CN210005205U

CN210005205U - large-scale precision impact test system

Info

Publication number: CN210005205U
Application number: CN201921159823.3U
Authority: CN
Inventors: 刘瑞朝; 孙桂娟; 高伟亮; 杨建超; 王幸; 周松柏; 卢志辉; 孙志杨
Original assignee: Institute of Engineering Protection National Defense Engineering Research Institute Academy of Military Sciences of PLA
Current assignee: Institute of Engineering Protection National Defense Engineering Research Institute Academy of Military Sciences of PLA
Priority date: 2019-07-23
Filing date: 2019-07-23
Publication date: 2020-01-31
Anticipated expiration: 2029-07-23

Abstract

The utility model relates to an large-scale accurate impact test system, including gas-liquid acceleration rate pneumatic cylinder, strikeing board, bracing truss, removal lift platform, damping buffer, boundary restraint device and ground basis, gas-liquid acceleration rate pneumatic cylinder set up on the bracing truss, the high-speed rod end of gas-liquid acceleration rate pneumatic cylinder is provided with the strikeing board that is used for impact test, the bracing truss setting on ground basis and form closed frame structure with ground basis, removal lift platform set up on ground basis and lie in the bracing truss below, damping buffer sets up at removal lift platform middle part, boundary restraint device symmetry sets up in removal lift platform up end both sides, is set up on damping buffer and presss from both sides tight location through boundary restraint device by the striking test piece, the utility model has the advantages of stable structure, can regard as the benchmark of research explosion impact to mark experiment platform, have good reproducibility, precision height, economy high efficiency.

Description

large-scale precision impact test system

Technical Field

The utility model relates to an impact test technique specifically is large-scale accurate impact test systems.

Background

The traditional explosion effect research means mainly depends on a field charging explosion test, but because a high-temperature detonation product is mixed with ambient air to generate combustion to form a fireball region during near region explosion, the measurement environment is very complicated and harsh due to strong electromagnetic radiation, a large number of charged particles, solid particles, fire light and high temperature generated by detonation of explosives, a sensor is extremely easy to damage, a measurement signal suffers serious interference, even a mechanical parameter signal is completely annihilated, and the repeatability of the measurement of the dynamic response mechanical parameter of a structural member is reduced to an unacceptable degree. Especially, under the influence of fire ball shielding, an optical measuring device cannot be used, a high-speed camera cannot shoot video signals of deformation and damage of the test piece in the area, and the deformation-damage occurrence and development change process of the test piece are the most important information data for analyzing the damage mode and mechanism of the test piece and further researching new reinforcement technology (new material, new component and reinforcement detail structure) and an anti-explosion design method.

The near-zone explosive load is characterized by high overpressure peak value and short action time, and the experience in foreign countries shows that a large-scale precision impact experiment system can generate such load waveforms. The method is characterized in that the method only depends on explosive explosion to develop damage effect research, and is not affordable by any country in the consumption of time and cost, a large-scale precision impact adopting a non-explosion method can be used for carrying out explosion simulation tests to generate vivid explosion-like pressure/impulse waveforms, the repeatability is good, effective data necessary for protection design and damage evaluation such as pressure, strain, displacement, acceleration and the like can be obtained in each test, the test period can be greatly shortened, a large amount of test research cost can be saved, particularly, a high-speed camera can be used for observing the deformation to damage process of a test piece from different angles to obtain image data of the whole process, and the method is very important basic data for the analysis of engineering structure deformation and damage mechanism and the reinforcement and damage evaluation research.

At present, explosive explosion tests in China are limited by conditions such as expenses and fields and can only be subjected to scale-down model tests, for example, the loading amount of prototype explosion tests of reinforced concrete members generally needs dozens of kg to hundreds of kg, even more than 1t, the energy actually acting on a test piece is only a small part of the equivalent explosion, most of the energy is transmitted to the surrounding environment in the form of explosion waves, and therefore, only scale-down model tests can be performed in consideration of safety and expenses, generally, the mean deviation of the data of the near-area explosion tests is more than +/-20%, and even +/-50% of dispersion and errors are not obvious, so that the method for calibrating and verifying numerical simulation by adopting the data of the near-area explosion tests is just cases without reliable accurate data.

At present, large-scale indoor precise experiment systems which apply similar conventional ammunition explosion wave load to a test piece by adopting a non-explosion method in a laboratory are mainly two, large-scale indoor precise experiment systems which use gravitational potential energy to realize low-speed impact, namely, drop hammer type impact testers, and large-scale indoor precise experiment systems are hydraulic servo drive explosion simulators.

At present, domestic high-speed hydraulic precision impact equipment capable of simulating near-zone explosion is basically blank, so that basic data for damage mechanism research is deficient, the damage effect is not prime, and the requirements on weapon damage effect and damage evaluation research under an informatization condition cannot be met.

Disclosure of Invention

To the not enough in the background art, the utility model aims at providing kinds of large-scale accurate impact test systems for single-point or multiple spot explosion impact test under the different explosion parameters of simulation.

In order to achieve the purpose, the utility model adopts the following technical scheme that large-scale precision impact test systems comprise a gas-liquid acceleration hydraulic cylinder, an impact plate, a supporting truss, a movable lifting platform, a damping buffer device, a boundary constraint device and a foundation base, wherein the whole test system uses at least sets of gas-liquid acceleration hydraulic cylinders as power sources to carry out impact load tests, the gas-liquid acceleration hydraulic cylinders are arranged on the supporting truss, the high-speed rod ends of the gas-liquid acceleration hydraulic cylinders are provided with the impact plate for impact tests, the supporting truss is arranged on the foundation base and forms a closed frame structure with the foundation base, the movable lifting platform is arranged on the foundation base and is positioned below the supporting truss, the damping buffer device is arranged in the middle of the movable lifting platform, the boundary constraint device is symmetrically arranged on two sides of the upper end surface of the movable lifting platform, and is arranged on the damping buffer device by impact test pieces and is clamped and positioned;

the foundation base comprises a base body made of reinforced concrete, the base body is arranged in a foundation pit, supporting earthwork is fixedly connected to two sides of the foundation pit, an artificial foundation is arranged at the bottom of the foundation pit and comprises a three-layer soil layer arranged on the soil layer, a sand shockproof layer arranged on the three-layer soil layer and a waterproof layer arranged on the sand shockproof layer, the base body is composed of a cuboid A and a cuboid B which are fixed to bodies, the length and the width of the cuboid A are smaller than those of the cuboid B, the cuboid A is positioned in the middle of the bottom surface of the cuboid B, the end surface of the cuboid A in the long axis direction is flush with the end surface of the cuboid B in the long axis direction, axial through grooves are arranged in the middle of the upper end surface of the cuboid B, force bearing terraces parallel to the long axis of the through grooves are arranged in the middle of the bottom wall of the through grooves at intervals, two ends of each force bearing terrace are flush with two ends of the long axis of the cuboid A respectively, damping grooves are arranged on two sides of the bottom wall of the through grooves parallel to the cuboid B, damping grooves are respectively flush with two ends of the cuboid A long axis of the rectangular terrace, damping grooves, the two ends of the damping grooves are arranged on two sides of the damping grooves, a steel plate, the same side walls of the damping grooves, and a steel plate, the floor;

the supporting truss comprises unit upright posts, system upright posts and cross beams, the unit upright posts are integrally of box-type columnar structures, the upper end surfaces of the two unit upright columns are respectively and fixedly connected with two ends of the bottom surface of the cross beam, the lower ends of the two unit upright columns are respectively and fixedly connected with pre-embedded connecting steel plates arranged on two sides of the upper end surface of the foundation, the system upright columns are equal in height to the unit upright columns, the system upright columns are also symmetrically arranged on two sides of the upper end surface of the foundation and are respectively fixedly connected with the unit upright columns on the same side, cross beams with zero space are arranged on the upper end surfaces of the two system upright columns in parallel, the lower ends of the two system upright columns are respectively fixedly connected with pre-embedded connecting steel plates arranged on two sides of the upper end surface of the foundation, the cross beams are integrally of a box-shaped beam structure, the width of the cross beam is equal to that of the unit upright, and mounting holes which are uniformly distributed and used for mounting the gas-liquid accelerating hydraulic cylinders are arranged in the middle of the cross beam and are vertical to the horizontal plane;

the movable lifting platform comprises a platform, load-bearing vehicles, synchronous lifting devices and parallel tracks, wherein the parallel tracks are fixedly connected with a track terrace of a foundation, the platform is integrally of a steel rectangular plate-shaped structure, connecting plates which are spaced and parallel are symmetrically arranged on two sides of the platform, each connecting plate is provided with a guide hole, the load-bearing vehicles are symmetrically arranged below the connecting plates on two sides of the platform and run on the tracks, two ends of each load-bearing vehicle are respectively connected with the two connecting plates on the same side of the platform through guide posts, two ends of each load-bearing vehicle are respectively provided with the synchronous lifting devices and control the lifting of the platform through the synchronous lifting devices, the load-bearing vehicles are formed by combining two vehicle bodies through connecting rods, the two vehicle bodies are respectively arranged below the two connecting plates on the same 362 side of the platform, the vehicle bodies are integrally of a cuboid structure, two ends of the lower parts of the vehicle bodies are respectively provided with track wheels, the middle parts of the upper end surfaces of the vehicle bodies are provided with through grooves perpendicular to the length direction of the vehicle bodies, the synchronous lifting devices are symmetrically provided with guide posts on the bottom walls of the through guide posts symmetrically arranged on the through guide posts on the corresponding platform, the guide posts on the connecting plates, the connecting rods, the connecting plates, the synchronous lifting devices are fixedly connected with the synchronous lifting devices on the front ends of the vehicle bodies through synchronous lifting cylinders of , the synchronous lifting devices, the motor cylinders, the synchronous lifting cylinders, the.

The damping buffer device comprises a cylinder body, a cylinder seat, a cylinder cover, a piston, a connecting rod, a bearing plate, a buffer block and a guide rod, wherein the cylinder seat is fixedly connected with a platform through bolts, the lower end of the cylinder body is fixedly arranged on the cylinder seat and is in sealed connection with the cylinder seat, the cylinder cover is fixedly arranged at the upper end of the cylinder body and is in sealed connection with the cylinder body, the piston is arranged in the cylinder body and is in sliding sealed fit with the cylinder body, an air inlet hole and an air outlet hole which are communicated with the inside of the cylinder body are respectively arranged on the cylinder seat, a coaxial axial through hole A is arranged in the middle of the piston, a uniformly distributed axial through hole C is arranged by taking the through hole A as the center, a guide rod is arranged in each axial through hole C, the lower end of the guide rod is arranged on the cylinder seat, the upper end of the guide rod is arranged on the cylinder cover and is tightly pressed and fixed through the cylinder cover, a spring is sleeved between the lower end of the guide rod and the piston, the connecting rod is arranged in the middle of the cylinder cover and is in sliding sealed fit with the cylinder cover, the lower end of the connecting rod and is fixedly , the piston, the connecting rod, the upper end of the connecting rod is fixedly connected with the bearing plate, the bearing plate is provided with a buffer block, the bearing plate, the guide rod is arranged on the bearing plate, the guide rod is integrally of the bearing plate, the guide rod is integrally formed by high-axis, the guide rod is arranged in a high-shaft, the cylinder seat, the guide rod is arranged on the guide rod, the cylinder seat, the guide rod is arranged on the guide rod, the cylinder seat, the guide rod is arranged on the.

The test platform comprises a test platform body, a test piece, a boundary restraining device, a left moving jacking device, a right moving jacking device, two guide rail groups, a transverse beam, a moving block, a jacking block and fixed blocks, wherein the left moving jacking device is arranged on the left side of a long shaft of the platform, the right moving jacking device is arranged on the right side of the long shaft of the platform, the left moving jacking device and the right moving jacking device are symmetrical about the long shaft of the platform, the left moving jacking device comprises two guide rail groups, two guide rail groups are composed of pairs of linear guide rails parallel to a short shaft of the platform, the two guide rail groups are arranged on the left side of the length direction of the platform at intervals, fixed blocks are arranged on the test platform between two linear guide rails of each guide rail group, bottom plates are arranged above each guide rail group, the bottom plates are detachably and fixedly connected with the platform body through the fixed blocks, two sides of the bottom plates run on the parallel linear guide rails through sliding blocks, rectangular upright posts perpendicular to the sides of the bottom plates at intervals and perpendicular to the upper end faces of the test piece are arranged on two side walls of the rectangular upright blocks, transverse blocks are arranged on two side walls of the rectangular upright blocks, the rectangular upright blocks are fixedly connected with the upright blocks, the upright blocks are fixedly connected with the upright blocks, the rectangular upright blocks, the upright blocks are fixedly connected with the upright blocks, the rectangular upright blocks, the rectangular upright blocks, the upright.

Its whole pre-buried formula steel solid beam structure that is of track terrace, its cross section is the I shape, the up end of every track terrace all is on a parallel with the horizontal plane and is as high as the up end of adjacent track terrace, the track terrace is on a parallel with cuboid B's major axis and its length equals cuboid B's length.

The bearing terrace is of a pre-embedded steel solid beam structure, the cross section of the bearing terrace is I-shaped, and the upper end face of each bearing terrace is parallel to the horizontal plane and is as high as the upper end face of the adjacent bearing terrace.

The depth of the shock absorption groove is greater than the height of the cuboid B.

The basic principle of the utility model is that a plurality of impact modules are pushed by a plurality of high-speed gas-liquid drivers, the front end of the piston rod of each set of high-speed gas-liquid driver is connected with impact modules, when the impact modules are accelerated to constant speed (the speed of each set of impact modules can be the same or different), the impact modules simultaneously impact a full scale model of a structure/component, and the specific impulse acting on the full scale component is the same as the specific impulse acting on the structure component by adjusting the structure and the quality of the impact modules and controlling the impact speed of the impact modules, so that the damage effect of the conventional ammunition explosion on the structure/component is realistically simulated.

The utility model has the advantages that: the utility model discloses a gas-liquid acceleration rate pneumatic cylinder of latest research and development is as the driving source, through the structural design who adds up, and whole test system has stable structure, can regard as the benchmark of research explosion impact to mark the experiment platform, has advantages such as good reproducibility, high precision, economy high efficiency, can provide sufficient accurate experimental data, provides to verify and mark for the relevant research means (like numerical simulation) of explosion impact dynamics research.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a top view of the present invention.

Fig. 3 is a front view of the present invention.

Fig. 4 is a side view of the present invention.

Fig. 5 is a schematic view of a foundation infrastructure.

Fig. 6 is a perspective view of the base body.

Fig. 7 is a front view of the base body.

Fig. 8 is a schematic view of the mobile lift platform.

Fig. 9 is a front view of the mobile lift platform.

Fig. 10 is a schematic view of a damping bumper.

FIG. 11 is a schematic view of a piston in the damping bumper.

Fig. 12 is a schematic view of a boundary constraint device.

Fig. 13 is a schematic view of a moving block in the boundary constraining apparatus.

Fig. 14 is a schematic view of a holding-down block in the boundary constraint device.

In the figure, 1, a track, 2, a platform, 201, a connecting plate, 202, a guide hole, 301, a vehicle body, 302, a connecting rod, 303, a synchronous motor, 304, a track wheel, 305, a speed reducing mechanism, 306, a wheel shaft, 4, a synchronous oil cylinder, 401 and an oil cylinder seat,

5. damping buffer device 501, cylinder body 502, cylinder seat 503, cylinder cover 504, piston 505, connecting rod 506, bearing plate 507, buffer block 508, guide rod 509, air inlet hole 510, exhaust hole 541, axial through hole A, 542, axial through hole C, 581, step shaft, 582, second step shaft 583, transition portion 584, positioning shaft 585 and spring,

601. a bottom plate, 602, upright posts, 603, cross beams, 604, moving blocks, 605, jacking blocks, 606, fixing blocks, 608, linear guide rails, 609, baffles, 651, positioning sleeves, 652, tightening nuts, 653 and fastening bolts,

7. a foundation body 701, cuboids A and 702, cuboids B and 703, through grooves 3 and 704, a force bearing terrace 705, a damping groove 706, a track terrace 707, a connecting steel plate 708, a pile foundation 709, a waterproof layer 710, a sand shockproof layer 711 and a three-layer soil layer,

8. a gas-liquid speed-increasing hydraulic cylinder,

901. unit column, 902, system column, 903 and system beam.

10. Guide post, 11, impact plate.

Detailed Description

The present invention will be described in further detail in with reference to the accompanying drawings.

As shown in fig. 1, 2, 3 and 4, large-scale precision impact test systems comprise a gas-liquid accelerating hydraulic cylinder 8, an impact plate 11, a supporting truss, a movable lifting platform, a damping buffer device 5, a boundary constraint device and a foundation base, wherein the whole test system is used for carrying out an impact load test by using at least sets of gas-liquid accelerating hydraulic cylinders 8 as a power source, the gas-liquid accelerating hydraulic cylinders 8 are arranged on the supporting truss 9, the impact plate 11 for the impact test is arranged at the high-speed rod ends of the gas-liquid accelerating hydraulic cylinders 8, the supporting truss 9 is arranged on the foundation base and forms a closed frame structure with the foundation base, the movable lifting platform is arranged on the foundation base and is positioned below the supporting truss 9, the damping buffer device 5 is arranged in the middle of the movable lifting platform, the boundary constraint devices are symmetrically arranged on two sides of the upper end face of the movable lifting platform, and an impacted test piece is arranged on the damping buffer device 5 and is clamped;

the foundation base comprises a base body 7 made of reinforced concrete, the base body 7 is arranged in a foundation pit, supporting earthwork is fixedly connected to two sides of the foundation pit, an artificial foundation is arranged at the bottom of the foundation pit and comprises a three-layer soil layer 711 arranged on the soil layer, a sand shockproof layer 710 arranged on the three-layer soil layer 711 and a waterproof layer 709 arranged on the sand shockproof layer 710, the base body 7 is composed of a cuboid A701 and a cuboid B702 which are fixedly bodies, the length and the width of the cuboid A701 are smaller than those of the cuboid B702, the cuboid A701 is positioned in the middle of the bottom surface of the cuboid B702, the end face of in the long axis direction of the cuboid A701 is flush with the end face of in the long axis direction of the cuboid B702, an axial through groove 703 is arranged in the middle of the upper end face of the cuboid B702, bearing terrace 704 parallel to the long axis 705 is arranged at the middle of the bottom wall of the through groove 703 at intervals, two ends of each bearing terrace 704 are flush with two ends of the long axis 705 of the cuboid A701 in the long axis direction of the cuboid B701, two ends of each bearing terrace 704 are respectively flush with two ends of a high-grade truss 706 of the bearing terrace track 706, the same side walls of the bearing terrace 703, the floor truss, the floor 703 are connected with the same side of the bearing steel plate 706, the bearing track 706, the bearing terrace 702, the floor truss, the bearing track 706, the bearing track is arranged in the same side wall of the bearing terrace 702;

the supporting truss comprises unit upright columns 901, system upright columns 902 and system cross beams 903, wherein the unit upright columns 901 are integrally of a box-type columnar structure and symmetrically arranged on two sides of the upper end surface of a foundation 7, the upper end surfaces of the two unit upright columns 901 are fixedly connected with two ends of the bottom surface of the system cross beam respectively, the lower ends of the two unit upright columns 901 are fixedly connected with pre-embedded connecting steel plates 707 arranged on two sides of the upper end surface of the foundation 7 respectively, the system upright columns 902 are equal to the unit upright columns 901 in height, the system upright columns 902 are also symmetrically arranged on two sides of the upper end surface of the foundation 7 and are fixedly connected with the unit upright columns 901 on the same side respectively, the upper end surfaces of the two system upright columns 902 are provided with system cross beams 903 with zero spacing in parallel, the lower ends of the two system upright columns 902 are fixedly connected with the pre-embedded connecting steel plates 707 arranged on two sides of the upper end surface, the width of the system beam 903 is equal to that of the unit upright column 901, and mounting holes which are uniformly distributed and used for mounting the gas-liquid accelerating hydraulic cylinders 8 are arranged in the middle of the system beam 903 and are vertical to the horizontal plane;

the movable lifting platform comprises a platform 2, a bearing vehicle, synchronous lifting devices and parallel rails 1, wherein the parallel rails 1 are fixedly connected with a rail terrace 706 of a foundation, the platform 2 is integrally of a steel rectangular plate-shaped structure, connecting plates 201 which are parallel at intervals are symmetrically arranged on two sides of the platform 2, each connecting plate 201 is provided with a guide hole 202, the bearing vehicle is symmetrically arranged below the connecting plates 201 on two sides of the platform 2 and runs on the rails 1, two ends of each bearing vehicle are respectively connected with the two connecting plates 201 on the same side of the platform 2 through guide posts 10, two ends of each bearing vehicle are respectively provided with the synchronous lifting devices and control the lifting of the platform 2 through the synchronous lifting devices, the bearing vehicle is formed by combining two vehicle bodies 301 through connecting rods 302, two vehicle body through grooves 301 are respectively arranged below the two connecting plates 201 on the same 362 side of the platform, the vehicle bodies 301 are integrally of a cuboid structure, two ends of the lower part of the vehicle bodies 301 are respectively provided with rail wheels 304, the middle part of the upper end surface of the vehicle body 301 is provided with a through groove 301 which is vertical to the length direction of the vehicle body 301, the bottom wall of the synchronous lifting device is provided with a synchronous lifting device, the lifting device is provided with a motor 301, the synchronous lifting device, the synchronous lifting.

The damping buffer device comprises a cylinder body 501, a cylinder seat 502, a cylinder cover 503, a piston 504, a connecting rod 505, a bearing plate 506, a buffer block 507 and a guide rod 508, wherein the cylinder seat 502 is fixedly connected with a platform 2 through bolts, the lower end of the cylinder body 501 is fixedly arranged on the cylinder seat 502 and is in sealing connection with the cylinder seat 502, the cylinder cover 503 is fixedly arranged at the upper end of the cylinder body 501 and is in sealing connection with the cylinder body 501, the piston 504 is arranged in the cylinder body 501 and is in sliding sealing fit with the cylinder body 501, an air inlet 509 and an air outlet 510 which are communicated with the inside of the cylinder body 501 are respectively arranged on the cylinder seat 502, a coaxial axial through hole 541A is arranged in the middle of the piston 504, a uniformly distributed axial through hole C542 is arranged by taking the through hole A541 as the center, a guide rod 508 is arranged in each axial through hole C541A, the lower end of the guide rod 508 is arranged on the cylinder seat, the upper end of the guide rod 508 is arranged on the cylinder cover 503 and is tightly pressed and fixed by the cylinder cover 503, a spring 585 is sleeved between the lower end of the piston 504 and the piston 504, the connecting rod 505 and the piston 504, the connecting rod 505 is arranged in sliding sealing fit with a second through a through hole 353, the axial through a guide rod 35500, the guide rod equivalent to the axial through hole 582 of a second stepped shaft 510, the second axial through hole 35500, the second stepped shaft 510, the second axial through hole 35500A 35A which is fixedly arranged on the second stepped shaft 500, the second stepped shaft 500, the second shaft 500 is fixedly arranged on the second shaft 500, the second shaft 510, the second shaft 500 is fixedly arranged in the second shaft 500, the second shaft 500 is fixedly arranged in the second shaft 500, the second shaft 510, the second shaft 500 is fixedly arranged in the second shaft 500, the second shaft 500, the second shaft 510, the second shaft is fixedly arranged in the second shaft 500, the second shaft 500 is fixedly arranged in the second shaft, the.

The boundary restraining device comprises a left moving jacking device and a right moving jacking device, the left moving jacking device is arranged on the left side of a long shaft of a platform, the right moving jacking devices are arranged on the right side of the long shaft of the platform, the left and right moving jacking devices are symmetrical about the long shaft of the platform 2, the left moving jacking device comprises two guide rail sets, a bottom plate 601, vertical columns 602, cross beams 603, moving blocks 604, jacking blocks 605 and fixing blocks 606, the number of the guide rail sets is two, each guide rail set comprises pairs of linear guide rails 608 parallel to a short shaft of the platform, the two guide rail sets are arranged on the left side of the length direction of the platform 2 at intervals, fixing blocks 606 are arranged on the platform 2 between the two linear guide rails 608 of each guide rail set, bottom plates 601 are arranged above each guide rail set, the bottom plates 601 are detachably and fixedly connected with the platform 2 through the fixing blocks 606, two sides of the bottom surfaces of the bottom plates 601 run on parallel linear guide rails through screw caps 609 respectively arranged on the rectangular guide rail sets of the rectangular guide rail sets, the bottom plates 603, the bottom plates are fixedly connected with the rectangular guide rail sets of the fixing blocks 602 through screw caps of the fixing blocks, the fixing blocks are arranged on the fixing blocks, the fixing blocks are arranged on the bottom plates 603, the fixing blocks are arranged on the fixing blocks.

Its whole formula steel solid beam structure of pre-buried formula that is of track terrace 706, its cross section is the I shape, the up end of every track terrace 706 all is on a parallel with the horizontal plane and is as high as the up end of adjacent track terrace 704, track terrace 706 is on a parallel with the major axis of cuboid B702 and its length equals the length of cuboid B702.

The bearing terrace 704 is a pre-buried steel solid beam structure, the cross section of the bearing terrace 704 is I-shaped, and the upper end face of each bearing terrace 704 is parallel to the horizontal plane and is as high as the upper end face of the adjacent bearing terrace 704.

The depth of the shock absorbing groove 705 is larger than the height of the cuboid B702.

The gas-liquid speed-increasing hydraulic cylinder used in the utility model is shown in CN201910064612. X.

The utility model discloses a use method, remove the mounting platform initial position and be located the outside of support truss below ends, place the test piece on the damping buffer of removing the mounting platform through hoisting equipment, carry out spacing fixed to the test piece through boundary restraint device, the test position of redriving removal mounting platform entering support truss below, the last elevating gear whereabouts of removal mounting platform, make the platform bottom surface of removing the mounting platform contact with the load terrace on the ground, start gas-liquid acceleration rate pneumatic cylinder, the impact plate is under the drive of gas-liquid acceleration rate pneumatic cylinder, high-speed striking test piece, accomplish impact test.

In whole test system's structure, the unit stand to the supporting truss carries out the isolated design in order to carry out the unit test of earlier stage, and its effect is through experimental data, provides the aassessment to the holistic structure of system, after satisfying the condition, merges with the system stand again and uses, and the damage appears in the system stand when avoiding normal test.

The part of the utility model not detailed is prior art.

Claims

The large-scale precision impact test system is characterized by comprising a gas-liquid accelerating hydraulic cylinder, an impact plate, a supporting truss, a movable lifting platform, a damping buffer device, a boundary constraint device and a foundation base, wherein the whole test system uses at least sets of gas-liquid accelerating hydraulic cylinders as power sources to carry out impact load tests, the gas-liquid accelerating hydraulic cylinders are arranged on the supporting truss, the high-speed rod ends of the gas-liquid accelerating hydraulic cylinders are provided with the impact plate for the impact tests, the supporting truss is arranged on the foundation base and forms a closed frame structure with the foundation base, the movable lifting platform is arranged on the foundation base and is positioned below the supporting truss, the damping buffer device is arranged in the middle of the movable lifting platform, the boundary constraint device is symmetrically arranged on two sides of the upper end face of the movable lifting platform, and impacted test pieces are arranged on the damping buffer device and are clamped and positioned through the boundary;

the foundation base comprises a base body made of reinforced concrete, the base body is arranged in a foundation pit, supporting earthwork is fixedly connected to two sides of the foundation pit, an artificial foundation is arranged at the bottom of the foundation pit and comprises a three-layer soil layer arranged on the soil layer, a sand shockproof layer arranged on the three-layer soil layer and a waterproof layer arranged on the sand shockproof layer, the base body is composed of a cuboid A and a cuboid B which are fixed to bodies, the length and the width of the cuboid A are smaller than those of the cuboid B, the cuboid A is positioned in the middle of the bottom surface of the cuboid B, the end surface of the cuboid A in the long axis direction is flush with the end surface of the cuboid B in the long axis direction, axial through grooves are arranged in the middle of the upper end surface of the cuboid B, force bearing terraces parallel to the long axis of the through grooves are arranged in the middle of the bottom wall of the through grooves at intervals, two ends of each force bearing terrace are flush with two ends of the long axis of the cuboid A respectively, damping grooves are arranged on two sides of the bottom wall of the through grooves parallel to the cuboid B, damping grooves are respectively flush with two ends of the cuboid A long axis of the rectangular terrace, damping grooves, the two ends of the damping grooves are arranged on two sides of the damping grooves, a steel plate, the same side walls of the damping grooves, and a steel plate, the floor;

the supporting truss comprises unit upright posts, system upright posts and cross beams, the unit upright posts are integrally of box-type columnar structures, the upper end surfaces of the two unit upright columns are respectively and fixedly connected with two ends of the bottom surface of the cross beam, the lower ends of the two unit upright columns are respectively and fixedly connected with pre-embedded connecting steel plates arranged on two sides of the upper end surface of the foundation, the system upright columns are equal in height to the unit upright columns, the system upright columns are also symmetrically arranged on two sides of the upper end surface of the foundation and are respectively fixedly connected with the unit upright columns on the same side, cross beams with zero space are arranged on the upper end surfaces of the two system upright columns in parallel, the lower ends of the two system upright columns are respectively fixedly connected with pre-embedded connecting steel plates arranged on two sides of the upper end surface of the foundation, the cross beams are integrally of a box-shaped beam structure, the width of the cross beam is equal to that of the unit upright, and mounting holes which are uniformly distributed and used for mounting the gas-liquid accelerating hydraulic cylinders are arranged in the middle of the cross beam and are vertical to the horizontal plane;

the movable lifting platform comprises a platform, load-bearing vehicles, synchronous lifting devices and parallel tracks, wherein the parallel tracks are fixedly connected with a track terrace of a foundation, the platform is integrally of a steel rectangular plate-shaped structure, connecting plates which are spaced and parallel are symmetrically arranged on two sides of the platform, each connecting plate is provided with a guide hole, the load-bearing vehicles are symmetrically arranged below the connecting plates on two sides of the platform and run on the tracks, two ends of each load-bearing vehicle are respectively connected with the two connecting plates on the same side of the platform through guide posts, two ends of each load-bearing vehicle are respectively provided with the synchronous lifting devices and control the lifting of the platform through the synchronous lifting devices, the load-bearing vehicles are formed by combining two vehicle bodies through connecting rods, the two vehicle bodies are respectively arranged below the two connecting plates on the same 362 side of the platform, the vehicle bodies are integrally of a cuboid structure, two ends of the lower parts of the vehicle bodies are respectively provided with track wheels, the middle parts of the upper end surfaces of the vehicle bodies are provided with through grooves perpendicular to the length direction of the vehicle bodies, the synchronous lifting devices are symmetrically provided with guide posts on the bottom walls of the through guide posts symmetrically arranged on the through guide posts on the corresponding platform, the guide posts on the connecting plates, the connecting rods, the connecting plates, the synchronous lifting devices are fixedly connected with the synchronous lifting devices on the front ends of the vehicle bodies through synchronous lifting cylinders of , the synchronous lifting devices, the motor cylinders, the synchronous lifting cylinders, the.
2. The large-scale precision impact test system according to claim 1 is characterized in that the damping buffer device is composed of a cylinder body, a cylinder seat, a cylinder cover, a piston, a connecting rod, a bearing plate, a buffer block and a guide rod, the cylinder seat is fixedly connected with a platform through a bolt, the lower end of the cylinder body is fixedly arranged on the cylinder seat and is in sealing connection with the cylinder seat, the cylinder cover is fixedly arranged at the upper end of the cylinder body and is in sealing connection with the cylinder body, the piston is arranged in the cylinder body and is in sliding sealing fit with the cylinder body, an air inlet hole and an air outlet hole which are communicated with the interior of the cylinder body are respectively arranged on the cylinder seat, a coaxial axial through hole A is formed in the middle of the piston, a uniformly distributed axial through hole C is formed by taking the through hole A as the center, a guide rod is arranged in each axial through hole C, the lower end of the guide rod is arranged on the cylinder seat, the upper end of the guide rod is arranged on a cylinder cover and is tightly pressed and fixed through the cylinder cover, a spring is sleeved between the lower end of the guide rod and the piston, the connecting rod and is arranged in the middle of the cylinder cover and is in sliding sealing fit with the cylinder cover, the piston, the lower end of the connecting rod is fixedly , the bearing plate is fixedly arranged on the bearing plate, the bearing plate is integrally made of the guide rod, the shaft, the guide rod is made of a high-strength shaft, the axial through hole of the connecting rod is made of the second shaft, the second shaft is arranged on the transition shaft, the axial through hole of the second shaft, the second shaft is arranged on the second shaft.
3. The large-scale precision impact test system according to claim 1, wherein the boundary constraining device comprises a left moving tightening device and a right moving tightening device, the left moving tightening device is arranged on the left side of a long axis of the platform, the right moving tightening device is arranged on the right side of the long axis of the platform, the left moving tightening device and the right moving tightening device are symmetrical about the long axis of the platform, the left moving tightening device comprises two guide rail sets, a bottom plate, columns, beams, moving blocks, tightening blocks and fixing blocks, the number of the guide rail sets is two, each guide rail set comprises pairs of linear guide rails parallel to a short axis of the platform, the two guide rail sets are arranged on the left side of the length direction of the platform at intervals, fixing blocks are arranged on an experimental platform between two linear guide rails of each guide rail set, bottom plates are detachably fixed to the platform through the fixing blocks, two sides of the bottom surfaces of the bottom plates run on parallel linear guide rails through nuts respectively passing through a sliding block fastening through a rectangular screw nut fastening through a through hole in the middle of the tightening block fastening through hole of the rectangular tightening block, the fixing block is arranged on two rectangular bottom plate, the rectangular fixing block fastening through a screw nut fastening through hole in the rectangular column, the rectangular through hole, the rectangular nut fastening through a rectangular nut fastening through hole, a rectangular nut fastening through which is arranged on the rectangular nut fastening through a rectangular nut fastening through hole, a rectangular nut fastening through hole in the rectangular nut fastening through which is arranged on the rectangular nut fastening block, a rectangular nut fastening through hole, a rectangular nut fastening through which is arranged on the rectangular nut fastening through a rectangular nut fastening through hole, a rectangular nut fastening block, a rectangular nut fastening through hole, a rectangular.
4. The large-scale precision impact test system of claim 1, wherein the rail terraces are of pre-embedded steel solid beam structure, the cross section of the rail terraces is I-shaped, the upper end face of each rail terrace is parallel to the horizontal plane and is as high as the upper end face of the adjacent rail terrace, the rail terraces are parallel to the long axis of the cuboid B, and the length of the rail terraces is equal to the length of the cuboid B.
5. The large-scale precision impact test system of claim 1, wherein the force-bearing terraces are pre-embedded steel solid beam structures with I-shaped cross-sections, and the upper end face of each force-bearing terrace is parallel to the horizontal plane and is as high as the upper end face of the adjacent force-bearing terrace.
6. The kinds of large-scale precision impact test system according to claim 1, wherein the depth of the shock absorbing groove is greater than the height of the cuboid B.