CN110261055A - A kind of large-scale precision impact test system - Google Patents
A kind of large-scale precision impact test system Download PDFInfo
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- CN110261055A CN110261055A CN201910665427.6A CN201910665427A CN110261055A CN 110261055 A CN110261055 A CN 110261055A CN 201910665427 A CN201910665427 A CN 201910665427A CN 110261055 A CN110261055 A CN 110261055A
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- 238000009863 impact test Methods 0.000 title claims abstract description 23
- 238000013016 damping Methods 0.000 claims abstract description 35
- 238000012360 testing method Methods 0.000 claims abstract description 33
- 239000007788 liquid Substances 0.000 claims abstract description 26
- 230000035939 shock Effects 0.000 claims abstract description 13
- 238000002474 experimental method Methods 0.000 claims abstract description 6
- 230000001360 synchronised effect Effects 0.000 claims description 32
- 229910000831 Steel Inorganic materials 0.000 claims description 19
- 239000010959 steel Substances 0.000 claims description 19
- 238000010276 construction Methods 0.000 claims description 12
- 230000007704 transition Effects 0.000 claims description 12
- 239000011159 matrix material Substances 0.000 claims description 10
- 239000002828 fuel tank Substances 0.000 claims description 8
- 230000007246 mechanism Effects 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 8
- 239000004576 sand Substances 0.000 claims description 7
- 230000003447 ipsilateral effect Effects 0.000 claims description 6
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 3
- 239000004567 concrete Substances 0.000 claims description 3
- 239000002689 soil Substances 0.000 claims description 3
- 238000011160 research Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 10
- 239000002360 explosive Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 238000004880 explosion Methods 0.000 description 8
- 230000006378 damage Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 235000017899 Spathodea campanulata Nutrition 0.000 description 2
- 238000005474 detonation Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- -1 401 Substances 0.000 description 1
- 241001269238 Data Species 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
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- 238000011161 development Methods 0.000 description 1
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- 230000005670 electromagnetic radiation Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
- F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
- F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
- F16F9/18—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein
- F16F9/19—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein with a single cylinder and of single-tube type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
- F16F9/3235—Constructional features of cylinders
- F16F9/3242—Constructional features of cylinders of cylinder ends, e.g. caps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/36—Special sealings, including sealings or guides for piston-rods
- F16F9/366—Special sealings, including sealings or guides for piston-rods functioning as guide only, e.g. bushings
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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
-
- 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
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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
-
- 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
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
-
- 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
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
-
- 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
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0067—Fracture or rupture
-
- 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention relates to a kind of large-scale precision impact test systems, it include: gas-liquid boosting hydraulic cylinder, shock plate, sub-truss, mobile lifting platform, damping buffer unit, boundary constraint device and foundation, the gas-liquid boosting hydraulic cylinder is arranged on sub-truss, the high speed rod end of gas-liquid boosting hydraulic cylinder is provided with the shock plate for impact test, sub-truss is arranged on foundation and forms closed frame structure with foundation, the mobile lifting platform is arranged on foundation and is located at below sub-truss, damping buffer unit is arranged in the middle part of mobile lifting platform, boundary constraint device is symmetricly set on mobile lifting platform both sides of the upper end, test specimen is knocked to be arranged on damping buffer unit and clamp positioning by boundary constraint device.The present invention has stable structure, can be used as the benchmark calibration experiment porch of research blast impulse, has the advantages such as reproducible, precision is high, economical and efficient.
Description
Technical field
The present invention relates to impact test technology, specifically a kind of large-scale precision impact test system.
Background technique
Traditional explosion effect research means rely primarily on charging explosion test on site, but due near region explosion time high temperature
Detonation product mixes generation burning with surrounding air and forms fireball area, the strong electromagnetic radiation of explosive detonation generation, a large amount of electrifications
Particle, solid particle, flame and high temperature cause measurement environment extremely complex harsh, therefore sensor easily damages, measuring signal
It is fallen into oblivion completely by severe jamming or even mechanics parameter signal, the dynamic response mechanics parameter measurement of structural elements weighs
Renaturation has already decreased to the degree for being difficult to receive.It is especially influenced by fireball masking, optical measuring apparatus cannot be used, it is high
Fast video camera can not take the vision signal of test piece deformation in this region, destruction, and test piece deformation-destruction generation, development
Change procedure studies new reinforcement technique (new material, new structural member, reinforcement for analyzing the failure mode and mechanism of test specimen
Thin portion structure) and anti-explosion design method be most important information material.
Near region explosive load feature is that peak overpressure is high, action time is short, foreign countries it is existing experience have shown that, large-scale precision impact
Experimental system can produce such load waveform.It relies solely on explosive charge and carries out damage effect research disappearing in time and funds
Any country does not afford to do in consumption, and uses the large-scale precision impact of non-explosive method that can carry out simulated test,
Class blast pressure/momentum waveform true to nature is generated, it is not only reproducible, but also test can get pressure, strain, position every time
The protection designs such as shifting, acceleration and valid data necessary to assessment are injured, the test period can be greatly shortened, save a large amount of examinations
Reasearch funds are tested, high-speed camera is especially available with and observes test piece deformation from different perspectives to destructive process, obtain full mistake
The image data of journey, this for Engineering Structure Distortion and failure mechanism analysis and reinforce and to injure evaluation studies be very heavy
The basic data wanted.
Currently, domestic explosive charge, which is tested, can only often be carried out scale (model) test by conditionalities such as funds, places.
For example, the quick-fried trial charge amount of the prototype of reinforced concrete member generally requires tens kg to several hundred kg or even 1t or more, and it is real
The energy that border acts on test specimen is only the very little part of explosion equivalent, and most energy travel to surrounding in the form of blast wave
It in environment, therefore considers safety and funding problems, scale (model) test can only be carried out；In general, the quick-fried test data of near regionization is equal
It is worth deviation ± 20% or more, even ± 50% dispersion and error be not also rarely seen；Therefore, using the quick-fried test data of near regionization
Come demarcate and verify method for numerical simulation be it is inappropriate, only when lacking reliable precision data one kind it is helpless it
It lifts.
Currently, the large size for applying similar conventional ammunition blast wave load to test specimen using non-explosive method in laboratory is indoor
There are mainly two types of precise experiment systems, a kind of to realize low speed impact, i.e. landing impact testing machine using gravitional force；It is another
It is then Hydraulic servo drive explosive simulator.Currently, domestic built near region simulated test equipment belongs to drop hammer type, and
Most of to drop hammer that quality is all smaller (< 200kg), and effective drop height is lower (< 3m), Impact energy is lower (several hundred ~ a few kJ), main
Dynamic mechanical for carrying out the subsized specimens such as metal, plastics, composite material is tested；And due to using freely falling body side
Formula, therefore shock rate is generally relatively low, can not effectively simulate explosive load waveform, therefore, domestic drop hammer impact testing machine
Accurate impact test is not can be carried out.Major defect is: without the mechanism sprung back after drop impact component is prevented, dropping hammer in test
There is significant rebound with component, secondary pulse problem is quite serious, and measuring system falls behind, equipment poor controllability, main portion
Part precision is lower, smaller using tup area, can only carry out local loading.Therefore test error is quite big, and repeatability is poor,
The requirement of not up to accurate impact experiment, application range are very limited.
The high-speed hydraulic precision impact device that the country can simulate near region explosion at present is substantially blank, leads to destruction mechanism
The basic data of research is deficient, causes to damage effectiveness not being able to satisfy under Information Condition without the truth of a matter for weapon damage effect
With the needs for injuring evaluation studies.
Summary of the invention
For the deficiency in background technique, the object of the present invention is to provide a kind of large-scale precision impact test systems, are used for
Simulate the single-point or multiple spot pyroshock test under different explosive parameters.
To achieve the above object, the invention adopts the following technical scheme: a kind of large-scale precision impact test system, comprising:
Gas-liquid boosting hydraulic cylinder, shock plate, sub-truss, mobile lifting platform, damping buffer unit, boundary constraint device and ground base
Plinth, entire pilot system carries out scragging as power source by least a set of above gas-liquid boosting hydraulic cylinder, described
Gas-liquid boosting hydraulic cylinder be arranged on sub-truss, the high speed rod end of gas-liquid boosting hydraulic cylinder is provided with for impact test
Shock plate, sub-truss are arranged on foundation and form closed frame structure with foundation, and the moving lifting is flat
Platform is arranged on foundation and is located at below sub-truss, and damping buffer unit is arranged in the middle part of mobile lifting platform, boundary
Restraint device is symmetricly set on mobile lifting platform both sides of the upper end, is knocked test specimen and is arranged on damping buffer unit and passes through
Boundary constraint device clamps positioning；
The foundation includes the base matrix made of armored concrete, and the base matrix is arranged in foundation pit,
Foundation pit two sides are fixed with the support earthwork, and bottom of foundation ditch is provided with artificial foundation, and the artificial foundation includes being arranged in soil horizon
On tabia layer, the sand shakeproof layer being arranged on tabia layer and the waterproof layer being arranged on sand shakeproof layer, it is described
Base matrix is made of the cuboid A and cuboid B being solidified as a whole, and the length and width of cuboid A is less than the length of cuboid B
And width, cuboid A is located in the middle part of the bottom surface of cuboid B and the end face and the long axis side cuboid B of cuboid A long axis direction
To an end face it is concordant；Axial pass trough is arranged in the middle part of the end face thereon the cuboid B, interval setting in the middle part of the bottom wall of through slot
It is parallel to the load bearing floor of through slot long axis, the both ends of each load bearing floor are concordant with the both ends of cuboid A long axis direction respectively；
Its bottom wall two sides of the through slot are respectively set the damping trough for being parallel to through slot long axis, the both ends of each damping trough respectively with length
The both ends of cube A long axis direction are concordant, and the lateral wall of each damping trough is coplanar with ipsilateral through slot side wall respectively, each damping trough
Track terrace is additionally provided between adjacent load bearing floor, the upper surface height of the track terrace is less than the upper of load bearing floor
Face height；Its end face middle part for being located at through slot two sides the cuboid B is additionally provided with rectangular channel, is provided in slot to even
Connect the built-in type junction steel plate of portion's sub-truss；
The sub-truss includes unit column, system column and crossbeam, the unit column generally box column knot
Structure is symmetricly set on foundation both sides of the upper end, and the upper surface of two unit columns is connected with crossbeam bottom surface both ends respectively,
The lower end of two unit columns is connected with the built-in type junction steel plate that foundation both sides of the upper end is arranged in respectively, and described is
Unite column and unit column it is contour, system column be also symmetricly set on foundation both sides of the upper end and respectively with ipsilateral unit
Column is connected, and the upper surface of two systems column is arranged in parallel with the crossbeam that spacing is zero, the lower end difference of two systems column
It is connected with the built-in type junction steel plate that foundation both sides of the upper end is arranged in, the crossbeam generally box girder construction,
Width is equal to the width of unit column, is provided in the middle part of crossbeam perpendicular to horizontal plane uniformly distributed to install gas-liquid boosting hydraulic cylinder
Mounting hole；
The mobile lifting platform includes platform, carrying vehicle, synchronous lifting device and parallel orbit, parallel orbit and ground
Track terrace is connected, and the platform generally steel rectangular plate-like structure, two sides are symmetrically arranged with spaced and parallel connection
Plate, is provided with pilot hole on each connecting plate, the carrying vehicle be symmetricly set below the connecting plate of platform two sides and
It is run on track, each carrying vehicle both ends pass through guide post respectively and connect with two connecting plates of platform the same side, each carrying
The both ends of vehicle are provided with synchronous lifting device and pass through the lifting of synchronous lifting device control platform；The carrying vehicle is by two
A car body is composed by connecting rod, and two car bodies are separately positioned below two connecting plates of platform the same side, described
Car body generally rectangular parallelepiped structure, the lower part both ends of car body are provided with rail wheel, are equipped in the middle part of car body upper surface perpendicular to vehicle
The through slot in body length direction, is provided with synchronous lifting device in the middle part of through slot bottom wall, on the through slot bottom wall of synchronous lifting device two sides
It is symmetrically arranged with guide post, the guide post is matched with the pilot hole on corresponding platform connecting plate, the connecting rod front end
It is connected with the rear end of a car body, the front end of connection rod rear end and another car body is connected；The synchronous lifting device is to synchronize
Oil cylinder, synchronous fuel tank are connected by oil cylinder seat and car body through slot bottom wall, and the starting zero-bit of the synchronous fuel tank is lower than car body upper end
Face；Synchronous motor is additionally provided on the carrying vehicle, synchronous motor is arranged in the side of a car body of carrying vehicle and passes through
Deceleration mechanism drives the wheel shaft of a rail wheel on the car body.
The damping buffer unit is by cylinder body, cylinder seat, cylinder cap, piston, connecting rod, loading plate, buffer stopper and guide rod
It constitutes, cylinder seat is connected by bolt and platform, and cylinder body lower end is installed in cylinder seat and is tightly connected with cylinder seat, and cylinder cap is installed in cylinder
Body upper end is simultaneously tightly connected with cylinder body, and piston is arranged in cylinder body and is slidingly sealed cooperation with cylinder body, is respectively arranged in cylinder seat
The air inlet and gas vent being connected with cylinder interior, the piston is the middle part is provided with coaxial axially extending bore A and with logical
It is provided with centered on the A of hole in uniformly distributed axially extending bore C, each axially extending bore C and is provided with guide rod, guide rod lower end is mounted on
In cylinder seat, guide rod upper end is mounted on cylinder cap and is fixed by cylinder cap, is arranged with bullet between guide rod lower end and piston
Spring, the connecting rod are threaded through in the middle part of cylinder cap and are slidingly sealed cooperation with cylinder cap, and connecting rod lower end is solidified as a whole with piston, even
Extension bar upper end and loading plate are connected, and buffer stopper is provided on loading plate；Made of the guide rod generally high-strength alloy steel
Step axle construction, including first step axis, second step axis, transition part and locating shaft, first step axis are threaded through the axis of piston
It is slidingly sealed cooperation into through-hole C and with axially extending bore C, the diameter of first step axis is greater than second step axis, first step axis
Upper end is provided with coaxial locating shaft, and first step axis lower part is provided with coaxial second step axis, first step axis and second
It is provided with transition part between Step Shaft and is solidified as a whole by transition part, the transition part is circular cone structure, thereon end face
Diameter is equal to the diameter of first step axis, and lower end surface diameter is equal to the diameter of second step axis；Cylinder seat end face thereon
Be provided with the mounting hole uniformly distributed correspondingly with the axially extending bore C of piston, the internal diameter of the mounting hole with guide rod second
The crest clearance of rank axis cooperates；Its lower end surface of the cylinder cap is provided with uniformly distributed correspondingly with the axially extending bore C of piston
Location hole, the internal diameter of the location hole and the crest clearance of guide rod locating shaft cooperate；Its inside of the connecting rod is coaxially set
It is equipped with inner hole open at one end, bore openings end is located at the lower end of connecting rod and is connected with the axially extending bore A of piston；Described
For the arrival end of its air inlet of cylinder seat by check-valves and external feed stream pipeline connection, the outlet end of cylinder seat gas vent passes through pressure reducing valve
It is connected to external circuit.
The boundary constraint device includes moving left holding device and moving right holding device, moves left holding device and sets
It sets and moves right the right side that platform long axis is arranged in holding device in the left side of platform long axis, left and right mobile holding device is about flat
The long axial symmetry of platform, the holding device that moves left include guide rail group, bottom plate, column, crossbeam, movable block, withstanding tight block and consolidate
Determine block, described its quantity of guide rail group is two, and each guide rail group is made of the linear guide that a pair is parallel to platform short axle, two
A guide rail group is arranged at intervals on the left side in land lengths direction, on the experiment porch between two linear guides of each guide rail group
It is provided with fixed block, a bottom plate is provided with above each guide rail group, the bottom plate can by fixed block and platform
Disassembly is connected, and bottom plate bottom surface both side passes through sliding block respectively and runs in parallel linear guide, and bottom plate upper surface is perpendicular to leading
The side of rail is arranged at intervals with the column perpendicular to bottom plate upper surface, and the top of two bottom plates and difference is arranged in the crossbeam
It is connected with the upper end of each column on two bottom plates, being arranged with respectively on the crossbeam between two adjacent columnss can be long in crossbeam
The movable block moved in axis direction is provided with the withstanding tight block to hold out against test specimen in the middle part of each movable block；The movement
The rectangular box type structure of block generally both ends open, outer dimension phase of the outer dimension of both ends open with crossbeam cross section
Cooperation, the two sidewalls of movable block are symmetrically arranged with the pilot hole to install withstanding tight block；The withstanding tight block is by positioning sleeve, standby tight
Nut and fastening bolt are constituted, and the positioning sleeve generally cylindrical structure is internally provided with tapped through hole, tapped through hole
It is inside provided with the fastening bolt to hold out against test specimen, the both ends of positioning sleeve external cylindrical surface are respectively arranged with external screw thread and pass through respectively
Standby tight nut is mounted in the pilot hole of movable block two sidewalls；The cuboid frame knot of the crossbeam generally upper and lower opening
Structure, the two sides of length direction are symmetrically arranged with through slot, and the center of the axis and movable block pilot hole of through slot length direction is contour；
Its lower end surface of the fixed block and platform are connected, and the upper surface of fixed block is provided with uniformly distributed threaded hole according to rectangular array,
The bottom plate is connected by bolt and fixed block；The bottom plate is additionally provided with to hold between the adjacent column in end face thereon
By the baffle of external drive, the baffle lower end and bottom plate are connected, and both ends are connected with column respectively.
Its generally solid girder construction of built-in type steel of the track terrace, cross section are I-shaped, each track
The upper surface of terrace is each parallel to horizontal plane and contour with the upper surface of adjacent orbit terrace, and track terrace is parallel to cuboid B
Long axis and its length be equal to cuboid B length.
The load bearing floor be the solid girder construction of built-in type steel, section be it is I-shaped, each load bearing floor it is upper
End face is each parallel to horizontal plane and contour with the upper surface of adjacent load bearing floor.
The depth of the damping trough is greater than the height of cuboid B.
Basic principle of the invention is: pushing multiple shock modules by multiple high-speed gas-liquid drivers；Every set high speed
The piston rod front end of gas-liquid driver connects a shock module, (respectively covers when these hit when module accelerates to certain speed
Hitting module speed may be the same or different), while impact structure/component prototype；By adjusting shock module
Structure and quality and control its stroke speed, be allowed to the specific impulse acted on full size component and the explosion of practical conventional ammunition
The specific impulse acted on structural elements is identical, so that reaching the explosion of realistic simulation conventional ammunition injures effect to structure/component
It answers.
The beneficial effects of the present invention are: the present invention uses most newly developed gas-liquid boosting hydraulic cylinder as driving source, pass through
Total structure design, entire pilot system have stable structure, and the benchmark calibration experiment that can be used as research blast impulse is flat
Platform has the advantages such as reproducible, precision is high, economical and efficient, it is possible to provide enough accurately experimental datas are blast impulse power
The correlative study means (such as numerical simulation) for learning research provide verifying and calibration.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention.
Fig. 2 is top view of the invention.
Fig. 3 is main view of the invention.
Fig. 4 is side view of the invention.
Fig. 5 is the schematic diagram of Toft foundation structure.
Fig. 6 is the perspective view of basic ontology.
Fig. 7 is the main view of basic ontology.
Fig. 8 is the schematic diagram of mobile lifting platform.
Fig. 9 is the main view of mobile lifting platform.
Figure 10 is the schematic diagram of damping buffer unit.
Figure 11 is the schematic diagram of piston in damping buffer unit.
Figure 12 is the schematic diagram of boundary constraint device.
Figure 13 is the schematic diagram of movable block in boundary constraint device.
Figure 14 is the schematic diagram of withstanding tight block in boundary constraint device.
In figure, 1, track, 2, platform, 201, connecting plate, 202, pilot hole, 301, car body, 302, connecting rod, 303, synchronization
Motor, 304, rail wheel, 305, deceleration mechanism, 306, wheel shaft, 4, synchronous fuel tank, 401, oil cylinder seat,
5, damping buffer unit, 501, cylinder body, 502, cylinder seat, 503, cylinder cap, 504, piston, 505, connecting rod, 506, loading plate,
507, buffer stopper, 508, guide rod, 509, air inlet, 510, gas vent, 541, axially extending bore A, 542, axially extending bore C, 581,
First step axis, 582, second step axis, 583, transition part, 584, locating shaft, 585, spring,
601, bottom plate, 602, column, 603, crossbeam, 604, movable block, 605, withstanding tight block, 606, fixed block, 608, linear guide,
609, baffle, 651, positioning sleeve, 652, standby tight nut, 653, fastening bolt,
7, base matrix, 701, cuboid A, 702, cuboid B, 703, through slot 3,704, load bearing floor, 705, damping trough, 706,
Track terrace, 707, junction steel plate, 708, pile foundation, 709, waterproof layer, 710, sand shakeproof layer, 711, tabia layer,
8, gas-liquid boosting hydraulic cylinder,
901, unit column, 902, system column, 903, system crossbeam.
10, guide post, 11, shock plate.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings of the specification.
As shown in Figure 1, Figure 2, Figure 3, Figure 4, a kind of large-scale precision impact test system, comprising: gas-liquid boosting hydraulic cylinder 8,
Shock plate 11, sub-truss, mobile lifting platform, damping buffer unit 5, boundary constraint device and foundation, it is entire to test
System carries out scragging, the gas-liquid speedup as power source by least a set of above gas-liquid boosting hydraulic cylinder 8
Hydraulic cylinder 8 is arranged on sub-truss 9, and the high speed rod end of gas-liquid boosting hydraulic cylinder 8 is provided with the shock plate for impact test
11, sub-truss 9 is arranged on foundation and forms closed frame structure with foundation, and the mobile lifting platform is set
It sets on foundation and is located at below sub-truss 9, damping buffer unit 5 is arranged in the middle part of mobile lifting platform, and boundary is about
Bundle device is symmetricly set on mobile lifting platform both sides of the upper end, is knocked test specimen and is arranged on damping buffer unit 5 and passes through
Boundary constraint device clamps positioning；
The foundation includes base matrix 7 made of armored concrete, and the base matrix 7 is arranged in foundation pit
Interior, foundation pit two sides are fixed with the support earthwork, and bottom of foundation ditch is provided with artificial foundation, and the artificial foundation includes being arranged in soil
Tabia layer 711 on layer, the sand shakeproof layer 710 being arranged on tabia layer 711 and it is arranged on sand shakeproof layer 710
Waterproof layer 709, the base matrix 7 are made of the cuboid A701 and cuboid B702 being solidified as a whole, cuboid A701's
Length and width is less than the length and width of cuboid B702, and cuboid A701 is located in the middle part of the bottom surface of cuboid B702 and long
One end face of cube A701 long axis direction is concordant with an end face of cuboid B702 long axis direction；The cuboid B702 is thereon
Axial pass trough 703 is arranged in the middle part of end face, is arranged at intervals with the load for being parallel to 703 long axis of through slot in the middle part of the bottom wall of through slot 703
Terrace 704, the both ends of each load bearing floor 704 are concordant with the both ends of cuboid A701 long axis direction respectively；The through slot 703
Its bottom wall two sides is respectively set the damping trough 705 for being parallel to 703 long axis of through slot, the both ends of each damping trough 705 respectively with length
The both ends of cube A701 long axis direction are concordant, and the lateral wall of each damping trough 705 is coplanar with ipsilateral 703 side wall of through slot respectively,
Track terrace 706, the upper end of the track terrace 706 are additionally provided between each damping trough 705 and adjacent load bearing floor 704
Face height is less than the upper surface height of load bearing floor 704；The cuboid B702 it is located in the middle part of the end face of 703 two sides of through slot
It is additionally provided with rectangular channel, the built-in type junction steel plate 707 to connect upper support truss is provided in slot；
The sub-truss includes unit column 901, system column 902 and system crossbeam 903, the unit column 901
Generally box column structure is symmetricly set on 7 both sides of the upper end of foundation, the upper surface point of two unit columns 901
It is not connected with system crossbeam bottom surface both ends, the lower end of two unit columns 901 is respectively with setting in 7 both sides of the upper end of foundation
Built-in type junction steel plate 707 be connected, the system column 902 and unit column 901 is contour, system column 902 also symmetrically
7 both sides of the upper end of foundation is set and is connected respectively with ipsilateral unit column 901, the upper end of two systems column 902
Face is arranged in parallel with the system crossbeam 903 that spacing is zero, and the lower end of two systems column 902 is respectively with setting in foundation 7
The built-in type junction steel plate 707 of both sides of the upper end is connected, the system crossbeam 903 generally box girder construction, width etc.
In the width of unit column 901,903 middle part of system crossbeam is provided with uniformly distributed to install gas-liquid speedup liquid perpendicular to horizontal plane
The mounting hole of cylinder pressure 8；
The mobile lifting platform includes platform 2, carrying vehicle, synchronous lifting device and parallel orbit 1, parallel orbit 1 and ground
The track terrace 706 of base is connected, the platform 2 generally steel rectangular plate-like structure, and it is flat that two sides are symmetrically arranged with interval
Capable connecting plate 201 is provided with pilot hole 202 on each connecting plate 201, and the carrying vehicle is symmetricly set on 2 liang of platform
201 lower section of connecting plate of side is simultaneously run on track 1, and each carrying vehicle both ends pass through guide post 10 and 2 the same side of platform respectively
The connection of two connecting plates 201, the both ends of each carrying vehicle are provided with synchronous lifting device and by synchronous lifting device controls
The lifting of platform 2 processed；The carrying vehicle is composed of two car bodies 301 by connecting rod 302, and two car bodies 301 are distinguished
It is arranged in below two connecting plates 201 of 2 the same side of platform, the generally rectangular parallelepiped structure of car body 301, car body 301
Lower part both ends are provided with rail wheel 304, and the through slot perpendicular to 301 length direction of car body is equipped in the middle part of 301 upper surface of car body, is led to
It is provided with synchronous lifting device in the middle part of groove bottom wall, is symmetrically arranged with guide post 10 on the through slot bottom wall of synchronous lifting device two sides,
The guide post 10 is matched with the pilot hole 202 on corresponding platform connecting plate 201,302 front end of connecting rod with one
The rear end of car body 301 is connected, and the front end of 302 rear end of connecting rod and another car body 301 is connected；It is additionally provided on the carrying vehicle
Synchronous motor 303, synchronous motor 303 are arranged in the side of a car body 301 of carrying vehicle and should by the driving of deceleration mechanism 305
The wheel shaft 306 of a rail wheel 304 on car body；The synchronous lifting device 4 is synchronous fuel tank, and synchronous fuel tank passes through oil cylinder seat
401 are connected with 301 through slot bottom wall of car body, and the starting zero-bit of the synchronous fuel tank 4 is lower than 301 upper surface of car body.
The damping buffer unit is by cylinder body 501, cylinder seat 502, cylinder cap 503, piston 504, connecting rod 505, loading plate
506, buffer stopper 507 and guide rod 508 are constituted, and cylinder seat 502 is connected by bolt and platform 2, and 501 lower end of cylinder body is installed in cylinder seat
It is tightly connected on 502 and with cylinder seat 502, cylinder cap 503 is installed in 501 upper end of cylinder body and is tightly connected with cylinder body 501, piston 504
It is arranged in cylinder body 501 and is slidingly sealed cooperation with cylinder body 501, is respectively arranged in cylinder seat 502 and is connected with inside cylinder body 501
Air inlet 509 and gas vent 510, the piston 504 is the middle part is provided with coaxial axially extending bore A541 and with through-hole
It is provided with centered on A541 in uniformly distributed axially extending bore C542, each axially extending bore C541 and is provided with guide rod 508, guide rod
508 lower ends are mounted in cylinder seat, and 508 upper end of guide rod is mounted on cylinder cap 503 and is fixed by cylinder cap 503, guide rod
Spring 585 is arranged between lower end and piston, the connecting rod 505 is threaded through 503 middle part of cylinder cap and slides with cylinder cap 503 close
Envelope cooperation, 505 lower end of connecting rod are solidified as a whole with piston 504, and 505 upper end of connecting rod and loading plate 506 are connected, loading plate 506
On be provided with buffer stopper 507；Step axle construction made of the generally high-strength alloy steel of guide rod 508, including First
Rank axis 581, second step axis 582, transition part 583 and locating shaft 584, the axial direction that first step axis 581 is threaded through piston 504 are logical
It is slidingly sealed cooperation in the C542 of hole and with axially extending bore C542, the diameter of first step axis 581 is greater than second step axis 582, the
One Step Shaft, 581 upper end is provided with coaxial locating shaft 584, and 581 lower part of first step axis is provided with coaxial second step axis
582, it is provided with transition part 583 between first step axis 581 and second step axis 582 and is solidified as a whole by transition part 583, institute
The transition part 583 stated is circular cone structure, and end face diameter is equal to the diameter of first step axis 581, lower end surface diameter etc. thereon
In the diameter of second step axis 582；End face is provided with the axially extending bore C542 of piston 504 one by one the cylinder seat 502 thereon
Corresponding uniformly distributed mounting hole, the internal diameter of the mounting hole and the crest clearance of guide rod second step axis 582 cooperate；Described
Its lower end surface of cylinder cap 503 is provided with the location hole uniformly distributed correspondingly with the axially extending bore C542 of piston 504, the location hole
Internal diameter and guide rod locating shaft 584 crest clearance cooperate；The connecting rod 505 is coaxially arranged with inside it open at one end
Inner hole 551,551 open end of inner hole is located at the lower end of connecting rod 505 and is connected with the axially extending bore A541 of piston 504；Institute
The arrival end for cylinder seat 502 its air inlet 509 stated is gone out by check-valves and external feed stream pipeline connection, cylinder seat gas vent 510
Mouth end is connected to by pressure reducing valve with external circuit.
The boundary constraint device includes moving left holding device and moving right holding device, moves left holding device and sets
It sets and moves right the right side that platform long axis is arranged in holding device in the left side of platform long axis, left and right mobile holding device is about flat
The long axial symmetry of platform 2, the holding device that moves left includes guide rail group, bottom plate 601, column 602, crossbeam 603, movable block
604, withstanding tight block 605 and fixed block 606, described its quantity of guide rail group are two, and each guide rail group is parallel to platform by a pair
The linear guide 608 of short axle is constituted, and two guide rail groups are arranged at intervals on the left side of 2 length direction of platform, and the two of each guide rail group
It is provided with fixed block 606 on platform 2 between a linear guide 608, a bottom plate is provided with above each guide rail group
601, the bottom plate 601 is removably connected by fixed block 606 and platform 2, and 601 bottom surface both side of bottom plate passes through sliding block respectively
609 run in parallel linear guide 608,601 upper surface of bottom plate perpendicular to the side of guide rail 608 be arranged at intervals with perpendicular to
The column 602 of 601 upper surface of bottom plate, the crossbeam 603 be arranged in the top of two bottom plates 601 and respectively with two bottom plates
The upper end of each column 602 on 601 is connected, and being arranged with respectively on the crossbeam 603 between two adjacent columnss 602 can be in crossbeam
The movable block 604 moved on 603 long axis directions, the middle part of each movable block 604 are provided with the withstanding tight block to hold out against test specimen
605；The rectangular box type structure of the generally both ends open of movable block 604, the outer dimension of both ends open is and crossbeam
The outer dimension of 603 cross sections matches, and the two sidewalls of movable block 604 are symmetrically arranged with the assembly to install withstanding tight block 605
Hole；The withstanding tight block 605 is made of positioning sleeve 651, standby tight nut 652 and fastening bolt 653, and the positioning sleeve 651 is whole
Body is cylindrical structure, is internally provided with tapped through hole, the fastening bolt to hold out against test specimen is provided in tapped through hole
653, the both ends of 651 external cylindrical surface of positioning sleeve are respectively arranged with external screw thread and are mounted on movable block by standby tight nut 652 respectively
In the pilot hole of 604 two sidewalls；The cuboid frame structure of the generally upper and lower opening of crossbeam 603, length direction
Two sides are symmetrically arranged with through slot, and the center of the axis and 604 pilot hole of movable block of through slot length direction is contour；The fixed block
606 its lower end surface and platform 2 are connected, and the upper surface of fixed block 606 is provided with uniformly distributed threaded hole according to rectangular array, described
Bottom plate 601 is connected by bolt and fixed block 606；The bottom plate 601 is additionally provided between the adjacent column 602 in end face thereon
To bear the baffle 609 of external drive, 609 lower end of baffle and bottom plate 601 are connected, and both ends are connected with column 602 respectively.
Its generally solid girder construction of built-in type steel of the track terrace 706, cross section are I-shaped, each rail
The upper surface of road terrace 706 is each parallel to horizontal plane and contour with the upper surface of adjacent orbit terrace 704, and track terrace 706 is flat
Row is in length of the long axis and its length of cuboid B702 equal to cuboid B702.
The load bearing floor 704 is the solid girder construction of built-in type steel, and section is I-shaped, each load bearing floor
704 upper surface is each parallel to horizontal plane and contour with the upper surface of adjacent load bearing floor 704.
The depth of the damping trough 705 is greater than the height of cuboid B702.
Gas-liquid boosting hydraulic cylinder is referring to CN201910064612.X used in the present invention.
Application method of the invention: mobile mounting platform initial position is located at the outside of one end below sub-truss, will try
Part is placed on the damping buffer unit on mobile mounting platform by hanging device, is carried out by boundary constraint device to test specimen
Limit is fixed, then mobile mounting platform is driven to enter the testing position below sub-truss, the lifting dress on mobile mounting platform
Whereabouts is set, the platform base of mobile mounting platform is made to be in contact with the load bearing floor on ground, starts gas-liquid boosting hydraulic cylinder, punching
Plate is hit under the driving of gas-liquid boosting hydraulic cylinder, high-speed impact test specimen completes impact test.
In the structure of entire pilot system, individually designed to the unit column progress of sub-truss is to carry out early period
Single test, effect be by test data, to the offer assessment of the structure of system entirety, after meeting condition, then be
Column of uniting, which merges, to be used, and system column when normal assays is avoided to damage.
Part not in the detailed description of the invention is the prior art.
Claims (6)
1. a kind of large-scale precision impact test system, it is characterized in that: include: gas-liquid boosting hydraulic cylinder, shock plate, sub-truss,
Mobile lifting platform, damping buffer unit, boundary constraint device and foundation, entire pilot system is by least a set of above
Gas-liquid boosting hydraulic cylinder carries out scragging as power source, and the gas-liquid boosting hydraulic cylinder is arranged in sub-truss
On, the high speed rod end of gas-liquid boosting hydraulic cylinder is provided with the shock plate for impact test, and sub-truss is arranged in foundation
Closed frame structure above and with foundation is formed, the mobile lifting platform is arranged on foundation and is located at support purlin
Below frame, damping buffer unit is arranged in the middle part of mobile lifting platform, and boundary constraint device is symmetricly set on mobile lifting platform
Both sides of the upper end is knocked test specimen and is arranged on damping buffer unit and clamps positioning by boundary constraint device；
The foundation includes the base matrix made of armored concrete, and the base matrix is arranged in foundation pit,
Foundation pit two sides are fixed with the support earthwork, and bottom of foundation ditch is provided with artificial foundation, and the artificial foundation includes being arranged in soil horizon
On tabia layer, the sand shakeproof layer being arranged on tabia layer and the waterproof layer being arranged on sand shakeproof layer, it is described
Base matrix is made of the cuboid A and cuboid B being solidified as a whole, and the length and width of cuboid A is less than the length of cuboid B
And width, cuboid A is located in the middle part of the bottom surface of cuboid B and the end face and the long axis side cuboid B of cuboid A long axis direction
To an end face it is concordant；Axial pass trough is arranged in the middle part of the end face thereon the cuboid B, interval setting in the middle part of the bottom wall of through slot
It is parallel to the load bearing floor of through slot long axis, the both ends of each load bearing floor are concordant with the both ends of cuboid A long axis direction respectively；
Its bottom wall two sides of the through slot are respectively set the damping trough for being parallel to through slot long axis, the both ends of each damping trough respectively with length
The both ends of cube A long axis direction are concordant, and the lateral wall of each damping trough is coplanar with ipsilateral through slot side wall respectively, each damping trough
Track terrace is additionally provided between adjacent load bearing floor, the upper surface height of the track terrace is less than the upper of load bearing floor
Face height；Its end face middle part for being located at through slot two sides the cuboid B is additionally provided with rectangular channel, is provided in slot to even
Connect the built-in type junction steel plate of portion's sub-truss；
The sub-truss includes unit column, system column and crossbeam, the unit column generally box column knot
Structure is symmetricly set on foundation both sides of the upper end, and the upper surface of two unit columns is connected with crossbeam bottom surface both ends respectively,
The lower end of two unit columns is connected with the built-in type junction steel plate that foundation both sides of the upper end is arranged in respectively, and described is
Unite column and unit column it is contour, system column be also symmetricly set on foundation both sides of the upper end and respectively with ipsilateral unit
Column is connected, and the upper surface of two systems column is arranged in parallel with the crossbeam that spacing is zero, the lower end difference of two systems column
It is connected with the built-in type junction steel plate that foundation both sides of the upper end is arranged in, the crossbeam generally box girder construction,
Width is equal to the width of unit column, is provided in the middle part of crossbeam perpendicular to horizontal plane uniformly distributed to install gas-liquid boosting hydraulic cylinder
Mounting hole；
The mobile lifting platform includes platform, carrying vehicle, synchronous lifting device and parallel orbit, parallel orbit and ground
Track terrace is connected, and the platform generally steel rectangular plate-like structure, two sides are symmetrically arranged with spaced and parallel connection
Plate, is provided with pilot hole on each connecting plate, the carrying vehicle be symmetricly set below the connecting plate of platform two sides and
It is run on track, each carrying vehicle both ends pass through guide post respectively and connect with two connecting plates of platform the same side, each carrying
The both ends of vehicle are provided with synchronous lifting device and pass through the lifting of synchronous lifting device control platform；The carrying vehicle is by two
A car body is composed by connecting rod, and two car bodies are separately positioned below two connecting plates of platform the same side, described
Car body generally rectangular parallelepiped structure, the lower part both ends of car body are provided with rail wheel, are equipped in the middle part of car body upper surface perpendicular to vehicle
The through slot in body length direction, is provided with synchronous lifting device in the middle part of through slot bottom wall, on the through slot bottom wall of synchronous lifting device two sides
It is symmetrically arranged with guide post, the guide post is matched with the pilot hole on corresponding platform connecting plate, the connecting rod front end
It is connected with the rear end of a car body, the front end of connection rod rear end and another car body is connected；The synchronous lifting device is to synchronize
Oil cylinder, synchronous fuel tank are connected by oil cylinder seat and car body through slot bottom wall, and the starting zero-bit of the synchronous fuel tank is lower than car body upper end
Face；Synchronous motor is additionally provided on the carrying vehicle, synchronous motor is arranged in the side of a car body of carrying vehicle and passes through
Deceleration mechanism drives the wheel shaft of a rail wheel on the car body.
2. a kind of large-scale precision impact test system according to claim 1, it is characterized in that: the damping buffer unit
It is made of cylinder body, cylinder seat, cylinder cap, piston, connecting rod, loading plate, buffer stopper and guide rod, cylinder seat is solid by bolt and platform
Even, cylinder body lower end is installed in cylinder seat and is tightly connected with cylinder seat, and cylinder cap is installed in cylinder body upper end and is tightly connected with cylinder body, living
Plug, which is arranged in cylinder body and with cylinder body, is slidingly sealed cooperation, be respectively arranged in cylinder seat the air inlet being connected with cylinder interior and
Gas vent, it is logical that the piston is provided with uniformly distributed axial direction the middle part is provided with coaxial axially extending bore A and centered on through-hole A
It is provided with guide rod in hole C, each axially extending bore C, guide rod lower end is mounted in cylinder seat, and guide rod upper end is mounted on cylinder cap
It above and by cylinder cap is fixed, spring is arranged between guide rod lower end and piston, the connecting rod is threaded through in cylinder cap
Portion is simultaneously slidingly sealed cooperation with cylinder cap, and connecting rod lower end is solidified as a whole with piston, and connecting rod upper end and loading plate are connected, loading plate
On be provided with buffer stopper；Step axle construction made of the guide rod generally high-strength alloy steel, including first step axis,
Two Step Shafts, transition part and locating shaft, first step axis are threaded through in the axially extending bore C of piston and slide with axially extending bore C close
The diameter of envelope cooperation, first step axis is greater than second step axis, and first step axis upper end is provided with coaxial locating shaft, First
Rank axis lower part is provided with coaxial second step axis, and transition part is provided between first step axis and second step axis and was passed through
The portion of crossing is solidified as a whole, and the transition part is circular cone structure, and end face diameter is equal to the diameter of first step axis, lower end thereon
Face diameter is equal to the diameter of second step axis；End face is provided with and the axially extending bore C of piston one-to-one correspondence the cylinder seat thereon
Uniformly distributed mounting hole, the crest clearance of the internal diameter of the mounting hole and guide rod second step axis cooperates；The cylinder cap its
Lower end surface is provided with the location hole uniformly distributed correspondingly with the axially extending bore C of piston, the internal diameter and guide rod of the location hole
The crest clearance of locating shaft cooperates；The connecting rod is coaxially arranged with inner hole open at one end, bore openings end position inside it
In connecting rod lower end and be connected with the axially extending bore A of piston；The arrival end of described its air inlet of cylinder seat passes through check-valves
It is connected to by pressure reducing valve with external circuit with the outlet end of external feed stream pipeline connection, cylinder seat gas vent.
3. a kind of large-scale precision impact test system according to claim 1, it is characterized in that: the boundary constraint device
Including moving left holding device and moving right holding device, the left side that platform long axis is arranged in holding device is moved left, is moved right
The right side of platform long axis is arranged in holding device, and long axial symmetry of the left and right mobile holding device about platform, described moves left
Holding device includes guide rail group, bottom plate, column, crossbeam, movable block, withstanding tight block and fixed block, and described its quantity of guide rail group is
Two, each guide rail group is made of the linear guide that a pair is parallel to platform short axle, and it is long that two guide rail groups are arranged at intervals on platform
The left side in direction is spent, is provided with fixed block, each guide rail on the experiment porch between two linear guides of each guide rail group
The top of group is provided with a bottom plate, and the bottom plate is removably connected by fixed block with platform, bottom plate bottom surface both side
Run in parallel linear guide by sliding block respectively, bottom plate upper surface perpendicular to the side of guide rail be arranged at intervals with perpendicular to
The column of bottom plate upper surface, the crossbeam be arranged in the top of two bottom plates and respectively with each column on two bottom plates
Upper end is connected, and is arranged with the movable block that can be moved on crossbeam long axis direction on the crossbeam between two adjacent columnss respectively, often
The withstanding tight block to hold out against test specimen is provided in the middle part of a movable block；The rectangular box of the movable block generally both ends open
Formula structure, the outer dimension of both ends open are matched with the outer dimension of crossbeam cross section, and the two sidewalls of movable block are symmetrical
It is provided with the pilot hole to install withstanding tight block；The withstanding tight block is made of positioning sleeve, standby tight nut and fastening bolt, described
Positioning sleeve generally cylindrical structure, be internally provided with tapped through hole, be provided in tapped through hole to hold out against test specimen
Fastening bolt, the both ends of positioning sleeve external cylindrical surface are respectively arranged with external screw thread and are mounted on movable block two by standby tight nut respectively
In the pilot hole of side wall；The cuboid frame structure of the crossbeam generally upper and lower opening, the two sides of length direction are symmetrical
It is provided with through slot, the center of the axis and movable block pilot hole of through slot length direction is contour；Its lower end surface of the fixed block with
Platform is connected, and the upper surface of fixed block is provided with uniformly distributed threaded hole according to rectangular array, and the bottom plate is by bolt and admittedly
Determine block to be connected；The bottom plate is additionally provided with the baffle to bear external drive between the adjacent column in end face thereon, described
Baffle lower end and bottom plate are connected, and both ends are connected with column respectively.
4. a kind of large-scale precision impact test system according to claim 1, it is characterized in that: its is whole for the track terrace
Body be the solid girder construction of built-in type steel, cross section be it is I-shaped, the upper surface of each track terrace is each parallel to horizontal plane
And it is contour with the upper surface of adjacent orbit terrace, track terrace is parallel to the long axis of cuboid B and its length is equal to cuboid B's
Length.
5. a kind of large-scale precision impact test system according to claim 1, it is characterized in that: the load bearing floor is pre-
The buried solid girder construction of steel, section be it is I-shaped, the upper surface of each load bearing floor each parallel to horizontal plane and with it is adjacent
The upper surface of load bearing floor is contour.
6. a kind of large-scale precision impact test system according to claim 1, it is characterized in that: the depth of the damping trough
Greater than the height of cuboid B.
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| CN111177952A (en) * | 2020-03-05 | 2020-05-19 | 沈阳理工大学 | Concrete foundation-soil contact surface rigidity and damping parameter identification device and method |
| CN115585960A (en) * | 2022-12-07 | 2023-01-10 | 山东福阳液压科技有限公司 | Hydraulic cylinder leakproofness testing arrangement |
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