CN111458090A - Model basic dynamic parameter testing system - Google Patents
Model basic dynamic parameter testing system Download PDFInfo
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- CN111458090A CN111458090A CN202010448836.3A CN202010448836A CN111458090A CN 111458090 A CN111458090 A CN 111458090A CN 202010448836 A CN202010448836 A CN 202010448836A CN 111458090 A CN111458090 A CN 111458090A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0066—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by exciting or detecting vibration or acceleration
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0075—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by means of external apparatus, e.g. test benches or portable test systems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/025—Measuring arrangements
Abstract
The invention discloses a model basic dynamic parameter testing system, which comprises a vibration exciter module; a force detection module; a vibration detection module; the control device is respectively connected with the vibration exciter module, the force detection module and the vibration detection module, controls the vibration exciter module to vibrate at a preset frequency according to a preset test program, and performs data processing on detection signals sent by the force detection module and the vibration detection module to obtain test data of a model foundation. The system is applied, the control device is respectively connected with the vibration exciter module, the force detection module and the vibration detection module, the vibration exciter module is controlled to vibrate at a preset frequency according to a preset test program, data processing is carried out on detection signals sent by the force detection module and the vibration detection module, test data of a model foundation are obtained, a test process is controlled and completed by the control device, the labor intensity of testers is reduced, and the reliability and the test precision of the test data are improved.
Description
Technical Field
The invention relates to the technical field of geotechnical engineering investigation, in particular to a model foundation dynamic parameter testing system.
Background
The purpose of the model foundation dynamic parameter test is to obtain dynamic parameters of the foundation (including natural foundation and artificial foundation), including compression resistance, shear resistance, bending resistance and torsional rigidity coefficient of the foundation; the damping ratio of the vertical and horizontal return direction to the first vibration mode and the torsion direction and the total mass of the vibration participating in the foundation are obtained. Dynamic parameters of the pile foundation can also be tested, including compressive rigidity of a single pile; shear and torsional stiffness coefficients of the pile foundation; the damping ratio of the vertical and horizontal steering and the torsional steering of the pile foundation and the total mass of the oscillation participating. The test is also a complex and time-consuming work, and during manual operation, a tester needs to control one or more vibration exciters at the same time, adjust the frequency and output of the vibration exciters, record the vibration waveform of a model foundation, and needs to pay high attention, so that the tester is very easy to fatigue during long-time work. After the field test is finished, a large amount of time is spent for manually reading the measured vibration waveform, the amplitude of the model base of each frequency test point is calculated, an amplitude-frequency response curve is formed, and then the power parameter of the test foundation is calculated and obtained. The testing precision is low and the labor intensity of personnel is large.
Disclosure of Invention
In view of the above, a first objective of the present invention is to provide a model-based dynamic parameter testing system, so as to solve the problems that the existing model-based dynamic parameter testing requires manual operation and data reading, and has complex operation and low testing precision.
In order to achieve the first object, the invention provides the following technical scheme:
a model based dynamic parameter testing system, comprising:
the vibration exciter module is arranged on the model foundation above the foundation to be tested and is used for vibrating according to a preset frequency so as to act on the model foundation;
the force detection module is used for detecting the excitation force value of the vibration exciter module;
the vibration detection module is arranged on the model base and used for measuring the simple harmonic vibration acceleration or speed of the model base vibration to obtain a vibration displacement value;
and the control device is respectively connected with the vibration exciter module, the force detection module and the vibration detection module, controls the vibration exciter module to vibrate at a preset frequency according to a preset test program, and performs data processing on detection signals sent by the force detection module and the vibration detection module to obtain test data of the model foundation.
Preferably, the control device includes:
the central processing unit is respectively connected with the vibration exciter module, the force detection module and the vibration detection module;
and the digital display and program control module is connected with the central processing unit, and sends a power parameter test program and a parameter setting instruction to the central processing unit and displays test data of the model foundation returned by the central processing unit.
Preferably, the control device further includes:
the signal generator and the power amplification module are respectively connected with the central processing unit, the signal generator is connected with the power amplification module, and the power amplification module is connected with the vibration exciter module;
the signal generator receives the instruction of the central processing unit, converts the instruction into a corresponding sine wave signal and sends the sine wave signal to the power amplification module, and the power amplification module amplifies the sine wave signal and sends the sine wave signal to the vibration exciter module.
Preferably, the central processor is further configured to:
and when the real-time excitation force value is smaller than the preset parameter excitation force value, adjusting the current amplification factor of the power amplification module so that the difference value between the real-time excitation force value and the preset parameter excitation force value is within the allowable deviation range.
Preferably, the control device further includes:
the test data acquisition module is connected with the central processing unit and is respectively connected with the force detection module and the vibration detection module to acquire test data.
Preferably, the control device further includes:
and the information storage module is connected with the central processing unit and used for storing the test data.
Preferably, the force detection module is specifically a force sensor, and the force sensor is a piezoelectric force sensor or a resistance strain gauge force sensor.
Preferably, the vibration detection module is specifically a piezoelectric acceleration sensor, a built-in IC piezoelectric acceleration sensor, or a magnetoelectric velocity sensor.
Preferably, the control device is a display or a PC.
Preferably, the digital display and program control module includes:
the microprocessor is used for storing a model basic dynamic parameter test program;
the touch screen is connected with the microprocessor to select a test program and set parameters;
the information transcoder is connected with the microprocessor, and the microprocessor is connected with the central processing unit through the information transcoder;
and the power supply control module and the radiator are respectively connected with the microprocessor.
The invention provides a model basic dynamic parameter testing system, which comprises: the vibration exciter module is arranged on the model foundation above the foundation to be tested and is used for vibrating according to a preset frequency so as to act on the model foundation; the force detection module is used for detecting the excitation force value of the vibration exciter module; the vibration detection module is arranged on the model base and used for measuring the simple harmonic vibration acceleration or speed of the model base vibration to obtain a vibration displacement value; the control device is respectively connected with the vibration exciter module, the force detection module and the vibration detection module, controls the vibration exciter module to vibrate at a preset frequency according to a preset test program, and performs data processing on detection signals sent by the force detection module and the vibration detection module to obtain test data of a model foundation.
The model foundation dynamic parameter testing system provided by the invention is respectively connected with the vibration exciter module, the force detection module and the vibration detection module through the control device, the vibration exciter module is controlled to vibrate at a preset frequency according to a preset testing program, and data processing is carried out on detection signals sent by the force detection module and the vibration detection module to obtain model foundation testing data, the testing process is controlled and completed by the control device, the labor intensity of testing personnel is reduced, and the reliability and the testing precision of the testing data are improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of a vertical forced vibration testing device for a model foundation according to an embodiment of the present invention;
fig. 2 is a schematic block diagram of a structure of a control device according to an embodiment of the present invention;
fig. 3 is a schematic block diagram of a structure of a digital display and program control module according to an embodiment of the present invention.
The drawings are numbered as follows:
the device comprises a spring rope 10, a counterweight 20, an electromagnetic vibration exciter 30, a force sensor 40, an anchor bolt 50, a vibration sensor 60, a model foundation 70, a foundation 80 to be tested and a control device 90;
a central processing unit 910, a digital display and program control module 920, a signal generator 930, an information storage module 940, a power amplification module 950, an acquisition module 960, and an A-D converter 970;
touch-sensitive screen 921, power control module 922, radiator 923, microprocessor 924, information transcoder 925.
Detailed Description
The embodiment of the invention discloses a model basic dynamic parameter testing system, which aims to solve the problems that the existing model basic dynamic parameter testing needs manual operation and data reading, is complex in operation, is low in testing precision and the like.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, fig. 1 is a schematic view of a model foundation vertical forced vibration testing apparatus according to an embodiment of the present invention; fig. 2 is a schematic block diagram of a structure of a control device according to an embodiment of the present invention; fig. 3 is a schematic block diagram of a structure of a digital display and program control module according to an embodiment of the present invention.
In a specific embodiment, the present invention provides a model base 70 dynamic parameter testing system, comprising:
the vibration exciter module is arranged on the model foundation 70 above the foundation 80 to be tested and is used for vibrating according to a preset frequency so as to act on the model foundation 70;
the force detection module is used for detecting the excitation force value of the vibration exciter module;
and the vibration detection module is arranged on the model foundation 70 and is used for measuring the simple harmonic vibration acceleration or speed of the vibration of the model foundation 70 to obtain a vibration displacement value.
The vibration exciter module is preferably an electromagnetic vibration exciter 30, the position of the vibration exciter module on the model foundation 70 is set according to different vibration test types, such as a vertical forced vibration test, a horizontal rotation coupling forced vibration test, a torsion direction forced vibration test and the like, and the directions and positions of the vibration exciters acting on the model foundation 70 are different, so that the vibration forms of the model foundation are different; the vibration sensor 60 is mounted in different directions and positions, and the vibration detection module measures different vibration directions.
The force detection module may be specifically a force sensor 40, and the type of the force sensor 40 may be set as required, so as to measure a dynamic force value of the vibration exciter module acting on the model foundation 70, and send the dynamic force value to the control device 90; the vibration detection module can be set as an acceleration sensor or a velocity sensor, and measures the simple harmonic vibration acceleration or velocity of the vibration of the model base 70, and further calculates the displacement value of the vibration.
The control device 90 is electrically connected to the vibration exciter module, the force detection module and the vibration detection module, respectively. The control device 90 may be a display, a PC, or other control equipment with data calculation and analysis, and controls the vibration exciter module to vibrate at a preset frequency according to a preset test program, and performs data processing on the detection signals sent by the force detection module and the vibration detection module to obtain test data of the model foundation 70. The control device 90 sequentially performs the excitation frequency range and the test frequency detection frequency according to the preset program installation parameter setting, and after the test of a certain frequency point is completed, the control device 90 performs the test of the next frequency point until the test of all the set frequency points is completed. Calculating foundation dynamic parameters including compression resistance, shear resistance, bending resistance and torsional rigidity coefficients of the foundation according to the test data; the damping ratio of the vertical and horizontal return direction to the first vibration mode and the torsion direction and the total mass of the vibration participating in the foundation are obtained. Dynamic parameters of the pile foundation can also be tested, including compressive rigidity of a single pile; shear and torsional stiffness coefficients of the pile foundation; the damping ratio of the vertical and horizontal steering and the torsional steering of the pile foundation and the total mass of the oscillation participating.
By applying the dynamic parameter testing system of the model foundation 70 provided by the invention, the control device 90 is respectively connected with the vibration exciter module, the force detection module and the vibration detection module, the vibration exciter module is controlled to vibrate at a preset frequency according to a preset testing program, and data processing is carried out on detection signals sent by the force detection module and the vibration detection module to obtain testing data of the model foundation 70, the testing process is controlled and completed by the control device 90, the labor intensity of testing personnel is reduced, and the reliability and the testing precision of the testing data are improved.
Specifically, the control device 90 includes:
a central processor 910 connected to the vibration exciter module, the force detection module and the vibration detection module, respectively;
the digital display and program control module 920 connected to the central processing unit 910, the digital display and program control module 920 sends the power parameter testing program and parameter setting instruction to the central processing unit 910, and displays the testing data of the model foundation 70 returned by the central processing unit 910.
The digital display and program control module 920 may be embodied as a display, and the digital display and program control module 920 includes a manual interaction device, such as a keyboard or a touch screen 921, for performing a test procedure and setting parameters. The central processing unit 910 is electrically connected to the digital display and program control module 920, and the central processing unit 910 receives the power parameter test program and parameter setting instruction sent by the digital display and program control module 920, controls the test process, and transmits the test data back to the digital display and program control module 920 for real-time display.
Further, the control device 90 further includes:
the signal generator 930 and the power amplification module 950 are respectively connected with the central processing unit 910, the signal generator 930 is connected with the power amplification module 950, and the power amplification module 950 is connected with the vibration exciter module;
the signal generator 930 receives the instruction from the cpu 910, converts the instruction into a corresponding sine wave signal, and transmits the sine wave signal to the power amplification module 950, and the power amplification module 950 amplifies the sine wave signal and transmits the sine wave signal to the vibration exciter module, so as to excite the vibration exciter module to generate vibration with a corresponding frequency, and act on the model foundation 70. The control device 90 also includes an a-D converter 970 connected to the central processor 910.
Wherein, the central processing unit 910 is further configured to:
and when the real-time excitation force value is smaller than the preset excitation force value, the current amplification factor of the power amplification module 950 is adjusted so that the difference between the real-time excitation force value and the preset excitation force value is within the allowable deviation range.
The central processing unit 910 collects a real-time excitation force value according to a certain frequency, when a difference value between the real-time excitation force value and a parameter preset excitation force value is within an allowable deviation range, a vibration signal of the model foundation 70 is collected and transmitted back to the central processing unit 910, the central processing unit 910 analyzes a vibration waveform, calculates factors such as frequency and amplitude of vibration, and transmits the factors to the digital display and program control module 920 for displaying, meanwhile, the control device 90 further comprises an information storage module 940 which is connected with the central processing unit 910 and used for storing test data, and the central processing unit 910 stores the test data.
In one embodiment, the control device 90 further comprises:
a test data acquisition module 960 connected to the central processor 910, wherein the test data acquisition module 960 is respectively connected to the force detection module and the vibration detection module for acquiring test data.
Generally, the test data acquisition module 960 may be adapted according to the type of the force sensor 40 or the vibration sensor 60, and the test data acquisition module 960 may include a piezoelectric force sensor 40 acquisition module 960, a resistance strain type force sensor 40 acquisition module 960, a piezoelectric acceleration sensor acquisition module 960, a built-in IC piezoelectric acceleration sensor acquisition module 960, a magnetoelectric velocity sensor acquisition module 960, and the like.
In one embodiment, the force detection module is embodied as a force sensor 40, and the force sensor 40 is a piezoelectric force sensor 40 or a resistance strain gauge force sensor 40; the vibration detection module is specifically a piezoelectric acceleration sensor, a built-in IC piezoelectric acceleration sensor or a magnetoelectric speed sensor.
On the basis of the above embodiments, the digital display and program control module 920 includes:
a microprocessor 924 for storing a model base 70 dynamic parameter test program;
a touch screen 921 connected to the microprocessor 924 for test program selection and parameter setting;
an information transcoder 925 connected to the microprocessor 924, the microprocessor 924 being connected to the central processor 910 via the information transcoder 925;
a power control module 922 and a heat sink 923 connected to the microprocessor 924, respectively.
The test programs comprise a vertical forced vibration test program, a horizontal rotation coupling forced vibration test program and a torsional forced vibration test program. The parameter setting comprises time, place, project name, test point number, test type, excitation frequency range selection, test frequency interval, excitation force selection, excitation force tolerance deviation, type and number of force sensors 40, force sensor 40 calibration coefficient, type and number of vibration sensors 60, calibration coefficient of each vibration sensor 60 and the like. By adjusting the tolerance of the exciting force, the accuracy of the exciting force value of the electromagnetic exciter 30 acting on the model base 70 can be controlled, and the overall test accuracy can be improved. The selected test program and parameter settings are input to the central processor 910 through the information transcoder 925, and the central processor 910 controls the power parameter testing process. The touch screen 921 can display in real time the vibration waveform and amplitude of the model foundation 70 measured by the vibration sensor 60 and the force sensor 40, the dynamic excitation force value, the test frequency, the dynamic amplitude-frequency response curve and other test data of the electromagnetic vibration exciter 30 acting on the model foundation 70, and intermediate results.
In a specific embodiment, when the model foundation 70 is subjected to a vertical forced vibration test, firstly, a pre-test foundation is leveled, a layer of fine sand is laid, the prefabricated concrete model foundation 70 with specified size is hoisted to a test site, the front end of the electromagnetic vibration exciter 30 is connected with the steel screw and the force sensor 40, the rear end of the electromagnetic vibration exciter 30 is connected with the counterweight 20, the electromagnetic vibration exciter and the counterweight are hoisted together above the centroid of the model foundation 70, the end of the counterweight 20 is connected to a fixed end above the model foundation 70 through the spring rope 10, the steel screw at the front end of the electromagnetic vibration exciter 30 is aligned to the foundation bolt 50 of the model foundation 70 after the counterweight 20 is stationary, and the steel screw and the. The vibration sensors 60 are arranged on two sides of the upper end face of the model foundation 70, the workbench is arranged on the outer side of the model foundation 70 at a proper distance, the control device 90 is arranged, the input port of the vibration sensor 60, the input port of the force sensor 40 and the output port of the power amplification module 950 of the control device 90 are electrically connected with the corresponding vibration sensor 60, the corresponding force sensor 40 and the corresponding electromagnetic vibration exciter 30, and the power supply input port is electrically connected with a power supply.
And (3) turning on the power supply of the control device 90 and completing preheating, and selecting a test program and setting test parameters through the touch screen 921 of the digital display and program control module 920 according to a preset model base 70 power parameter test scheme. The central processing unit 910 sends instructions to the signal generator 930 and the power amplification module 950 according to the test program and parameters set by the digital display and program control module 920, the signal generator 930 receives the instructions from the central processing unit 910 to generate sine wave signals with set frequency and sends the signals to the power amplification module 950 for amplification, the electromagnetic vibration exciter 30 is excited to generate vibration with corresponding frequency and act on the model foundation 70, the central processing unit 910 collects real-time vibration excitation values according to a certain frequency, when the difference value between the real-time vibration excitation values and the preset parameter vibration excitation values is within an allowable deviation range, vibration signals of the model foundation 70 are collected and transmitted back to the central processing unit 910, and the central processing unit 910 analyzes vibration waveforms, calculates the frequency and amplitude of the vibration and sends the vibration signals to the digital display and program control module 920 for display.
The test is performed according to the selected program, the vibration excitation frequency range and the test frequency interval selected during the parameter setting, and the frequency division rate points are sequentially performed, and after the test of a certain frequency point is completed, the central processing unit 910 sends an instruction to the signal generator 930 to perform the test of the next frequency point until the test of all the set frequency points is completed.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (10)
1. A model based dynamic parameter testing system, comprising:
the vibration exciter module is arranged on the model foundation above the foundation to be tested and is used for vibrating according to a preset frequency so as to act on the model foundation;
the force detection module is used for detecting the excitation force value of the vibration exciter module;
the vibration detection module is arranged on the model base and used for measuring the simple harmonic vibration acceleration or speed of the model base vibration to obtain a vibration displacement value;
and the control device is respectively connected with the vibration exciter module, the force detection module and the vibration detection module, controls the vibration exciter module to vibrate at a preset frequency according to a preset test program, and performs data processing on detection signals sent by the force detection module and the vibration detection module to obtain test data of the model foundation.
2. The model base dynamic parameter testing system of claim 1, wherein the control means comprises:
the central processing unit is respectively connected with the vibration exciter module, the force detection module and the vibration detection module;
and the digital display and program control module is connected with the central processing unit, and sends a power parameter test program and a parameter setting instruction to the central processing unit and displays test data of the model foundation returned by the central processing unit.
3. The model base dynamic parameter testing system of claim 2, wherein the control means further comprises:
the signal generator and the power amplification module are respectively connected with the central processing unit, the signal generator is connected with the power amplification module, and the power amplification module is connected with the vibration exciter module;
the signal generator receives the instruction of the central processing unit, converts the instruction into a corresponding sine wave signal and sends the sine wave signal to the power amplification module, and the power amplification module amplifies the sine wave signal and sends the sine wave signal to the vibration exciter module.
4. The model base dynamic parameter testing system of claim 3, wherein said central processor is further configured to:
and when the real-time excitation force value is smaller than the preset parameter excitation force value, adjusting the current amplification factor of the power amplification module so that the difference value between the real-time excitation force value and the preset parameter excitation force value is within the allowable deviation range.
5. The model base dynamic parameter testing system of claim 4, wherein the control means further comprises:
the test data acquisition module is connected with the central processing unit and is respectively connected with the force detection module and the vibration detection module to acquire test data.
6. The model base dynamic parameter testing system of claim 5, wherein the control means further comprises:
and the information storage module is connected with the central processing unit and used for storing the test data.
7. The model-based dynamic parameter testing system of claim 1, wherein the force detection module is specifically a force sensor, and the force sensor is a piezoelectric force sensor or a resistance strain gauge force sensor.
8. The model base dynamic parameter testing system of claim 1, wherein the vibration detection module is embodied as a piezoelectric acceleration sensor, a built-in IC piezoelectric acceleration sensor, or a magnetoelectric velocity sensor.
9. The model base dynamic parameter testing system of claim 1, wherein the control device is a display or a PC.
10. The model base dynamic parameter testing system of any one of claims 2-9, wherein the digital display and program control module comprises:
the microprocessor is used for storing a model basic dynamic parameter test program;
the touch screen is connected with the microprocessor to select a test program and set parameters;
the information transcoder is connected with the microprocessor, and the microprocessor is connected with the central processing unit through the information transcoder;
and the power supply control module and the radiator are respectively connected with the microprocessor.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113295358A (en) * | 2021-06-29 | 2021-08-24 | 河北中核岩土工程有限责任公司 | Constant disturbance dynamic load test system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113295358A (en) * | 2021-06-29 | 2021-08-24 | 河北中核岩土工程有限责任公司 | Constant disturbance dynamic load test system |
| CN113295358B (en) * | 2021-06-29 | 2023-03-14 | 河北中核岩土工程有限责任公司 | Constant disturbance dynamic load test system |
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