CN110406559A - A method of identification railway track structure modal characteristics - Google Patents
A method of identification railway track structure modal characteristics Download PDFInfo
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- CN110406559A CN110406559A CN201910542320.2A CN201910542320A CN110406559A CN 110406559 A CN110406559 A CN 110406559A CN 201910542320 A CN201910542320 A CN 201910542320A CN 110406559 A CN110406559 A CN 110406559A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
- B61K9/00—Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles
- B61K9/08—Measuring installations for surveying permanent way
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Abstract
A method of identification railway track structure modal characteristics, comprising the following steps: arrange multiple sensors on the railroad track, the position of each sensor is as a measuring point；The excitation point that selected section or whole measuring points are tapped as power hammer；When hammering the percussion excitation point into shape with the power, the response condition of the measuring point, and then the modal characteristics for analyzing the railway track structure are recorded by the multiple sensor；Fixed multiple fastener spacing are selected on the railroad track, as test scope, for arranging the measuring point；The test scope is fixed, and the position of the measuring point is fixed.Test frequency range of the present invention is big, it tests high-quality, the vertical and lateral modal characteristics of rail can effectively be recognized, testing efficiency is high, it can fulfil assignment within the maintenance window phase, it is comparative good between the test data repeatedly tested, effective comparative analysis can be carried out to the test data of different time and different location.
Description
Technical field
The present invention relates to technical field of rail traffic more particularly to a kind of sides for recognizing railway track structure modal characteristics
Method.
Background technique
Rail mode is the embodiment of railway track structure quasi-mode feature, and the intrinsic dynamics of reaction rail structure is special
Sign to analysis track structure kinetic characteristics, optimization track structure and component design parameters, discloses track structure and component power
Hurt mechanism etc. is learned to be of great significance, thus track structure modal characteristics discrimination method and system be it is highly important,
The modal characteristics identification of rail is divided into the vertical and lateral modal characteristics of rail and recognizes two classes, is all made of Hammering Test method, existing steel
Rail modal characteristics discrimination method has the drawback that
First from rail vertical mode point layout, point layout range L is not clear, when test by rule of thumb with
Machine setting, if measuring point range is small, can not the lower mode feature of validity test rail can be dropped significantly if measuring point range is excessive
Low testing efficiency；Power hammer excitation point position sum number amount is not known, and when test is randomly provided by rule of thumb, if excitation point is very little or excessively
It concentrates, then data are poor, can not effectively obtain modal characteristics；If excitation point is too many, testing efficiency equally will be greatly reduced；It adopts
With measuring point is equally spaced, measuring point spacing is 0.5 fastener spacing, and vertical test modal frequency effective range is 0~1500Hz,
Because measuring point is not enough, it is unable to test the modal characteristics of higher frequency；Since point layout range L, excitation point position is not known
And quantity, therefore the comparativity between test data is poor, does not have between the test result tested in multiple detection cycles
Comparativity, the variation detected not can determine that structure itself is changed or because between the excitation point repeatedly tested
Difference caused by.
Furthermore in view of rail transverse direction mode point layout, point layout range L is not clear, when test by rule of thumb
Be randomly provided, it is big by laboratory technician's man's activity, if measuring point range is small, can not validity test rail lower mode feature, pole can
Important test point can be missed；If measuring point range is excessive, testing efficiency will be greatly reduced, when on-line testing, the test window phase
Time is short, most probably cannot once survey, it may be necessary to arrangement measuring point be repeated several times and tested；Power hammer excitation point position sum number
Amount is not known, and when test is randomly provided by rule of thumb, if excitation point is very little or excessively concentrates, data are poor, can not effectively obtain
Modal characteristics；If excitation point is too many, testing efficiency equally will be greatly reduced；Using being equally spaced measuring point, measuring point spacing is
0.5 fastener spacing, transverse test modal frequency effective range are 0~600Hz, are unable to test the modal characteristics of higher frequency；
Since point layout range L, excitation point position and quantity is not known, the comparativity between test data is poor.
In conclusion that there are testing efficiencies is low, test is of poor quality, the comparative difference of test data and test for existing test method
The disadvantages of frequency range is small.
Summary of the invention
(1) goal of the invention
To solve technical problem present in background technique, the present invention proposes a kind of identification railway track structure modal characteristics
Method, test frequency range is big, test it is high-quality, can effectively recognize the vertical and lateral modal characteristics of rail, testing efficiency
Height can fulfil assignment in maintenance time window, comparative good between test data, can be to different time and different location
Test data carries out effective comparative analysis.
(2) technical solution
To solve the above problems, the invention proposes a kind of methods for recognizing railway track structure modal characteristics, comprising:
Multiple sensors are arranged on the railroad track, and the position of each sensor is as a measuring point；
The excitation point that selected section or whole measuring points are tapped as power hammer；
When hammer of exerting oneself taps the excitation point, the response condition of measuring point is recorded by multiple sensors, and then for dividing
Analyse the modal characteristics of railroad track；
Fixed multiple fastener spacing are selected on the railroad track, as test scope, for arranging measuring point；
Test scope is fixed, and the position of measuring point is fixed.
Above-mentioned technical proposal of the invention has following beneficial technical effect:
Point position is fixed, and test frequency range is big, can modal characteristics within the scope of 0~1500Hz of validity test rail；
It tests high-quality, can effectively recognize the vertical and lateral modal characteristics of rail；Testing efficiency is high, can be complete in maintenance time window
At operation；It is comparative good between test data, the test data of different time and different location can be carried out effectively to score
Analysis.
Detailed description of the invention
Fig. 1 is one of vertical mode point layout in the method for identification railway track structure modal characteristics proposed by the present invention
The structural schematic diagram of a example.
Fig. 2 is one of lateral mode point layout in the method for identification railway track structure modal characteristics proposed by the present invention
The structural schematic diagram of a example.
Fig. 3 is each region measuring point in test scope in the method for identification railway track structure modal characteristics proposed by the present invention
The structural schematic diagram of one example of arrangement.
Fig. 4 is lateral high order mode point layout in the method for identification railway track structure modal characteristics proposed by the present invention
An example structural schematic diagram.
Specific embodiment
In order to make the objectives, technical solutions and advantages of the present invention clearer, With reference to embodiment and join
According to attached drawing, the present invention is described in more detail.It should be understood that these descriptions are merely illustrative, and it is not intended to limit this hair
Bright range.In addition, in the following description, descriptions of well-known structures and technologies are omitted, to avoid this is unnecessarily obscured
The concept of invention.
Fig. 1 is one of vertical mode point layout in the method for identification railway track structure modal characteristics proposed by the present invention
The structural schematic diagram of a example.
Fig. 2 is one of lateral mode point layout in the method for identification railway track structure modal characteristics proposed by the present invention
The structural schematic diagram of a example.
Combined with Figure 1 and Figure 2, in the method for identification railway track structure modal characteristics of the invention, on the railroad track
Arrange multiple sensors, the position of each sensor is as a measuring point；What selected section or whole measuring points were tapped as power hammer
Excitation point；When firmly hammer taps excitation point, the stress condition of measuring point is recorded by multiple sensors, and then for analyzing railway
The modal characteristics of track；Fixed multiple fastener spacing are selected on the railroad track, as test scope, for arranging measuring point；
Test scope is fixed, and the position of measuring point is fixed.
It in one embodiment of the invention, may include being located at it shown in the L in test scope, such as Fig. 1 and Fig. 2
The middle section in center, such as Fig. 1 and the area A shown in Fig. 2.Test scope can also include a pair of centrally located region two sides
Or multipair symmetrical region, such as Fig. 1 and the area symmetrical region B1 shown in Fig. 2, the area B2, the area symmetrical region C1, the area C2, symmetrical area
The domain area D1, the area D2 etc..
Preferably, in Fig. 1 and example shown in Fig. 2, test scope L is 24 fasteners spacing d, middle section A
Area and the area symmetrical region B1, the area B2 are two fastener spacing, and the area symmetrical region C1, the area C2 are three fastener spacing,
The area symmetrical region D1, the area D2 are six fastener spacing.
In one embodiment of the invention, the measuring point in middle section can obtain more than the point layout in symmetrical region
Closely.Such as in Fig. 1 and example shown in Fig. 2, test scope L arranges 31 along railroad track length direction altogether from left to right
A measuring point, wherein the area A, the area B1, the area B2, the area C1, the area C2, the area D1, the area D2 end be not repeatedly disposed with a measuring point,
Seven measuring points have also been evenly arranged in the area middle section A, the area symmetrical region B1, the area B2 are also evenly arranged respectively there are three measuring point,
Measuring point there are two being also evenly arranged in the area symmetrical region C1, the area C2, the area symmetrical region D1, the area D2 have also been evenly arranged three respectively
A measuring point.It may be noted that in Fig. 1 and example shown in Fig. 2, although in the area measuring point ratio D1 arranged in the area C1, the area C2, the area D2
The measuring point of arrangement is few, but short more of length in the area C1, the area ratio D1, the area C2, the area D2, is still the area C1 in inside, C2 therefore
Area is closeer than the measuring point arranged in the area D1 in outside, the area D2.
Preferably, in Fig. 1 and example shown in Fig. 2, in conjunction with Fig. 3, in 31 measuring points in total, from left to right
One measuring point, the 4th measuring point, the 6th measuring point, the 8th measuring point, the 11st measuring point, the 14th measuring point, the 16th
Measuring point, the 20th measuring point, the 23rd measuring point, the 27th measuring point, the 30th measuring point are chosen to be excitation point.
Fig. 3 is each region measuring point in test scope in the method for identification railway track structure modal characteristics proposed by the present invention
The structural schematic diagram of one example of arrangement.
In one embodiment of the invention, the mode of measuring point and excitation point is arranged in middle section, for example, Fig. 1, Fig. 2,
The mode of the measurement of the area A arrangement and excitation point in example shown in Fig. 3, for testing the vertical pinned-pinned of railroad track
Mode and transverse direction pinned-pinned mode.At this point, a pair of of symmetrical region on the outside of middle section, for example, it is Fig. 1, shown in Fig. 2
The area example Zhong B1, the area B2, the elongated area as pinned-pinned test.
In one embodiment of the invention, measuring point is arranged in middle section and close to a pair of of symmetrical region of middle section
With the mode of excitation point, for example, the area A and the area B1 in Fig. 1, Fig. 2, example shown in Fig. 3, the arrangement measurement of the area B2 and excitation point
Mode, for testing the vertical lower mode of railroad track.At this point, this is to the symmetrical area of another pair adjacent on the outside of symmetrical region
Domain, such as Fig. 1, Fig. 2, the area example Zhong C1 shown in Fig. 3, the area C2, the elongated area as vertical lower mode.
In one embodiment of the invention, in middle section, close to a pair of of symmetrical region of middle section and this is right
The mode of adjacent second pair of symmetrical region arrangement measuring point and excitation point on the outside of symmetrical region, for example, Fig. 1, Fig. 2, shown in Fig. 3
The area A and the area B1, the area B2, the area C1, the arrangement measurement of the area C2 and the mode for motivating point in example, for testing the transverse direction of railroad track
Lower mode.At this point, adjacent third is to symmetrical region, such as Fig. 1, Fig. 2, reality shown in Fig. 3 on the outside of second pair of symmetrical region
The area example Zhong D1, the area D2, the elongated area as lateral lower mode.
In one embodiment of the invention, when testing the vertical mode of railroad track, sensor arrangement is in railroad track
Rail top, test frequency may range from 0 to 1500Hz.
In one embodiment of the invention, when testing the lateral lower mode of railroad track, sensor arrangement is in railway
The rail head of track, test frequency may range from 0-700Hz.
Fig. 4 is lateral high order mode point layout in the method for identification railway track structure modal characteristics proposed by the present invention
An example structural schematic diagram.
It, can be in the rail of middle section in one embodiment that railroad track transverse direction high order mode of the invention is tested
Multiple measuring points are respectively arranged along railroad track length direction on head, the web of the rail and rail bottom.The test frequency range of high order mode test
It can be 400-1500Hz.
For example, in the example shown in fig. 4, it is preferred that the area middle section A is two fastener spacing, in the area middle section A
Rail head, the web of the rail both ends and both ends between can be evenly arranged nine measuring points respectively.Each of rail bottom in the area middle section A
Fastener node location does not arrange measuring point, it is preferred that is evenly arranged three in each fastener spacing of the rail bottom in the area middle section A
A measuring point, then, the rail bottom in the area middle section A arranges six measuring points altogether.
In the example shown in fig. 4, in nine measuring points of the rail head arrangement of middle section, it is preferred that from left to right first
A measuring point, third measuring point, the 5th measuring point, the 6th measuring point, the 9th measuring point are excitation point.The web of the rail of middle section is arranged
Nine measuring points in, it is preferred that second measuring point, the 7th measuring point are excitation point from left to right.The rail bottom of middle section is arranged
Six measuring points in, it is preferred that first measuring point, second measuring point are excitation point from left to right.
Point position of the present invention is fixed, and test frequency range is big, can be within the scope of 0~1500Hz of validity test railroad track
Modal characteristics；It tests high-quality, can effectively recognize the vertical and lateral modal characteristics of railroad track；Testing efficiency is high, can be
It fulfils assignment in maintenance time window；It is comparative good between test data, can test data to different time, different location into
Effective comparative analysis of row etc..
It should be understood that above-mentioned specific embodiment of the invention is used only for exemplary illustration or explains of the invention
Principle, but not to limit the present invention.Therefore, that is done without departing from the spirit and scope of the present invention is any
Modification, equivalent replacement, combination, improvement etc., should all be included in the protection scope of the present invention.In addition, right appended by the present invention
It is required that being intended to cover the whole changes fallen into attached claim scope and boundary or this range and the equivalent form on boundary
Change and modification.
Claims (13)
1. a kind of method for recognizing railway track structure modal characteristics, which comprises the following steps:
Multiple sensors are arranged on the railroad track, and the position of each sensor is as a measuring point；
The excitation point that selected section or whole measuring points are tapped as power hammer；
When hammering the percussion excitation point into shape with the power, the response condition of the measuring point is recorded by the multiple sensor, into
And it is used to analyze the modal characteristics of the railroad track；
Wherein, fixed multiple fastener spacing are selected on the railroad track, as test scope, for arranging the survey
Point；
And the test scope is fixed, and the position of the measuring point is fixed.
2. the method for identification railway track structure modal characteristics according to claim 1, which is characterized in that the test model
Enclose the middle section including being located at the test scope, and one or more pairs of symmetrical areas positioned at the test scope two sides
Domain；The measuring point in the middle section obtains closer than the point layout in the symmetrical region.
3. the method for identification railway track structure modal characteristics according to claim 2, which is characterized in that the symmetrical area
Domain include close to the middle section first pair of symmetrical region, second pair on the outside of first pair of symmetrical region it is symmetrical
Region and third on the outside of second pair of symmetrical region are to symmetrical region.
4. the method for identification railway track structure modal characteristics according to claim 3, which is characterized in that the test model
It encloses for 24 fastener spacing, each symmetrical region in the middle section and first pair of symmetrical region is
Two fastener spacing, each symmetrical region in second pair of symmetrical region is three fastener spacing, and the third is to right
Claiming each symmetrical region in region is six fastener spacing；
The test scope arranges 31 measuring points along the railroad track length direction altogether from left to right, wherein institute
The end for stating middle section and the symmetrical region is not repeatedly disposed with the measuring point, in the middle section
Seven measuring points, first pair of symmetrical region and the third have also been evenly arranged to each symmetrical area in symmetrical region
It is also evenly arranged in domain there are three the measuring point, has also been evenly arranged in each symmetrical region in second pair of symmetrical region
Two measuring points.
5. the method for identification railway track structure modal characteristics according to claim 3, which is characterized in that described 31
In a measuring point, first measuring point, the 4th measuring point, the 6th measuring point, the 8th measuring point, the 11st measuring point, from left to right
14 measuring points, the 16th measuring point, the 20th measuring point, the 23rd measuring point, the 27th measuring point, the 30th survey
Point is the excitation point.
6. the method for identification railway track structure modal characteristics according to claim 3, which is characterized in that in the center
The mode of the measuring point and excitation point is arranged in region, for testing the vertical pinned-pinned mould of the railroad track
State and transverse direction pinned-pinned mode；Testing the vertical pinned-pinned mode and transverse direction pinned-pinned
When mode, elongated area that first pair of symmetrical region is tested as pinned-pinned.
7. the method for identification railway track structure modal characteristics according to claim 3, which is characterized in that in the center
Region and first pair of symmetrical region arrange the mode of the measuring point and excitation point, for testing the railroad track
Vertical lower mode；When testing the vertical lower mode, described second prolongs symmetrical region as vertical lower mode
Stretch region.
8. the method for identification railway track structure modal characteristics according to claim 3, which is characterized in that in the center
Region, first pair of symmetrical region and second pair of symmetrical region arrange the mode of the measuring point and excitation point, use
In the lateral lower mode for testing the railroad track；When testing the lateral lower mode, the third is to symmetrical region
Elongated area as lateral lower mode.
9. the method for identification railway track structure modal characteristics according to claim 1, which is characterized in that test the iron
When the vertical mode in rail road, the sensor arrangement the railroad track rail top of steel rail, test frequency range be 0 to
1500Hz。
10. the method for identification railway track structure modal characteristics according to claim 1, which is characterized in that described in test
When the lateral lower mode of railroad track, rail head of rail of the sensor arrangement in the railroad track, test frequency range
For 0-700Hz.
11. the method for identification railway track structure modal characteristics according to claim 2, which is characterized in that in described
It entreats and is respectively arranged multiple measuring points along the railroad track length direction on the rail head, the web of the rail and rail bottom in region, for testing
The lateral high order mode of the railroad track, test frequency range are 400-1500Hz.
12. the method for identification railway track structure modal characteristics according to claim 11, which is characterized in that the center
Region is two fastener spacing, is evenly arranged respectively between the rail head of the middle section, the both ends and both ends of the web of the rail
Nine measuring points；The measuring point is not arranged in each fastener node location of the rail bottom of the middle section, described
Three measuring points are evenly arranged in each fastener spacing of the rail bottom of middle section, in the rail of the middle section
Six measuring points are arranged at bottom altogether.
13. the method for identification railway track structure modal characteristics according to claim 12, which is characterized in that the center
Region the rail head arrangement nine measuring points in, from left to right first measuring point, third measuring point, the 5th measuring point,
6th measuring point, the 9th measuring point are the excitation point；In nine measuring points of the web of the rail arrangement of the middle section,
Second measuring point, the 7th measuring point are the excitation point from left to right；Described the six of the rail bottom arrangement of the middle section
In a measuring point, first measuring point, second measuring point are the excitation point from left to right.
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| CN115210549A (en) * | 2021-09-18 | 2022-10-18 | 沈阳铁路信号有限责任公司 | Method and system for identifying high-order transverse mode of steel rail to measure longitudinal force |
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