CN115060480A - Universal damping device test platform and control system - Google Patents
Universal damping device test platform and control system Download PDFInfo
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Abstract
The invention discloses a universal damping device test platform and a control system, which comprise a static test area, a dynamic test area and a damping wall test area; the static test area and the dynamic test area share one set of structure system, and the structure system comprises four round steel columns, static actuators and dynamic actuators at the end heads of two sides, and a horizontal moving beam; one side of each round steel column is connected with the base through a damping test frame to form a damping wall test area together. Force sensors and strain sensors are respectively arranged on the actuator and the round steel column to acquire the force on the actuator and the deformation of the round steel column, the force on the actuator is inversely calculated through displacement compensation, and the force on the actuator and the force sensor on the actuator are checked. The dynamic and static tests can be accurately controlled. The novel universal damping device test platform provided by the invention can be used for carrying out static tests, dynamic tests and damping wall tests, can also be expanded into a one-way vibrating table for carrying out earthquake simulation vibrating table tests, and is a comprehensive damping test device.
Description
Technical Field
The invention is mainly applied to the field of civil engineering, and mainly aims at a structural energy dissipation, shock absorption and shock isolation device and a damping device test platform and a control system of various structural components.
Background
At present, the conventional damping test device has a complex structure and a single function, and cannot perform accurate damping test. In order to meet the requirements of high-speed development and large-scale application of energy dissipation, shock absorption and shock isolation, the test equipment is required to be suitable for various energy dissipation and shock absorption products with different sizes, different tonnages and different types. Meanwhile, the volume and the weight of the damping test device are required to be reduced so as to reduce the construction cost.
(1) The loading principle of the conventional damping test device is shown in fig. 1.
The parallelogram loading test equipment is mainly used for carrying out mechanical property tests on members such as concrete beams, concrete structure frames, walls, steel structure trusses and the like, and can also be used for carrying out column type, beam type, truss type, frame type and node type tests. The system can realize a parallel four-bar loading test and can realize vertical loading active zero-friction follow-up. The horizontal power of doing is applyed through horizontal actuator, promotes the removal of vertical travelling beam to drive the vibration of test piece. Due to the existence of friction, the horizontal force sensor is generally integrated on a horizontal actuator, the force on the horizontal actuator comprises the horizontal force and the friction force acting on the test piece, and the force acting on the test piece can be slightly changed.
(2) The loading principle of the "research-type" damping test device is shown in fig. 2.
The 'construction and research type-reaction frame' is mainly used for detecting damping wall members, and the main components of the test frame system comprise four vertical frames, a lifting suspension hook, a horizontal control frame, a movable beam and the like. The actuator can be adjusted horizontally so as to be horizontal to the reverse bending point of the test piece for loading, the horizontal control frame controls the horizontal movement of the test piece, and the system relatively meets the functional requirements of the damping test platform. But the whole device has a complex structure, is suitable for a dynamic loading test and does not meet the requirements of the damping test device.
As shown in fig. 3, most of the conventional testing devices adopt sliding motions of test pieces arranged in a sliding rail manner, and a structure of a testing platform of a "bidirectional sliding rail type" damping device is proposed on the basis of the above-mentioned structure of the damping testing platform. Under the ideal state, rely on the adjustment of hydro-cylinder try in fact the height, exert the standard that the horizontal force can be more superior satisfies novel general damping device test platform through the actuator, nevertheless the condition that vertical slide rail card is dunked can appear in the actual test process, therefore this structural design scheme still needs further perfection.
The damping device test platform and the control system are complex:
a damper: a damper is a device installed in a building for absorbing and dissipating energy of structural vibrations (mainly including structural vibrations caused by wind, earthquakes, moving loads, power equipment, and the like).
The working principle of the damping device test platform is as follows: the damping device test is to test the damping performance of the damping device under the action of simulating an earthquake. The general method is to place the test piece between loading platforms, push the vertical moving beam or sliding table to horizontally load the test piece by keeping the vertical direction fixed, test the load-displacement curve and the damage form, and analyze the vibration damping performance.
Disclosure of Invention
The invention provides a universal damping device test platform and a universal damping device control system, which aim to solve the problems of complex structure and single function of the existing damping device test device and realize accurate control under complex working conditions.
The technical scheme adopted by the invention is as follows: a universal damping device test platform comprises a static test area, a dynamic test area and a damping wall test area;
the static test area and the dynamic test area share one set of structure system, and the structure system comprises four round steel columns, a static actuator and a dynamic actuator at the end heads of two sides and a horizontal moving beam;
adjusting the horizontal moving beam to freely move on the four round steel columns so as to meet the requirements of test pieces with different sizes; after the test piece is installed, the horizontal moving beam is fixed on the four round steel columns, horizontal static loading is realized through the static actuator installed on the front support, a static test area is formed, and the BRB is subjected to static test; the dynamic actuator arranged on the rear support pushes the test piece and provides a horizontal load, a dynamic test area is formed together, and the cylindrical damper is tested;
one side of each round steel column is connected with the base through a damping test frame to form a damping wall test area; the damping test frame is connected with the triangular supports.
The damping wall test area comprises a sliding table, a sliding block, a vertical moving beam and an oil cylinder, the damping wall test area and the dynamic test area share a double-rod dynamic actuator, the dynamic actuator and the sliding table are assembled and connected into a whole through a pre-tightening device, the sliding table is provided with the sliding block at the bottom, meanwhile, a sliding rail is arranged on a damping test frame, the sliding block is arranged in the sliding rail, and the dynamic actuator pushes the sliding table to horizontally slide; vertical, horizontal hydro-cylinder are arranged respectively between vertical movable cross beam and the damping test frame, realize vertical regulation of vertical movable cross beam promptly and fix with the level, prevent the horizontal slope of test piece in the testing process, be the loading space of test piece between slip table and the vertical movable cross beam, also realize the multi-functional requirement of shaking table test in addition, when not needing, the test of cylinder attenuator is just carried out to disconnection dynamic actuator and connection between the slip table, convenient operation, laborsaving.
Preferably, when the damping wall is horizontally loaded, the vertical moving beam of the traditional device inevitably moves up and down, so that the oil cylinders are symmetrically arranged on the vertical moving beam, so that the whole vertical moving beam can be adjusted up and down horizontally, and cannot turn over.
The traditional damping device test platform control system is not high in precision and cannot accurately control the test.
Above-mentioned general damping device test platform control system, symmetrical combination frame system can ignore other ascending power in direction basically under the effect of horizontal axis force, nevertheless because the length of four round steel posts is great, the installation of test piece probably leads to eccentric load to produce, inevitable during the deformation, the event should be divided the deformation condition of section monitoring round steel post, carries out accurate measurement control to the frame system.
Because the dynamic and static test area shares the horizontal moving beam, the arrangement of the strain sensors in the middle positions of the four round steel columns is obviously inappropriate, so that the strain sensors are respectively arranged at the root parts of the two sides of the four round steel columns corresponding to the static and dynamic test areas, and the axial strain of the four round steel columns is respectively obtainedAnd 4, numerical values of the whole axial force of the four round steel columns are obtained, and the force numerical values acting on the test piece can be obtained through back calculation through displacement compensation due to the fact that the test piece and the four round steel columns have relative displacement. And meanwhile, force sensors are arranged on the static actuator and the dynamic actuator, so that the numerical value of the force sensor can be checked in real time and the numerical value on the test piece obtained through inverse calculation can be checked. When the test piece is subjected to eccentric load, the numerical value of the force on the four round steel columns can be accurately calculated according to the sensor, and M is equal to (F) 1 -F 2 ) The delta d can accurately calculate the eccentric load borne by the test piece, and correct the axis of the test piece, or else apply the accurate eccentric load to the test piece according to the test requirement. In addition, the safety of the structural system can be accurately reflected through checking.
Strain sensors are arranged on the four round steel columns, and if only the force on the test piece is measured, the number of various sensors can be reduced by more than half. In the invention, the various force sensors are high-precision force sensors, and besides the force values are directly obtained through the force sensors, as mentioned above, in order to measure the horizontal supporting counter force of the horizontal frame, the invention largely adopts strain sensors and obtains the horizontal force on the actuator through a calculation and analysis mode.
In general, the accuracy of the strain sensor can be up to 1 μ ε, but this is not a determining factor for the frame level force. In addition to this, it is also relevant to the size of the round steel column. According to the horizontal force that the round steel post should bear, its size can reach more than 300mm, and the round steel post diameter is big more, and the horizontal force precision that final calculation obtained is lower. When the size of the round steel column is fixed, the precision can be improved by increasing the distance between the left and right strain sensors in order to improve the precision of the horizontal force. Generally, the distance between the left strain sensor and the right strain sensor can reach more than 1000mm, and then the strain precision is further improved in a proper bridge connection mode, so that the measurement precision of the horizontal force is enabled to be less than 20kN, and the horizontal loading force on a test piece can reach more than 4000kN, so that the precision of the horizontal force of the whole frame is extremely high.
In conclusion, through a series of guarantee measures, the force measurement accuracy of the test platform is limited by various adopted force sensors, so that the force accuracy of the test platform reaches 0.5% FS or higher.
The test platform can accurately acquire the force on the test piece, and can take the force on the test piece as a control parameter to control the horizontal loading of the test piece by force.
Preferably, the damping device test platform control system further comprises a self-calibration function:
self-calibration is a method in which the forces on the test piece are checked against one another by means of their own sensors. The method comprises the following concrete steps:
before a test piece is loaded on the damping device test platform, the static actuator and the dynamic actuator are directly loaded on the horizontal moving beam, zero calibration is carried out, the forces of the four round steel columns and the forces of the static actuator and the dynamic actuator are respectively obtained to form self calibration, deformation data under different working conditions are recorded and serve as original data to be stored.
During testing, initial original data are directly called to carry out displacement compensation, and testing of damping devices such as BRB (British brake Broker) and cylinder type dampers is more accurate within a preset elastic working range of a damping device testing platform.
The invention has the beneficial effects that:
1. in order to solve the problems of complex structure and single function of the existing damper test device, the novel universal damping device test platform provided by the invention can be used for carrying out static test, dynamic test and damping wall test, can also be expanded into a one-way vibration table for carrying out earthquake simulation vibration table test, and is a comprehensive damping test device.
2. The damping device test platform provided by the invention adopts reasonable structural arrangement, and the development cost of the damping device test platform is reduced and the material utilization rate is improved by sharing main parts such as the round steel column, the horizontal movable balance beam, the double-rod-out actuator and the like.
3. Aiming at the problem of insufficient control precision of the traditional damping device test platform, the damping device test platform control system provided by the invention can accurately control the test and can also accurately reflect the safety of a structural system.
Drawings
FIG. 1 is a schematic diagram of a conventional damping test device;
FIG. 2 is a schematic diagram of a "research-type" damping test device;
FIG. 3 is a schematic view of a test platform of a "two-way slide rail type" damping device;
FIG. 4 is a schematic view of a testing platform for the damping device of the present invention;
FIG. 5 is a perspective view of FIG. 4;
FIG. 6 is a layout of strain sensors on four round steel columns of the present invention (static test zone);
FIG. 7 is a layout diagram (dynamic test zone) of strain sensors on four round steel columns according to the present invention;
fig. 8 is a schematic view of the remote control of the damping device testing platform according to the present invention.
The reference numbers in the figures illustrate: 1. round steel columns; 2. a static actuator; 3. a dynamic actuator; 4. horizontally moving the beam; 5. a front support; 6. a rear support; 7. a damping test frame; 8. an oil cylinder; 9. vertically moving the beam; 10. a test piece; 11. a sliding table; 12. a slider; 13. a triangular support; 14. a strain sensor.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings.
As shown in fig. 4-8, a universal damping device test platform includes a static test area, a dynamic test area and a damping wall test area;
the static test area and the dynamic test area share one set of structure system, and the structure system comprises four round steel columns 1, static actuators 2 and dynamic actuators 3 at two side ends and a horizontal moving beam 4;
adjusting the horizontal moving beam 4 to freely move on the four round steel columns 1 so as to meet the requirements of test pieces with different sizes; after a test piece is installed, fixing a horizontal moving beam 4 on four round steel columns 1, realizing horizontal static loading through a static actuator 2 installed on a front support 5 to form a static test area, and performing static test on BRB; the dynamic actuator 3 arranged on the rear support 6 pushes the test piece and provides horizontal load to jointly form a dynamic test area, and the cylindrical damper is tested;
one side of each of the four round steel columns 1 is connected with the base through a damping test frame 7 to form a damping wall test area;
the damping wall test area comprises a sliding table 11, a sliding block 12, a vertical moving beam 9 and an oil cylinder 8, the damping wall test area and the dynamic test area share a double-rod dynamic actuator 3, the dynamic actuator 3 and the sliding table 11 are assembled and connected into a whole through a pre-tightening device, the sliding table 11 is provided with the sliding block 12 at the bottom, meanwhile, a sliding rail is arranged on a damping test frame 7, the sliding block 12 is arranged in the sliding rail, and the dynamic actuator 3 pushes the sliding table 11 to horizontally slide; vertical, horizontal hydro-cylinder 8 are arranged respectively between vertical movable cross beam 9 and the damping test frame 7, realize vertical movable cross beam 9 vertical regulation promptly and level fixed, prevent the horizontal slope of test piece in the testing process, be the loading space of test piece 10 between slip table 11 and the vertical movable cross beam 9, also realize the multi-functional requirement of shaking table test in addition, when not needing, the test of cylinder attenuator is just carried out in the connection between disconnection dynamic actuator 3 and the slip table 11.
The oil cylinders 8 are symmetrically arranged on the vertical moving beam 9, so that the whole vertical moving beam 9 can be horizontally adjusted up and down and cannot turn over. The damping test frame 7 is connected with a triangular support 13.
The control system of the universal damping device test platform is characterized in that strain sensors 14 are respectively arranged at the root parts of the two sides of the four round steel columns 1 corresponding to the static test area and the dynamic test area, the axial strains of the four round steel columns 1 are respectively obtained, the numerical values of the whole axial forces of the four round steel columns 1 are converted through a stress-strain formula, and the numerical values of the forces acting on the test piece are inversely calculated through displacement compensation due to the relative displacement of the test piece and the four round steel columns 1; meanwhile, force sensors are arranged on the static actuator 2 and the dynamic actuator 3, and the numerical value of the force sensors and the numerical value on the test piece obtained through inverse calculation are checked in real time; when the test piece is subjected to eccentric load, the numerical value of the force on the four round steel columns 1 is accurately calculated according to the sensor, and M is equal to (F) 1 -F 2 ) And the delta d can accurately calculate the eccentric load borne by the test piece, correct the axis of the test piece, and apply the accurate eccentric load to the test piece according to the test requirement.
Example (b):
the universal damping device test platform mainly comprises a test platform main body, an energy accumulator, an oil source and a controller. The energy accumulator and the oil source are mature industrial components, provide power for the testing platform to test the machine, and are configured according to needs. Since these two parts are not the focus of the description herein, they will not be described in detail herein.
The controller mainly collects key data of the main body part of the test platform and controls the horizontal actuator of the controller to load the test piece, and the loading mode can be force control loading or displacement control loading or mixed loading of the force control loading and the displacement control loading and switching of the force control loading and the displacement control loading. One of the main test objects of the damping device test platform of the present example is a damping wall. Generally, the horizontal load loading of the damping wall varies from hundreds of tons according to the size. Typically, the actual force exerted by the actuator is typically greater than the horizontal force experienced on the damping wall due to the frictional forces present in horizontal loading. In this case, the controller needs to control the horizontal actuator to apply a horizontal reciprocating load to the damping wall and record corresponding force and displacement data.
The main technical indexes of the example are as follows:
1) horizontal static loading is 800 tons at most;
2) the maximum horizontal dynamic loading is 400 tons;
3) the maximum pressure resistance of the actuator cylinder body is as follows: 42Mpa and 28Mpa working pressure;
4) loading a space: 8500mm × 1500mm
Examples of applications of static tests
This example is a static pull-lay test, which is configured with only an oil source and no accumulator assembly, since no high demands are made on the loading speed of the horizontal actuator. The oil source in this example is 300L/min, 28MPa constant pressure oil source.
Wherein the four round steel columns are round steel columns with the diameter of 200mm and the length of 15000 mm; the testable space is 1500mm multiplied by 1500mm, the thickness of the supports at the two ends is 40mm, the testable space is formed by integral casting, and through holes are arranged at four corners of the testable space and are used for installing the upright posts and the actuators; the movable balance beam is also integrally poured, precision machining is carried out after aging treatment, the test space is adjusted through the front and back movement of the guide device, the hydraulic clamping cylinder carries out clamping action after moving in place, the clamping cylinder is tightly held, the movable cross beam is locked on the prestressed round steel column under the action of the hydraulic clamping cylinder, and a loading framework is formed by the movable cross beam, the front cross beam, the rear cross beam and the frames on the two sides to bear horizontal loading force.
Examples of applications of the dynamic test
The damping device testing platform is required to be dynamically loaded in the embodiment, so that the configuration requirement of the oil supply system is high, the oil source is 800L/min, the constant-pressure oil source is 28MPa, and the instantaneous oil supply capacity of the energy accumulator is 5000L/min. As shown in fig. 5, the detailed dimensions are not marked therein, wherein the height of the damping frame upright is 4000mm, the total length of the vertical movable beam is 4000mm, the total width is 400mm, the damping frame upright is integrally cast, the upper plate and the lower plate are 40mm, the middle part is provided with a radial strong rib plate, and a through hole is arranged at the position corresponding to the oil cylinder and used for installing the oil cylinder; the structure of the sliding table is similar to that of the vertical movable beam, the total length of the platform is 800mm, the height and the width of the platform are both 400mm, and the platform is formed by integrally pouring process holes. The sliding rail is mounted on the surface of the damping frame base and used for mounting the sliding table to meet the requirement of horizontal sliding of the sliding table, and the triangular supports are arranged on two sides of the damping frame and used for providing horizontal rigidity for the whole test. And the upper parts of the left and right tripods are prolonged so as to further improve the integral horizontal rigidity of the damping device test platform.
The horizontal actuator adopts a double-rod actuator, and in the embodiment, the horizontal actuator is pre-tightened with the sliding table in order to fully utilize the actuator. At the moment, the damping device test platform has the test capability of a large horizontal tensile test machine.
And respectively carrying out analog loading on the horizontal moving beam without the test piece loaded through zero calibration before test loading, and acquiring and storing original deformation data.
As a static test, the BRB test is mainly performed, a test piece is installed between an actuator and a horizontal moving beam, a horizontal load is applied, and a load-displacement curve and a failure form of the test piece are tested. The dynamic test area mainly tests the cylinder type damper, and the principle is consistent with that of a static test.
It should be noted that modifications and adaptations may occur to those skilled in the art without departing from the principles of the present invention and should be considered within the scope of the present invention.
Claims (5)
1. The utility model provides a general damping device test platform which characterized in that: the damping wall test device comprises a static test area, a dynamic test area and a damping wall test area;
the static test area and the dynamic test area share one set of structure system, and the structure system comprises four round steel columns (1), static actuators (2) and dynamic actuators (3) at the end heads of two sides and a horizontal moving beam (4);
adjusting the horizontal moving beam (4) to freely move on the four round steel columns (1) so as to meet the requirements of test pieces with different sizes; after a test piece is installed, a horizontal moving beam (4) is fixed on four round steel columns (1), horizontal static loading is realized through a static actuator (2) installed on a front support (5), a static test area is formed, and a BRB is subjected to static test; a dynamic actuator (3) arranged on the rear support (6) pushes a test piece and provides a horizontal load to jointly form a dynamic test area, and the cylindrical damper is tested;
one side of each round steel column (1) is connected with the base through a damping test frame (7) to form a damping wall test area; the damping test frame (7) is connected with the triangular supports (13);
the damping wall testing area comprises a sliding table (11), a sliding block (12), a vertical movable cross beam (9) and an oil cylinder (8), the damping wall testing area and the dynamic testing area share a double-rod dynamic actuator (3), the dynamic actuator (3) and the sliding table (11) are assembled and connected into a whole through a pre-tightening device, the sliding table (11) is provided with the sliding block (12) at the bottom, meanwhile, a sliding rail is arranged on a damping testing frame (7), the sliding block (12) is arranged in the sliding rail, and the dynamic actuator (3) pushes the sliding table (11) to horizontally slide; arrange vertical, horizontal hydro-cylinder (8) respectively between vertical movable cross beam (9) and damping test frame (7), realize vertical movable cross beam (9) vertical regulation promptly and fix with the level, prevent the horizontal slope of test piece in the testing process, be the loading space of test piece (10) between slip table (11) and vertical movable cross beam (9), also realize the multi-functional requirement of shaking table test in addition, when not needing, the test of cylinder attenuator is just carried out in the connection between disconnection dynamic actuator (3) and slip table (11).
2. The universal damping device test platform according to claim 1, wherein: the oil cylinders (8) are symmetrically arranged on the vertical moving beam (9) so as to ensure that the whole vertical moving beam (9) can be horizontally adjusted up and down and cannot be overturned.
3. The control system of a universal damping device test platform according to claim 1 or 2, wherein: strain sensors are respectively arranged at the root parts of the two sides of the four round steel columns (1) corresponding to the static test area and the dynamic test area, the axial strains of the four round steel columns are respectively obtained, the numerical value of the whole axial force of the four round steel columns (1) is converted through a stress-strain formula, and the numerical value of the force acting on the test piece is inversely calculated through displacement compensation due to the relative displacement of the test piece and the four round steel columns (1); meanwhile, force sensors are arranged on the static actuator (2) and the dynamic actuator (3), and the numerical value of the force sensor and the numerical value on the test piece obtained through inverse calculation are checked in real time; when the test piece is subjected to eccentric load, the numerical value of the force on the four round steel columns (1) is accurately calculated according to the sensor, and M is equal to (F) 1 -F 2 ) And d, accurately calculating the eccentric load borne by the test piece, correcting the axis of the test piece, and applying the accurate eccentric load to the test piece according to the test requirement.
4. The control system for a universal damping device test platform according to claim 3, wherein: the force sensors are high-precision force sensors, the precision of the strain sensors reaches 1 mu epsilon, and the distance between the strain sensors reaches more than 1000 mm.
5. The control system for a universal damping device test platform according to claim 3, wherein: the damping device test platform control system also comprises a self-calibration function, namely a method for mutually calibrating the force on a test piece through various sensors, and the method comprises the following concrete implementation steps:
before a test piece is loaded on a damping device test platform, a static actuator and a dynamic actuator are directly loaded on a horizontal moving beam, zero calibration is carried out, the forces of four round steel columns and the forces of the static actuator and the dynamic actuator are respectively obtained to form self calibration, deformation data under different working conditions are recorded and stored as original data;
during testing, initial original data are directly called to carry out displacement compensation, and testing of damping devices such as BRB (British brake Broker) and cylinder type dampers is more accurate within a preset elastic working range of a damping device testing platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210680797.9A CN115060480A (en) | 2022-06-15 | 2022-06-15 | Universal damping device test platform and control system |
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| CN202210680797.9A CN115060480A (en) | 2022-06-15 | 2022-06-15 | Universal damping device test platform and control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117330271A (en) * | 2023-10-30 | 2024-01-02 | 中铁建电气化局集团轨道交通器材有限公司 | Device and method for testing vibration performance of elastic damping positioning wire clamp configuration |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117330271A (en) * | 2023-10-30 | 2024-01-02 | 中铁建电气化局集团轨道交通器材有限公司 | Device and method for testing vibration performance of elastic damping positioning wire clamp configuration |
| CN117330271B (en) * | 2023-10-30 | 2024-03-05 | 中铁建电气化局集团轨道交通器材有限公司 | Device and method for testing vibration performance of elastic damping positioning wire clamp configuration |
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