CN107340111B - Rotating vibration test platform for the test of Composite Cylindrical Shell constant wave vibration - Google Patents
Rotating vibration test platform for the test of Composite Cylindrical Shell constant wave vibration Download PDFInfo
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- CN107340111B CN107340111B CN201710548540.7A CN201710548540A CN107340111B CN 107340111 B CN107340111 B CN 107340111B CN 201710548540 A CN201710548540 A CN 201710548540A CN 107340111 B CN107340111 B CN 107340111B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
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Abstract
The present invention relates to composite structure vibration test technology fields, provide a kind of rotating vibration test platform for the test of Composite Cylindrical Shell constant wave vibration, including remote drive, cylindrical shell clamping device, launch exciting bank, laser circumference scanning means and laser vibration measurer, laser circumference scanning means is used cooperatively with laser vibration measurer, by changing laser optical path, the vibration information hit after vibration to cylindrical shell is acquired, laser circumference scanning means can be with axial feed, and it can be with hollow shaft, belt wheel rotates jointly, to realize to cylindrical shell difference, the vibration information of different cross section is acquired.The device of the invention is at low cost, and the service life is long, and test requirements document is few, is suitble to the whirling vibration situation of overwhelming majority Composite Cylindrical Shell constant wave vibration test, can take multiple measurements, reduces test error.
Description
Technical field
The present invention relates to composite structure vibration test technology fields, and in particular to one kind can be used in composite material circle
The rotating vibration test platform of column shell constant wave vibration test.
Background technique
Composite Cylindrical Shell has the characteristics that light weight, corrosion-resistant, insulating properties, at present just relative to metal cylindrical shell
Being increasingly being applied to, aerospace, ship, ocean engineering, petrochemical industry, weapons manufacture and nuclear industry etc. are important
Field.Although Composite Cylindrical Shell has very big strength and stiffness, but vibration problem is also very prominent, is being rotated about its center axis
In the process, if simultaneously by external drive in the case where, constant wave vibration will be generated.Especially Thin-Wall Cylindrical Shells, by compared with
When strong excitation, large-amplitude oscillation will be generated, this can make it easier to destroy.So carrying out constant wave vibration survey to cylindrical shell
Examination is just particularly important.
Currently, people carry out the actually rare of constant wave vibration Test And Research Work to Composite Cylindrical Shell, it is main former
Because be due under rotation status excitation method and vibration measuring means be difficult to solve.Conventional current vortex and electromagnetic exciting, often
It is only applicable to the excitation (since composite material casing is difficult to generate vortex or electromagnetic induction effect) of metal shell, and large size is turned
Dynamic metal-back exciting then needs very big electromagnetic field or eddy current effect, and it is lesser that the above method is only applicable to size under normal circumstances
Metal cylindrical shell.In addition, the rotating vibration test platform of previous people's design, generallys use current vortex sensor, slip ring draws electric-type
Strain transducer or acceleration transducer carry out vibration measurement, and aforesaid way is collected cylindrical shell by the vibration information after hitting vibration
Inaccurate, measuring point can not change position in shell rotary course, cause constant wave vibration test result inadequate once fixing
Comprehensively, and due to the influence of sensor additional mass, the accuracy of constant wave vibration test is also influenced to a certain extent.
Vibration measurement with laser is a kind of emerging vibration test technology, can be quick by whole audience Scan laser measure instrument, quasi-
Really obtain the Mode Shape of almost plane structure.But for Composite Cylindrical Shell structure, this whole audience scanning type laser
Vibration measuring is also unable to satisfy test request.In view of the deficienciess of the prior art, the present invention provides one kind for composite material cylinder
The rotating vibration test platform of shell constant wave vibration test
Summary of the invention
In view of the deficienciess of the prior art, the present invention provide it is a kind of for Composite Cylindrical Shell constant wave vibration test
Rotating vibration test platform.
Specific technical solution is as follows:
For the rotating vibration test platform of Composite Cylindrical Shell constant wave vibration test, including remote drive, circle
Column shell clamping device, ejection exciting bank, laser circumference scanning means and laser vibration measurer；The laser circumference scanning means with
Laser vibration measurer is used cooperatively, and by changing laser optical path, the vibration information hit after vibration to cylindrical shell is acquired, the laser
Circumferential scanning device can be with axial feed, and can rotate jointly with hollow shaft, belt wheel, realizes to cylindrical shell difference, difference
The vibration information in section is acquired；
The remote drive includes double-axis motor, and double-axis motor both ends shaft passes through axis and band respectively
Wheel one, belt wheel two connect；The cylindrical shell clamping device is mounted in hollow shaft, and the hollow shaft is fixed by bearing block, hollow
Axis one end is connect with belt wheel three, and the other end is connect with belt wheel four；The belt wheel one is connect with belt wheel four by conveyer belt one, belt wheel
Two are connect with belt wheel three by conveyer belt two；The ejection exciting bank is mounted on the side of cylindrical shell clamping device；It is described to swash
Flash ranging Vibration Meter is fixed on the outside of belt wheel four, center and the hollow shaft central alignment；The ejection exciting bank is mounted on
On testing stand table top, positioned at the side of cylindrical shell.
Double-axis motor both ends shaft is connect with axis by shaft coupling, and the axis and belt wheel one, belt wheel two are using flat
Key connection, hollow shaft are connect with belt wheel three, belt wheel four using flat key.
Dovetail groove is set on the table top of the ejection exciting bank bottom, and rotational handle, ejection exciting bank can be along dovetail groove
Guide rail is axially moved.
The ejection exciting bank, which can emit, hits vibration hand hammer, it is made to hit vibration to high-speed rotating cylindrical shell, and it is big to hit vibration power
Small adjustable and control.
Rotating vibration test platform application method for the test of Composite Cylindrical Shell constant wave vibration is as follows:
(1) according to the geometric dimension of cylindrical shell, the position of cylindrical shell clamping device is adjusted, cylindrical shell is stablized into clamping and is being tried
It tests on platform；
(2) start laser vibration measurer, be irradiated to laser on reflective mirror through hollow shaft, be reflected on cylindrical shell surface later
Certain point；
(3) ball screw arrangement for adjusting laser scanning device rear end, is located at the reflective mirror for being mounted on the device front end
Suitable position in axial direction, to make laser through the tested point on mirror reflection to cylindrical shell surface, reflective mirror and cylindrical shell
Can synchronous rotary so that laser reflection point can follow measurement point realize measurement；
(4) start motor, drive cylindrical shell through clamping device by the transmission system of testing stand, high speed rotation；
(5) position for adjusting ejection exciting bank, determines and suitably hits vibration point；
(6) the drawing lever fixing apparatus on ejection exciting bank is adjusted, determines and suitably hits vibration power size；
(7) pull the pull rod of ejection exciting bank to arrive fixed position, power on, make ejection exciting bank to cylindrical shell into
Row hits vibration；
(8) laser vibration measurer will collect information and be transmitted to analyzer analysis result；
(9) step (6)-(8) are repeated, are repeatedly tested, test error is reduced；
(10) starting is mounted on the motor of circumferential scanning device reflective mirror rear end, and reflective mirror and cylindrical shell is made to realize that differential turns
It is dynamic, and pass through the ball screw arrangement of the device rear end, change the axial position of reflective mirror, so as to survey in a certain range
Measure the Vibration Condition in any one section of cylindrical shell.
This method have the advantage that:
(1) cylindrical shell Special clamping device can make in a certain range the cylindrical shell of different-diameter during the test can
It accesses and stablizes effective clamping, meanwhile, outside clamps while being supported to cylindrical shell inboard, can avoid to cylinder
Shell damages.Traditional cylindrical shell clamping device cannot generally be adjusted the size for clamping diameter or can be to the surface of cylindrical shell
Certain destruction is caused, the present apparatus can effectively overcome the two disadvantages, realize and stablize effective clamping to cylindrical shell.
(2) ejection exciting bank can control the size that vibration power is hit in test every time by switching device in the present invention,
So as to repeat to test, multi-group data is measured, to reduce test error.The changeable position for hitting vibration of the present invention, revolves high speed
The different location of the cylindrical shell turned carries out hitting vibration then analysis data, makes measurement result with more generality, furthermore design is hit
It shakes hand hammer fixing lock, can effectively prevent to cause cylindrical shell secondary to hit vibration.
(3) circumferential scanning device can accurately and rapidly measure certain on cylindrical shell by being used cooperatively with laser vibration measurer
The vibration in a point or some section, and the change measurement position that can be convenient, the position of reflective mirror is also adjustable, makes to survey
The position of amount point can be changed according to the requirement of experimenter, similarly reduce the contingency of test result.
(4) the device of the invention is at low cost, and the service life is long, and test requirements document is few, is suitble to overwhelming majority Composite Cylindrical Shell row
The whirling vibration situation of wave vibration-testing.It can take multiple measurements, reduce test error.
Detailed description of the invention
Fig. 1 is the front view of rotating vibration test platform of the present invention；
Fig. 2 is the ejection exciting bank top view of rotating vibration test platform of the present invention；
Fig. 3 is the laser circumference scanning means top view of rotating vibration test platform of the present invention；
Fig. 4 is the shaft side figure of elastic excitation device of the present invention；
Fig. 5 is the shaft side figure of the rotating vibration test platform after fixing composite material cylindrical shell of the present invention；
Fig. 6 is the pull rod fixing device schematic diagram of present invention ejection exciting bank.
In figure: 1- belt wheel one, 2- shaft coupling, 3- double-axis motor, 4- conveyer belt one, 5- belt wheel two, 6- laser vibration measurer,
7- belt wheel three, 8- conveyer belt two, 9- cylindrical shell clamping device, 10- launch exciting bank, and 11- draws lever fixing apparatus, 12- bearing
Seat, 13- belt wheel four, 14- laser circumference scanning means, 15- handle, 16- pull rod, 17- hit vibration force control device, and it is small that 18- hits vibration
Hammer, 19- bar, 20- hit vibration hand hammer fixing lock, 21- gear, 22- reflective mirror, 23- decelerating motor, 24- ball-screw.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawing.Fig. 1 is the front view of rotating vibration test platform of the present invention；Figure
2 be the ejection exciting bank top view of rotating vibration test platform of the present invention；Fig. 3 is the laser circle of rotating vibration test platform of the present invention
All scanning means top views；Fig. 4 is the shaft side figure of elastic excitation device of the present invention；Fig. 5 is fixing composite material cylinder of the present invention
The shaft side figure of rotating vibration test platform after shell；Fig. 6 is the pull rod fixing device schematic diagram of present invention ejection exciting bank.
As shown, the rotating vibration test platform for the test of Composite Cylindrical Shell constant wave vibration, including pass at a distance
Dynamic device, cylindrical shell clamping device 9, ejection exciting bank 10, laser circumference scanning means 14 and laser vibration measurer 6；Laser circle
All scanning means 14 are used cooperatively with laser vibration measurer 6, by change laser optical path, to cylindrical shell hit vibration after vibration information into
Row acquisition, laser circumference scanning means 14 can be rotated jointly with axial feed with hollow shaft, belt wheel, be realized to cylindrical shell
Difference, different cross section vibration information be acquired；
Remote drive includes double-axis motor 3,3 both ends shaft of double-axis motor pass through respectively axis and belt wheel 1,
Belt wheel 25 connects；The cylindrical shell clamping device 9 is mounted in hollow shaft, and the hollow shaft is fixed by bearing block, hollow shaft one
End is connect with belt wheel 37, and the other end is connect with belt wheel 4 13；The belt wheel 1 is connect with belt wheel 4 13 by conveyer belt 1,
Belt wheel 25 is connect with belt wheel 37 by conveyer belt 28；The ejection exciting bank 10 is mounted on testing stand table top, is located at circle
The side of column shell；The laser vibration measurer 6 is fixed on the outside of belt wheel 4 13, center and the hollow shaft central alignment；Institute
Laser circumference scanning means 14 is stated to be fixed on 37 side of hollow shaft upper belt-wheel.
3 both ends shaft of double-axis motor is connect with axis by shaft coupling 2, and the axis and belt wheel 1, belt wheel 25 are using flat
Key connection, hollow shaft are connect with belt wheel 37, belt wheel 4 13 using flat key.
Dovetail groove is set on ejection 10 bottom table top of exciting bank, and rotational handle 15, ejection exciting bank 10 can be along dovetail
Slot guide rail is axially moved.
Ejection exciting bank 10, which can emit, hits vibration hand hammer 18, so that it is hit vibration to high-speed rotating cylindrical shell, and it is big to hit vibration power
Small adjustable and control.
Rotating vibration test platform application method for the test of Composite Cylindrical Shell constant wave vibration is as follows:
(1) according to the geometric dimension of cylindrical shell, the position of cylindrical shell clamping device 9 is adjusted, cylindrical shell is stablized into clamping and is existed
On testing stand；
(2) start laser vibration measurer 6, be irradiated to laser on reflective mirror 22 through hollow shaft, be reflected into cylindrical shell table later
Certain point on face；
(3) 24 structure of ball-screw for adjusting 14 rear end of laser circumference scanning means, makes to be mounted on the anti-of the device front end
Light microscopic 22 is located at axial suitable position, so that laser is made to be reflected into tested point on cylindrical shell surface through reflective mirror 22, because
Entire laser scanning device is fixed in hollow shaft, thus reflective mirror 22 and cylindrical shell can synchronous rotary so that laser is anti-
Exit point can follow measurement point to realize measurement；
(4) start double-axis motor 3, drive cylindrical shell through cylindrical shell clamping device 9 by the transmission system of testing stand,
High speed rotation；
(5) position for adjusting ejection exciting bank 10, determines and suitably hits vibration point；
(6) the drawing lever fixing apparatus 11 on ejection exciting bank 10 is adjusted, determines and suitably hits vibration power size；
(7) it pulls the pull rod 16 of ejection exciting bank 10 to arrive fixed position, powers on, make to launch 10 pairs of circles of exciting bank
Column shell carries out hitting vibration；
(8) laser vibration measurer 6 will collect information and be transmitted to analyzer analysis result；
(9) step (6)-(8) are repeated, are repeatedly tested, test error is reduced；
(10) starting is mounted on the motor of 22 rear end of reflective mirror of laser circumference scanning means 14, can make reflective mirror 22 and circle
Column shell realizes differential rotation, and passes through 24 structure of ball-screw of the device rear end, changes the axial position of reflective mirror 22, from
And the Vibration Condition in any one section of cylindrical shell can be measured in a certain range.
Claims (4)
1. the rotating vibration test platform for the test of Composite Cylindrical Shell constant wave vibration, it is characterised in that: including passing at a distance
Dynamic device, cylindrical shell clamping device, ejection exciting bank, laser circumference scanning means and laser vibration measurer；The laser circumference
Scanning means is used cooperatively with laser vibration measurer, and by changing laser optical path, the vibration information hit after vibration to cylindrical shell is adopted
Collection, the laser circumference scanning means can be with axial feed, and can rotate jointly with hollow shaft, belt wheel, realizes to cylindrical shell
Difference, different cross section vibration information be acquired；
The remote drive includes double-axis motor, and double-axis motor both ends shaft passes through axis and belt wheel respectively
One, belt wheel two connects；The cylindrical shell clamping device is mounted in hollow shaft, and the hollow shaft is fixed by bearing block, hollow shaft
One end is connect with belt wheel three, and the other end is connect with belt wheel four；The belt wheel one is connect with belt wheel four by conveyer belt one, belt wheel two
It is connect with belt wheel three by conveyer belt two；The ejection exciting bank is mounted on the side of cylindrical shell clamping device；The laser
Vialog is fixed on the outside of belt wheel four, center and the hollow shaft central alignment；The ejection exciting bank is mounted on examination
It tests on platform table top, positioned at the side of cylindrical shell, dovetail groove, rotational handle, bullet is set on the table top of the ejection exciting bank bottom
Penetrating exciting bank can be axially moved along dovetail groove guide rail.
2. the rotating vibration test platform for the test of Composite Cylindrical Shell constant wave vibration as described in claim 1, feature
Be: double-axis motor both ends shaft is connect with axis by shaft coupling, and the axis and belt wheel one, belt wheel two are connected using flat key
It connects, hollow shaft is connect with belt wheel three, belt wheel four using flat key.
3. the rotating vibration test platform for the test of Composite Cylindrical Shell constant wave vibration as described in claim 1, feature
Be: the ejection exciting bank, which can emit, hits vibration hand hammer, it is made to hit vibration to high-speed rotating cylindrical shell, and hitting vibration power size can
Regulation and control.
4. the rotating vibration test platform application method for the test of Composite Cylindrical Shell constant wave vibration as described in claim 1
It is as follows:
(1) according to the geometric dimension of cylindrical shell, the position of cylindrical shell clamping device is adjusted, cylindrical shell is stablized into clamping in testing stand
On；
(2) start laser vibration measurer, be irradiated to laser on reflective mirror through hollow shaft, be reflected into certain on cylindrical shell surface later
Point；
(3) ball screw arrangement for adjusting laser scanning device rear end is located at the reflective mirror for being mounted on the device front end axial
Upper suitable position, to make laser through the tested point on mirror reflection to cylindrical shell surface, reflective mirror can be same with cylindrical shell
Step rotation, so that laser reflection point can follow measurement point to realize measurement；
(4) start motor, drive cylindrical shell through clamping device by the transmission system of testing stand, high speed rotation；
(5) position for adjusting ejection exciting bank, determines and suitably hits vibration point；
(6) the drawing lever fixing apparatus on ejection exciting bank is adjusted, determines and suitably hits vibration power size；
(7) it pulls the pull rod of ejection exciting bank to fixed position, powers on, hit ejection exciting bank to cylindrical shell
Vibration；
(8) laser vibration measurer will collect information and be transmitted to analyzer analysis result；
(9) step (6)-(8) are repeated, are repeatedly tested, test error is reduced；
(10) starting is mounted on the motor of circumferential scanning device reflective mirror rear end, and reflective mirror and cylindrical shell is made to realize differential rotation,
And the ball screw arrangement for passing through the device rear end, changes the axial position of reflective mirror, so as to measure in a certain range
The Vibration Condition in any one section of cylindrical shell.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710548540.7A CN107340111B (en) | 2017-07-07 | 2017-07-07 | Rotating vibration test platform for the test of Composite Cylindrical Shell constant wave vibration |
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| CN201710548540.7A CN107340111B (en) | 2017-07-07 | 2017-07-07 | Rotating vibration test platform for the test of Composite Cylindrical Shell constant wave vibration |
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| CN107340111B true CN107340111B (en) | 2019-04-05 |
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| CN109000866B (en) * | 2018-06-07 | 2019-10-25 | 东北大学 | Unmanned plane answers material wing dynamic characteristic and damage check equipment under dust storm-thermal environment |
| CN109029890B (en) * | 2018-08-28 | 2020-04-17 | 东北大学 | Fiber reinforced composite thin shell rotary vibration test stand considering uniformity and temperature gradient |
| CN109186742A (en) * | 2018-09-30 | 2019-01-11 | 华南理工大学 | A kind of the cylindrical annular shell vibration detection control device and method of view-based access control model |
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| US5450748A (en) * | 1994-02-28 | 1995-09-19 | Maxwell Dynamometer Systems, Inc. | Multiple function chassis dynamometer and method |
| KR101369212B1 (en) * | 2012-08-01 | 2014-03-27 | 한국과학기술원 | Laser ultrasonic imaging of a rotating blade |
| CN103528667B (en) * | 2013-10-23 | 2015-05-20 | 东北大学 | Laser scanning based cylindrical shell modal shape testing device and method |
| CN105798874B (en) * | 2016-05-25 | 2017-11-17 | 盐城市高跃机械有限公司 | A kind of new-energy automobile wheel hub captures industrial robot |
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