CN210198860U - Dynamic and static combined loading test device - Google Patents
Dynamic and static combined loading test device Download PDFInfo
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- CN210198860U CN210198860U CN201920846124.XU CN201920846124U CN210198860U CN 210198860 U CN210198860 U CN 210198860U CN 201920846124 U CN201920846124 U CN 201920846124U CN 210198860 U CN210198860 U CN 210198860U
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Abstract
The utility model relates to an explosion mechanics and geotechnical engineering indoor model test technique provides a loaded test device of sound combination. The dynamic and static combined loading test device is provided with an explosive dynamic load loading mechanism and a three-way static load loading mechanism; a base of the three-way static load loading mechanism is provided with a static load bearing ring; two symmetrically arranged X-direction jacks and two symmetrically arranged Y-direction jacks are arranged in the static load bearing ring; the X-direction jack and the Y-direction jack are tightly propped against the test piece through the static load loading plate; the bottom of the test piece is supported by a Z-direction positioning plate, and the Z-direction positioning plate is connected to a Z-direction jack; the top of the test piece is propped against one end of the dynamic load transmission piston; the other end of the dynamic load force transmission piston is connected with a dynamic load cavity force transmission plate; an explosion source is arranged in the dynamic load cavity barrel; the explosion source is suspended right above the dynamic load cavity force transmission plate through an explosion source firing cable. The utility model discloses the test principle is directly perceived, the load state simulation is accurate, dismantle convenient, easily operation.
Description
Technical Field
The utility model relates to an explosion mechanics and geotechnical engineering indoor model test technique especially relates to a loaded test device of sound combination.
Background
The combined action of dynamic load and static load is frequently encountered in the structural stability and safety analysis of geotechnical engineering, particularly deep underground engineering and large-span underground engineering; the dynamic load mainly refers to an explosion phenomenon generated under the conditions of blasting excavation, accidental explosion or weapon striking and the like and acts on an engineering structure, and comprises air shock waves, ground shock, explosion strong vibration and the like, and has the remarkable characteristics of high peak strength, short loading duration, large load change and strong instantaneous action; the static load mainly refers to the load generated by the distribution of rock and soil mass, the action of geological structure, and the like, including ground stress, tectonic stress, and the like, and is characterized by stable load strength, long action time, obvious long-term effect, and the like. Generally, the inside of the rock-soil body is a relatively stable static load environment; when engineering construction is carried out in a rock-soil body, strong disturbance is inevitably generated on the rock-soil body, and a relatively stable environment is destroyed, so that the effect of static load on engineering is changed in a complex way, which is a hotspot of current engineering field research; in the construction stage of geotechnical engineering, especially blasting excavation construction in hard rock masses, the redistribution and the direction of static load are obviously influenced; in addition, in the construction and operation stages of geotechnical engineering, especially for important underground engineering, the underground engineering may suffer from the action of strong dynamic load such as accidental explosion or weapon striking, and the influence of the unpredictable explosion dynamic load is stronger than the controllable explosion action; under the combined action of the dynamic load and the static load of the explosion, the performance requirements of the geotechnical engineering structure are greatly influenced, so that the performance research of the geotechnical body and the engineering structure under the combined action of the dynamic load and the static load is important work in the fields of explosion mechanics and geotechnical engineering. At present, the research on the response characteristics of the rock-soil body and the engineering structure under the combined action of dynamic load and static load is not much.
Under the action of dynamic load, especially explosion strong dynamic load, the mechanical behavior of the rock-soil body and the engineering structure is greatly changed, and the situation is greatly different from that under the action of independent static load. Early in europe, germany, law, etc., the load rate, otherwise known as stress rate, was used for measurement, while the strain rate was mainly used in the united states as a measurement parameter. At present, strain rates are basically and uniformly adopted by various countries as basic parameters for representing the change rule of dynamic mechanical behaviors of rock-soil bodies and engineering structures. In recent years, a large number of dynamic mechanical parameter tests on geotechnical bodies and engineering structures are performed by researchers at home and abroad, but the results are quite different, and the difference is mainly caused by different test methods and devices adopted by the researchers. Therefore, the principle and scope of the various testing methods and devices commonly used at present need to be clearly understood.
In the static load test research, the test is mainly single-axis and three-axis tests at present, main test equipment comprises an MTS series rock three-axis servo rigidity testing machine USA, an INSTRON series electro-hydraulic servo test system UK, a three-axis loading model test device China, a tension and compression true triaxial apparatus and the like, the equipment can well perform single-axis and three-axis tests on rock and soil mass or rock and soil mass simulation materials, and can measure the whole process curves of axial load, axial deformation, transverse deformation, volume deformation and the like. Researchers have carried out three-way pulling and pressing static tests under various stress ratios, pulling and pressing combined action static tests, material fatigue performance under cyclic load and the like. The current static load test research theory and equipment reach the level of equivalent system perfection, but the static load test equipment can not carry out dynamic performance research.
In the dynamic load test research, equipment such as a vibration table, a resonance column or a dynamic triaxial apparatus is mostly adopted at present to perform field seismic reaction analysis, dynamic interaction analysis of a soil-pile-structure system, dynamic characteristics and dynamic parameter analysis of a soil body and the like, and the dynamic load test is mainly based on relevant research developed by seismic dynamic load. In the research of dynamic explosive load, high strain rate loading is usually required for simulating dynamic explosive load, and devices such as a light gas gun, a Hopkinson pressure bar test device SHPB or an explosive plane wave generator are generally adopted; the dynamic constitutive relation of a medium is researched by mainly utilizing the stress wave propagation characteristic formed by high-speed impact generated by a high-pressure gas driving bullet launching rod of a light gas gun and an SHPB device, and the explosive plane wave generator is used for researching the explosive dynamic load by directly utilizing the explosive explosion effect in the device. At home and abroad, a plurality of research institutions develop and build test devices with different indexes, such as light gas guns, SHPB (split shaft press) and the like, and researchers successively perform researches on the concrete strength deformation characteristic and dynamic tension test under dynamic load, the concrete dynamic performance and dynamic strength under impact load and the like. The technology for independently developing the dynamic test research is mature, and although the research for directly developing the dynamic test by using explosive explosion is more limited in the aspect of explosion safety, the research for developing the explosion effect and the related test technology through a stress wave propagation theory becomes a relatively accepted research means for the dynamic mechanics of materials. At present, on the basis of an SHPB device, SHPB test equipment with confining pressure is formed through improvement, a material dynamic mechanical test method based on a drop hammer test method is also provided in China, and the dynamic mechanical property test research of the material under a certain static load condition can be carried out, but the methods have two defects, one is that the dynamic load source is not explosive explosion, so that the action process of explosion forced dynamic load cannot be truly reflected; secondly, although static load is applied, the static load loading mode is single, and the real static and dynamic load environment cannot be reflected.
In addition to experimental research, with the development of computer simulation technology, the mechanical property research of the rock-soil body and the engineering structure under the combined action of dynamic load and static load is developed by using large commercial software, such as finite element ANSYS, finite difference method FLAC3D, discrete elements, boundary elements and the like, and the method is also a very feasible and increasingly widely applied means. However, the numerical simulation research is only a simulation deduction method, and cannot obtain the visual phenomenon and result presented in the test, and the conclusion of the numerical simulation research needs to be further judged.
SUMMERY OF THE UTILITY MODEL
In order to overcome the shortcomings and deficiencies of the prior static load test, dynamic load test and dynamic test methods under certain static load condition, the utility model aims to provide a dynamic and static combination loading test device.
The utility model adopts the following technical scheme for accomplishing the above purpose:
a dynamic and static combined loading test device is provided with an explosive dynamic load loading mechanism and a three-way static load loading mechanism; the three-way dead load loading mechanism is provided with a base; a static load bearing ring is arranged right above the base; the static load bearing ring is supported on the base through a lower support column; two symmetrically arranged X-direction jacks and two symmetrically arranged Y-direction jacks are arranged in the static load bearing ring; the two X-direction jacks and the two Y-direction jacks are positioned in the same plane and are mutually vertical; the bottoms of the X-direction jack and the Y-direction jack are fixed on the inner wall surface of the static load bearing ring, and the heads of the X-direction jack and the Y-direction jack are connected with the static load loading plate; the static load loading plate is tightly propped against the test piece, and the X, Y applies static load in the X, Y direction to the test piece to the jack; the bottom of the test piece is supported by a Z-direction positioning plate, the Z-direction positioning plate is connected to a Z-direction jack, and the Z-direction jack is fixed on the base; the top of the test piece is abutted against one end of a dynamic load force transmission piston, the side limit of the dynamic load force transmission piston is abutted against a dynamic load cavity bottom plate, and the dynamic load cavity bottom plate is connected to the static load bearing ring through an upper support column and an upper support column flange; the Z-direction jack, the base, the lower support column, the static load bearing ring, the upper support column, the dynamic load cavity bottom plate and the dynamic load force transmission piston jointly form a Z-direction loading counterforce system for carrying out Z-direction static load loading on the test piece; the X, Y directional jack and the Z-directional loading counterforce system jointly form a static load loading mechanism for carrying out three-directional loading on the test piece; the other end of the dynamic load force transmission piston is connected with a dynamic load cavity force transmission plate positioned in the dynamic load cavity barrel; the dynamic load cavity cylinder is of a cylinder structure with openings at two ends; the lower end of the dynamic load cavity barrel is closed by a dynamic load cavity bottom plate; the dynamic load cavity bottom plate is supported on the upper end surface of the static load bearing ring through an upper support column; an explosion source is arranged in the dynamic load cavity barrel; the explosion source is suspended right above the dynamic load cavity dowel plate through an explosion source firing cable; the upper end of the dynamic load cavity cylinder is connected with the dynamic load cavity upper cover; the dynamic load cavity upper cover, the dynamic load cavity bottom plate and the dynamic load cavity barrel together form an explosion cavity, a medium is filled in the explosion cavity, the explosion action in the medium is finally loaded on the test piece through the transmission of the dynamic load cavity force transmission plate and the dynamic load force transmission piston, and the explosion dynamic load of the test piece is formed.
The static load loading plate is connected to X, Y and is arranged at the front end of the jack, after X, Y applies force to the jack, the end part of the static load loading plate is tightly propped against the side face of the test piece through the static load loading plate, X, Y are uniformly distributed and fixed on the static load bearing ring towards the bottom of the jack, and the static load bearing ring, the jack, the static load loading plate and the test piece form a X, Y-direction static load loading system.
The top end of the Z-direction jack is connected with the Z-direction positioning plate, the Z-direction positioning plate supports the bottom of a test piece, the bottom of the Z-direction jack is fixed on a base, the base is sequentially connected with a lower support column, a static load bearing ring, an upper support column, a dynamic load cavity bottom plate and a dynamic load force transmission piston, and the dynamic load force transmission piston is downwards propped against the top of the test piece; after the Z-direction jack exerts force, the Z-direction jack, the Z-direction positioning plate, the test piece, the base, the lower support column, the static load bearing ring, the upper support column, the dynamic load cavity bottom plate, the dynamic load force transmission piston and the like form a Z-direction static load loading system together.
The guide rod is used for limiting the Z-direction positioning plate corresponding to the Z-direction positioning plate; the guide rods are uniformly distributed, one end of each guide rod is connected with the Z-direction positioning plate, the other end of each guide rod is connected with the guide rod support fixed on the base, and the influence of the Z-direction positioning plate on the stress state of the test piece due to the rotation in the Z-direction jack lifting process is avoided.
The dynamic load cavity force transfer plate is connected with the dynamic load force transfer piston, the dynamic load cavity force transfer plate is acted by an explosive load in the explosive cavity, and the explosive load is loaded on the test piece through the dynamic load force transfer piston; a gap is formed between the dynamic load cavity bottom plate and the dynamic load cavity force transmission plate, and soft materials are filled in the gap.
Go up the support column for many along the circumference equipartition, go up the support column upper end and link firmly with the dynamic load chamber bottom plate, go up the support column lower extreme and pass through the flange formation with the static load bearing ring and can dismantle the connection.
The base pass through rag bolt anchor subaerial, prevent that the device from removing, toppling in the test process.
The utility model provides a loaded test device of sound combination adopts above-mentioned technical scheme, has following beneficial effect:
① realizes the simultaneous application of three-direction static load and explosion dynamic load to the test piece, overcomes the defects of single static load, single dynamic load and dynamic load test device with confining pressure, and can meet the condition requirements of dynamic and static combined loading test.
② the explosive dynamic load is applied directly by explosive loading and explosion, and the explosive load can be adjusted by the explosive quantity and the position in the explosion cavity, so the action process of the explosive dynamic load can be reflected really.
③ static load loading system is similar to true triaxial apparatus, can apply three-dimensional static load to the test piece, three-dimensional static load size is adjustable, each other does not influence, the loading process of static load and dynamic load also each other does not influence, has simulated the real static, dynamic load environment that the ground body exists.
④, the method can effectively measure the mechanical characteristic parameters of the rock-soil mass such as stress, deformation and the like under the complex load condition.
⑤ the device has the advantages of visual test principle, accurate load state simulation, simple structure, good stability, convenient disassembly and easy operation.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a longitudinal sectional view of the present invention;
fig. 3 is a cross-sectional view taken along line a-a of fig. 2.
In the figure: the device comprises a 1-X-direction jack, a 2-static load bearing ring, a 3-static load loading plate, a 4-Z-direction jack, a 5-Z-direction positioning plate, a 6-guide rod, a 7-guide rod bracket, an 8-base, a 9-lower support column, a 10-upper support column flange, an 11-upper support column flange plate cover, a 12-upper support column, a 13-dynamic load cavity bottom plate, a 14-dynamic load force transfer piston, a 15-dynamic load cavity force transfer plate, a 16-dynamic load cavity barrel, a 17-dynamic load cavity upper cover, an 18-explosion source detonating cord, a 19-explosion source, a 20-test piece, a 21-foundation fixing bolt and a 22-Y-direction jack.
Detailed Description
The invention will be further described with reference to the following drawings and specific embodiments:
as shown in fig. 1 and combined with fig. 2, a dynamic and static combined loading test device is provided with an explosive dynamic load loading mechanism and a three-way static load loading mechanism; the three-way dead load loading mechanism is provided with a base 8; a static load bearing ring 2 is arranged right above the base 8; the static load bearing ring 2 is supported on the base 8 through a lower support column 9; two symmetrically arranged X-direction jacks 1 and two symmetrically arranged Y-direction jacks 22 are arranged in the static load bearing ring 2; the two X-direction jacks 1 and the two Y-direction jacks 22 are positioned in the same plane and are mutually vertical; the bottoms of the X-direction jack 1 and the Y-direction jack 22 are fixed on the inner wall surface of the static load bearing ring 2, and the heads of the X-direction jack 1 and the Y-direction jack 22 are connected with the static load loading plate 3; the static load loading plate 3 is tightly propped against the test piece 20, and the X, Y forms static load loading in the X, Y direction on the test piece to the jack; the bottom of the test piece 20 is supported by a Z-direction positioning plate 5, the Z-direction positioning plate 5 is connected to a Z-direction jack 4, and the Z-direction jack 4 is fixed on a base 8; the top of the test piece 20 is abutted against one end of a dynamic load force transmission piston 14, the side limit of the dynamic load force transmission piston 14 is abutted against a dynamic load cavity bottom plate 13, and the dynamic load cavity bottom plate 13 is connected to the static load bearing ring 2 through an upper support column 12 and an upper support column flange 10; the Z-direction jack 4, the base 8, the lower support column 9, the static load bearing ring 2, the upper support column 12, the dynamic load cavity bottom plate 13 and the dynamic load force transmission piston 14 form a Z-direction loading counterforce system together, and static load loading in the Z direction is carried out on the test piece 20; the X, Y directional jack and the Z-directional loading counterforce system jointly form a static load loading mechanism for carrying out three-directional loading on the test piece; the other end of the dynamic load force transmission piston 14 is connected with a dynamic load cavity force transmission plate 15 positioned in a dynamic load cavity cylinder 16; the dynamic loading cavity cylinder 16 is a cylinder structure with openings at two ends; the lower end of the dynamic load cavity cylinder 16 is sealed by a dynamic load cavity bottom plate 13; the dynamic load cavity bottom plate 13 is supported on the upper end surface of the static load bearing ring 2 through an upper support column 12; an explosion source 19 is arranged in the dynamic load cavity cylinder 16; the explosion source 19 is suspended right above the dynamic load cavity force transmission plate 15 through an explosion source firing cable 16; the upper end of the dynamic loading cavity cylinder 16 is connected with a dynamic loading cavity upper cover 17; the dynamic load cavity upper cover 17, the dynamic load cavity bottom plate 13 and the dynamic load cavity barrel 16 jointly form an explosion cavity, a medium is filled in the explosion cavity, the explosion action in the medium is transmitted through the dynamic load cavity force transmission plate and the dynamic load force transmission piston, and finally the explosion dynamic load of the test piece is loaded on the test piece.
The static load loading plate 3 is connected to X, Y and is arranged at the front end of the jack, after X, Y applies force to the jack, the end part of the static load loading plate is tightly propped against the side face of the test piece through the static load loading plate, X, Y are uniformly distributed and fixed on the static load bearing ring towards the bottom of the jack, and the static load bearing ring, the jack, the static load loading plate and the test piece form a X, Y-direction static load loading system.
The top end of the Z-direction jack 4 is connected with a Z-direction positioning plate 5, the Z-direction positioning plate 5 supports the bottom of a test piece, the bottom of the Z-direction jack 5 is fixed on a base 8, the base is sequentially connected with a lower support column, a static load bearing ring, an upper support column, a dynamic load cavity bottom plate and a dynamic load force transmission piston, and the dynamic load force transmission piston is downwards supported on the top of the test piece; after the Z-direction jack exerts force, the Z-direction jack, the Z-direction positioning plate, the test piece, the base, the lower support column, the static load bearing ring, the upper support column, the dynamic load cavity bottom plate, the dynamic load force transmission piston and the like form a Z-direction static load loading system together.
A guide rod 6 for limiting the Z-direction positioning plate is arranged corresponding to the Z-direction positioning plate; the guide rods 6 are uniformly distributed, one end of each guide rod 6 is connected with the Z-direction positioning plate 5, the other end of each guide rod is connected with the guide rod support fixed on the base, and the influence of the rotation of the Z-direction positioning plate on the stress state of the test piece in the Z-direction jack lifting process is avoided.
The dynamic load cavity force transfer plate is connected with the dynamic load force transfer piston, the dynamic load cavity force transfer plate is acted by an explosive load in the explosive cavity, and the explosive load is loaded on the test piece through the dynamic load force transfer piston; a gap is formed between the dynamic load cavity bottom plate and the dynamic load cavity force transmission plate, and soft materials (such as plastics or simulated rock and soil media and the like) are filled in the gap.
Go up support column 12 for many along the circumference equipartition, go up support column 12 upper end and move and carry chamber bottom plate 13 and link firmly, go up support column 12 lower extreme and static load and bear ring 2 and pass through flange formation and can dismantle the connection.
The base pass through rag bolt anchor subaerial, prevent that the device from removing, toppling in the test process.
The base 8 is anchored 21 to the ground by anchor bolts.
A space is reserved in the middle of the dynamic load cavity bottom plate 13 for the dynamic load force transmission piston 14 to pass through, the upper end of the dynamic load force transmission piston 14 is connected with the dynamic load cavity force transmission plate 15, and the lower end of the dynamic load force transmission piston extends out of the explosion cavity and directly abuts against the top of the test piece; a limit measure through a dynamic load cavity bottom plate 13 is arranged at the contact part of the dynamic load force transmission piston 14 and the test piece; the dynamic load transmission piston 14 can slightly move in the vertical direction, but has limiting measures in the vertical direction; when the movable load cavity moves downwards, the upper end of the movable load cavity is connected with the force transmission plate of the movable load cavity for limiting, and when the movable load cavity moves upwards under the loading of the Z-direction jack, the load is transmitted to the bottom plate of the movable load cavity through a limiting measure.
The dynamic load cavity force transfer plate 15 is arranged in the explosion cavity and connected with the dynamic load force transfer piston 14, and a certain gap is arranged between the dynamic load cavity force transfer plate 15 and the dynamic load cavity bottom plate 13 to fill simulated rock and soil media. Explosion in the explosion cavity generates explosion load, acts on the dynamic load cavity force transmission plate 15, acts on the test piece through the dynamic load force transmission piston 14, and applies explosion dynamic load to the test piece.
The method for testing by using the dynamic and static combined loading testing device comprises the following steps:
①, arranging the test site, checking the device components, confirming whether each component can work, preparing test materials, and manufacturing test pieces by using the test piece die.
② the device is divided into two parts from the upper support column flange connection part, for the lower half part, the test piece is placed on the Z-direction positioning plate, the test piece is basically between the X, Y direction jack top end static load loading plates, for the upper half part, the gap between the dynamic load cavity bottom plate and the dynamic load cavity force transfer plate is filled with soft material, then the explosion cavity is filled with simulation rock and soil medium material, if the test condition of explosion in air does not need to be filled with medium, and after the medium filling of the upper half part and the lower half part and the test piece placement are completed, the two parts are connected.
③ starting the Z-direction jack, jacking the test piece to move upwards until the upper end of the test piece contacts with the end of the dynamic load transmission piston, then continuing to jack up, preloading, controlling the loading range by the oil pressure of the Z-direction jack (if continuing the experiment, the condition of the single-shaft experiment.)
④ starting X, Y jacks respectively until the corresponding static load loading plate contacts with the side of the test piece, continuing to pressurize, preloading, controlling the loading range to the oil pressure of the jack through X, Y (if the test is continued in this state, the test is a bidirectional loading test.)
⑤ starting X, Y, Z directional jacks according to the experimental requirements, carrying out three-directional static load loading on the test piece, stabilizing the pressure after the test piece is in place, and waiting for the explosion experiment (if the test piece does not wait for the explosion experiment, the state of the three-directional loading experiment can be realized.)
⑥ calculating explosion parameters according to design, drilling holes in the medium filled in the explosion cavity to charge the powder, or directly charging the powder under the condition of no explosion, making safety measures, and performing experiments according to the explosion regulations.
⑦ after the explosion experiment is finished, the safety is ensured, the static load system is returned, and the experiment phenomenon is observed.
⑧ the test device is disassembled on the upper support column, and the test piece and the medium material are prepared again for the next experiment.
The utility model discloses still have some experimental complementary unit, but these experimental complementary unit are not our innovation part, do not explain at here too much, and experimental complementary unit includes detonating system, measuration system, safeguard and test piece mould, ensures that the experiment can normally develop smoothly.
The detonating system comprises a detonator, a detonating line, a trigger line and the like, wherein the detonator controls charging and explosion, transmits a signal to the data acquisition system through the trigger line and starts working.
The measuring system comprises a sensor, a data transmission line, an amplifier, a computer and the like. The sensors are respectively provided with a dynamic load cavity cylinder inner wall, an explosion cavity inner medium, a dynamic load cavity force transmission plate, a dynamic load force transmission piston, a test piece and each jack position, signals of the sensors are transmitted into a data acquisition system formed by an amplifier, a computer and the like through data transmission lines, and the computer is used for regulating and controlling acquisition, transmission, display and recording of test data.
Claims (7)
1. The utility model provides a loaded test device of sound combination which characterized in that: the test device is provided with an explosive dynamic load loading mechanism and a three-way static load loading mechanism; the three-way dead load loading mechanism is provided with a base; a static load bearing ring is arranged right above the base; the static load bearing ring is supported on the base through a lower support column; two symmetrically arranged X-direction jacks and two symmetrically arranged Y-direction jacks are arranged in the static load bearing ring; the two X-direction jacks and the two Y-direction jacks are positioned in the same plane and are mutually vertical; the bottoms of the X-direction jack and the Y-direction jack are fixed on the inner wall surface of the static load bearing ring, and the heads of the X-direction jack and the Y-direction jack are connected with the static load loading plate; the static load loading plate is tightly propped against the test piece, and the X, Y applies static load in the X, Y direction to the test piece to the jack; the bottom of the test piece is supported by a Z-direction positioning plate, the Z-direction positioning plate is connected to a Z-direction jack, and the Z-direction jack is fixed on the base; the top of the test piece is abutted against one end of a dynamic load force transmission piston, the side limit of the dynamic load force transmission piston is abutted against a dynamic load cavity bottom plate, and the dynamic load cavity bottom plate is connected to the static load bearing ring through an upper support column and an upper support column flange; the Z-direction jack, the base, the lower support column, the static load bearing ring, the upper support column, the dynamic load cavity bottom plate and the dynamic load force transmission piston jointly form a Z-direction loading counterforce system; the X, Y directional jack and the Z-directional loading counterforce system jointly form a static load loading mechanism for carrying out three-directional loading on the test piece; the other end of the dynamic load force transmission piston is connected with a dynamic load cavity force transmission plate positioned in the dynamic load cavity barrel; the dynamic load cavity cylinder is of a cylinder structure with openings at two ends; the lower end of the dynamic load cavity barrel is closed by a dynamic load cavity bottom plate; the dynamic load cavity bottom plate is supported on the upper end surface of the static load bearing ring through an upper support column; an explosion source is arranged in the dynamic load cavity barrel; the explosion source is suspended right above the dynamic load cavity dowel plate through an explosion source firing cable; the upper end of the dynamic load cavity cylinder is connected with the dynamic load cavity upper cover; the dynamic load cavity upper cover, the dynamic load cavity bottom plate and the dynamic load cavity barrel together form an explosion cavity, a medium is filled in the explosion cavity, the explosion action in the medium is finally loaded on the test piece through the transmission of the dynamic load cavity force transmission plate and the dynamic load force transmission piston, and the explosion dynamic load of the test piece is formed.
2. The dynamic and static combined loading test device according to claim 1, wherein: the static load loading plate is connected to X, Y and is arranged at the front end of the jack, after X, Y applies force to the jack, the end part of the static load loading plate is tightly propped against the side face of the test piece through the static load loading plate, X, Y are uniformly distributed and fixed on the static load bearing ring towards the bottom of the jack, and the static load bearing ring, the jack, the static load loading plate and the test piece form a X, Y-direction static load loading system.
3. The dynamic and static combined loading test device according to claim 1, wherein: the top end of the Z-direction jack is connected with the Z-direction positioning plate, the Z-direction positioning plate supports the bottom of a test piece, the bottom of the Z-direction jack is fixed on a base, the base is sequentially connected with a lower support column, a static load bearing ring, an upper support column, a dynamic load cavity bottom plate and a dynamic load force transmission piston, and the dynamic load force transmission piston is downwards propped against the top of the test piece; after the Z-direction jack exerts force, the Z-direction jack, the Z-direction positioning plate, the test piece, the base, the lower support column, the static load bearing ring, the upper support column, the dynamic load cavity bottom plate and the dynamic load force transmission piston jointly form a Z-direction static load loading system.
4. The dynamic and static combined loading test device according to claim 1, wherein: a Z-direction positioning plate for supporting the test piece is arranged corresponding to the test piece; the Z-direction positioning plate is provided with a guide rod for limiting the Z-direction positioning plate; the guide rods are uniformly distributed, one end of each guide rod is connected with the Z-direction positioning plate, the other end of each guide rod is connected with the guide rod support fixed on the base, and the influence of the Z-direction positioning plate on the stress state of the test piece due to the rotation in the Z-direction jack lifting process is avoided.
5. The dynamic and static combined loading test device according to claim 1, wherein: the dynamic load cavity force transfer plate is connected with the dynamic load force transfer piston, the dynamic load cavity force transfer plate is acted by an explosive load in the explosive cavity, and the explosive load is loaded on the test piece through the dynamic load force transfer piston; a gap is formed between the dynamic load cavity bottom plate and the dynamic load cavity force transmission plate, and soft materials are filled in the gap.
6. The dynamic and static combined loading test device according to claim 1, wherein: go up the support column for many along the circumference equipartition, go up the support column upper end and link firmly with the dynamic load chamber bottom plate, go up the support column lower extreme and pass through the flange formation with the static load bearing ring and can dismantle the connection.
7. The dynamic and static combined loading test device according to claim 1, wherein: the base pass through rag bolt anchor subaerial, prevent that the device from removing, toppling in the test process.
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| CN110108571A (en) * | 2019-06-06 | 2019-08-09 | 中国人民解放军军事科学院国防工程研究院工程防护研究所 | A kind of experimental rig and test method of coupled static-dynamic loadingi |
| CN112213211A (en) * | 2020-10-26 | 2021-01-12 | 中国人民解放军军事科学院国防工程研究院工程防护研究所 | Self-balancing structure for medium-high pressure explosive load generator |
| CN112903460A (en) * | 2021-02-04 | 2021-06-04 | 太原理工大学 | Device and method for testing multi-row group column single-shaft bearing of inclined goaf under disturbance influence |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110108571A (en) * | 2019-06-06 | 2019-08-09 | 中国人民解放军军事科学院国防工程研究院工程防护研究所 | A kind of experimental rig and test method of coupled static-dynamic loadingi |
| CN110108571B (en) * | 2019-06-06 | 2024-02-02 | 中国人民解放军军事科学院国防工程研究院工程防护研究所 | Dynamic and static combined loading test device and test method |
| CN112213211A (en) * | 2020-10-26 | 2021-01-12 | 中国人民解放军军事科学院国防工程研究院工程防护研究所 | Self-balancing structure for medium-high pressure explosive load generator |
| CN112213211B (en) * | 2020-10-26 | 2024-02-13 | 中国人民解放军军事科学院国防工程研究院工程防护研究所 | Self-balancing structure for medium-high pressure explosion load generator |
| CN112903460A (en) * | 2021-02-04 | 2021-06-04 | 太原理工大学 | Device and method for testing multi-row group column single-shaft bearing of inclined goaf under disturbance influence |
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