CN204128889U - A kind of beam bending experiment loading unit - Google Patents

A kind of beam bending experiment loading unit Download PDF

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Publication number
CN204128889U
CN204128889U CN201420585669.7U CN201420585669U CN204128889U CN 204128889 U CN204128889 U CN 204128889U CN 201420585669 U CN201420585669 U CN 201420585669U CN 204128889 U CN204128889 U CN 204128889U
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loading
freely
test
torsion
supported
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CN201420585669.7U
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陈啸
唐荆
杨科
赵晓路
徐建中
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Institute of Engineering Thermophysics of CAS
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Institute of Engineering Thermophysics of CAS
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Abstract

The utility model relates to a kind of beam bending experiment loading unit, comprise freely-supported-torsion combined isolator and combination loading component, freely-supported-torsion combined isolator is arranged on the two ends of beam sample, certain length is got as test section in region, portion in the sample, test section arranges combination loading component, be specially: test section two ends install respectively a horizontal reverse to loading arm, the free end distribution beam of two loading arms is fixedly connected with.During test, in the middle part of distribution beam, apply pressure, sample is produced bending; Distribution beam is by pressure mean allocation and be delivered to two loading arm free ends, makes the relative turn-back in test specimen test section two ends.According to measured windup-degree, sag and pressure load, can obtain beam crankling vibration load under moment of flexure-amount of deflection and torsion curve.The utility model only applies a pressure load, and the crankling vibration that just can realize beam loads, and boundary condition arranges ingenious and reasonable, and parameter measurement intuitive and convenient, test figure is accurate.

Description

A kind of beam bending experiment loading unit
Technical field
The utility model patent relates to a kind of experiment loading unit, especially a kind of beam crankling vibration load testing machine.
Background technology
In engineering, bridge, beams of concrete, steel pipe, power transmission pole, wind electricity blade etc. all can be reduced to beam, under the effect of the complicated applied force such as wind load and earthquake, not only can be subject to axial force and moment of flexure, also have the acting in conjunction of moment of torsion.Therefore, the crankling vibration load condition furtheing investigate beam plays an important role to analytical structure performance, failure mechanism.The test that current research beam crankling vibration loads is less, mainly because charger is difficult to realize, such as moment of flexure boundary condition is not desirable freely-supported, and when moment of torsion applies, beam is not ideal rotation, is difficult to obtain moment of flexure and moment of torsion etc. under same load-up condition simultaneously.And existing charger, what have is confined to certain material beam, and some loading ranges are limited, and some costs are high, and therefore these devices are all difficult to popularity in test or Practical Project.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the utility model provides a kind of beam bending experiment loading unit, its moment of flexure boundary condition is desirable freely-supported, when moment of torsion applies, beam is ideal rotation, can obtain moment of flexure and torque load under same loading environment, and one-piece construction is simple, low cost of manufacture, test figure are accurate simultaneously.
The technical scheme that the utility model adopts for its technical matters of solution is:
A kind of beam bending experiment loading unit, comprise freely-supported-torsion combined isolator and combination loading component, it is characterized in that, freely-supported described at least two-torsion combined isolator is fixedly installed on basis or ground, and described beam sample two ends are respectively provided to freely-supported-torsion combined isolator described in few; Get certain length as bending test section in the central region of described beam sample, described bending test section sets firmly described combination loading component; Wherein,
--described freely-supported-torsion combined isolator comprises the fixed pedestal, roller, torsion bearing and the freely-supported bearing that are installed together successively from top to bottom, between described fixed pedestal and torsion bearing, roller described in several is set, electronics troptumeter installed by described torsion bearing, the lower surface of described torsion bearing is cambered surface, the end of described beam sample is set above described freely-supported bearing, and thickness setting adjustable elements backing plate between described freely-supported bearing and the end of beam sample;
--combination loading component comprises loading arm, distribution beam and loading cross section reinforcement, in described bending test section two ends loaded surfaces sheathed loading cross section reinforcement respectively, and install respectively at described bending test section two ends one be arranged on load horizontal reverse in cross section reinforcement to loading arm, described horizontal reverse to loading arm free end between be fixedly connected with by distribution beam, described distribution beam is provided with pressure transducer, and the middle part of described distribution beam is pressure application point, at the middle part of described bending test section, displacement transducer is installed.
Preferably, described combination loading component also comprises loading connecting rod, and described loading connecting rod is arranged between described loading cross section reinforcement and loading arm.
Preferably, the free end of described loading arm installs column, be fixedly connected with described column by distribution beam.
Preferably, described fixed pedestal is a uncovered casing, fluted on sidewall, for installing roller.
Preferably, described roller is formed by axle core and urceolus assembly, and the two ends land portions of axle core is scabbled, and is placed in the sidewall notches of described fixed pedestal, and described urceolus supports and reverses bearing, and outside weldings is shaped, and boring has brace summer.
Preferably, described freely-supported bearing is slender cylinder, is reversing the angle iron of upper surface of support welding for preventing right cylinder from rolling.
Beam bending experiment loading unit of the present utility model, during test, applies pressure in the middle part of distribution beam, test specimen is produced bending; Meanwhile, distribution beam is by pressure mean allocation and be delivered to two loading arm free ends, makes the relative turn-back in test specimen test section two ends.At test section installation position displacement sensor instrument, measure sag value, and read pressure load value from pressure transducer.So only input a pressure load, the crankling vibration that can realize beam loads.By windup-degree, sag, pressure load, can obtain beam crankling vibration load under moment of flexure-amount of deflection and torsion curve.
Relative to prior art, the utility model has the advantage of, only apply a pressure load to beam sample, can obtain moment of flexure and moment of torsion simultaneously, boundary condition arranges ingenious and reasonable, and test parameters measures intuitive and convenient, and test figure is accurate.Device is not particularly limited the material of beam, section form, loading range, and structure is simple, and cost is lower, applied widely.
Accompanying drawing explanation
Fig. 1 is beam bending experiment loading unit overall diagram of the present utility model;
Fig. 2 is freely-supported-torsion combined isolator schematic diagram, and wherein, (A) is cross-wise direction schematic diagram, and (B) is side surface direction schematic diagram;
Fig. 3 is that test section loads cross section partial enlarged drawing, and wherein, (A) is square-section beam; (B) be triangular-section beam; (C) be round section beam.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearly understand, to develop simultaneously embodiment referring to accompanying drawing, the utility model is further described.
As shown in Fig. 1 ~ 2, beam crankling vibration load testing machine of the present utility model, it comprises freely-supported-torsion combined isolator and combination loading component two parts.Freely-supported-torsion combined isolator comprises fixed pedestal 1, roller 2, reverses bearing 3, freely-supported bearing 4, electronics troptumeter 5, backing plate 6.A freely-supported-torsion combined isolator is fixed at sample two ends respectively, for supporting sample, controls boundary condition.Be specially: fixed pedestal 1 is placed some rollers 2, roller 2 supports and reverses bearing 3, and installs electronics troptumeter 5, and this part textural association for determining the twist boundary condition of test specimen, and measures windup-degree.Reverse bearing 3 and freely-supported bearing 4 is installed, for determining the freely-supported curved boundaries condition of test specimen above again.For realizing reversing loading accurately, by reversing the design of bearing 3 radian and the adjustment of test specimen backing plate 6 thickness, guarantee the cross section centre of twist of the bearing radius of torsion by test specimen.
Combination loading component comprises loading connecting rod 7, loading arm 8, distribution beam 9, loads cross section reinforcement 10, pressure transducer 11, displacement transducer 12.Get certain length as bending test section in test specimen central region, install respectively at test section two ends a horizontal reverse to loading arm 8, the free end distribution beam 9 of two loading arms 8 is fixedly connected with.During test, in the middle part of distribution beam 9, apply pressure, test specimen is produced bending; Meanwhile, distribution beam is by pressure mean allocation and be delivered to two loading arm 8 free ends, makes the relative turn-back in test specimen test section two ends.At test section installation position displacement sensor 12, measure sag value, and read pressure load value from pressure transducer 11, and by adjustment loading arm 8 length, obtain the moment of torsion needing to apply.So only input a pressure load, can realize loading the crankling vibration of beam.By windup-degree, sag, pressure load, the moment of flexure-amount of deflection of beam under crankling vibration and torsion curve can be obtained.
As shown in Figure 2, fixed pedestal 1 is a uncovered casing, fluted on sidewall, for installing roller 2.Roller 2 is formed by axle core and urceolus assembly, and the two end portions of axle core is scabbled, and is placed in cavities, and urceolus can unsettledly freely be rotated.Urceolus supports and reverses bearing 3, reversing bearing 3 lower surface be arc shape, and its center of curvature is positioned at the centre of twist of test specimen, outside weldings shaping, and boring has brace summer, both can weight reduction, can guarantee outer shape again.
When using beam crankling vibration load testing machine of the present utility model, with reference to Fig. 2, first according to beam specimen length, the fixed pedestal 1 two being equipped with roller 2 is fixed on ground or test-bed, up place successively again and reverse bearing 3, freely-supported bearing 4 and backing plate 6, then electronics troptumeter 5 is fixed on and reverses on bearing 3.This part parts can ensure the bending and torsion boundary condition of sample, and measures windup-degree.
With reference to Fig. 1 and Fig. 3, certain length is got as test section in region, portion in the sample, and outside, loading cross section, test section two ends puts reinforcement 10 respectively.Test section two ends install respectively a horizontal reverse to loading arm 8, with loading connecting rod 7 strengthening fixedly prevent loading arm 8 to be out of shape, the free end of loading arm 8 installs column, is fixedly connected with by distribution beam 9.Distribution beam 9 and sample distinguish setting pressure sensor 11 and displacement transducer 12.This part for applying bending and torsion load, and measures load and deflection value.
With reference to Fig. 1, sample two ends are placed on torsion-freely-supported combined isolator 1, apply pressure in the middle part of distribution beam 9, test specimen is produced bending; Meanwhile, distribution beam 9 is by pressure mean allocation and be delivered to two loading arm 8 free ends, makes the relative turn-back in test specimen test section two ends.Moment of flexure required in test and moment of torsion are produced by external force load p, P value is measured by pressure transducer 11, and by specimen length and loading arm length, calculated bending moment and moment of torsion, amount of deflection is measured by displacement transducer 12, and windup-degree measures fixed pedestal 1 by electronics troptumeter 5 and the relative rotation reversed between bearing 3 realizes.So only input a pressure load, the crankling vibration that can realize beam loads, and obtains moment of flexure-amount of deflection and torsion curve.
As shown in Figure 3, when using beam crankling vibration load testing machine of the present utility model, the cross sectional shape of beam is unrestricted, can be rectangle, triangle or circle.No matter be which kind of cross sectional shape, all adopt reinforcement 10 to wrap up sample for square-section in loading place.Further, beam can be hollow body, also can be solid.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment made, equivalent replacement, improvement etc., all should be included within scope of the present utility model.

Claims (6)

1. a beam bending experiment loading unit, comprise freely-supported-torsion combined isolator and combination loading component, it is characterized in that, freely-supported described at least two-torsion combined isolator is fixedly installed on basis or ground, and described beam sample two ends are respectively provided to freely-supported-torsion combined isolator described in few; Get certain length as bending test section in the central region of described beam sample, described bending test section sets firmly described combination loading component; Wherein,
--described freely-supported-torsion combined isolator comprises the fixed pedestal, roller, torsion bearing and the freely-supported bearing that are installed together successively from top to bottom, between described fixed pedestal and torsion bearing, roller described in several is set, electronics troptumeter installed by described torsion bearing, the lower surface of described torsion bearing is cambered surface, the end of described beam sample is set above described freely-supported bearing, and thickness setting adjustable elements backing plate between described freely-supported bearing and the end of beam sample;
--combination loading component comprises loading arm, distribution beam and loading cross section reinforcement, in described bending test section two ends loaded surfaces sheathed loading cross section reinforcement respectively, and install respectively at described bending test section two ends one be arranged on load horizontal reverse in cross section reinforcement to loading arm, described horizontal reverse to loading arm free end between be fixedly connected with by distribution beam, described distribution beam is provided with pressure transducer, and the middle part of described distribution beam is pressure application point, at the middle part of described bending test section, displacement transducer is installed.
2. beam bending experiment loading unit according to claim 1, is characterized in that, described combination loading component also comprises loading connecting rod, and described loading connecting rod is arranged between described loading cross section reinforcement and loading arm.
3. beam bending experiment loading unit according to claim 1, is characterized in that, the free end of described loading arm installs column, be fixedly connected with described column by distribution beam.
4. beam bending experiment loading unit according to claim 1, is characterized in that, described fixed pedestal is a uncovered casing, fluted on sidewall, for installing roller.
5. beam bending experiment loading unit according to claim 1, it is characterized in that, described roller is formed by axle core and urceolus assembly, the two ends land portions of axle core is scabbled, be placed in the sidewall notches of described fixed pedestal, described urceolus supports and reverses bearing, and outside weldings is shaped, and boring has brace summer.
6. beam bending experiment loading unit according to claim 5, is characterized in that, described freely-supported bearing is slender cylinder, is reversing the angle iron of upper surface of support welding for preventing right cylinder from rolling.
CN201420585669.7U 2014-10-10 2014-10-10 A kind of beam bending experiment loading unit Active CN204128889U (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104359754A (en) * 2014-10-10 2015-02-18 中国科学院工程热物理研究所 Beam component bending and torsion combined load test device and method
CN104897341A (en) * 2015-03-20 2015-09-09 西北工业大学 Controllable variable-temperature simulation loading system for sublayer baffle-type fluid wall shear stress sensor
CN105136445A (en) * 2015-09-25 2015-12-09 华侨大学 Self-balancing-type method of realizing building test component end portion constraint and apparatus thereof
CN105865943B (en) * 2016-05-25 2018-05-29 江阴圣世杰机械制造有限公司 Detect the test method of stabilizer bar weld strength test-bed
CN108469385A (en) * 2018-03-13 2018-08-31 哈尔滨工业大学 A kind of loading head for realizing that moment of flexure load synchronous with torque is non-interference
CN110132555A (en) * 2019-04-22 2019-08-16 燕山大学 Assembling structure, testing machine and the method tested for bending load and torsional load

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104359754A (en) * 2014-10-10 2015-02-18 中国科学院工程热物理研究所 Beam component bending and torsion combined load test device and method
CN104897341A (en) * 2015-03-20 2015-09-09 西北工业大学 Controllable variable-temperature simulation loading system for sublayer baffle-type fluid wall shear stress sensor
CN105136445A (en) * 2015-09-25 2015-12-09 华侨大学 Self-balancing-type method of realizing building test component end portion constraint and apparatus thereof
CN105136445B (en) * 2015-09-25 2017-07-21 华侨大学 A kind of self-balancing type realizes the method and device of building test component end restraint
CN105865943B (en) * 2016-05-25 2018-05-29 江阴圣世杰机械制造有限公司 Detect the test method of stabilizer bar weld strength test-bed
CN108469385A (en) * 2018-03-13 2018-08-31 哈尔滨工业大学 A kind of loading head for realizing that moment of flexure load synchronous with torque is non-interference
CN110132555A (en) * 2019-04-22 2019-08-16 燕山大学 Assembling structure, testing machine and the method tested for bending load and torsional load

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