CN113252456B - Variable-angle eccentric loading test device for truss structure - Google Patents
Variable-angle eccentric loading test device for truss structure Download PDFInfo
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- CN113252456B CN113252456B CN202110386700.9A CN202110386700A CN113252456B CN 113252456 B CN113252456 B CN 113252456B CN 202110386700 A CN202110386700 A CN 202110386700A CN 113252456 B CN113252456 B CN 113252456B
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- 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
- G01N3/12—Pressure testing
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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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- G01N2203/0014—Type of force applied
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- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
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- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0044—Pneumatic means
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
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- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
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- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
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- G01N2203/0605—Mechanical indicating, recording or sensing means
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- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
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- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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- G01N2203/02—Details not specific for a particular testing method
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Abstract
The invention relates to a variable-angle eccentric loading test device for a truss structure, which comprises a reaction frame, an angle plate, a force applying device, an adapter part, a pressure measuring part, an adapter plate and an angle adjusting support, wherein the angle plate is provided with an inclined mounting surface, the angle plate can move relative to the reaction frame along the inclined direction of the inclined mounting surface, the force applying device is fixed on the inclined mounting surface, a force applying end of the force applying device is hinged with the adapter part, the adapter part can rotate in the inclined direction of the inclined mounting surface relatively, the pressure measuring part is arranged at the center of the adapter plate, an adapter column of the adapter part is connected with the pressure measuring part, the angle adjusting support comprises a fixed seat and a support seat capable of rotating relative to the fixed seat, the truss structure to be tested is fixed on the support seat, during test, the angle of the force applying device is adjusted through the angle plates with different angles, the horizontal angle of the truss structure to be tested is adjusted through the angle adjusting support seat, the integral structure is simple, the operation is convenient, and the requirement of the variable-angle eccentric loading test for the variable-angle eccentric loading test of the truss structure can be met.
Description
Technical Field
The invention relates to the technical field of test equipment, in particular to a variable-angle eccentric loading test device for a truss structure.
Background
In the eccentric loading test of the truss structure, sometimes the test piece of the truss structure needs to be horizontally rotated to be tested in different horizontal angle states, and sometimes the eccentric loading angle needs to be adjusted to be tested in different unbalance loading states. However, in the prior art, a truss structure eccentric loading test device which can conveniently adjust the horizontal angle and the eccentric loading angle of the truss structure test piece is not found.
Disclosure of Invention
Technical problem to be solved
The invention aims to provide a truss structure variable-angle eccentric loading test device which is simple in structure and convenient to operate.
(II) technical scheme
In order to achieve the above object, the present invention provides a truss structure variable angle eccentric loading test device, comprising:
the reaction frame is of a frame structure;
the angle plate at least comprises an inclined mounting surface, the angle plate is arranged on the reaction frame, an inclined included angle is formed between the inclined mounting surface and the horizontal plane, and the angle plate can move relative to the reaction frame along the inclined direction of the inclined mounting surface;
the force applying device is arranged on the inclined mounting surface, and the axial direction of a force applying end of the force applying device is vertical to the inclined mounting surface;
the adapter comprises an adapter seat and an adapter column, one end of the adapter seat is hinged with the force application end, so that the adapter seat can rotate relative to the force application end in the inclined direction of the inclined mounting surface, and one end of the adapter column is connected with the adapter seat;
the pressure measuring part is arranged at the center of the adapter plate, the adapter column transmits the loading force of the force applying device to the adapter plate through the pressure measuring part, and the pressure measuring part measures the loading force; and
the angular adjustment support, including fixing base and supporting seat, the rotatable setting of supporting seat has the space that is used for placing the truss structure that awaits measuring between keysets and the supporting seat at the fixing base, and the supporting seat can drive the central axis that the truss structure that awaits measuring revolutes the keysets and rotate.
Preferably, the variable-angle eccentric loading test device of the truss structure further comprises a computer, the pressure measurement part is in signal connection with the data acquisition instrument, and the data acquisition instrument is in signal connection with the computer.
Preferably, the truss structure variable-angle eccentric loading test device further comprises a displacement measuring device, the displacement measuring device comprises a central displacement measuring support and a central displacement meter, the central displacement measuring support is not in contact with a force bearing part of the truss structure variable-angle eccentric loading test device, the central displacement meter is arranged on the central displacement measuring support and is positioned on a central axis of the adapter plate, and the central displacement meter is in signal connection with the data acquisition instrument; and/or
The displacement measuring device further comprises a space displacement support, a first space displacement meter, a second space displacement meter and a third space displacement meter, the space displacement support is not in contact with a bearing part of the truss structure variable-angle eccentric loading test device, the first space displacement meter, the second space displacement meter and the third space displacement meter are distributed and arranged according to a Cartesian rectangular coordinate system, the displacement of the truss structure to be measured in the X direction of the Cartesian rectangular coordinate system and the displacement of the Y direction and the Z direction are measured respectively, and the first space displacement meter, the second space displacement meter and the third space displacement meter are in signal connection with the data acquisition instrument.
Preferably, the variable-angle eccentric loading test device of the truss structure further comprises an acoustic emission measuring device, the acoustic emission measuring device comprises a host computer of a full-information acoustic emission analyzer, an acoustic emission signal amplifier and an acoustic emission probe, the acoustic emission probe is distributed and installed at each position of the truss structure to be tested and is in signal connection with the acoustic emission signal amplifier, the acoustic emission signal amplifier is in signal connection with the host computer of the full-information acoustic emission analyzer, and the host computer of the full-information acoustic emission analyzer is in signal connection with a computer.
Preferably, the variable-angle eccentric loading test device of the truss structure further comprises a strain measuring device, the strain measuring device is a high-speed camera and is arranged on the outer side of the truss structure to be measured, the measuring range of the strain measuring device covers the truss structure to be measured and is used for measuring the full-field strain of the truss structure to be measured, and the high-speed camera is in signal connection with a computer.
Preferably, the variable-angle eccentric loading test device for the truss structure further comprises a camera, wherein the camera is arranged on the outer side of the truss structure to be tested, and a shooting visual angle covers the truss structure to be tested and is used for collecting a macro test phenomenon of the truss structure to be tested in the test process.
Preferably, the angle plate is installed on the reaction frame through the installation top plate, the installation top plate is provided with an installation long hole, the angle plate is fixed with the installation top plate through the matching of the bolt and the installation long hole, and the relative position of the angle plate and the installation top plate can be adjusted through the installation long hole, so that the loading force of the force applying device is applied to the central position of the adapter plate.
Preferably, one end of the adapter far away from the force application device is provided with a connecting hole, one end of the adapter is inserted into the connecting hole to be connected with the adapter, and the adapter can rotate relatively.
Preferably, the pressure measurement portion is spoke formula pressure sensor, and the one end that the adapter is kept away from to the switching post has the external screw thread, through the screw threaded connection at external screw thread and spoke formula pressure sensor center.
Preferably, the at least lower part of supporting seat is an annular cylinder structure, the upper end of fixing base is equipped with the ring channel matched with the annular structure, the lower extreme card of supporting seat is located in the ring channel, the supporting seat can rotate relative to the fixing base in the ring channel, fixing base and reaction frame fixed connection.
Preferably, the at least lower part of supporting seat is an annular cylinder structure, the upper end of fixing base is equipped with annular structure assorted ring channel, the lower extreme card of supporting seat is located in the ring channel, the both sides wall of ring channel is equipped with the ball, the ball of both sides respectively with the inner wall and the outer wall contact of an annular cylinder, and the ball can rotate by relative ring channel, the supporting seat can rotate by relative fixing base in the ring channel, fixing base and reaction frame fixed connection.
Preferably, be equipped with at least one spacing portion on the fixing base, spacing portion includes spacing seat and with spacing seat screw-thread fit's limiting screw, rotatory limiting screw can support tight supporting seat with limiting screw, make supporting seat and fixing base relatively fixed.
Preferably, still be equipped with angle scale mark on the fixing base, the outside of supporting seat is equipped with the instruction arrow head, and instruction arrow head constitutes angle instruction portion jointly with angle scale mark.
(III) advantageous effects
The technical scheme of the invention has the following advantages: the invention provides a variable-angle eccentric loading test device for a truss structure, which comprises a reaction frame, an angle plate, a force application device, a switching part, a pressure measurement part, a switching plate and an angle adjustment support, wherein the angle plate is at least provided with an inclined mounting surface, the angle plate can move relative to the reaction frame along the inclined direction of the inclined mounting surface, the force application device is fixed on the inclined mounting surface, a force application end of the force application device is hinged with the switching part, the switching part can rotate in the inclined direction of the inclined mounting surface relatively, the pressure measurement part is mounted in the center of the switching plate, a switching column of the switching part is connected with the pressure measurement part, the angle adjustment support comprises a fixed seat and a support seat capable of rotating relative to the fixed seat, the truss structure to be tested is fixed on the support seat, the support seat can drive the truss structure to be tested to rotate around the central axis of the switching plate, during test, the eccentric loading angle is adjusted through the angle plates with different angles, the horizontal angle of the truss structure to be tested is adjusted through the angle adjustment support seat, the overall structure is simple in structure and convenient to operate, and can meet the requirement of the variable-angle eccentric loading test for the truss structure.
Drawings
The drawings of the present invention are provided for illustrative purposes only, and the proportion and the number of the components in the drawings do not necessarily correspond to those of an actual product.
FIG. 1 is a schematic structural diagram of a variable-angle eccentric loading test device of a truss structure in an embodiment of the invention;
FIG. 2 is a schematic structural diagram of a main body part of a variable-angle eccentric loading test device of a truss structure in an embodiment of the invention;
FIG. 3 is a schematic structural diagram of an adapter and a hinge thereof according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a connection between a truss structure to be measured and a force application device and a sounding measurement device according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a displacement measuring device according to an embodiment of the present invention;
FIG. 6 is an enlarged schematic view of section A of FIG. 5;
FIG. 7 is a schematic top view of a fixing base according to an embodiment of the present invention;
FIG. 8 is a schematic half-sectional view of an angle adjustment support structure according to an embodiment of the present invention;
FIG. 9 is a schematic half-sectional view of another angle adjustment mount structure according to an embodiment of the present invention.
In the figure: 1: a reaction frame; 2: an angle plate; 3: a force applying device; 4: a switching part; 41: a transfer seat; 42: a transfer column; 5: a pressure measuring section; 6: a patch panel;
7: an angle adjusting support; 71: a fixed seat; 711: an annular groove; 72: a supporting seat; 721: supporting the toe board; 722: a support rib plate; 73: a ball bearing; 74: a limiting part; 741: a limiting seat; 742: a limit screw;
8: a data acquisition instrument; 9: a computer;
10: a displacement measuring device; 101: a central displacement measuring support; 102: a center displacement meter; 103: a spatial displacement support; 104: a first spatial displacement meter; 105: a second spatial displacement meter; 106: a third spatial displacement meter;
11: an acoustic emission measurement device; 111: a main machine of the full information acoustic emission analyzer; 112: an acoustic emission signal amplifier; 113: an acoustic emission probe;
12: a strain measuring device; 13: a camera; 14: installing a top plate; 15: a stress application controller;
100: and (5) a truss structure to be tested.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Referring to fig. 1, the test device for variable-angle eccentric loading of the truss structure provided by the embodiment of the invention comprises a reaction frame 1, an angle plate 2, a force application device 3, an adapter part 4, a pressure measurement part 5, an adapter plate 6 and an angle adjustment support 7.
Referring to fig. 1 and 2, the reaction frame 1 is a frame structure and may be formed by welding h-shaped steel. The lower side surface of the angle plate 2 is an inclined mounting surface, the angle plate 2 is mounted at the top of the reaction frame 1, an inclined angle is formed between the inclined mounting surface and the horizontal plane after mounting, the inclined mounting surfaces with different angles can be manufactured according to test requirements, the inclined angle between the inclined mounting surface and the horizontal plane meets the test requirements, for example, the inclined angle can be 15 degrees, 20 degrees, 30 degrees, 40 degrees, 45 degrees and the like, the specific inclined angle can be selected according to the test, and the method is not limited herein. The angle plate 2 is provided with a mounting long hole or the reaction frame 1 is provided with a mounting long hole, so that the angle plate 2 can move relative to the reaction frame 1 along the inclined direction of the inclined mounting surface, and the force application part of the force application device 3 is ensured to be positioned at the central position of the adapter plate 6.
In order to adapt to the reaction frame 1 with the top also in a frame structure and facilitate the angle plate 2 to move along the inclined direction of the inclined installation surface, in some preferred embodiments, as shown in fig. 1 and fig. 2, the angle plate 2 is installed on the reaction frame 1 through an installation top plate 14, the installation top plate 14 is fixedly installed at the lower side of the top of the reaction frame 1, an installation long hole is formed in the installation top plate 14, the angle plate 2 realizes the fixing and the relative movement of the angle plate 2 and the installation top plate 14 through the matching of a bolt and the installation long hole, and the loading force of the force applying device 3 is applied to the central position of the adapter plate 6.
Referring to fig. 1 and 2, the force applying device 3 is mounted on the inclined mounting surface, and the axial direction of the force applying end of the force applying device is perpendicular to the inclined mounting surface. In a particular embodiment, the force means 3 is a jack, to which a force controller 15 may be connected for controlling the operation of the jack. Of course, in other embodiments, the force applying device 3 may be a hydraulic cylinder device or a pneumatic cylinder device.
Referring to fig. 1 to 3, the adaptor 4 includes an adaptor base 41 and an adaptor post 42, one end of the adaptor base 41 is hinged to the force application end, so that the adaptor base 41 can rotate relative to the force application end in the inclined direction of the inclined mounting surface, and one end of the adaptor post 42 is connected to the adaptor base 41. In some embodiments, the adapter 41 may be directly hinged to the force application end of the force application device 3, or a U-shaped connector may be fixed to the force application end of the force application device 3, and the adapter 41 is hinged to the U-shaped connector.
Referring to fig. 1, 2 and 4, the pressure measurement portion 5 is disposed at the center of the adapter plate 6, the adapter column 42 transmits the loading force of the force applying device 3 to the adapter plate 6 through the pressure measurement portion 5, and the pressure measurement portion 3 measures the actual loading force of the truss structure 100 to be measured. In a preferred embodiment, the pressure measuring part 3 is a spoke type pressure sensor and is fixed at the center position of the adapter plate 6, and one end of the adapter column 42, which is far away from the adapter base 41, is provided with an external thread which is in threaded connection with a screw hole at the center of the spoke type pressure sensor.
Referring to fig. 1, fig. 2, fig. 7 and fig. 8, angle adjustment support 7 includes fixing base 71 and supporting seat 72, wherein, the rotatable setting of supporting seat 72 is at fixing base 71, the space that is used for placing truss structure 100 that awaits measuring has between keysets 6 and supporting seat 72, truss structure 100 that awaits measuring is fixed on supporting seat 72, supporting seat 72 can drive truss structure 100 that awaits measuring and revolutes the central axis rotation of keysets 6, thereby realize the change of truss structure 100 horizontal angle that awaits measuring (rotate along clockwise or anticlockwise on the horizontal plane), satisfy the experimental requirement that becomes truss structure 100 horizontal angle that awaits measuring. Wherein, preferably, the fixed seat 71 is fixedly connected with the reaction frame 1.
During the experiment, the eccentric loading angle is adjusted through the angle plates 2 with different angles, the horizontal angle of the truss structure 100 to be tested is adjusted through the angle adjusting support 7, the whole structure is simple, the operation is convenient, and the requirement of the variable-angle eccentric loading test of the truss structure can be met.
In some preferred embodiments, a connecting hole (not shown in the drawings) is formed in one end of the adapter 41, which is away from the force-applying device 3, and one end of the adapter column 42 is inserted into the connecting hole to be rotatably connected with the adapter 41, so that when the horizontal angle of the truss structure 100 to be tested is adjusted, the adjustment can be directly performed without detaching the truss structure 100 to be tested and the adapter plate 6, and then adjusting the horizontal angle of the truss structure to be tested, thereby improving the test efficiency.
In some preferred embodiments, referring to fig. 7 and 8, at least the lower portion of the supporting seat 72 is an annular cylinder structure, the upper end of the fixing seat 71 is provided with an annular groove 711 matching with the annular cylinder structure, the lower end of the supporting seat 72 is clamped in the annular groove 711, and the supporting seat 72 can rotate relative to the fixing seat 71 in the annular groove 711. Preferably, the supporting base 72 is an annular cylinder structure, and a plurality of supporting footsteps 721 are arranged on the upper portion of the supporting base along the circumferential direction, and are used for fixing the truss structure 100 to be measured, and the supporting base can be fixed by bolts. More preferably, a support rib 722 is provided on the outer side of the support base 72 for supporting the support footing plate 721. The number of the supporting footsteps 721 depends on the structure of the truss structure 100 to be measured, and may be three, four, six, etc., for example, and is not limited herein. Of course, in some other embodiments, the supporting seat 72 and the fixing seat 71 may also be two plate-shaped structures connected by a rotating shaft, and the two plate-shaped structures can rotate relatively, which is not described herein again.
In order to reduce the rotational friction, in another embodiment, as shown in fig. 9, balls 73 are disposed on both side walls of the annular groove 711, the balls 73 on both sides are respectively in contact with the inner wall and the outer wall of the annular cylinder, and the balls 73 can rotate relative to the fixed seat 71, so that the supporting seat 72 is in rolling friction during rotation, thereby reducing the friction force. In some embodiments, annular ball receiving grooves may be provided on both sidewalls of the annular groove 711 for receiving the balls 73, and the balls 73 may roll in the ball receiving grooves; a plurality of individual ball receiving grooves may be provided at intervals in the circumferential direction, one ball 73 being provided in each ball receiving groove, and the balls 73 can roll with respect to the ball receiving grooves.
In some preferred embodiments, referring to fig. 9, at least one limiting portion 74 is disposed on the fixing base, the limiting portion 74 includes a limiting seat 741 and a limiting screw 742 in threaded engagement with the limiting seat 741, the limiting screw 742 can be rotated to adjust a distance between the limiting screw 742 and the supporting seat 72, the limiting screw 742 is rotated to abut against the supporting seat 72, so as to prevent the supporting seat 72 from rotating relative to the fixing base 71, and when rotation is required, the limiting screw 742 is rotated in a reverse direction, so that the limiting screw 742 does not contact the supporting seat 72, and at this time, the supporting seat 72 can be rotated. The number of the limiting portions 74 may be one, two, three, four, etc., for example, four limiting portions 74 are disposed on the upper side surface of the fixing seat 71 and located inside the ring of the annular groove 711 (i.e., the limiting portions are operated on the inner side of the supporting seat), and the four limiting portions 74 are uniformly distributed in the circumferential direction and are used for limiting the supporting seat 72 to rotate relative to the fixing seat 71 when necessary. Of course, in other embodiments, the limiting portion 74 may also be disposed on the upper side surface of the fixing seat 71 and located outside the ring of the annular groove 711, that is, the limiting portion 74 is operated outside the supporting seat 72, which is not limited herein.
In some preferred embodiments, the contact end of the limit screw 742 with the support seat 72 may be provided in an arc shape to achieve better contact with the support seat 72. More preferably, a friction increasing design such as a ridge is provided on the contact end surface of the limit screw 742 and the support seat 72.
In order to determine the rotation angle of the supporting seat 72 conveniently, in some preferred embodiments, an angle scale mark (not shown in the figure) is further provided on the fixing seat 71, and an indicating arrow (not shown in the figure) is provided on the outer side of the supporting seat 72, and the indicating arrow and the angle scale mark jointly form an angle indicating portion for determining the rotation angle of the supporting seat 72 (the truss structure to be measured rotates synchronously with the supporting seat 72). Of course, it should be understood by those skilled in the art that in other embodiments, the angle scale lines may be disposed on the outer periphery of the lower end of the supporting seat 72, and the indication arrow is disposed on the fixing seat 71, which is not limited herein.
In some preferred embodiments, referring to fig. 1, the truss structure variable-angle eccentric loading test device further includes a computer 9, the pressure measurement unit 3 is in signal connection with a data acquisition instrument 8, and the data acquisition instrument 8 is in signal connection with the computer 9, and is used for transmitting pressure data acquired by the pressure measurement unit 3 to the computer 9, so as to facilitate data acquisition.
In some preferred embodiments, referring to fig. 1, 5 and 6, the truss structure variable-angle eccentric loading test apparatus further includes a displacement measurement apparatus 10, where the displacement measurement apparatus 10 includes a central displacement measurement support 101 and a central displacement meter 102, the central displacement meter 102 is disposed on the central displacement measurement support 101 and is located on the central axis of the adapter plate 6, and is used to measure the displacement of the center of the loading surface of the truss structure 100 to be measured, and the central displacement meter 102 is in signal connection with the data acquisition instrument 8, and transmits the measured data to the computer 9 through the data acquisition instrument 8. The central displacement measurement support 101 is not in contact with a force bearing part of the truss structure variable-angle eccentric loading test device, namely the central displacement measurement support 101 is an independent support and is not in contact with force application or force transmission parts such as the reaction frame 1 and the adapter plate 6, so that deformation of the central displacement measurement support 101 caused by stress is avoided, and displacement measurement precision is influenced.
In order to measure and collect the spatial displacement of a certain position of the truss structure 100 to be measured in the test process, in some preferred embodiments, the displacement measurement device 10 further includes a spatial displacement support 103, a first spatial displacement meter 104, a second spatial displacement meter 105, and a third spatial displacement meter 106, where the spatial displacement support 103 is not in contact with a force bearing part of the truss structure variable-angle eccentric loading test device, that is, the spatial displacement support 103 is an independent support and is not in contact with a force application or force transmission part such as the reaction frame 1 and the adapter plate 6, so as to avoid deformation of the spatial displacement support 103 due to force application, thereby affecting displacement measurement accuracy. The first space displacement meter 104, the second space displacement meter 105 and the third space displacement meter 106 are distributed according to a cartesian rectangular coordinate system, and respectively measure the displacement (space displacement) of a specified point (measured point) of the truss structure 100 to be measured in the X direction, the Y direction and the Z direction of the cartesian rectangular coordinate system, and the first space displacement meter 104, the second space displacement meter 105 and the third space displacement meter 106 are in signal connection with the data acquisition instrument 8.
In order to monitor the internal crack change of the truss structure to be measured, in some preferred embodiments, referring to fig. 1 and 4, the variable-angle eccentric loading test device for the truss structure further includes an acoustic emission measurement device 11, where the acoustic emission measurement device 11 includes a main machine 111 of a full information acoustic emission analyzer, an acoustic emission signal amplifier 112, and an acoustic emission probe 113, the acoustic emission probe 113 is directly installed at each position of the truss structure to be measured 100 (each acoustic emission probe 113 is installed at the main body of the truss structure to be measured 100), so as to cover a measurement range over the whole truss structure to be measured 100, for example, a plurality of acoustic emission probes 113 are installed at the top end, the bottom feet, and the middle positions of each load-bearing pipe of the truss structure to be measured 100, each probe 113 is in signal connection with the acoustic emission signal amplifier 112, the acoustic emission signal amplifier 112 is in signal connection with the main machine 111 of the full information acoustic emission analyzer, and the main machine 111 of the full information acoustic emission analyzer is in signal connection with the computer 9.
In order to measure the full-field strain of the truss structure 100 to be measured, in some preferred embodiments, referring to fig. 1, the truss structure variable-angle eccentric loading test apparatus further includes a strain measurement apparatus 12, in one embodiment, the strain measurement apparatus is a high-speed camera for collecting images, where the high-speed camera is set at a suitable position on one side of the truss structure to be measured or a plurality of high-speed cameras are distributed around the truss structure 100 to be measured, a measurement range covers the truss structure 100 to be measured and is used for measuring the full-field strain of the truss structure 100 to be measured, the strain measurement apparatus 12 is in signal connection with the computer 9, the strain measurement method is a three-dimensional Digital Image Correlation (abbreviated as DIC), and the measurement method itself is the prior art and will not be described herein again.
Of course, in other embodiments, the strain measurement may be performed by disposing a strain gauge on the truss structure 100 to be measured.
In order to record the macro test phenomenon during the test, in some preferred embodiments, referring to fig. 1, the frame structure variable-angle eccentric loading test apparatus further includes a camera 13, the camera 13 is disposed at an outer side of the truss structure 100 to be tested, and a shooting view covers the truss structure 100 to be tested, so as to collect the macro test phenomenon during the test of the truss structure 100 to be tested. The camera 13 may store images in its own storage device or may be in signal communication with the computer 9 for transmission to the computer 9.
It should be noted that, in the present invention, the central displacement meter, the spatial displacement meter, the host of the full-information acoustic emission analyzer, the acoustic emission signal amplifier, the acoustic emission probe, the high-speed camera and the video camera are all existing devices, and are not described herein again.
It should be further noted that the strain measuring device and the camera may be supported and fixed by an existing support structure such as a tripod, and details are not described herein.
It should be noted that the signal connection in the present invention may be a wireless connection or a connection through a transmission line.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: each embodiment does not include only one independent technical solution, and in the case of no conflict between the solutions, the technical features mentioned in the respective embodiments can be combined in any way to form other embodiments which can be understood by those skilled in the art.
Furthermore, modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof, without departing from the scope of the present invention, and the essence of the corresponding technical solutions may not be deviated from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. The utility model provides a truss structure becomes eccentric loading test device of angle which characterized in that includes:
the reaction frame is of a frame structure;
the angle plate at least comprises an inclined mounting surface, the angle plate is arranged on the reaction frame, an inclined included angle is formed between the inclined mounting surface and a horizontal plane, and the angle plate can move relative to the reaction frame along the inclined direction of the inclined mounting surface;
the force applying device is arranged on the inclined mounting surface, and the axial direction of a force applying end of the force applying device is vertical to the inclined mounting surface;
the adapter comprises an adapter seat and an adapter column, one end of the adapter seat is hinged with the force application end, so that the adapter seat can rotate relative to the force application end in the inclined direction of the inclined mounting surface, and one end of the adapter column is connected with the adapter seat;
one end of the adapter is far away from the force applying device and is provided with a connecting hole, one end of the adapter column is inserted into the connecting hole and is connected with the adapter, and the adapter column and the adapter can rotate relatively;
the pressure measuring part is arranged at the center of the adapter plate, the adapter column transmits the loading force of the force applying device to the adapter plate through the pressure measuring part, the pressure measuring part measures the loading force, the pressure measuring part is a spoke type pressure sensor, and one end of the adapter column, which is far away from the adapter seat, is provided with an external thread and is in threaded connection with a screw hole in the center of the spoke type pressure sensor through the external thread; and
the angle adjusting support comprises a fixed seat and a supporting seat, the supporting seat is rotatably arranged on the fixed seat, a space for placing a truss structure to be tested is formed between the adapter plate and the supporting seat, and the supporting seat can drive the truss structure to be tested to rotate around the central axis of the adapter plate;
at least the lower part of the supporting seat is of an annular cylinder structure, the upper end of the fixed seat is provided with an annular groove matched with the annular cylinder structure, the lower end of the supporting seat is clamped in the annular groove, the supporting seat can rotate relative to the fixed seat in the annular groove, and the fixed seat is fixedly connected with the reaction frame; or
At least the lower part of the supporting seat is of an annular cylinder structure, the upper end of the fixing seat is provided with an annular groove matched with the annular cylinder structure, the lower end of the supporting seat is clamped in the annular groove, two side walls of the annular groove are provided with balls, the balls positioned on two sides are respectively contacted with the inner wall and the outer wall of the annular cylinder, the balls can rotate relative to the fixing seat, the supporting seat can rotate relative to the fixing seat in the annular groove, and the fixing seat is fixedly connected with the reaction frame;
the fixing seat is provided with at least one limiting part, the limiting part comprises a limiting seat and a limiting screw rod in threaded fit with the limiting seat, and the limiting screw rod can be rotated to tightly support the limiting screw rod on the supporting seat, so that the supporting seat is relatively fixed on the fixing seat.
2. The variable-angle eccentric loading test device for the truss structure according to claim 1, wherein: the pressure measuring part is in signal connection with a data acquisition instrument, and the data acquisition instrument is in signal connection with the computer.
3. The truss structure variable-angle eccentric loading test device according to claim 2, wherein: the device comprises a truss structure variable-angle eccentric loading test device, and is characterized by further comprising a displacement measurement device, wherein the displacement measurement device comprises a central displacement measurement support and a central displacement meter, the central displacement measurement support is not in contact with a force bearing part of the truss structure variable-angle eccentric loading test device, the central displacement meter is arranged on the central displacement measurement support and is positioned on a central axis of the adapter plate, and the central displacement meter is in signal connection with the data acquisition instrument; and/or
The displacement measuring device further comprises a space displacement support, a first space displacement meter, a second space displacement meter and a third space displacement meter, wherein the space displacement support is not in contact with a bearing part of the truss structure variable-angle eccentric loading test device, the first space displacement meter, the second space displacement meter and the third space displacement meter are distributed and arranged according to a Cartesian rectangular coordinate system and are respectively used for measuring displacement of the truss structure to be measured in the X direction, the Y direction and the Z direction of the Cartesian rectangular coordinate system, and the first space displacement meter, the second space displacement meter and the third space displacement meter are all in signal connection with the data acquisition instrument.
4. The truss structure variable-angle eccentric loading test device according to claim 2, wherein: the acoustic emission measurement device comprises a host computer of a full-information acoustic emission analyzer, an acoustic emission signal amplifier and an acoustic emission probe, wherein the acoustic emission probe is distributed and installed at each position of the truss structure to be measured and is in signal connection with the acoustic emission signal amplifier, the acoustic emission signal amplifier is in signal connection with the host computer of the full-information acoustic emission analyzer, and the host computer of the full-information acoustic emission analyzer is in signal connection with the computer.
5. The truss structure variable-angle eccentric loading test device according to claim 2, wherein: the strain measurement device is a high-speed camera, is arranged on the outer side of the truss structure to be measured, covers the truss structure to be measured in a measurement range and is used for measuring the full-field strain of the truss structure to be measured, and is in signal connection with the computer; or
The device comprises a truss structure to be tested and a camera, wherein the camera is arranged on the outer side of the truss structure to be tested, and a shooting visual angle covers the truss structure to be tested and is used for collecting the macro test phenomenon of the truss structure to be tested in the test process.
6. The angle-variable eccentric loading test device for the truss structure according to claim 1, wherein: the angle board is installed through the installation roof on the reaction frame, be equipped with the installation slot hole on the installation roof, the angle board pass through the bolt with the cooperation of installation slot hole is realized the angle board with the fixing of installation roof, and can pass through the installation slot hole is adjusted the angle board with the relative position of installation roof makes thrust augmentation device's loading force acts on the central point of keysets puts.
7. The angle-variable eccentric loading test device for the truss structure according to claim 1, wherein: still be equipped with angle scale mark on the fixing base, the outside of supporting seat is equipped with the instruction arrow point, the instruction arrow point with angle scale mark constitutes angle instruction portion jointly.
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