CN117147278B - Long-term load impact coupling loading method, system, equipment and medium - Google Patents
Long-term load impact coupling loading method, system, equipment and medium Download PDFInfo
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- 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
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- 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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
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- 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
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The invention belongs to the technical field of intelligent manufacturing equipment, and discloses a long-term load impact coupling loading method, a system, equipment and a medium, which comprise the following steps: the pre-loading frame comprises a supporting guide post, a bottom plate and a top plate; the support guide posts, the bottom plate and the top plate are connected through bolts, the movable plate moves in the four support guide posts, the sample is connected with the bottom plate through hinges and the movable plate, the static cylinder is fixed on the top plate through bolts, and the oil pressure sensor is arranged on the static cylinder. The invention can keep a certain loading force on the sample through the preloading system, and is relatively real and close to the actual environment. The preloaded system can be moved from the installation area to the test area by switching the system. Under the condition that the test piece is loaded for a long time, the test piece and the long-term loading system are moved to an impact test site together, and the test piece and the long-term loading system are kept stable in the process.
Description
Technical Field
The invention belongs to the technical field of intelligent manufacturing equipment, and particularly relates to a long-term load impact coupling loading method, a system, equipment and a medium.
Background
The existing bridge load impact device is used for directly performing impact test after fixing the boundaries of samples such as bridge piers, columns and the like and applying boundary load. And the samples of the bridge pier, the column and the like can directly carry out impact test under the condition of not receiving long-term axial load, the service state of the structure under the real condition can not be simulated, and accurate impact test data of the component and the structure under the long-term service state can not be obtained.
The prior art has two, and one of them is exerted long-term load through spring and hydro-cylinder, and after loading to certain time, will long-term load device remove to drop weight test machine below and test. The problems and defects are: the same set of springs and oil cylinders are used for static loading and dynamic loading, and firstly, under long-term loading, the springs are also worn along with the increase of long-term loading time, and the elasticity provided by the springs under impact test is correspondingly reduced; in addition, the patent comprises the conversion of a static loading system and a dynamic loading system, a static oil cylinder is used for long-term loading, and a spring and a dynamic oil cylinder are adopted for impact test, so that the loss of the spring in the long-term loading process is avoided, and the accuracy of the test is ensured. In the other prior art, the prestress generated by tensioning the finish rolling deformed steel bar through the oil cylinder applies long-term load to the test piece, and the test piece is replaced by the spring and the oil cylinder during impact test. The problems and defects are: the long-term load adopts the prestress of the deformed steel bar to apply the long-term load to the test piece, and the deformed steel bar can also have stress relaxation in the long-term use process, so that the prestress of each deformed steel bar is equal, the loading is uneven, and the stability of axial force in the static-to-dynamic conversion process is difficult to ensure.
In addition, the tests carried out by the two prior art devices are all of reduced scale and small energy, the technical requirements for the loading device and the boundary oil cylinder are lower, the patent can meet the maximum boundary loading of 600 tons, the maximum boundary following loading speed can reach 7m/s, and the requirements on precision control are higher.
In addition, the two patents do not mention the process of installing the long-term loading device in the impact test area, and under the impact test of large structural parts and large energy, the success probability of the long-term loading process is greatly influenced by the stability of the transportation process, and the long-term loading is meaningless.
In addition, the two technical schemes do not mention the contents such as test piece deformation condition detection under long-term loading (namely, indexes for judging the success of long-term loading and corresponding required technologies), and cannot prove the accuracy and the effectiveness of a long-term loading system.
Through the above analysis, the problems and defects existing in the prior art are as follows:
1) The same set of springs and the oil cylinder are adopted for static loading and dynamic loading, and the springs are worn in the long-term loading process, so that the loading accuracy in the impact test is affected.
2) The screw-thread steel prestress is adopted for long-term loading, so that the problems of stress relaxation and uneven loading exist, and the stability of axial force cannot be ensured.
3) In the prior art, a reduced scale and small energy test is adopted, the technical requirements on a loading device and a boundary oil cylinder are not high, and the test requirement of a large structural member cannot be met.
4) The process of transporting the long-term loading device to the test area is not considered, and the long-term loading effect is lost easily due to transportation vibration, so that the success rate of the test is affected.
5) The deformation detection technology under long-term loading is not mentioned, and the accuracy and the effectiveness of the long-term loading cannot be judged.
6) The impact resistance of the real structure after long-term service cannot be simulated, and accurate impact test data cannot be obtained.
7) The long-term loading device and the impact loading device are separated, and the continuous and stable application of the axial force is difficult to ensure in the conversion process.
In summary, the main problem in the prior art is that the integrated implementation of long-term loading and impact test of a large structural member cannot be satisfied, continuous and stable axial force loading cannot be realized, the long-term service state of a real structure is difficult to simulate, and accurate impact test data cannot be obtained.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides a long-term load impact coupling loading method, a system, equipment and a medium.
The invention is realized in such a way that a long-term load impact coupling loading system comprises: the pre-loading frame comprises a supporting guide post, a bottom plate and a top plate; the support guide posts, the bottom plate and the top plate are connected through bolts, the movable plate moves in the four support guide posts, the sample is connected with the bottom plate through hinges and the movable plate, the static cylinder is fixed on the top plate through bolts, and the oil pressure sensor is arranged on the static cylinder.
Another object of the present invention is to provide a long-term load impact coupling loading method applied to the long-term load impact coupling loading system, the long-term load impact coupling loading method comprising:
after the sample is fixed, the static cylinder starts to act, the moving plate moves, the sample is clamped through the hinge, the oil pressure sensor is arranged on the static cylinder, and the clamping force of the sample can be obtained through software. The whole tool is placed at one position, so that the long-term loading of the sample can be performed, and the deformation condition of the sample under the long-term loading force is simulated.
Further, after the preloading frame is loaded for a long time, the preloading system is integrally moved to a test area through the trailer and the crane, so that the preloading system is prevented from being changed by the change of external environment in the moving process.
Further, the preload displacement device is mounted by bolts intermediate the two reaction frames. The loading cylinder applies force to the left and right moving plates through springs. The static oil cylinder slowly discharges force, the dynamic loading oil cylinder slowly applies force and compresses the spring, and through analysis and calculation of software, the slow unloading force of the static oil cylinder and the buffering and applying force of the dynamic loading oil cylinder are ensured to maintain balance, so that the loading force born by a sample is kept constant, after the dynamic loading oil cylinder is loaded to a set test force value, the dynamic loading oil cylinder keeps the test force constant, the static oil cylinder is inconvenient, after the static oil cylinder loading force value is unloaded to a zero position, the two static oil cylinders are detached, the impact test can be carried out subsequently, and the impact resistance mechanical property of the test under the long-term load effect is studied.
It is a further object of the present invention to provide a computer device comprising a memory and a processor, the memory storing a computer program which, when executed by the processor, causes the processor to perform the steps of the long-term load impact coupled loading method.
It is a further object of the present invention to provide a computer readable storage medium storing a computer program which, when executed by a processor, causes the processor to perform the steps of the long term load impact coupled loading method.
In combination with the technical scheme and the technical problems to be solved, the technical scheme to be protected has the following advantages and positive effects:
first, aiming at the technical problems existing in the prior art, some technical effects brought by solving the problems have creative effects. The specific description is as follows:
(1) The test sample product is subjected to long-term loading of the test sample and keeps stable loading force before the impact test is carried out.
(2) Under the condition that the test piece is loaded for a long time, the test piece and the long-term loading system are moved to an impact test site together, and the test piece and the long-term loading system are kept stable in the process.
(3) The sample loading boundary condition before impact test changes from static loading to dynamic loading, and the loading force is kept stable, so that the validity and accuracy of long-term loading are ensured.
Secondly, the invention can keep a certain loading force on the sample through the preloading system, and the sample is relatively real and close to the actual environment. The preloaded system can be moved from the installation area to the test area by switching the system.
According to the invention, the long-term loading of the test sample is directly carried out through the static cylinder, the loading process is stable and controllable, and the deformation condition of the test sample is monitored in real time.
Long-term loading device for transportation through flat car and crane, and stability in transportation process is guaranteed
The boundary following loading requirement of the high-speed high-energy impact test is realized through the conversion of the static loading cylinder, the spring loading cylinder and the dynamic loading cylinder.
Thirdly, long-term coupling high-speed high-energy impact test can be carried out, the device can meet the long-term loading coupling impact test of a reduced scale, a large specific scale and even a full scale, and the research on interdisciplinary communication and service in the military industry can be realized.
The invention fills the high-speed high-energy impact coupling test (maximum impact speed 29m/s, maximum impact energy 210 WJ) under long-term loading at home and abroad.
In the conventional long-term loading coupling impact test, the test pieces are mostly in a reduced-scale test, the impact energy is smaller (< 5 WJ), the impact speed is low, the structural power is correspondingly not obvious, the reduced-scale test pieces are difficult to reflect the actual damage condition of the test pieces in actual size, the invention can meet the long-term loading coupling impact test of the test pieces with large specific scales and even full scales, and the damage condition of structural members under the actual condition can be obtained.
Fourth, the long-term load impact coupling loading method related in the above technical solution has a number of significant technical improvements, and the following are some important aspects thereof:
1. the comprehensive loading method comprises the following steps: the method couples long-term load and impact load together, simulates the deformation of the sample under the condition of continuous load in a long time, and more truly simulates the situation in practical application.
2. Sample clamping mechanism: by the design of the moving plate and the hinge, the clamping of the sample is realized, and the loading force can be uniformly applied to the sample, so that the test condition is more accurately simulated.
3. Oil pressure sensor and data acquisition: the application of the oil pressure sensor enables the clamping force of the sample to be measured and recorded in real time, and the test process can be better monitored by combining data acquisition and analysis, so that the accuracy and reliability of loading control are improved.
4. Mobile loading system: through the integral movement of the preloading frame, the preloading system is prevented from being changed by the change of external environment in the moving process, and the consistency and the repeatability of the test are ensured.
5. Dynamic loading hydro-cylinder and spring: the design of the dynamic loading cylinder and the spring enables the loading force to be gradually applied and kept constant, so that the long-term loading condition of the test is better simulated.
6. Automatic control and intelligence: and intelligent measures such as automatic control, remote monitoring, self-adaptive control and intelligent analysis are introduced, so that the test process is more automatic and intelligent, and the efficiency, controllability and reliability of the test are improved.
7. Comprehensive research capability: by combining the test sample under the long-term load effect with the impact test, the impact resistance of the test sample under the long-term load can be more comprehensively researched, and deeper data support is provided for research and application in the related field.
The technical progress makes the technical proposal more accurate and controllable when simulating and researching the performance of the test sample under the action of long-term load, improves the efficiency and reliability of the experiment by an intelligent means, and brings remarkable innovation and improvement for the research and application in the fields of material science, engineering technology and the like.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a diagram of a preloaded framework according to an embodiment of the present invention;
FIG. 2 is a diagram of the overall system architecture provided by an embodiment of the present invention;
wherein, 1, the bottom plate; 2. supporting guide posts; 3. a sample; 4. a hinge; 5. a moving plate; 6. a static cylinder; 7. a top plate; 8. a reaction frame; 9. preloading the frame; 10. a spring; 11. an auxiliary oil tank; 12. a dynamic loading oil cylinder; 13. an accumulator set; 14. and a hydraulic source.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Aiming at the problems existing in the prior art, the invention provides a long-term load impact coupling loading method, a system, equipment and a medium, and the invention is described in detail below with reference to the accompanying drawings.
The core innovation points of the long-term load impact coupling loading system provided by the embodiment of the invention mainly comprise the following aspects:
1) Design of the preloaded frame: through the combined design of the supporting guide post, the bottom plate and the top plate, a stable pre-loading frame is formed, so that the test piece can be effectively supported under the condition of long-term load. The moving plate moves in the four supporting guide posts, so that the test piece is ensured to be stable in the loading process of different stages.
2) Real-time monitoring and adjustment: the real-time monitoring and adjustment of the loading axial force are realized through the software system, so that the axial pressure of the test piece can be ensured to be always kept within the preset range in the long-term loading process. Meanwhile, the software system can monitor the deformation of the test piece and master the state of the test piece in real time.
3) Ensure the stability in the transportation and installation process: in the whole transportation process, components such as a long-term loading device, a test piece, a static cylinder and the like are required to be ensured to be stable, and the loading axial force is prevented from changing in the transportation process. In addition, during the installation of the impact test system, it is also necessary to ensure a constant force and to avoid the occurrence of deformation of the test piece.
4) The synergy of the static oil cylinder and the dynamic oil cylinder: in the whole test process, the static oil cylinder and the dynamic oil cylinder need to cooperate to ensure the constant force in the unloading and loading processes. Meanwhile, an oil pressure sensor arranged on the static oil cylinder can monitor loading axial force in real time, and the accuracy of the axial pressure loading process is ensured.
5) Impact coupling loading: the long-term load impact coupling loading system combines the long-term load with the impact loading, so that the test piece can carry out the impact test while bearing the long-term load. The coupling loading method can simulate complex load conditions in practical engineering application, and the practicability and accuracy of the test are improved.
The long-term load impact coupling loading system is innovative in the aspects of preloading frame design, real-time monitoring and adjustment, transportation and installation stability, the synergistic effect of static and dynamic oil cylinders and impact coupling loading, and provides an effective solution for realizing impact test under the long-term load condition.
Based on the original long-term load impact coupling loading system, the following scheme can be considered for improvement:
1) A precision displacement sensor is introduced: and a precise displacement sensor is arranged on the movable plate so as to monitor the displacement condition of the test piece in the loading process in real time. By connecting with the software system, real-time processing and analysis of displacement data can be realized so as to control the test process more accurately.
2) And (3) adding a dynamic oil cylinder: and a dynamic oil cylinder is newly added on the preloading frame to realize dynamic force control in the impact loading stage. The dynamic oil cylinder can work together with the static oil cylinder to ensure that the force applied to the test piece in the preparation stage of the impact test is always kept within a preset range.
3) Optimizing a test piece fixing mode: through improving the connected mode of test piece and movable plate, adopt quick auto-change over device to install and dismantle the test piece fast in different experimental preparation stages, improve test efficiency.
4) An intelligent control system is introduced: an advanced intelligent control system is adopted, and control parameters of the static oil cylinder and the dynamic oil cylinder are automatically adjusted according to test data through a self-learning algorithm, so that intelligent control of the whole test process is realized.
5) Adding a safety protection device: safety guards, such as guard rails, safety gratings, etc., are added around the preloaded frame to prevent accidental injury during testing.
The original long-term load impact coupling loading system is improved by introducing a precise displacement sensor, adding a dynamic oil cylinder, optimizing a test piece fixing mode, introducing an intelligent control system, adding a safety protection device and the like, so that the accuracy, the efficiency and the safety of a test can be further improved.
As shown in fig. 1 and 2, the detailed connection relationship between the preloaded frame structure and the overall system structure of the present invention is as follows:
the preloading frame 9 consists of a bottom plate 1, a supporting guide post 2, a top plate 7, a moving plate 5 and a static cylinder 6. The lower end of the bottom plate 1 is fixed with the ground, the supporting guide post 2 is vertically arranged on the bottom plate 1, the top plate 7 is transversely arranged on the upper part of the supporting guide post 2, the movable plate 5 can slide up and down along the supporting guide post 2, one end of the static cylinder 6 is fixed with the bottom plate 1, and the other end is connected with the movable plate 5.
The two ends of the sample 3 are rotatably connected with the bottom plate 1 and the top plate 7 through the hinge 4. The sample 3 is pushed up by the moving plate 5 driven by the static cylinder 6, and a preload is applied to the sample 3.
The pre-load frame 9 is placed in a reaction frame 8, which reaction frame 8 is used to provide a reaction support for the pre-load applied by the pre-load frame 9.
The dynamic loading cylinder 12 is arranged between the pre-loading frame 9 and the reaction frame 8, one end of the dynamic loading cylinder is rotatably connected with the reaction frame 8, and the other end of the dynamic loading cylinder is rotatably connected with the bottom plate 1. The dynamic loading cylinder 12 is used to apply dynamic impact loads.
The auxiliary oil tank 11 is arranged between the pre-loading frame 9 and the counter-force frame 8, is used for storing and adjusting hydraulic oil, and is connected with the hydraulic source 14, the static oil cylinder 6 and the dynamic loading oil cylinder 12 to provide power hydraulic oil for the hydraulic source, the static oil cylinder 6 and the dynamic loading oil cylinder.
The accumulator group 13 is connected to both ends of the dynamic loading cylinder 12 for storing power required for dynamic loading and increasing impulse width.
A spring 10 is interposed between the pre-load frame 9 and the reaction frame 8 for reducing the impact upon the start of the static cylinder 6 and the dynamic load cylinder 12.
According to the structure, the sample 3 is preloaded through the preloading frame 9, then the impact load is applied by the dynamic loading oil cylinder 12, the real situation that the structure is impacted after being stressed for a long time can be simulated, and accurate impact test data are obtained. The hydraulic system provides power, the energy accumulator increases impact pulse, and the spring reduces impact, so that stable and continuous loading is realized.
The test steps are as follows: the preloading frame 9 comprises supporting guide posts 2, a bottom plate 1 and a top plate 7 which are connected through bolts, a moving plate 5 moves in the four supporting guide posts 2, a sample 3 is connected with the moving plate 5 through hinges 4 and is connected with the bottom plate 1 through bolts, a static cylinder 6 is fixed on the top plate 7 through bolts, and an oil pressure sensor is arranged on the static cylinder 6. After the sample 3 is fixed, the static cylinder 6 starts to act, the moving plate 5 moves, the sample 3 is clamped through the hinge 4, the hydraulic sensor is arranged on the static cylinder 6, and the clamping force of the sample can be obtained through software. The whole tool is placed at one position, so that the long-term loading of the sample 3 can be performed, and the deformation condition of the sample 3 under the long-term loading force is simulated.
After the pre-loading frame 9 is loaded for a long time, the loading system is integrally moved to a test area through a trailer and a crane, so that the pre-loading system 9 is prevented from being changed by the change of external environment in the moving process, the pre-loading movement 9 is arranged between two counter-force frames 8 through bolts, one end of the pre-loading frame is provided with a dynamic loading oil cylinder 12, the dynamic loading oil cylinder 12 is connected with the counter-force frames 8 through bolts, the loading oil cylinder 12 is used for slowly unloading force on the moving plate 5 through a spring 10, meanwhile, the dynamic loading oil cylinder 12 slowly applies force and compresses the spring 10, and through analysis and calculation of software, the slow unloading force of the static oil cylinder 6 and the buffering and applying force of the dynamic loading oil cylinder 12 are ensured to maintain balance, so that the loading force borne by a sample 3 is kept constant, after the dynamic loading oil cylinder 12 is loaded to a set test force value, the dynamic loading oil cylinder 12 is kept constant and inconvenient, after the loading force value of the static oil cylinder 6 is unloaded to a zero position, the two static oil cylinders are detached, an impact test can be carried out, and the impact mechanical performance of the test under the long-term load effect can be studied.
An application embodiment of the present invention provides a computer device, where the computer device includes a memory and a processor, and the memory stores a computer program, and when the computer program is executed by the processor, causes the processor to execute the steps of the long-term load impact coupling loading method.
An application embodiment of the present invention provides a computer-readable storage medium storing a computer program which, when executed by a processor, causes the processor to perform the steps of the long-term load impact coupling loading method.
The long-term load impact coupling loading method applied to a certain system comprises the following specific scheme:
the invention provides a method for long-term load impact coupling loading, which aims to simulate deformation of a sample under the condition of long-term loading force. To intelligent this approach, the following aspects may be employed:
1. automatic control and data acquisition: the oil pressure sensor and the loading oil cylinder in the system are connected with a computer or a control system to realize automatic control and data acquisition. This will allow you to monitor parameters like the loading force of the sample, the progress of the test etc.
2. Remote monitoring: during the test, you can transmit data to a remote server or cloud platform to monitor the test progress and results from a remote location. This may be achieved through network connections and remote access.
3. And (3) self-adaptive control: the self-adaptive control algorithm is developed by utilizing the data acquired in real time, and the self-adaptive control algorithm can be adjusted according to the loading condition in the test process, so that the stability and the accuracy of the test are ensured.
4. Intelligent analysis and report generation: integrating software analysis capabilities into the system, through intelligent analysis of experimental data, can provide more detailed information such as test force curves, deformation conditions, etc., and automatically generate reports.
5. Remote control and adjustment: in some cases, you may need to make remote adjustments based on experimental progress or results. Through remote control, you can change loading force, stop test etc. to satisfy different research demands.
6. Safety protection and alarm system: and integrating a safety protection and alarm system to ensure the safety of the test process. When an abnormal situation occurs, the system can automatically stop the test and send out an alarm.
Through realizing above-mentioned intelligent measure, improve experimental degree of automation, efficiency and accuracy. This will enable you to better monitor and control the test procedure, gain more insight into the performance of the sample, and ultimately improve the reliability and practicality of the study.
The scheme of the embodiment of the invention is intelligently improved, and the following measures can be mainly adopted:
1) The deformation condition of the sample is detected by adopting a deflection sensor, and the pressure of the static cylinder and the dynamic loading cylinder is regulated by a control system, so that the precise control and correction of the pre-loading amount and the impact load are realized. The control system can adopt a PLC controller or an industrial PC machine, etc.
2) And a closed-loop control system is adopted, and according to deformation data measured by a deflection sensor, a static cylinder and a dynamic loading cylinder are automatically controlled to realize loading by combining a preset loading scheme. Without the need for manual intervention.
3) The automatic hydraulic adjusting system is adopted, the hydraulic source and the auxiliary oil tank of the hydraulic system are intelligently regulated and controlled according to the loading requirement, and the dynamic hydraulic pressure and the pressure balance stability of the loading device are ensured.
4) And an automatic transportation system is adopted to stably convey the preloaded frame to the position under the reaction frame, so that errors of manual operation are reduced, and the success rate of long-term loading is improved. The transport system may also be implemented using rail transport or automatic navigation vehicles.
5) An automatic detection device is added to monitor working conditions of a pre-loading frame, a dynamic loading oil cylinder, a hydraulic system and the like, and the automatic alarm can be given out and loading can be stopped once an abnormality is found, so that test safety is ensured.
6) The pre-set loading control program is adopted to realize full-automatic control of pre-loading, acceleration loading, impact loading, unloading and the like, so that the manual error is reduced, and the test precision and efficiency are improved.
7) A virtual simulation technology is adopted, a simulation model of pre-loading and impact tests is firstly established on a computer according to a loading scheme, the rationality of the loading scheme and a control program is verified, and then an actual test is carried out.
Through the intelligent improvement, full automation and intelligent control of long-term preloading and impact test of the structure can be realized, the test precision and efficiency are improved, and the test safety is ensured. The entire test protocol and procedure can be further validated and optimized in conjunction with simulation techniques.
The following are four specific examples of long term load impact coupled loading systems:
example 1:
the pre-loading frame is made of a steel structure, and the supporting guide posts, the bottom plate and the top plate are connected through high-strength bolts;
a linear displacement sensor is arranged on the movable plate, and the displacement of the test piece is monitored in real time;
the static oil cylinder and the dynamic oil cylinder are equipped to work cooperatively in the preparation stage of the impact test;
the test piece and the moving plate are fixed through magnetic force adsorption, so that quick switching is realized;
an intelligent control system based on a neural network is used for realizing self-adaptive adjustment;
safety gratings are added as safety protection devices.
Example 2:
the pre-loading frame is made of an aluminum alloy material, and the supporting guide post, the bottom plate and the top plate are connected through mortise and tenon joints;
an electromagnetic displacement sensor is arranged on the movable plate, and the displacement of the test piece is monitored in real time;
the static cylinder and the air cylinder are equipped to work cooperatively in the preparation stage of the impact test;
the test piece is fixed with the movable plate through a quick buckle, so that quick switching is realized;
an intelligent control system based on fuzzy control is used for realizing self-adaptive adjustment;
the guard rail is added as a safety protection device.
Example 3:
the pre-loading frame is made of carbon fiber composite materials, and the supporting guide posts, the bottom plate and the top plate are connected in an adhesive mode;
a photoelectric displacement sensor is arranged on the movable plate, and the displacement of the test piece is monitored in real time;
the static cylinder and the electric cylinder are equipped to work cooperatively in the preparation stage of the impact test;
the test piece is fixed with the movable plate through a clamp spring, so that quick switching is realized;
an intelligent control system based on a genetic algorithm is used for realizing self-adaptive adjustment;
safety shields are added as safety guards.
Example 4:
the preloading frame is made of stainless steel materials, and the supporting guide posts, the bottom plate and the top plate are connected by welding;
the moving plate is provided with an acoustic wave type displacement sensor for monitoring displacement of the test piece in real time;
the static cylinder and the hydraulic cylinder are equipped to work cooperatively in the preparation stage of the impact test;
the test piece is fixedly connected with the movable plate through threads, so that quick switching is realized;
an intelligent control system based on reinforcement learning is used for realizing self-adaptive adjustment;
a safety net is added as a safety protection device.
The foregoing is merely illustrative of specific embodiments of the present invention, and the scope of the invention is not limited thereto, but any modifications, equivalents, improvements and alternatives falling within the spirit and principles of the present invention will be apparent to those skilled in the art within the scope of the present invention.
Claims (8)
1. A long term load impact coupled loading system comprising: the pre-loading frame comprises a supporting guide post, a bottom plate and a top plate; the support guide posts are connected with the bottom plate and the top plate through bolts, the movable plate moves in the four support guide posts, the sample is connected with the bottom plate through hinges and the movable plate, the static cylinder is fixed on the top plate through bolts, and an oil pressure sensor is arranged on the static cylinder;
a precise displacement sensor is arranged on the movable plate so as to monitor the displacement condition of the test piece in the loading process in real time; the displacement data is processed and analyzed in real time by being connected with a software system;
a dynamic oil cylinder is newly added on the preloading frame to realize dynamic force control in the impact loading stage, and the dynamic oil cylinder can work cooperatively with the static oil cylinder in the test preparation stage to ensure that the force applied to a test piece before impact test preparation is always kept within a preset range;
the pre-loading movement is arranged between the two reaction frames through bolts, a dynamic loading oil cylinder is arranged at one end of the pre-loading movement, the dynamic loading oil cylinder is connected with the reaction frames through bolts, the loading oil cylinder acts on the moving plate through a spring, the static oil cylinder slowly unloads force, meanwhile, the dynamic loading oil cylinder slowly applies force and compresses the spring, the slow unloading force of the static oil cylinder and the buffering and applying force of the dynamic loading oil cylinder are ensured to maintain balance through analysis and calculation of software, the loading force born by a sample is kept constant, after the dynamic loading oil cylinder is loaded to a set test force value, the test force is kept constant by the dynamic loading oil cylinder, after the loading force value of the static oil cylinder is unloaded to a zero position, the two static oil cylinders are detached, the subsequent impact test can be carried out, and the impact resistance mechanical property of the test under the long-term load effect is studied.
2. The long term load impact coupled loading system of claim 1, wherein a fast switching device is employed;
and an intelligent control system is adopted, and control parameters of the static oil cylinder and the dynamic oil cylinder are automatically adjusted according to test data through a self-learning algorithm.
3. The long term load impact coupled loading system of claim 1, wherein a safety guard is added around the preloaded frame.
4. A long term load impact coupled loading method applied to the system of any one of claims 1 to 3, comprising:
after the sample is fixed, the static cylinder starts to act, the moving plate moves, the sample is clamped through the hinge, an oil pressure sensor is arranged on the static cylinder, the clamping force of the sample can be obtained through software, the whole tool is placed at one position, long-term loading of the sample is carried out, and the deformation condition of the sample under the long-term loading force is simulated.
5. The long term load impact coupling loading method of claim 4, wherein the preloading frame is moved to the test area by the whole body of the trailer and the crane after the preloading frame is loaded for a long period of time, so that the preloading system is not changed by the change of external environment in the moving process.
6. The long-term load impact coupling loading method according to claim 4, wherein after the preloading frame is subjected to long-term loading, the loading system is integrally moved to the test area through the trailer and the crane, so that the preloading system is not influenced by external environmental changes in the moving process; the pre-loading movement is arranged between the two reaction frames through bolts, one end of the pre-loading movement is provided with a dynamic loading oil cylinder, the dynamic loading oil cylinder is connected with the reaction frames through bolts, the loading oil cylinder applies force on the moving plate through a spring, meanwhile, the static oil cylinder slowly unloads the force, the dynamic loading oil cylinder slowly applies force and compresses the spring, and the balance between the slow unloading force of the static oil cylinder and the buffering and boosting force of the dynamic loading oil cylinder is kept through software analysis and calculation, so that the loading force applied to a sample is kept constant.
7. The method for loading long-term load impact coupling according to claim 4, wherein after the dynamic loading cylinder is loaded to a set test force value, the dynamic loading cylinder maintains the test force constant, and the load force value of the static cylinder is unloaded to a zero position, and then the two static cylinders can be disassembled, so that impact tests are carried out, and the impact mechanical properties of the test under the action of long-term load are studied.
8. The method of claim 4, wherein the process of the test is automated, monitored, controlled, analyzed and reported by intelligent means such as automatic control and data acquisition, remote monitoring, adaptive control, intelligent analysis and report generation, remote control and adjustment, safety protection and alarm system, to improve the efficiency, stability and reliability of the test.
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