CN101881675B - Device and method for measuring horizontal shear of support - Google Patents
Device and method for measuring horizontal shear of support Download PDFInfo
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- CN101881675B CN101881675B CN201010195304XA CN201010195304A CN101881675B CN 101881675 B CN101881675 B CN 101881675B CN 201010195304X A CN201010195304X A CN 201010195304XA CN 201010195304 A CN201010195304 A CN 201010195304A CN 101881675 B CN101881675 B CN 101881675B
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- metal bar
- horizontal shear
- top board
- support
- horizontal
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Abstract
The invention discloses a device and a method for measuring horizontal shear of a support, and relates to a shear measuring device. Double spherical balls are arranged between a top plate and a frame bottom plate, one end of the spherical ball is embedded into a spherical groove of the top plate, the other end of the spherical ball is embedded into a spherical groove of the frame bottom plate, and the double spherical balls enable the top plate to translate freely with a small amplitude in the random horizontal direction; a metal bar is horizontally suspended, one end of the metal bar is fixed on the rim of the frame bottom plate, the other end of the metal bar is contacted with the lateral surface of the top plate, and a strain sheet is stuck to the middle part of the steel bar; an accelerator is arranged on the lateral surface of the top plate; and the top plate translates freely in the random horizontal direction to press the metal bar so that the metal bar is deformed, an axial force of the metal bar is calculated by measuring the strain of the metal bar, and the horizontal shear of the support is obtained. The method can overcome the defects that the conventional measuring method has fussy calibration and only can measure the unidirectional horizontal shear; a horizontal shear vector of the support can be measured by arranging the device between a model and a foundation; and the device and the method are suitable for any structure, do not need calibration, and have low cost.
Description
Technical field
The present invention relates to the shearing force measurement device, relate to the measurement mechanism of fixed end bearing in a kind of energy measurement dynamic process or hinged support place horizontal shear of support specifically, and utilize this device to carry out the method that horizontal shear of support is measured.
Background technology
In recent years, the power of coupling interlock in real time test method has obtained fast development.The power of coupling interlock in real time test method is a kind of new structure dynamic test method, and measuring bearing place horizontal shear is the technical requirement commonly used of this experimental technique.
At present, the method for known measurement horizontal shear of support is the strain measurement method.But this method is only applicable to the elastic bar structure that the local train of bearing place is convenient to record, and measures equipment and comprises: top load bringing device, foil gauge, lead, data collection station.Foil gauge is attached to the both sides of bearing place rod member, is wired to data collection station.The first step is demarcated and is obtained stress-strain diagram: structure applied horizontal known force, measure bearing place stress through foil gauge.Gather some groups of data, match draws " horizontal force-strain " curve.Second step, carry out actual dynamic test, measure the strain of bearing place, according to the anti-horizontal force of asking of " horizontal force-strain " curve, be the horizontal seat shearing on this direction.
Other has a kind of one-way support shearing force measurement mechanism, utilizes slide rail to remove the horizontal single-headed constraint, records the shearing of horizontal single-headed through the axle power of surveying metal bar, and still the limitation of this device is only can survey unidirectional shearing, and measurement result is a scalar.
Summary of the invention
Existing strain measurement method applicable elements is harsh in order to overcome, calibration process is loaded down with trivial details; And the one-way support shearing force measurement mechanism deficiency of the unidirectional shearing of energy measurement only; This patent provides a kind of horizontal shear of support measurement mechanism; This device is not only applicable to any structure, need not to demarcate, and the support shearing force vector on the energy measurement surface level.
The technical scheme that the present invention adopts is: two spherical ball are installed between top board and the shaped as frame base plate, and an end is embedded in the ball recess of top board, and the other end is embedded in the ball recess of shaped as frame base plate; Solid lubrication oil is filled up in the gap of said pair of spherical ball and said two ball recess, and two spherical ball can make top board free by a small margin translation on horizontal any direction, promptly remove the constraint on the surface level; The metal bar horizontal boom is installed, and an end of metal bar is fixed on the frame of shaped as frame base plate, and the other end polishes and the top board contacts side surfaces; Accelerometer places the side of top board; Foil gauge is posted at the middle part of metal bar, and strain signal imports data acquisition system (DAS) into through lead; Top board is free translation on horizontal any direction, and the compressing metal bar makes it distortion, through measuring the strain of metal bar, calculates the axle power of metal bar and obtains horizontal shear of support.
Two metal bars all are installed on every limit of said shaped as frame base plate frame, are distributed on the directions X and Y direction of two quadratures.
The material that said metal bar uses comprises aluminium alloy, common straightcarbon steel, alloy steel.
The quantity of said pair of spherical ball is more than 4 or 4.
Two radiuss of sphericity of said pair of spherical ball are identical, and the centre of sphere line of two spheroids is the 1/3-1/2 of radius of sphericity in the length of two spheroid intersection.
A kind of method of using described horizontal shear of support measurement mechanism to carry out the horizontal shear of support measurement may further comprise the steps:
(1) said horizontal shear of support measurement mechanism is installed between model to be measured and the former bearing, model to be measured is fixed on the top board, and the shaped as frame base plate is fixed on the former bearing;
(2) measure the deformation quantity ε of metal bar through foil gauge
x, ε
y, measure the acceleration a of top board through accelerometer
xAnd a
y, measure the cross-sectional area A of metal bar and the quality m of top board;
(3) pass through formula F
x=EA ε
x+ ma
xAnd F
y=EA ε
y+ ma
y, promptly get the vector of horizontal shear, wherein E is the elastic modulus of metal bar.
The material that said metal bar uses comprises aluminium alloy, common straightcarbon steel, alloy steel.
The beneficial effect of patent of the present invention is: only need this device is installed between model and the basis, just can measure the horizontal shear vector at bearing place, be applicable to any structure, need not to demarcate, easy to use, measurement result is accurate, and is with low cost, and the market competitiveness is strong.
Description of drawings
Fig. 1 is the structural representation of said horizontal shear of support measurement mechanism.
Fig. 2 is two spherical ball perspective views in the plane.
Label among the figure:
The 1-top board; 2-shaped as frame base plate; The two spherical ball of 3-; The 4-metal bar; The 5-foil gauge; The 6-accelerometer.
Embodiment
The invention provides the measurement mechanism of fixed end bearing in a kind of energy measurement dynamic process or hinged support place horizontal shear of support; And utilize this device to carry out the method that horizontal shear of support is measured, below in conjunction with accompanying drawing and embodiment the present invention is further specified.
As shown in Figure 1,4 two spherical ball 3 are installed between top board 1 and the shaped as frame base plate 2, and an end of two spherical ball 3 is embedded in the ball recess of top board 1, and the other end is embedded in the ball recess of shaped as frame base plate 2; A radius of sphericity of the two spherical ball 3 of ball recess radius ratio is bigger, and solid lubrication oil is filled up in both gaps; Two spherical ball 3 can not only make top board 1 free by a small margin translation on horizontal any direction, and can prevent that top board 1 from starting in the process of vibration.
Two Al-alloy metal rods 4 all are installed on every limit of base plate frame 2, are distributed on the direction of two quadratures, defining one of them direction is directions X, and another is the Y direction; Metal bar 4 horizontal boom are installed, and only an end is fixed on the base plate frame 2, and the other end polishes, and well contact to transmit pressure with the side of top board 1; Foil gauge 5 is posted at the middle part of metal bar 4, and strain signal imports data acquisition system (DAS) into through lead, and accelerometer 6 places the side of top board 1.During top board 1 translation the compressing metal bar 4 make it the distortion, through measured X to the deformation of Y to metal bar, can calculate metal bar axle power and obtain surface level upper bracket shearing vector.
As shown in Figure 2, two radiuss of sphericity of said pair of spherical ball 3 are identical, and the centre of sphere line of two spheroids is 1/3 of a radius of sphericity in the length of two spheroid intersection.
When using said device to carry out the horizontal shear of support measurement; Said horizontal shear of support measurement mechanism is installed between model to be measured and the former bearing; Model to be measured is fixed on the top board 1, and shaped as frame base plate 2 is fixed on the former bearing, is equivalent to remove the constraint of model on surface level; Former bearing is become slip support abutment, change into the axle power of surveying metal bar 4 surveying support shearing force.Measure the deformation quantity ε of metal bar 4 through foil gauge 5
x, ε
y, measure the acceleration a of top board 1 through accelerometer
xAnd a
y, the cross-sectional area A and the top board 1 quality m of measurement metal bar 4.Calculate with the dynamic equilibrium method, be easy to get: F
x=EA ε
x+ ma
xAnd F
y=EA ε
y+ ma
yPromptly get the vector of horizontal shear, wherein E is the elastic modulus of metal bar 4.Because sphere contact friction force calculation of complex, and the friction force influence is very little under the lubricating oil effect, can ignore.
Claims (6)
1. a horizontal shear of support measurement mechanism is characterized in that, two spherical ball (3) are installed between top board (1) and the shaped as frame base plate (2), and an end is embedded in the ball recess of top board (1), and the other end is embedded in the ball recess of shaped as frame base plate (2); Said pair of spherical ball (3) filled up solid lubrication oil with the gap of said two ball recess, and two spherical ball (3) can make top board (1) free by a small margin translation on horizontal any direction, promptly remove the constraint on the surface level; On every limit of said shaped as frame base plate (2) frame two metal bars (4) are installed all, are distributed on the directions X and Y direction of two quadratures; Metal bar (4) horizontal boom is installed, and an end of metal bar (4) is fixed on the frame of shaped as frame base plate (2), and the other end polishes and the top board contacts side surfaces; Accelerometer (6) places the side of top board (1); Foil gauge (5) is posted at the middle part of metal bar (4), and strain signal imports data acquisition system (DAS) into through lead; Top board (1) free translation on horizontal any direction, compressing metal bar (4) makes it distortion, through measuring the strain of metal bar (4), calculates the axle power of metal bar (4) and obtains horizontal shear of support.
2. a kind of horizontal shear of support measurement mechanism according to claim 1 is characterized in that, the material that said metal bar (4) uses comprises aluminium alloy, common straightcarbon steel, alloy steel.
3. a kind of horizontal shear of support measurement mechanism according to claim 1 is characterized in that the quantity of said pair of spherical ball (3) is more than 4.
4. a kind of horizontal shear of support measurement mechanism according to claim 1 is characterized in that, two radiuss of sphericity of said pair of spherical ball (3) are identical, and the centre of sphere line of two spheroids is the 1/3-1/2 of radius of sphericity in the length of two spheroid intersection.
5. one kind is used the described horizontal shear of support measurement mechanism of claim 1 to carry out the method that horizontal shear of support is measured, and it is characterized in that, may further comprise the steps:
Said horizontal shear of support measurement mechanism is installed between model to be measured and the former bearing, and model to be measured is fixed on the top board (1), and shaped as frame base plate (2) is fixed on the former bearing;
Measure the deformation quantity ε of metal bar (4) through foil gauge (5)
x, ε
y, measure the acceleration a of top board through accelerometer (6)
xAnd a
y, measure the cross-sectional area A of metal bar and the quality m of top board;
Pass through formula F
x=EA ε
x+ ma
xAnd F
y=EA ε
y+ ma
y, promptly get the vector of horizontal shear, wherein E is the elastic modulus of metal bar (4).
6. the method that a kind of horizontal shear of support according to claim 5 is measured is characterized in that the material that said metal bar (4) uses comprises aluminium alloy, common straightcarbon steel, alloy steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010195304XA CN101881675B (en) | 2010-05-31 | 2010-05-31 | Device and method for measuring horizontal shear of support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010195304XA CN101881675B (en) | 2010-05-31 | 2010-05-31 | Device and method for measuring horizontal shear of support |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101881675A CN101881675A (en) | 2010-11-10 |
| CN101881675B true CN101881675B (en) | 2012-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010195304XA Active CN101881675B (en) | 2010-05-31 | 2010-05-31 | Device and method for measuring horizontal shear of support |
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| CN (1) | CN101881675B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104006829A (en) * | 2014-05-20 | 2014-08-27 | 清华大学 | Shearing force measuring device and measuring method suitable for real-time dynamic hybrid tests |
| CN115953881B (en) * | 2023-03-13 | 2023-06-09 | 江苏百威发电设备有限公司 | Buffering and damping base of generator |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3693425A (en) * | 1970-04-30 | 1972-09-26 | Joseph M Starita | Force measuring apparatus |
| US3985025A (en) * | 1975-01-20 | 1976-10-12 | Ormond Alfred N | Shear measuring flexure isolated load cells |
| DE10055933A1 (en) * | 2000-11-10 | 2002-05-23 | Hbm Mes Und Systemtechnik Gmbh | Recorder for measuring applied forces has a rotationally symmetric body with measurement legs arranged between through holes on which strain gages are placed to measure shear forces, which are insensitive to load placement |
| CN201382828Y (en) * | 2009-03-30 | 2010-01-13 | 黄蓉 | Shearing force testing device |
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| CN101881675A (en) | 2010-11-10 |
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