CN108269462B - Small-size assembled structural dynamics teaching experiment table - Google Patents
Small-size assembled structural dynamics teaching experiment table Download PDFInfo
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- CN108269462B CN108269462B CN201810063768.1A CN201810063768A CN108269462B CN 108269462 B CN108269462 B CN 108269462B CN 201810063768 A CN201810063768 A CN 201810063768A CN 108269462 B CN108269462 B CN 108269462B
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Abstract
The invention provides a small-sized assembly type structural dynamics teaching experiment table, and belongs to the field of teaching aids. The experiment table integrates the functions of a plurality of experiment tables, and comprises an experiment table base, a leveling support, an excitation system, a connecting shaft, a vibrating table, a multi-layer frame structure, a counter-force wall, a truss structure, a support column, a beam, a simply supported beam restraining device, a cantilever beam restraining device and bolts. When different experiments are carried out, corresponding experimental accessories are selected for assembly, and the experimental platform can respectively form an earthquake simulation vibration experiment table, a frame structure forced vibration experiment table, a truss structure forced vibration experiment table, a simple beam forced vibration experiment table and a cantilever beam forced vibration experiment table.
Description
Technical Field
The invention relates to the technical field of teaching aids, in particular to a small-sized assembled structural dynamics teaching experiment table.
Background
In the past, structural dynamics is an important professional basic course in the civil engineering field, has stronger theories, and part of theories are very abstract and obscure, so that students are difficult to understand, at present, many universities are provided with mechanical experiment courses, but mainly use mechanical experiment equipment of materials and theoretical mechanics, the experimental equipment related to structural dynamics is relatively deficient, the traditional structural dynamics experiment equipment is mainly large-scale equipment, the type of equipment has important significance for scientific research, but is difficult to serve for classroom teaching, so that research and development are mainly conducted, and meanwhile, the small-sized structural dynamics experiment equipment meeting the requirements of the scientific research is a problem to be solved. Aiming at the problem, the invention provides a small-sized assembly type structural dynamics teaching experiment table which integrates the functions of a plurality of experiment tables into a whole by adopting an assembly concept, can rapidly perform various structural dynamics experiments, and solves the problem of lack of structural dynamics experiment equipment to a certain extent.
Disclosure of Invention
The invention provides a small-sized assembled structural dynamics teaching experiment table.
The experiment table comprises an experiment table base, an excitation system, a vibrating table, a multi-layer frame structure, a counter-force wall, a truss structure, a support column, a beam, a simply supported beam restraining device and a cantilever beam restraining device, wherein the experiment table is assembled with different accessories to respectively form a simulated earthquake vibration experiment table, a frame structure forced vibration experiment table, a truss structure forced vibration experiment table, a simply supported beam forced vibration experiment table and a cantilever beam forced vibration experiment table.
Wherein, simulation earthquake vibration laboratory bench includes laboratory bench base, excitation system, shaking table and multilayer frame construction, and wherein the laboratory bench base is located the bottom of simulation earthquake vibration laboratory bench, and vibration exciter support, shaking table and multilayer frame construction pass through locating hole A to be fixed in laboratory bench base top, and the vibration exciter support is located the tip of laboratory bench base, and the shaking table passes through the connecting axle and links to each other with the vibration exciter, and the support is fixed on the laboratory bench base, and multilayer frame construction passes through locating hole B to be fixed on the mesa of shaking table.
The frame structure forced vibration experiment table comprises an experiment table base, an excitation system, a counter-force wall and a multi-layer frame structure, wherein the experiment table base is located at the bottom of the frame structure forced vibration experiment table, the counter-force wall and the multi-layer frame structure are fixed on the experiment table base through positioning holes A, the counter-force wall is fixed at the end part of the experiment table base, the counter-force wall is perpendicular to the experiment table base and parallel to the short side of the experiment table base, the vibration exciter support is mounted on the front surface of the counter-force wall, and the multi-layer frame structure is laterally connected with a horizontal vibration exciter through a connecting shaft.
The truss structure forced vibration experiment table comprises an experiment table base, an excitation system, support columns and a truss structure, wherein the experiment table base is located at the bottom of the truss structure forced vibration experiment table, the excitation system and the support columns are fixed on the experiment table base through positioning holes A, the truss structure is located at the top ends of the support columns on two sides, an overhanging plate of the truss structure is fixed at the top ends of the support columns, the excitation system is located between the two support columns, the distance between the two support columns is identical to the length of the truss structure, and the vibration exciter is connected with the bottom of the truss structure through a connecting shaft.
The simple beam forced vibration experiment table comprises an experiment table base, an excitation system, a beam, a simple beam restraint device and support columns, wherein the experiment table base is located at the bottom of the simple beam forced vibration experiment table, the support columns and the excitation system are fixed on the experiment table base through positioning holes A, two support columns are located at two sides of the experiment table base respectively, the distance between the two support columns is identical to the length of the beam, the simple beam restraint device is fixed at the tops of the support columns, the beam is built on the two support columns through the simple beam restraint device, the beam, the simple beam restraint device and the support columns form the simple beam system, the excitation system is located between the two support columns, and the vibration exciter is connected with the bottom of the beam through a connecting shaft.
The cantilever beam forced vibration experiment table comprises an experiment table base, an excitation system, a support column, a beam and a cantilever beam constraint device, wherein the experiment table base is positioned at the bottom of the cantilever beam forced vibration experiment table, the support column and the excitation system are fixed on the experiment table base through positioning holes A, the end part of the beam is fixed at the top end of the support column through the cantilever beam constraint device, the beam, the cantilever beam constraint device and the support column form the cantilever beam system, the excitation system is positioned below the other end part of the beam, and the vibration exciter is connected with the bottom of the beam through a connecting shaft.
The experiment table base, the counter-force wall and the vibrating table of the experiment table are all provided with positioning holes, and the vibration excitation system, the multi-layer frame structure, the truss structure, the support columns and the beams are provided with positioning bolt holes matched with the positioning holes.
The experiment table base of the experiment table comprises leveling supports and positioning holes A, wherein the positioning holes A are uniformly distributed on the experiment table base, and the leveling supports are distributed below four corners of the experiment table base; the vibration excitation system comprises a vibration exciter support, a vibration exciter and a connecting shaft, wherein the axial direction of the vibration exciter and the plane of the vibration exciter support are 0-180 degrees; the simple beam restraining device comprises a U-shaped bolt, an arc-shaped bulge structure, a bolt A, a step and a connecting bottom plate A, wherein the connecting bottom plate A is positioned at the bottom of the simple beam restraining device, the length of the connecting bottom plate A is larger than the section length of a support column, the arc-shaped bulge structure is positioned at the center above the connecting bottom plate A, the length of the arc-shaped bulge structure is identical to the width of a beam, steps are machined on two sides of the arc-shaped bulge structure, the height of the steps is 1/5-1/2 of the height of the beam, the connecting bottom plate A is fixed with other accessories through the bolt A, the U-shaped bolt is positioned at the outer side of the steps, and the U-shaped bolt and the arc-shaped bulge structure clamp the beam together; the cantilever beam restraint device comprises a pressing plate, a connecting bottom plate B, a clamping groove, countersunk bolts and bolts B, wherein the pressing plate is fixed above the connecting bottom plate B through the bolts B, a clamping groove is formed in a gap between the pressing plate and the connecting bottom plate B, the countersunk bolts are positioned in the clamping groove and penetrate through the connecting bottom plate B, countersunk depth of countersunk bolt holes in the connecting bottom plate B is larger than the height of bolt heads of the bolts B, and the connecting bottom plate B and the pressing plate jointly clamp the beam; extending overhanging plates from two ends of the truss structure; the vibrating table comprises a sliding bar, positioning holes B, a bracket, a handle and a table top, wherein the table top is connected with the bracket through the sliding bar, the handle is positioned at two sides of the bracket, and the positioning holes B are uniformly distributed on the table top; the counter-force wall is "L" type, and the counter-force wall includes stiffening rib and counter-force wall body, and the stiffening rib is located the side of counter-force wall body.
The assembling method of the experiment table comprises the following steps:
s1: placing the experiment table base on an experiment field, and primarily leveling the experiment table base through a leveling support;
s2: the assembly experiment table is assembled by selecting corresponding experiment table accessories according to different experiment requirements to form a simulated earthquake vibration experiment table or a frame structure forced vibration experiment table or a truss structure forced vibration experiment table or a simple beam forced vibration experiment table or a cantilever beam forced vibration experiment table;
s3: and (3) leveling the experiment table again through the leveling support after the secondary leveling and the S1 and the S2 are completed.
The bench base and the table top of the vibrating table can be provided with a building model.
The technical scheme of the invention has the following beneficial effects:
1. the experiment table base, the counter-force wall and the vibration table of the experiment table are provided with the positioning holes, so that the experiment table has the advantages of rapid assembly and disassembly and is simple to operate;
2. the experiment table integrates the functions of a plurality of experiment tables and has the advantages of multifunction and multiple purposes;
3. the experiment table is small in size, adopts an assembly mode, and is characterized in that a plurality of experiments share one experiment table base and an excitation system, so that the laboratory space is saved to a large extent, and the cost of experimental equipment is reduced.
Drawings
FIG. 1 is a schematic view of a main fitting of a small-sized fabricated structural dynamics teaching experiment table of the present invention;
FIG. 2 is a schematic diagram of a simulated seismic vibration laboratory bench according to the present invention;
FIG. 3 is a schematic diagram of a frame structure forced vibration laboratory table of the present invention;
FIG. 4 is a schematic diagram of the structure of the forced vibration laboratory table of the truss structure of the present invention;
FIG. 5 is a schematic diagram of the forced vibration laboratory table of the simply supported beam of the present invention;
FIG. 6 is a schematic structural view of a simply supported beam restraint device of the present invention
FIG. 7 is a schematic diagram of the structure of the forced vibration laboratory table of the cantilever beam of the present invention;
fig. 8 is a schematic structural view of the cantilever beam restraining device of the present invention.
Wherein: the device comprises a 1-experiment table base, a 2-excitation system, a 3-simple beam restraint device, a 4-cantilever beam restraint device, a 5-truss structure, a 6-vibration table, a 7-counter-force wall, an 8-multi-layer frame structure, 9-support columns, 10-beams, a 101-leveling support, 102-positioning holes A, 201-excitation support seats, 202-excitation devices, 203-connecting shafts, 301-U-shaped bolts, 302-arc-shaped protruding structures, 303-bolts A, 304-steps, 305-connecting bottom plates A, 401-pressing plates, 402-connecting bottom plates B, 403-clamping grooves, 404-countersunk bolts, 405-bolts B, 501-overhanging plates, 601-sliding strips, 602-positioning holes B, 603-supports, 604-handles, 605-table tops 701-reinforcing ribs and 702-counter-force walls.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved more apparent, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
The invention provides a small-sized assembled structural dynamics teaching experiment table.
As shown in fig. 1, the experiment table comprises an experiment table base 1, an excitation system 2, a vibrating table 6, a multi-layer frame structure 8, a counter-force wall 7, a truss structure 5, support columns 9, beams 10, a simple beam restraint device 3 and a cantilever beam restraint device 4, wherein the experiment table respectively forms an earthquake simulation vibration experiment table, a frame structure forced vibration experiment table, a truss structure forced vibration experiment table, a simple beam forced vibration experiment table and a cantilever beam forced vibration experiment table by assembling different accessories.
Wherein, as shown in fig. 2, the simulated earthquake vibration experiment table includes experiment table base 1, excitation system 2, shaking table 6 and multilayer frame structure 8, wherein experiment table base 1 is located the bottom of simulated earthquake vibration experiment table, vibration exciter support 201, shaking table 6 and multilayer frame structure 8 are fixed in experiment table base 1 top through locating hole a102, vibration exciter support 201 is located the tip at experiment table base 1, shaking table 6 links to each other with vibration exciter 202 through connecting axle 203, support 603 is fixed on experiment table base, multilayer frame structure 8 passes through locating hole B602 to be fixed on the mesa 605 of earthquake vibration table 6.
As shown in fig. 3, the forced vibration experiment table with the frame structure comprises an experiment table base 1, an excitation system 2, a counter-force wall 7 and a multi-layer frame structure 8, wherein the experiment table base 1 is positioned at the bottom of the forced vibration experiment table with the frame structure, the counter-force wall 7 and the multi-layer frame structure 8 are fixed on the experiment table base 1 through positioning holes a102, the counter-force wall 7 is fixed at the end part of the experiment table base 1, the counter-force wall 702 is vertical to the experiment table base 1 and parallel to the short side of the experiment table base 1, an exciter support 201 is arranged on the front surface of the counter-force wall 702, and the multi-layer frame structure 8 is laterally connected with a horizontal exciter 202 through a connecting shaft 203.
As shown in fig. 4, the truss structure forced vibration experiment table comprises an experiment table base 1, an excitation system 2, support columns 9 and a truss structure 5, wherein the experiment table base 1 is located at the bottom of the truss structure forced vibration experiment table, the excitation system 2 and the support columns 9 are fixed on the experiment table base 1 through positioning holes a102, the truss structure 5 is located at the top ends of the support columns 9 on two sides, an overhanging plate 501 of the truss structure 5 is fixed at the top ends of the support columns, the excitation system 2 is located between the two support columns 9, the distance between the two support columns 9 is identical to that of the truss structure 5, and an exciter 202 is connected with the bottom of the truss structure 5 through a connecting shaft 203.
As shown in fig. 5, the forced vibration experiment table of the simply supported beam comprises an experiment table base 1, an excitation system 2, a beam 10, a constraint device 3 of the simply supported beam and a support column 9, wherein the experiment table base 1 is positioned at the bottom of the forced vibration experiment table of the simply supported beam, the support column 9 and the excitation system 2 are fixed on the experiment table base 1 through positioning holes a102, two support columns 9 are respectively positioned at two sides of the experiment table base 1, the distance between the two support columns 9 is identical to the length of the beam 10, the constraint device 3 of the simply supported beam is fixed at the top of the support column 9, the beam 10 is built on the two support columns 9 through the constraint device 3 of the simply supported beam, the beam 10, the constraint device 3 of the simply supported beam and the support column 9 form the simply supported beam system, the excitation system 2 is positioned between the two support columns 9, and an exciter 202 is connected with the bottom of the beam 10 through a connecting shaft 203.
As shown in fig. 7, the cantilever forced vibration experiment table comprises an experiment table base 1, an excitation system 2, a support column 9, a beam 10 and a cantilever restraint device 4, wherein the experiment table base 1 is positioned at the bottom of the cantilever forced vibration experiment table, the support column 9 and the excitation system 2 are fixed on the experiment table base 1 through a positioning hole a102, the end part of the beam 10 is fixed at the top end of the support column 9 through the cantilever restraint device 4, the beam 10, the cantilever restraint device 4 and the support column 9 form a cantilever system, the excitation system 2 is positioned below the other end part of the beam 10, and the vibration exciter 202 is connected with the bottom of the beam 10 through a connecting shaft 203.
Positioning holes are formed in the experiment table base 1, the counter-force wall 7 and the vibration table 6 of the experiment table, and positioning bolt holes matched with the positioning holes are formed in the excitation system 2, the multi-layer frame structure 8, the truss structure 5, the support columns 9 and the beams 10.
The experiment table base 1 of the experiment table comprises leveling supports 101 and positioning holes A102, wherein the positioning holes A102 are uniformly distributed on the experiment table base 1, and the leveling supports 101 are distributed below four corners of the experiment table base 1; the vibration excitation system 2 comprises a vibration exciter support 201, a vibration exciter 202 and a connecting shaft 203, wherein the axial direction of the vibration exciter 202 and the plane of the vibration exciter support 201 form 0-180 degrees; as shown in fig. 6, the simply supported beam restraining device 3 comprises a U-shaped bolt 301, an arc-shaped protruding structure 302, a bolt a303, a step 304 and a connecting bottom plate a305, wherein the connecting bottom plate a305 is positioned at the bottom of the simply supported beam restraining device 3, the length of the connecting bottom plate a305 is larger than the section length of a supporting column 9, the arc-shaped protruding structure 302 is positioned at the center above the connecting bottom plate a305, the length of the arc-shaped protruding structure 302 is the same as the width of a beam 10, the steps 304 are machined on two sides of the arc-shaped protruding structure 302, the height of the steps 304 is 1/5-1/2 of the height of the beam 10, the connecting bottom plate a305 is fixed with other accessories through the bolt a303, the U-shaped bolt 301 is positioned at the outer side of the steps 304, and the U-shaped bolt 301 and the arc-shaped protruding structure 302 clamp the beam 10 together; as shown in fig. 8, the cantilever beam restraining device 4 comprises a pressing plate 401, a connecting bottom plate B402, a clamping groove 403, a countersunk bolt 404 and a bolt B405, wherein the pressing plate 401 is fixed above the connecting bottom plate B402 through the bolt B405, the clamping groove 403 is formed by a gap between the pressing plate 401 and the connecting bottom plate B402, the countersunk bolt 404 is positioned in the clamping groove 403 and penetrates through the connecting bottom plate B402, the countersunk depth of the countersunk bolt hole on the connecting bottom plate B402 is larger than the height of the bolt head of the bolt B405, and the connecting bottom plate B402 and the pressing plate 401 jointly act on the clamping beam 10; two of the truss structures 5 extend beyond the overhanging plates 501; the vibrating table 6 comprises a slide bar 601, positioning holes B602, a support 603, a handle 604 and a table top 605, wherein the table top 605 is connected with the support 603 through the slide bar 601, the handle 604 is positioned on two sides of the support 603, and the positioning holes B602 are uniformly distributed on the table top 605; the reaction wall 7 is "L" shaped, and the reaction wall 7 includes a reinforcing rib 701 and a reaction wall body 702, and the reinforcing rib 701 is located on a side surface of the reaction wall body 702.
The assembling method of the experiment table comprises the following steps:
s1: the method comprises the steps of (1) primarily leveling, placing a laboratory table base 1 on an experimental field, and primarily leveling the laboratory table base 1 through a leveling support 101;
s2: the assembly experiment table is assembled by selecting corresponding experiment table accessories according to different experiment requirements to form a simulated earthquake vibration experiment table or a frame structure forced vibration experiment table or a truss structure forced vibration experiment table or a simple beam forced vibration experiment table or a cantilever beam forced vibration experiment table;
s3: after the secondary leveling, S1 and S2 are completed, the experiment table is leveled again through the leveling support 101.
The concrete installation mode of the experiment table is as follows:
1. the bench base 1 is first placed in place and the bench base 1 is adjusted to be completely horizontal by means of the leveling support 101.
2. Simulating the assembly modes of a seismic vibration experiment table, a frame structure forced vibration experiment table, a truss structure forced vibration experiment table, a simple support beam forced vibration experiment table and a cantilever beam forced vibration experiment table:
2.1, assembling a simulated earthquake experiment table, as shown in fig. 2, firstly, installing a vibration exciter support 201 on an experiment table base 1, rotating a vibration exciter 202 to be parallel to the surface of the experiment table base 1 and fixing the vibration exciter, then lifting a vibration table 6 to the experiment table base 1 through a handle 604, fixing a bracket 603 on the experiment table base 1 through bolts, pushing a table 605 to a position convenient for installing a connecting shaft 203 under the action of a sliding bar 601, after connection is completed, placing a multi-layer frame structure 8 in the center of the table 605, enabling bolt holes of a bottom plate of the multi-layer frame structure 8 to correspond to positioning holes B602 on the table 605, and finally fixing the multi-layer frame structure 8.
2.2, the assembly of the forced vibration experiment table of the frame structure, as shown in fig. 3, firstly, the counterforce wall 7 is installed on the experiment table base 1, then the vibration excitation system 2 is installed on the front surface of the counterforce wall 7, the installation height of the counterforce wall 7 is determined according to the multi-layer frame structure 8, the position of the vibration exciter 202 is adjusted, the vibration exciter 202 is axially parallel to the experiment table base 1, then the multi-layer frame structure 8 is placed on the experiment table base 1, the bolt holes on the bottom plate of the multi-layer frame structure 8 correspond to the positioning holes A102 on the experiment table base 1, the bolts are used for fastening, and finally, the vibration exciter 202 and the multi-layer frame structure 8 are connected through the connecting shaft 203.
2.3, assembling a truss structure forced vibration experiment table, as shown in fig. 4, firstly, installing two support columns 9 on an experiment table base 1, wherein the installation distance between the two support columns 9 is the same as the length of the truss structure 5, then overlapping the truss structure 5 on the top ends of the two support columns 9 through overhanging plates 501 at two ends, fastening by bolts, installing an excitation system 2 between the two support columns 9, adjusting an exciter 202 to be vertical, and then connecting with the bottom of the truss structure 5 through a connecting shaft 203.
2.4, assembly of a simple beam forced vibration experiment table, as shown in fig. 5, firstly, two support columns 9 are mounted on an experiment table base 1, the mounting distance between the two support columns 9 is the same as the length of a beam 10, then, a connecting bottom plate 305 of the two simple beam restraint devices 3 shown in fig. 6 is respectively fixed to the top ends of the support columns 9 through bolts A303, then, the beam 10 is put on two arc-shaped protruding structures 302, steps 304 are arranged on two sides of each arc-shaped protruding structure 302 to just clamp the beam 10, the beam 10 is hooped and fastened through a round hole of the bottom plate by using a U-shaped bolt 301, an excitation system 2 is mounted between the two support columns 9, an exciter 202 is adjusted to be vertically upwards and fixed, and finally, the exciter 202 is connected with the bottom of the beam 10 through a connecting shaft 203.
2.5, assembling the cantilever forced vibration experiment table, as shown in fig. 7, firstly, installing a support column 9 at one end of the experiment table base 1, then fixing a connecting bottom plate B402 of the cantilever beam restraint device 4 shown in fig. 8 to the top end of the support column 9 through a countersunk bolt 404, clamping a beam 10 through a clamping groove 403 of a pressing plate 401, fastening the beam by a bolt B405, then installing an excitation system 2 below the other end of the beam 10, enabling an exciter 202 to vertically upwards and fixedly, and finally connecting the exciter with the bottom of the beam 10 through a connecting shaft 203.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.
Claims (3)
1. A small-size assembled structural dynamics teaching experiment table, its characterized in that: the experimental bench comprises an experimental bench base (1), an excitation system (2), a vibrating bench (6), a multi-layer frame structure (8), a counterforce wall (7), a truss structure (5), a support column (9), a beam (10), a simply supported beam restraint device (3) and a cantilever beam restraint device (4), wherein the experimental bench respectively forms an experimental bench for simulating earthquake vibration, an experimental bench for forcing vibration of the frame structure, an experimental bench for forcing vibration of the truss structure, an experimental bench for forcing vibration of the simply supported beam and an experimental bench for forcing vibration of the cantilever beam by assembling different accessories;
the experiment table base (1) comprises leveling supports (101) and positioning holes A (102), the positioning holes A (102) are uniformly distributed on the experiment table base (1), and the leveling supports (101) are distributed below four corners of the experiment table base (1); the vibration excitation system (2) comprises a vibration exciter support (201), a vibration exciter (202) and a connecting shaft (203), wherein the axial direction of the vibration exciter (202) and the plane of the vibration exciter support (201) form 0-180 degrees; the simple beam restraining device (3) comprises a U-shaped bolt (301), an arc-shaped protruding structure (302), a bolt A (303), a step (304) and a connecting bottom plate A (305), wherein the connecting bottom plate A (305) is positioned at the bottom of the simple beam restraining device (3), the length of the connecting bottom plate A (305) is larger than the section length of a supporting column (9), the arc-shaped protruding structure (302) is positioned at the center above the connecting bottom plate A (305), the length of the arc-shaped protruding structure (302) is the same as the width of a beam (10), the steps (304) are machined on two sides of the arc-shaped protruding structure (302), the height of the steps (304) is 1/5-1/2 of the height of the beam (10), the connecting bottom plate A (305) is fixed through the bolt A (303), the U-shaped bolt (301) is positioned at the outer side of the steps (304), and the U-shaped bolt (301) and the arc-shaped protruding structure (302) clamp the beam (10) together; the cantilever beam restraint device (4) comprises a pressing plate (401), a connecting bottom plate B (402), a clamping groove (403), countersunk bolts (404) and bolts B (405), wherein the pressing plate (401) is fixed above the connecting bottom plate B (402) through the bolts B (405) at four corners, the clamping groove (403) is formed in a gap between the pressing plate (401) and the connecting bottom plate B (402), the countersunk bolts (404) are positioned in the clamping groove (403) and penetrate through the connecting bottom plate B (402), countersunk depths of countersunk bolt holes in the connecting bottom plate B (402) are larger than heights of bolt heads of the bolts B (405), and the connecting bottom plate B (402) and the pressing plate (401) clamp the beam (10) together; extending overhanging plates (501) from two ends of the truss structure (5); the vibrating table (6) comprises a slide bar (601), positioning holes B (602), a support (603), a handle (604) and a table top (605), wherein the table top (605) is connected with the support (603) through the slide bar (601), the handle (604) is positioned at two sides of the support (603), and the positioning holes B (602) are uniformly distributed on the table top (605); the counter-force wall (7) is L-shaped, the counter-force wall (7) comprises a reinforcing rib (701) and a counter-force wall body (702), and the reinforcing rib (701) is positioned on the side surface of the counter-force wall body (702);
the simulated earthquake vibration experiment table comprises an experiment table base (1), an excitation system (2), a vibration table (6) and a multi-layer frame structure (8), wherein the experiment table base (1) is positioned at the bottom of the simulated earthquake vibration experiment table, an exciter support (201), the vibration table (6) and the multi-layer frame structure (8) are fixed above the experiment table base (1) through positioning holes A (102), the exciter support (201) is positioned at the end part of the experiment table base (1), the vibration table (6) is connected with the exciter (202) through a connecting shaft (203), a bracket (603) is fixed on the experiment table base (1), and the multi-layer frame structure (8) is fixed on a table top (605) of the vibration table (6) through positioning holes B (602);
the frame structure forced vibration experiment table comprises an experiment table base (1), an excitation system (2), a counter-force wall (7) and a multi-layer frame structure (8), wherein the experiment table base (1) is positioned at the bottom of the frame structure forced vibration experiment table, the counter-force wall (7) and the multi-layer frame structure (8) are fixed on the experiment table base (1) through positioning holes A (102), the counter-force wall (7) is fixed at the end part of the experiment table base (1), the counter-force wall (702) is vertical to the experiment table base (1) and parallel to the short side of the experiment table base (1), an exciter support (201) is arranged on the front face of the counter-force wall (702), and the multi-layer frame structure (8) is laterally connected with a horizontal exciter (202) through a connecting shaft (203);
the truss structure forced vibration experiment table comprises an experiment table base (1), an excitation system (2), support columns (9) and a truss structure (5), wherein the experiment table base (1) is positioned at the bottom of the truss structure forced vibration experiment table, the excitation system (2) and the support columns (9) are fixed on the experiment table base (1) through positioning holes A (102), the truss structure (5) is positioned at the top ends of the support columns (9) at two sides, an overhanging plate (501) of the truss structure (5) is fixed at the top ends of the support columns (9), the excitation system (2) is positioned between the two support columns (9), the distance between the two support columns (9) is the same as the length of the truss structure (5), and the vibration exciter (202) is connected with the bottom of the truss structure (5) through a connecting shaft (203);
the simple beam forced vibration experiment table comprises an experiment table base (1), an excitation system (2), a beam (10), a simple beam restraint device (3) and support columns (9), wherein the experiment table base (1) is positioned at the bottom of the simple beam forced vibration experiment table, the support columns (9) and the excitation system (2) are fixed on the experiment table base (1) through positioning holes A (102), the two support columns (9) are respectively positioned at two sides of the experiment table base (1), the distance between the two support columns (9) is the same as the length of the beam (10), the simple beam restraint device (3) is fixed at the tops of the support columns (9), the beam (10) is built on the two support columns (9) through the simple beam restraint device (3), the beam (10), the simple beam restraint device (3) and the support columns (9) form the simple beam system, the excitation system (2) is positioned between the two support columns (9), and the vibration exciter (202) is connected with the bottom of the beam (10) through connecting shafts (203);
the cantilever forced vibration experiment table comprises an experiment table base (1), an excitation system (2), a support column (9), a beam (10) and a cantilever restraint device (4), wherein the experiment table base (1) is positioned at the bottom of the cantilever forced vibration experiment table, the support column (9) and the excitation system (2) are fixed on the experiment table base (1) through a positioning hole A (102), the end part of the beam (10) is fixed at the top end of the support column (9) through the cantilever restraint device (4), the beam (10), the cantilever restraint device (4) and the support column (9) form the cantilever system, the excitation system (2) is positioned below the other end part of the beam (10), and the vibration exciter (202) is connected with the bottom of the beam (10) through a connecting shaft (203).
2. The miniature assembly structure dynamics teaching experiment table according to claim 1, wherein: the experimental bench is characterized in that positioning holes are formed in the experimental bench base (1), the counter-force wall (7) and the vibrating table (6), and positioning bolt holes matched with the positioning holes are formed in the excitation system (2), the multi-layer frame structure (8), the truss structure (5), the support columns (9) and the beams (10).
3. The miniature assembly structure dynamics teaching experiment table according to claim 1, wherein: the assembling method of the experiment table comprises the following steps:
s1: placing the experiment table base (1) on an experiment field, and primarily leveling the experiment table base (1) through a leveling support (101);
s2: the assembly experiment table is assembled by selecting corresponding experiment table accessories according to different experiment requirements to form a simulated earthquake vibration experiment table or a frame structure forced vibration experiment table or a truss structure forced vibration experiment table or a simple beam forced vibration experiment table or a cantilever beam forced vibration experiment table;
s3: after the secondary leveling, the steps S1 and S2 are completed, the leveling support (101) is used for leveling the experiment table again.
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| CN109341992A (en) * | 2018-11-01 | 2019-02-15 | 广州大学 | A kind of experimental provision for vibration mechanics modal test |
| CN110930832B (en) * | 2019-12-11 | 2022-04-01 | 中国矿业大学 | Free vibration experimental device |
| CN115822077B (en) * | 2023-01-09 | 2023-05-12 | 中建五局第三建设有限公司 | Quick construction connection structure based on buckle formula girder steel and truss |
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