CN106596018A - Large-span building structure multi-point synchronization vibration test method - Google Patents
Large-span building structure multi-point synchronization vibration test method Download PDFInfo
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- CN106596018A CN106596018A CN201611159415.9A CN201611159415A CN106596018A CN 106596018 A CN106596018 A CN 106596018A CN 201611159415 A CN201611159415 A CN 201611159415A CN 106596018 A CN106596018 A CN 106596018A
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- vibration
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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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- General Physics & Mathematics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention discloses a large-span building structure multi-point synchronization vibration test method. The method comprises steps that (1), measurement point arrangement, through large-span building structure characteristic analysis, multiple key segments needing vibration test are determined, and measurement points are respectively distributed at the key segments; (2), measurement point grouping, the measurement points are grouped according to an overlapped measurement point grouping mode, according to the overlapped measurement point grouping mode, each group has the identical-quantity measurement points, and adjacent groups have at least one overlapped measurement points; (4), vibration test, vibration test on each group is carried out to acquire test data; and (5), data analysis, the test data is analyzed, vibration parameters acquired through measurement before and after an overlapped measurement point are compared, and validity of the test data is determined. The method is advantaged in that the method is a vibration test mode on the basis of grouping, the at least one overlapped test point is distributed in the adjacent groups, evaluation and calibration are carried out through the vibration parameters of the overlapped measurement points, and validity of the test data can be effectively guaranteed.
Description
Technical field
The present invention relates to building construction vibration technical field of measurement and test, is specifically related to a kind of building structure multiple spot across type greatly same
Step method for testing vibration.
Background technology
At present, for the vibration-testing of large span architecture structure, mainly there are two kinds of technological means：
First, it is, by extensive vibration-testing apparatus, to carry out blanket type, all standing test, but this kind of test mode
Can there is following limitation：
(1) extensive vibration-testing apparatus are used simultaneously when, it is desirable to the stringent synchronization over time and space such as sensor, but
Long-time cooperation, can cause instrument error (such as GPS error), it is difficult to realize synchronism detection truly, test
Asynchronous can cause to test the data for obtaining inaccurate；(2) transmission of large-span structure difference section vibration cannot be accurately reflected
Characteristic；(3) extensive harvester is used simultaneously, power when needing long, it is long when collection, it is long when energy supply, while also can band
Carry out higher financial cost；(4) in actual large-span structure vibration-testing, due to vibration-testing harvester (such as sensor)
Quantity and power of test are limited, and measuring point quantity is more, coverage is wider, difficult to realize that all measuring points are carried out to survey simultaneously
Amount.
Second, it is under limited vibration-testing apparatus, to carry out packet test.Large-span structure is tested by packet mode
Vibratory response, although the quantity and power of test for solving the problems, such as vibration-testing harvester (such as sensor) is limited, but still
Can so there are some defects：(1) due to by instrument collection, analysis deviation, the shadow such as sensor damage or external environment disturbance
Ring, error can be produced in piecewise test process, constantly accumulation gradually increases error, can have a strong impact on the accurate of test data
Property, or even mistake；(2) due to the limitation and deficiency in piecewise test process, can cause to analyze the biography of large-span structure vibration
Pass characteristic to be forbidden, lose the meaning of large-span structure vibration-testing.
The content of the invention
In order to solve problem above, the present invention provides technical scheme below：
A kind of building structure Multipoint synchronous method for testing vibration across type greatly, comprises the steps：
(1) measuring point is laid：By to building structure signature analysis across type greatly, it is determined that needing the multiple passes for carrying out vibration-testing
Key section, in each critical section measuring point is laid；
(2) measuring point packet：The measuring point is grouped by measuring point packet mode is overlapped, it is equal comprising quantity in each group
Measuring point, and adjacent group has at least one to overlap measuring point；
(4) vibration-testing：Vibration-testing is carried out to each group, test data is obtained；
(5) data analysis：Flutter test data is analyzed, contrast overlaps the vibration ginseng measured twice before and after measuring point
Number, wherein, then it is efficiency test data when in front and back two-time vibration parameter error is less than certain value.
Further, the quantity of the measuring point in each group is two or three or four；The quantity for overlapping measuring point is one
It is individual or two or three..
Further, the vibration parameters include：Amplitude, remarkable mid-band frequency and power spectral density.
Further, when twice the amplitude error is less than 5% before and after overlap measuring point, the remarkable mid-band frequency is missed
Then it is efficiency test data when the power spectral density squared difference and error are less than 10% when difference is less than 5%.
Beneficial effect：(1) present invention carries out the mode of vibration-testing based on packet, and at least one weight is distributed in adjacent sets
Folded measuring point, and passed judgment on, calibrated by overlapping the vibration parameters of measuring point, effectively test data validity can be protected
Barrier, with strict control hierarchy data error in precision allowed band, the final accuracy for ensureing tall and slender structure integrated testability；
(2) using limited sensing device, it is effectively realized " synchronization " to all measuring points of dominant type building structure and measures, reaches " synchronization "
Effect；(3) extensive vibration acquisition device is avoided while using, significantly reduce financial cost；(4) adopted using layered vibration
Integrated mode, efficiency high, time-consuming short, harvester working loss is little, and supporting energy supply is relatively low, it is to avoid power when long,
When long collection, it is long when energy supply.
Description of the drawings
Fig. 1 is the flow chart of big across the type building structure Multipoint synchronous method for testing vibration of the present invention；
The first embodiment of big across the type building structure Multipoint synchronous method for testing vibration that Fig. 2 is provided for the present invention；
The second embodiment of big across the type building structure Multipoint synchronous method for testing vibration that Fig. 3 is provided for the present invention.
Specific embodiment
With reference to embodiment, the present invention will be further described, but the present invention is not limited to following examples.
With reference to Fig. 1, the invention provides one kind building structure Multipoint synchronous method for testing vibration across type greatly, walks including following
Suddenly：
(1) measuring point is laid：By to building structure signature analysis across type greatly, it is determined that needing the multiple passes for carrying out vibration-testing
Key section, in each critical section measuring point is laid；
Building is relevant to factors such as the response and the fabric structures that vibrate, the arrangement of measuring point be considered as fabric structure because
Element.One building structure, what position picking up its vibration signal from can just obtain expected effect, and this is one very heavy
The problem wanted.The pickup of vibration signal will lean on sensor to layout to realize, therefore sensor arrangement is at what position, is exactly one
Individual crucial work.
When a building is carried out vibration-testing research, generally require to arrange multiple measuring points, in general measuring point is healed
It is many, more can learn more about structure vibration when stress, strain and its deformation condition.But measuring point is the more, required instrument
Also the more, workload is also bigger for equipment.Accordingly, it would be desirable to reasonable Arrangement measuring point, arrangement is optimized to measuring point, i.e., with as far as possible few
Measuring point, obtains than more complete, rational test data in the case where experiment work amount is little.
When carrying out measuring point optimization and laying, carry out the signature analysis of building structure first, understand Architectural Structure Design feature and
Its structural system, for example, can analyze the design features such as build, span, the height of building structure.The method of testing institute of the present invention
Big across type building structure is directed to, building across type greatly typically refers to the building with large span, and for example span is more than 60m's
Building, can have according to the method for prior art and experience true for those skilled in the art the characteristics of across type building structure greatly
Fixed possible vibration state, will building structure basic horizontal Ground Split across type greatly into multiple critical sections, then in each critical section
Middle laying measuring point, each measuring point is distributed in horizontal type substantially.
(2) measuring point packet：The measuring point is grouped by measuring point packet mode is overlapped, the overlap measuring point packet mode
To include the equal measuring point of quantity in each group, and adjacent group has at least one to overlap measuring point；
Because tested big across type building structure build is larger, the number of sensors needed during measurement is more, adopts in the present invention
Vibration-testing is carried out with the mode of packet, the multiple measuring points determined in step (1) are divided into into multigroup, equal amount is included in each group
Measuring point, and adjacent group have at least one overlap measuring point, wherein, carrying out vibration survey for big across a type building structure
During examination, difference group overlaps measuring point number and can differ.
Further, for example can overlap a bit for 2 points as shown in Fig. 2 overlapping measuring point packet mode, i.e., per group in wrap
Containing two measuring points, and comprising the measuring point of an overlap in adjacent group, as shown in figure 3, the overlap measuring point packet mode is three
Point overlaps at 2 points, i.e., per group in comprising in three measuring points, and adjacent group comprising the measuring points of two overlaps, it is possible to understand that ground, institute
State overlap measuring point packet mode for example can also for 3 points overlap a bit, 4 points overlap 2 points etc., principle is more Chong Die with 2 points,
3 points of 2 points of overlaps are identical, and those of ordinary skill in the art can carry out according to actual needs selecting to overlap measuring point packet mode.
(4) vibration-testing：Vibration-testing is carried out to each group, test data is obtained；
Those of ordinary skill in the art can for example be referred to according to engineering test contract and effectively according to prior art
Technical regulation (specification) etc., vibration-testing is carried out to each group, vibration-testing sensor is arranged at selected measuring point, test is big
Across the Environmental Random Vibration of type building structure.
(5) data analysis：Flutter test data is analyzed, contrast overlaps the vibration parameters measured twice before and after measuring point
And for the evaluation of test data validity, wherein, then it is efficiency test when in front and back two-time vibration parameter error is less than certain value
Data.
Further, the vibration parameters include：Amplitude, remarkable mid-band frequency and power spectral density；Ensure to overlap
Two-time vibration test before and after measuring point has with width, with frequency and equivalent.
Specifically, the amplitude error is less than 5%, and the remarkable mid-band frequency error is less than 5%, the power spectrum
Then it is efficiency test data when density difference error of sum square is less than 10%.
Pass judgment on and calibrate based on the overlap measuring point in the test of different layers packet synchronization, by the way that setting is strict, science, efficient
Criterion is passed judgment on, to ensure the accuracy of zonal testing result, and successively management and control, until test is completed.Then each group vibration is surveyed
The efficiency test combined analysis that examination is obtained, obtain the vibration characteristics of dominant type building structure.
Specific case used herein is set forth to the principle and embodiment of the present invention, and above example is said
It is bright to be only intended to help the device and its core concept that understand the present invention；Simultaneously for one of ordinary skill in the art, foundation
The thought of the present invention, will change in specific embodiments and applications, and in sum, this specification content is not
It is interpreted as limitation of the present invention.
Claims (4)
1. one kind building structure Multipoint synchronous method for testing vibration across type greatly, comprises the steps：
(1) measuring point is laid：By to building structure signature analysis across type greatly, it is determined that needing the multiple keys for carrying out vibration-testing
Section, in each critical section measuring point is laid；
(2) measuring point packet：The measuring point is grouped by measuring point packet mode is overlapped, comprising the survey that quantity is equal in each group
Point, and adjacent group has at least one to overlap measuring point；
(4) vibration-testing：Vibration-testing is carried out to each group, test data is obtained；
(5) data analysis：Flutter test data is analyzed, contrast overlaps the vibration parameters measured twice before and after measuring point, its
In, then it is efficiency test data when in front and back two-time vibration parameter error is less than certain value.
2. as described in claim 1 big across type building structure Multipoint synchronous method for testing vibration, wherein, the measuring point in each group
Quantity be two or three or four；The quantity for overlapping measuring point is one or two or three..
3. as described in claim 1 big across type building structure Multipoint synchronous method for testing vibration, wherein, the vibration parameters
Including：Amplitude, remarkable mid-band frequency and power spectral density.
4. the different layer of dominant type building structure as described in claim 3 vibrates Multipoint synchronous method for testing vibration, wherein, overlap
When twice the amplitude error is less than 5% before and after measuring point, when the remarkable mid-band frequency error is less than 5%, the power
Then it is efficiency test data when spectrum density squared difference and error are less than 10%.
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| CN101034046A (en) * | 2006-12-29 | 2007-09-12 | 苏州东菱振动试验仪器有限公司 | Method for lowering quality factoring in vibration environment |
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2016
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Patent Citations (3)
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| JP2006194723A (en) * | 2005-01-13 | 2006-07-27 | Nissan Motor Co Ltd | Method for identifying exciting force and computer readable recording medium |
| CN101034046A (en) * | 2006-12-29 | 2007-09-12 | 苏州东菱振动试验仪器有限公司 | Method for lowering quality factoring in vibration environment |
| CN202372325U (en) * | 2011-11-08 | 2012-08-08 | 山西省交通科学研究院 | Vibration and static and dynamic strain signal wireless data acquisition system for bridge |
Non-Patent Citations (2)
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| 夏禾: "《铁路桥梁养护维修》", 30 November 2010 * |
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