CN209525203U - Cantilever beam be hit load action when solve live load factor experimental provision - Google Patents
Cantilever beam be hit load action when solve live load factor experimental provision Download PDFInfo
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- CN209525203U CN209525203U CN201920182758.XU CN201920182758U CN209525203U CN 209525203 U CN209525203 U CN 209525203U CN 201920182758 U CN201920182758 U CN 201920182758U CN 209525203 U CN209525203 U CN 209525203U
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- cantilever beam
- support rod
- clamper
- shot
- experimental bench
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Abstract
Cantilever beam be hit load action when solve live load factor experimental provision, including cantilever beam, suspension hook, foil gauge, left experimental bench and right experimental bench, graduated scale and support rod are vertically installed on right experimental bench, it is arranged on suspension hook in cantilever beam bottom, foil gauge is arranged at the top of cantilever beam, shot is mounted with by lifting rope on suspension hook, lifting rope is under the drawing that shot is self-possessed, lifting rope and graduated scale correspondence and parallel, support rod lower part is provided with the first clamper for clamping shot, support rod top is provided with the second clamper for keeping cantilever beam static for clamping cantilever beam right end.The utility model integrates experimental model, clamping device, measuring device, that the preferable Stress Calculation met when being hit load action about component simplifies algorithm it is assumed that experiment is convenient, test number accuracy is high, reusable；The utility model realizes the experiment of the content of courses, and student is made to be easier to receive uninteresting mechanics classroom to listen to the teacher.
Description
Technical field
The utility model belongs to Mechanics of Materials Teaching technical field, and in particular to a kind of cantilever beam be hit load action when
Solve the experimental provision of live load factor.
Background technique
It accurately to analyze by the impact stress and deformation of alluvium, be considered as the propagation of elastic stress wave in body, count
It is complex.In engineering, a kind of more rough but relatively safety simplified calculation method is generallyd use, as by alluvium
The estimation of interior impact stress, solves live load factor, and accuracy is lower.In addition, the teaching about this respect is mainly theory teaching,
About experiment test cantilever beam be hit load action when solve live load factor it is then fewer, theory cannot with practice be combined,
Student's preferably intuitivism apprehension digestion relevant knowledge content is just made it difficult for when classroom is given lessons.
Utility model content
The utility model provides that a kind of scientific in principle, structure is simple, is convenient for solve shortcoming in the prior art
Operation, safe and reliable, test number cantilever beam with high accuracy be hit load action when solve the experimental provision of live load factor.
In order to solve the above technical problems, the utility model adopts the following technical solution: cantilever beam be hit load action when
The experimental provision for solving live load factor, including cantilever beam, suspension hook, foil gauge, left experimental bench and the right side on the right side of left experimental bench
Experimental bench, cantilever beam left end are fixed on left experimental bench, and outrigger horizontal setting, cantilever beam right side position is in right experimental bench
Top is vertically installed with the graduated scale on rear side of cantilever beam and the support on the right side of cantilever beam right part on right experimental bench
Bar, suspension hook upper end be fixedly connected on cantilever beam bottom and with graduated scale correspondence, foil gauge setting is solid in suspension hook and cantilever beam
At the top of the cantilever beam of the surface of fixed point, shot is mounted with by lifting rope on suspension hook, lifting rope is under the drawing that shot is self-possessed, lifting rope
With graduated scale correspondence and parallel, support rod lower part is provided with the first clamper for clamping shot, and support rod top is set
It is equipped with the second clamper for keeping cantilever beam static for clamping cantilever beam right end.
Support rod is made of rectangular tube, vertically offers pilot hole on the left of support rod, the first clamper includes
The elevating lever being slidably connected inside support rod, elevating lever left side is fixedly connected with the horizon bar being threaded through in pilot hole, horizontal
Bar left end is provided with the mechanical gripper for clamping shot, and support rod left lower is provided with the snail for driving lifter rod lifting
Worm and gear mechanism.
Support rod upper left-hand, open, the right side of cantilever beam on the left of the second clamper are fixedly connected on the right side of second clamper
End is extend into the second clamper, and the radar range finding for monitoring the upper and lower displacement of cantilever beam right part is provided on the second clamper
Instrument.
By adopting the above technical scheme, the experimental method of the utility model, comprising the following steps:
(1), checking experiment device, confirmation experimental provision operational excellence, the lifting rope for the shot fastened is hung at hook, will
Foil gauge, radar range finder, the first clamper and the second clamper are connect with computer respectively by controlling cable, pilot scale study
Device, computer carry out real-time monitoring and measurement to all data；
(2), horizontal distance of the record suspension hook apart from left experimental bench, i.e. shot remember the torque arm length of the impact force of cantilever beam
For L, shot lifting rope when static is in distance of the shot of rigid tensional state at this time apart from right experimental bench upper surface and is denoted as h1；
(3) shot is acted on a cantilever beam as dead load by lifting rope, and computer records the output valve of foil gauge；
(4) start the first clamper, mechanical gripper clamps the shot that weight is P, restarts worm gear mechanism, and driving rises
Drop bar is moved upwards up to any one position in lifting rope length range along support rod, records shot table on right experimental bench
The distance in face is denoted as h2；
(5) mechanical gripper unclamps shot, and shot starts to do the movement of falling object, and when lifting rope tenses, vertical impact load is opened
Beginning acts on a cantilever beam, the strain value of computer record foil gauge output after experiment；
(6) at least step (3), (4) and (5) three times are repeated；
(7) average value for calculating foil gauge output valve when shot is as dead load in step (3), is denoted as；Calculate step
(5) average value of vertical Impact Load foil gauge output valve when cantilever beam, is denoted as in；Shot does freely falling body fortune
Dynamic displacement is h=h2- h1；
(8) cantilever beam is solved by the formula for simplifying algorithm live load factor when vertical Impact Load are as follows:
；
The live load factor being calculated by the data that experiment measures are as follows:
E is Young's modulus；I is the moment of inertia；It is the displacement of dead load effect underbeam；It is to be obtained based on theoretical calculation
Live load factor,It is to be calculated by the data that experiment obtains, comparesWithSize, if the error of the two exists
Within 0.2, then the live load factor tested is accurate.
Shock loading in step (5) pulls cantilever beam to move downward, and radar range finder measures the down position of cantilever beam
Numerical value constantly become larger；Second clamper carries out real-time monitoring and control by computer, when the numerical value that radar range finder measures goes out
When now reducing, in order to avoid springback influence experimental result occurs for cantilever beam, cantilever beam is clamped in the starting of the second clamper makes cantilever beam
It no longer moves, primary experiment leaves it at that, and computer records the displacement of Analysis of A Cantilever Beam Under right end；Record experiment start, finish time
The numerical value for spending ruler, calculates the displacement that shot does the movement of falling object.
In conclusion compared with the prior art, the utility model has the following advantages:
The utility model can use the experimental provision and solve cantilever beam by calculation simplified when vertical Impact Load
The simplification algorithm experimental of method live load factor.The device integrates experimental model, clamping device, measuring device, preferable to meet
Be hit about component load action when Stress Calculation simplify algorithm it is assumed that experiment is convenient, test number accuracy is high,
It is reusable.The utility model plays a multiplier effect in teaching process, realizes the experiment of the content of courses, makes to learn
It is raw to be easier to receive uninteresting mechanics classroom to listen to the teacher.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the cross-sectional view connected between support rod and elevating lever；
Fig. 3 is the top view of mechanical gripper in Fig. 1.
Specific embodiment
As shown in Figure 1-Figure 3, the cantilever beam of the utility model be hit load action when solve live load factor experiment dress
It sets, including cantilever beam 1, suspension hook 2, foil gauge 15, left experimental bench 13 and the right experimental bench 11 on the right side of left experimental bench 13, cantilever
1 left end of beam is fixed on left experimental bench 13, and cantilever beam 1 is horizontally disposed, and 1 right side position of cantilever beam is on right experimental bench 11
It is square, the graduated scale 5 positioned at 1 rear side of cantilever beam and the branch on the right side of 1 right part of cantilever beam are vertically installed on right experimental bench 11
Strut 12,2 upper end of suspension hook be fixedly connected on 1 bottom of cantilever beam and with 5 correspondence of graduated scale, foil gauge 15 be arranged in suspension hook 2
At the top of the cantilever beam 1 of the surface of 1 fixed point of cantilever beam, shot 4 is mounted with by lifting rope 3 on suspension hook 2, lifting rope 3 is in shot 4
Under the drawing of self weight, lifting rope 3 and 5 correspondence of graduated scale and parallel, 12 lower part of support rod is provided with for clamping shot 4
One clamper, 12 top of support rod are provided with the second clamper 8 for keeping cantilever beam 1 static for clamping 1 right end of cantilever beam.
Support rod 12 is made of rectangular tube, and 12 left side of support rod vertically offers pilot hole 16, the first clamping
Device includes the elevating lever 14 being slidably connected inside support rod 12, is fixedly connected with and is threaded through in pilot hole 16 on the left of elevating lever 14
Horizon bar 9,9 left end of horizon bar is provided with the mechanical gripper 7 for clamping shot 4, and the setting of 12 left lower of support rod is useful
In the worm gear mechanism 10 that driving elevating lever 14 is gone up and down.
12 upper left-hand of support rod is fixedly connected on the right side of second clamper 8,8 left side of the second clamper is open, cantilever beam 1
Right end extend into the second clamper 8, be provided on the second clamper 8 for monitoring 1 right part upper and lower displacement of cantilever beam
Radar range finder 6.
Cantilever beam be hit load action when solve live load factor experimental provision experimental method, include the following steps,
(1), checking experiment device, confirmation experimental provision operational excellence, the lifting rope 3 for the shot 4 fastened is hung at hook,
Foil gauge 15, radar range finder 6, the first clamper and the second clamper 8 are connect with computer respectively by controlling cable, adjusted
Experimental provision is tried, computer carries out real-time monitoring and measurement to all data；
(2), horizontal distance of the record suspension hook 2 apart from left experimental bench 13, the i.e. arm of force of the shot 4 to the impact force of cantilever beam 1
Length is denoted as L, the lifting rope 3 when static of shot 4 be in the shot 4 of rigid tensional state at this time apart from right 11 upper surface of experimental bench away from
From being denoted as h1；
(3) shot 4 is acted on cantilever beam 1 as dead load by lifting rope 3, and computer records the output of foil gauge 15
Value；
(4) start the first clamper, mechanical gripper 7 clamps the shot 4 that weight is P, restarts worm gear mechanism 10, drives
Dynamic elevating lever 14 is moved upwards up to any one position in 3 length range of lifting rope along support rod 12, records shot 4 apart from the right side
The distance of 11 upper surface of experimental bench is denoted as h2；
(5) mechanical gripper 7 unclamps shot 4, and shot 4 starts to do the movement of falling object, when shot 4 falls on minimum point, lead
Ball 4 starts to act on cantilever beam 1 by the vertical impact load of lifting rope 3, and what computer record foil gauge 15 exported at this time answers
Variate；
(6) at least step (3), (4) and (5) three times are repeated；
(7) average value for calculating 15 output valve of foil gauge when shot 4 is as dead load in step (3), is denoted as；It calculates
The average value of vertical Impact Load 15 output valve of foil gauge when cantilever beam 1, is denoted as in step (5)；Shot 4 is done certainly
It is h=h by the displacement of falling2- h1；
(8) cantilever beam is solved by the formula for simplifying algorithm live load factor when vertical Impact Load are as follows:
；
The live load factor being calculated by the data that experiment measures are as follows:
E is Young's modulus；I is the moment of inertia；It is the displacement of dead load effect underbeam；It is to be obtained based on theoretical calculation
Live load factor,It is to be calculated by the data that experiment obtains, comparesWithSize, if the error of the two exists
Within 0.2, then the live load factor tested is accurate.
Shock loading in step (5) pulls cantilever beam 1 to move downward, radar range finder 6 measure cantilever beam 1 to bottom
The numerical value set constantly becomes larger；Second clamper 8 carries out real-time monitoring and control by computer, when the number that radar range finder 6 measures
When value reduces, cantilever beam 1 is clamped in the starting of the second clamper 8, and cantilever beam 1 no longer moves, and avoids cantilever beam 1 that rebound shadow occurs
Experimental result is rung, so far, primary experiment terminates；Computer records the displacement of Analysis of A Cantilever Beam Under 1, is measured and is tied according to graduated scale 5
Fruit calculates the displacement that shot 4 does the movement of falling object.
The first clamper in the utility model is mechanical using the electronic clamping jaw of fertile field intelligent robot Co., Ltd production
Hand clamper；Second clamper is the clamping in a kind of vertical impact testing machine of meals evil spirit teacher (Jiangsu) household products Co., Ltd
Device.
The present embodiment not makes any form of restriction the shape of the utility model, material, structure etc., all foundations
The technical essence of the utility model any simple modification, equivalent change and modification to the above embodiments, belong to this reality
With the protection scope of new technique scheme.
Claims (3)
- The experimental provision of live load factor is solved when load action 1. cantilever beam is hit, it is characterised in that: including cantilever beam, hang Hook, foil gauge, left experimental bench and the right experimental bench on the right side of left experimental bench, cantilever beam left end are fixed at left experimental bench On, outrigger horizontal setting, cantilever beam right side position is vertically installed on right experimental bench positioned at cantilever beam above right experimental bench The graduated scale of rear side and the support rod on the right side of cantilever beam right part, suspension hook upper end be fixedly connected on cantilever beam bottom and with quarter Ruler correspondence is spent, foil gauge is arranged at the top of the cantilever beam of the surface of suspension hook and cantilever beam fixed point, by hanging on suspension hook Rope is mounted with shot, and lifting rope is under the drawing that shot be self-possessed, lifting rope and graduated scale correspondence and parallel, and support rod lower part is arranged There is the first clamper for lead gripper ball, support rod top, which is provided with, makes static of cantilever beam for clamping cantilever beam right end Two clampers.
- The experimental provision of live load factor, feature are solved when load action 2. cantilever beam according to claim 1 is hit Be: support rod is made of rectangular tube, and pilot hole is vertically offered on the left of support rod, and the first clamper includes sliding The elevating lever being connected to inside support rod, elevating lever left side are fixedly connected with the horizon bar being threaded through in pilot hole, and horizon bar is left End is provided with the mechanical gripper for clamping shot, and support rod left lower is provided with the worm gear snail for driving lifter rod lifting Linkage.
- The experimental provision of live load factor, feature are solved when load action 3. cantilever beam according to claim 1 is hit It is: is fixedly connected on support rod upper left-hand, opening on the left of the second clamper on the right side of the second clamper, the right end of cantilever beam is stretched Enter into the second clamper, the radar range finder for monitoring the upper and lower displacement of cantilever beam right part is provided on the second clamper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201920182758.XU CN209525203U (en) | 2019-02-01 | 2019-02-01 | Cantilever beam be hit load action when solve live load factor experimental provision |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920182758.XU CN209525203U (en) | 2019-02-01 | 2019-02-01 | Cantilever beam be hit load action when solve live load factor experimental provision |
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| Publication Number | Publication Date |
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| CN209525203U true CN209525203U (en) | 2019-10-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109870373A (en) * | 2019-02-01 | 2019-06-11 | 河南理工大学 | Cantilever beam be hit load action when solve live load factor experimental provision and method |
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2019
- 2019-02-01 CN CN201920182758.XU patent/CN209525203U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109870373A (en) * | 2019-02-01 | 2019-06-11 | 河南理工大学 | Cantilever beam be hit load action when solve live load factor experimental provision and method |
| CN109870373B (en) * | 2019-02-01 | 2024-03-22 | 河南理工大学 | Experimental device and method for solving dynamic load factor when cantilever beam is acted by impact load |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191022 Termination date: 20210201 |
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| CF01 | Termination of patent right due to non-payment of annual fee |