by test specimen in whole impact process are recorded, are shown in meter by system in real time
Calculation machine terminal, and it is according to axle power and bemding moment formula that the axle power of test specimen axis direction optional position and end moment of flexure is synchronous aobvious in real time
It is shown in terminal；
5th step, prints out test data, pass hull closure, the test specimen after dismounting impact.
In summary, it is of the invention compared with existing experimental rig, there is following beneficial effect：
1st, fixing device for experiment of the invention, can realize not coaxial force level by adjusting the pressurising level of pneumatic means
Apply；
2nd, fixing device for experiment of the invention, can be by adjusting the orientation and loading pressure head of arc track in toothed track
Realize a variety of axle powers, moment of flexure composite condition in position；
3rd, fixing device for experiment of the invention, can be continuously applied after test specimen bears transient state lateral impact amplitude diminuendo axle power and
Moment of flexure, meets the actual conditions of engineering collapsing procedure.
Brief description of the drawings
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 reference numerals：
1st, earth anchor；2nd, sliding end rigid base；3rd, fixing end rigid base；4th, pneumatically loading component（4a, backing plate；4b, fixing card
Tool；4c, cylinder）；5th, sliding axle force applying assembly（5a, slide cartridge；5b, dividing plate；5c, pressure sensor；5d, protective cover）；6th, it is sliding
Dynamical bending moment applies component（6a, arc track；6b, knife-edge loading pressure head；6c, rotary clamp；6d, tooth form slideway）；7th, fixing end
Moment of flexure applies component（7a, knife-edge loading pressure head；7b, adjustable fixed plate）；8th, check-valves；9th, displacement transducer；10th, dynamic is adopted
Collect instrument；11st, terminal；12nd, gas pressurized system；13rd, test specimen；14th, contactless strain displacement measuring instrument；15th, pendulum；
16-18, high-strength bolt.
Embodiment
To make the technological means of the present invention it can be readily appreciated that below in conjunction with the specific implementation process of the brief description of the drawings present invention.
In following explanation, known 26S Proteasome Structure and Function is not exhaustive of.
As shown in Figures 1 and 2, the present invention is a kind of brace pre axial force, test piece fixing device of moment of flexure of cooperation impact experiment,
The device includes rigid base, sliding end load and applies component, fixing end load application 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 specified location of property bottom plate.
The data collecting system include pressure sensor 5c, displacement transducer 9, dynamic collecting instrument 10, it is contactless should
Variable displacement measuring instrument 14 and terminal 11.The pressure sensor 5c and displacement transducer 9 are by data line and move
State Acquisition Instrument is connected；The dynamic collecting instrument and contactless strain displacement measuring instrument pass through data line and the computer
Terminal called is connected.
The sliding end load applies component and filled including sliding axle force applying assembly 5, slip moment of flexure application component 6, gas
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 positive front end of pneumatically loading component is sequentially fixed the sliding axle force applying assembly by high-strength bolt and slides moment of flexure
Apply component.It is described to slide rotary clamp 6c clamping test specimens 13 one end that moment of flexure applies component, prevent from extracting.
The slip axle power charging assembly 5 further comprises slide cartridge 5a, dividing plate 5b, pressure sensor 5c and protective cover 5d.
The slide cartridge can ensure that the knife-edge loading pressure head 6b direction of motion keeps constant, and then ensure to apply axle power direction constant.
The slip moment of flexure apply component 6 further comprise arc track 6a, knife-edge loading pressure head 6b, rotary clamp 6c,
Tooth form slideway 6d.The knife-edge head of the knife-edge loading pressure head is caught in the serrate slot of the tooth form slideway, and knife-edge loading pressure head
Knife-edge head thickness be less than serrate slot A/F, its purpose be loading procedure in tooth form slideway loaded with knife-edge in serrate slot
Pressure head knife-edge overhead is fulcrum.
The pneumatically loading component 4 further comprises backing plate 4a, holding clamp 4b and cylinder 4c.The backing plate and sliding end
Rigid base is connected, and the cylinder is fixed on the backing plate by holding clamp.The end of the cylinder piston rod passes through institute
State dividing plate and pressure sensor connection.
The gas pressurized system passes through high-pressure air pipe and the cylinder 4c connections.Check-valves 8 is connected with the conduit, is used
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 maintains inner pressure of air cylinder value 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 loading 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 in end, the end of blade type loading pressure head by the adjustable fixed plate.
When applying axle power and moment of flexure, set according to the axle power and moment of flexure of required application by air pressurizing system to cylinder
Target pressurising level, air pressurizing system is automatically stopped pressurising and maintained in cylinder when inner pressure of air cylinder reaches target pressure value
Pressure keeps constant, closes check-valves.During pressurising, the piston rod in cylinder is outside with the rise of air pressure in cylinder
Stretch out, and driving pressure sensor, the knife-edge loading pressure head and tooth form slideway forward slip that slide moment of flexure application component, tooth form cunning
Road using in serrate slot knife-edge loading pressure head knife-edge overhead rotated as fulcrum and make test specimen at one end by axial compressive force with
The effect of moment of flexure, can give test specimen offer corresponding reaction force while fixing end load applies component in the test specimen other end（Including
Axial compressive force and moment of flexure）, test specimen occured bending and deformation, realized with this to test specimen brace pre axial force and moment of flexure.
The moment of flexure, which applies component, can be adjusted flexibly the level and knife-edge loading pressure head insertion tooth form of Axial-output pressure
The eccentric throw of track diverse location, realizes a variety of initial axle powers and moment of flexure load cases combination.
During to cylinder pressurising, dynamic collecting instrument is measured, remembered in real time by pressure sensor and displacement meter respectively
Record pressure of the cylinder piston rod to pressure sensor（Namely the axial compressive force value that test specimen two ends portion is subject to）With test specimen two ends portion axle
It is shown in displacement and in real time terminal.
The contactless strain displacement measuring instrument measures, records the amount of deflection in the middle part of test specimen and is shown in calculating in real time in real time
Machine terminal.
Coordinate brace pre axial force, the experimental method of the test piece fixing device of moment of flexure of impact experiment, comprise the following steps：
The first step, adjusts the position that sliding end load applies component and fixing end load application component according to piece lengths, will try
Part two ends are individually fixed on the fixture of two ends charging assembly；
Second step, regulation two ends load applies position of the knife-edge loading pressure head of component on tooth form slideway；
3rd step, opens dynamic collecting instrument, pressure sensor, displacement transducer and terminal, and terminal starts reality
Shi Jilu simultaneously shows test piece end pressure and end axial displacement；Check-valves is opened, axle power and moment of flexure according to needed for experiment
The target pressurising level and starting device for setting gas pressurized system start air when pressure reaches target, pressure in pressurising, cylinder
Pressurizing system is automatically stopped pressurising and maintains inner pressure of air cylinder value to keep constant, closes check-valves, pressurising terminates, that is, completes test specimen
Preloading；
4th step, opens contactless strain displacement measuring instrument and terminal, and terminal starts to record and show in real time
Show amount of deflection in the middle part of test specimen.Pendulum is adjusted to object height, pendulum is discharged, pendulum completes the impact to test specimen, while data acquisition
Amount of deflection change in the middle part of external pressure suffered by test specimen in whole impact process, axial displacement and test specimen is recorded and shown in real time by system
Terminal is shown in, and according to axle power and bemding moment formula（1）The axle power of test specimen axis direction optional position and moment of flexure is synchronous
Preserve in real time and be shown in terminal；
(1)
Symbolic interpretation in formula：
：The axle power measured by the load transducer and data collecting system；
：Test specimen upper and lower end is as the axle power caused by xial feed；
：Test specimen upper and lower end correspondence eccentric throw；
：Test specimen upper and lower end is as the moment of flexure caused by xial feed；
5th step, prints out test data, pass hull closure, the test specimen after dismounting impact.
It the foregoing is only within the spirit and principle of invention, any modification, equivalent substitution and improvements done etc. all should be included
Within protection scope of the present invention.
In addition to technical characteristic described in specification, remaining technical characteristic is technology known to those skilled in the art, in order to prominent
Go out the innovative characteristicses of the present invention, above-mentioned technical characteristic will not be repeated here.
Claims (9)
1. a kind of brace pre axial force, the test piece fixing device of moment of flexure of cooperation impact experiment, the device include：Rigid base, slip
Hold load to apply component, fixing end load and apply component, pendulum, test specimen, data collecting system and terminal, its feature 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, the sliding end load, which applies component, to be included sliding axle force applying assembly, slides moment of flexure application
Institute is sequentially fixed in component, gas pressurized system and pneumatic charging assembly, the positive front end of pneumatically loading component by high-strength bolt
State sliding axle force applying assembly and slide moment of flexure and apply component, it is firm that the fixing end load application component is fixed on the fixing end
On property base.
2. brace pre axial force, the test piece fixing device of moment of flexure of a kind of cooperation impact experiment according to claim 1, its feature
It is, the slip axle power charging assembly further comprises slide cartridge, dividing plate, pressure sensor and protective cover.
3. brace pre axial force, the test piece fixing device of moment of flexure of a kind of cooperation impact experiment according to claim 1, its feature
It is, the slip moment of flexure applies component and further comprises arc track, knife-edge loading pressure head, rotary clamp, tooth form slideway, turns
In the serrate slot of the embedded tooth form slideway of knife-edge head of knife-edge loading pressure head described in dynamic clamp test specimen one end, and knife-edge adds
Tooth form slideway in A/F of the knife-edge head thickness less than serrate slot of pressure head, loading procedure is carried to press with knife-edge loading in serrate slot
Head knife-edge overhead is fulcrum.
4. a kind of brace pre axial force of cooperation impact experiment according to claim 1 and 2, the test piece fixing device of moment of flexure, its
It is characterised by, the pneumatically loading component further comprises backing plate, cylinder, holding clamp, the rigid bottom of the backing plate and sliding end
Seat connection, the cylinder is fixed on the backing plate by holding clamp, and the end of the cylinder piston rod passes through the dividing plate
Connected with pressure sensor, the cylinder in the pneumatically loading component work independently under can applying component not assembling moment of flexure,
Realize experimental study of the test specimen under the loading of simple axle power.
5. brace pre axial force, the test piece fixing device of moment of flexure of a kind of cooperation impact experiment according to claim 1, its feature
Be, the gas pressurized system is connected by high-pressure air pipe and the cylinder, be connected with the conduit for control cylinder and
Gas pressurized system connectivity can set the target pressurising level to cylinder, gas with the check-valves blocked, the gas pressurized system
Air pressurizing system is automatically stopped pressurising and maintains inner pressure of air cylinder value to keep constant when in-cylinder pressure reaches target pressure value.
6. brace pre axial force, the test piece fixing device of moment of flexure of a kind of cooperation impact experiment according to claim 1, its feature
It is, the fixing end load, which applies component, includes arc track, knife-edge loading pressure head, rotary clamp, tooth form slideway and adjustable
Fixed plate is saved, the rotary clamp clamps the test specimen other end, and the end of blade type loading pressure head is solid by the adjustable fixed plate
Due to fixing end rigid base.
7. brace pre axial force, the test piece fixing device of moment of flexure of a kind of cooperation impact experiment according to claim 1, its feature
It is, the data collecting system includes pressure sensor, displacement transducer, dynamic collecting instrument, contactless strain displacement and surveyed
Instrument and terminal are measured, the pressure sensor and displacement transducer are connected by data line and dynamic collecting instrument, institute
State dynamic collecting instrument and contactless strain displacement measuring instrument to connect by data line and terminal communication, number
Amount of deflection change in the middle part of the external pressure suffered by test specimen in whole impact process, axial displacement and test specimen is remembered in real time according to acquisition system
Record, be shown in terminal, and according to axle power and calculation of Bending Moment formula by test piece end axle power as caused by axle pressure and curved
Square synchronously preserves and is shown in terminal in real time.
8. brace pre axial force, the test piece fixing device of moment of flexure of a kind of cooperation impact experiment according to claim 1, its feature
It is, the moment of flexure, which applies component, can be adjusted flexibly the level and knife-edge loading pressure head insertion toothed track of Axial-output pressure
The eccentric throw of diverse location, realizes a variety of initial axle powers and moment of flexure load cases combination.
9. a kind of brace pre axial force for coordinating impact experiment according to claim 1, the experiment of the test piece fixing device of moment of flexure
Method, it is characterised in that comprise the following steps：
The first step, adjusts the position that sliding end load applies component and fixing end load application component according to piece lengths, will try
Part two ends are individually fixed on the fixture of two ends charging assembly；
Second step, according to brace pre axial force and moment of flexure numerical value, calculation testing piece two ends eccentric throw, and adjusts two ends load application group accordingly
Position of the knife-edge loading pressure head of part on tooth form slideway；
3rd step, opens dynamic collecting instrument, pressure sensor, displacement meter and terminal, and terminal starts real-time note
Record and show test piece end pressure and end axial displacement；Check-valves is opened, axle power and moment of flexure setting according to needed for experiment
The target pressurising level and starting device of gas pressurized system start gas pressurized when pressure reaches target, pressure in pressurising, cylinder
System is automatically stopped pressurising and maintains inner pressure of air cylinder value to keep constant, closes check-valves, pressurising terminates, that is, completes the pre- of test specimen
Loading；
4th step, opens contactless strain displacement measuring instrument and terminal, and terminal starts to record and show in real time
Show amount of deflection in the middle part of test specimen, regulation pendulum to object height discharges pendulum, pendulum completes the impact to test specimen, while data acquisition
External pressure, axial displacement and test specimen middle part amount of deflection suffered by test specimen in whole impact process are recorded, are shown in meter by system in real time
Calculation machine terminal, and it is according to axle power and bemding moment formula that the axle power of test specimen axis direction optional position and end moment of flexure is synchronous aobvious in real time
It is shown in terminal；
5th step, prints out test data, pass hull closure, the test specimen after dismounting impact.
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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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| CN201910897209.5A Active CN110618044B (en) | 2017-06-22 | 2017-06-22 | Impact experiment method for pre-adding axial force and bending moment |
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| 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 |
| CN109540448A (en) * | 2018-11-30 | 2019-03-29 | 安徽威成精密铸造有限公司 | A kind of filter quality detection percussion test device |
| CN112945738A (en) * | 2021-01-29 | 2021-06-11 | 中国原子能科学研究院 | Mechanical test device |
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Also Published As
| Publication number | Publication date |
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| CN110618044B (en) | 2021-11-09 |
| CN110618044A (en) | 2019-12-27 |
| CN107101881B (en) | 2019-10-22 |
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