CN110530657B - Wheel track horizontal force measuring method and measuring system - Google Patents
Wheel track horizontal force measuring method and measuring system Download PDFInfo
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- CN110530657B CN110530657B CN201910910813.7A CN201910910813A CN110530657B CN 110530657 B CN110530657 B CN 110530657B CN 201910910813 A CN201910910813 A CN 201910910813A CN 110530657 B CN110530657 B CN 110530657B
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000005259 measurement Methods 0.000 claims abstract description 95
- 238000010008 shearing Methods 0.000 claims abstract description 22
- 241001669679 Eleotris Species 0.000 claims description 28
- 229910000831 Steel Inorganic materials 0.000 claims description 17
- 239000010959 steel Substances 0.000 claims description 17
- 238000000691 measurement method Methods 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 1
- BXLNWOAYQXBHCY-UHFFFAOYSA-N diphenylsilylidene(diphenyl)silane Chemical compound C1=CC=CC=C1[Si](C=1C=CC=CC=1)=[Si](C=1C=CC=CC=1)C1=CC=CC=C1 BXLNWOAYQXBHCY-UHFFFAOYSA-N 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0028—Force sensors associated with force applying means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/08—Railway vehicles
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The embodiment of the invention discloses a wheel track horizontal force measuring method and a measuring system. The measuring method comprises the following steps: the collecting unit measures the wheel set acting force of each horizontal force measuring point and the wheel set acting force of each shearing force measuring point in the interval; and calculating the wheel track horizontal force acting on the unit measurement interval according to the wheel set acting force of each horizontal force measurement point and the wheel set acting force of each shearing force measurement point. In the embodiment of the invention, the continuous wheel track horizontal force is obtained by adding constraint conditions, dividing the unit areas and combining the horizontal forces of the unit areas, so that the continuous wheel track horizontal force test is realized, and the test precision of the wheel track horizontal force is improved.
Description
Technical Field
The invention relates to the field of rail transit, in particular to a wheel track horizontal force measuring method and a measuring system.
Background
With the continuous increase of the operation speed, the operation safety of the railway vehicle is increasingly emphasized. In the ground safety assessment of rail vehicles, the most straightforward and reliable method is rail vehicle wheel rail force measurement, in particular wheel rail force continuous measurement.
Because the rail strain at the fulcrum position of the sleeper is influenced by the constraint state of the sleeper fastener, the wheel rail horizontal force at the fulcrum position of the sleeper is difficult to stably measure.
In order to evaluate the state of the vehicle, a widely used vehicle running quality ground monitoring system (TPDS) in China adopts a force measuring backing plate method, and continuous horizontal force of a wheel set in a test area is comprehensively calculated according to the measured level of the supporting point and a comprehensive stress influence line by arranging a backing plate sensor at the supporting point position of a sleeper. However, the method has the problems of reduced measuring accuracy of horizontal force of wheel pairs, mutual influence among wheel pairs and the like because of the limited arrangement length of the force measuring backing plate in the aspects of economy and the like.
Disclosure of Invention
The embodiment of the invention provides a wheel rail horizontal force measuring method and a measuring system, which are used for realizing long-distance full-continuous measurement of the wheel rail horizontal force on the ground and improving the measuring precision of the wheel rail horizontal force.
The embodiment of the invention provides a wheel rail horizontal force measuring method, wherein a wheel rail comprises a steel rail and a plurality of sleepers, a horizontal force measuring point is arranged at each sleeper fulcrum position, a shear force measuring point is arranged at a rail midspan position, the sleeper fulcrum position is the intersection point position of the sleeper and the steel rail, the rail midspan position is positioned at the edge of the upper surface of the steel rail, a measuring interval between two adjacent shear force measuring points is a unit measuring interval, and the distance between two adjacent shear force measuring points is smaller than the minimum wheelbase of a monitored vehicle;
The measuring method comprises the following steps:
The collecting unit measures the wheel set acting force of each horizontal force measuring point and the wheel set acting force of each shearing force measuring point in the interval;
And calculating the wheel track horizontal force acting on the unit measurement interval according to the wheel set acting force of each horizontal force measurement point and the wheel set acting force of each shearing force measurement point.
Based on the same inventive concept, the embodiment of the invention also provides a wheel track horizontal force measuring system, which comprises: the shear force measuring unit is positioned at the middle position of the steel rail provided with the shear force measuring point and is used for collecting the wheel set acting force of the shear force measuring point;
The horizontal force measuring unit is positioned at the sleeper fulcrum position provided with a horizontal force measuring point, wherein the sleeper fulcrum position is the intersection point position of the sleeper and the steel rail and is used for collecting the wheel set acting force of the horizontal force measuring point; and
The central control unit is connected with the shear force measuring unit and the horizontal force measuring unit in a wired or wireless mode respectively and is used for acquiring the wheel set acting force of each horizontal force measuring point and the wheel set acting force of each shear force measuring point in the unit measuring interval, and calculating the wheel track horizontal force acting on the unit measuring interval according to the wheel set acting force of each horizontal force measuring point and the wheel set acting force of each shear force measuring point. Wherein, two adjacent shear force measuring units and the middle horizontal force measuring unit form a unit measuring interval.
In the embodiment of the invention, the horizontal force measuring points are arranged at the supporting point positions of each sleeper, the shear force measuring points are arranged at the rail span positions, the wheel set acting force of each horizontal force measuring point and the wheel set acting force of each shear force measuring point in the unit measuring interval are collected, and continuous wheel rail horizontal force is obtained by adding constraint conditions, dividing the unit measuring intervals and combining the wheel set acting forces of each unit measuring interval, so that the continuous wheel rail horizontal force test is realized, and the test precision of the wheel rail horizontal force is improved.
Drawings
FIG. 1 is a flow chart of a method for measuring horizontal force of a wheel track according to a first embodiment of the invention;
FIG. 2 is a schematic diagram of a wheel track horizontal force unit measurement interval according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a single wheel set wheel rail horizontal force measurement interval according to a first embodiment of the present invention;
FIG. 4 is a schematic flow chart of a method for measuring horizontal force of a wheel track according to a second embodiment of the present invention;
FIG. 5 is a schematic illustration of a method for measuring horizontal force of a wheel track according to a second embodiment of the present invention;
fig. 6 is a schematic structural diagram of a continuous track horizontal force measurement system according to a third embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Example 1
Fig. 1 is a schematic flow chart of a wheel track horizontal force measurement method according to an embodiment of the present invention, and as shown in fig. 1, the wheel track horizontal force measurement method includes:
s110, collecting wheel set acting force of each horizontal force measuring point and wheel set acting force of each shearing force measuring point in the unit measuring interval;
The wheel set acting force of the horizontal force measuring point is the force of the wheel set acting on the horizontal force measuring point when the wheel set passes through the horizontal force measuring point on the measuring section, and the wheel set acting force of the shearing force measuring point is the force of the wheel set acting on the shearing force measuring point when the wheel set passes through the shearing force measuring point on the measuring section.
S120, calculating the horizontal force of the wheel track acting on the unit measurement section according to the wheel set acting force of each horizontal force measurement point and the wheel set acting force of each shearing force measurement point.
The horizontal force of the wheel track can be calculated according to the force balance principle by the wheel set acting force of the horizontal force measuring point and the wheel set acting force of the shearing force measuring point.
As shown in fig. 2, the schematic diagram of a wheel track horizontal force unit measurement interval provided by the embodiment of the invention is shown in fig. 2, the wheel track comprises a steel rail 10 and a plurality of sleepers 20, a horizontal force measurement point 30 is arranged at a fulcrum position of each sleeper 20, a shear force measurement point 40 is arranged at a rail crossing position, the sleeper fulcrum position is an intersection point position of the sleeper 20 and the steel rail 10, the rail crossing position is positioned at the edge of the upper surface of the steel rail, and a measurement interval between two adjacent shear force measurement points 40 is a unit measurement interval 50.
When one or more wheelsets roll in one unit measuring section 50, the horizontal force of the wheelset acting on the rail 10 is Q i, the wheelset acting force of the horizontal force measuring point 30 of the wheelset acting on the fulcrum position of each sleeper 20 is H j, the wheelset acting force of the two shear force measuring points 40 acting on the midspan position of the rail 10 in one unit measuring section 50 is Q a、qb, and the wheelset acting force is obtained according to the force balance principle
Wherein N is the number of wheel sets acting in one unit measurement interval, and M is the number of horizontal force measurement points in one unit measurement interval.
Fig. 3 is a schematic diagram of a measuring interval principle of a horizontal force unit of a wheel track of a single wheel pair, as shown in fig. 3, and a distance d between two adjacent shear force measuring points 40 is smaller than a minimum wheelbase x of a monitored vehicle.
The distance d between two adjacent shear force measuring points 40 is smaller than the minimum wheelbase x of the monitored vehicle, i.e. the constraint is that
d＜min(x)
By setting the constraint that the spacing d between two adjacent shear measurement points 40 is less than the minimum wheelbase x of the monitored vehicle, it is ensured that there is only one wheel set applied force in the unit measurement zone 50. When a wheel set rolls in a unit measuring section 50, the wheel set has a wheel set horizontal force Q i on the rail 10, the wheel set acting force H 1、H2 on the horizontal force measuring point 30 at the fulcrum position of each sleeper 20, the wheel set acting force Q a、qb on the two shear force measuring points 40 at the midspan position of the rail 10 in the unit measuring section 50, and the wheel set is obtained according to the force balance principle
Qi＝H1+H2+qa+qb
By setting the constraint that the distance between two adjacent shear force measurement points 40 is smaller than the minimum wheelbase of the monitored vehicle, the influence of the front 1 wheel pair and the rear 1 wheel pair of the current wheel pair in the unit measurement interval on the current unit measurement is avoided, the problems of unclear horizontal force measurement boundary and mutual influence are solved, and the test precision is improved.
The working principle of the wheel track horizontal force measuring method is as follows: the wheel rail is divided into a plurality of continuous unit measuring intervals, a horizontal force measuring point and a shearing force measuring point are arranged on the unit measuring intervals, wherein the horizontal force measuring point is positioned at the intersection point of each sleeper and the steel rail, and the shearing force measuring point is positioned at the rail midspan position at the edge of the upper surface of the steel rail. The wheel track horizontal force of the section is measured by the calculation unit through the wheel set acting force of each horizontal force measuring point and the wheel set acting force of each shearing force measuring point of the section measured by the acquisition unit.
According to the technical scheme, the horizontal force measuring points are arranged at the pivot positions of the sleepers, the shear force measuring points are arranged at the rail span positions, the wheel set acting force of each horizontal force measuring point and the wheel set acting force of each shear force measuring point in the unit measuring interval are collected, the wheel set acting force of the wheel set acting on the unit measuring interval is calculated through adding constraint conditions, the wheel rail horizontal force measuring in the unit measuring interval is realized, and the testing precision of the wheel rail horizontal force is improved.
Based on the above technical solution, the number of sleepers 20 in the unit measuring zone 50 is 1 or more. The unit measurement interval 50 is between two adjacent shear measurement points 40, and the distance d between two adjacent shear measurement points 40 needs to be smaller than the minimum wheelbase x of the monitored vehicle, and the positions of the two shear measurement points 40 are determined by the constraint that the distance d between two adjacent shear measurement points 40 needs to be smaller than the minimum wheelbase x of the monitored vehicle, so that the number of sleepers 20 between the two shear measurement points 40 is related to the divided unit interval.
Based on the above technical solution, the end points of two adjacent unit measurement intervals 50 may share the shear measurement point 40. The advantage of the arrangement of the end points of the adjacent two unit measurement intervals 50 sharing the shear force measurement points 40 is that the wheel rail horizontal forces of the different unit measurement intervals 50 are respectively measured in the adjacent two unit measurement intervals 50, and the wheel rail horizontal forces of the respective unit measurement intervals 50 are combined to obtain the wheel rail horizontal force of the continuous measurement interval, so that the arrangement of the shear force measurement points is reduced, and the wheel rail horizontal force of the continuous measurement interval can be obtained.
Example two
Fig. 4 is a schematic flow chart of another method for measuring horizontal force of a wheel track according to the second embodiment of the present invention, where the method shown in fig. 4 is an expansion based on the method of embodiment 1, so as to illustrate that the method of fig. 1 may also be applied to continuous long distance measurement of horizontal force of a wheel track, and as shown in fig. 4, the method for measuring horizontal force of a wheel track includes:
s110, collecting wheel set acting force of each horizontal force measuring point and wheel set acting force of each shearing force measuring point in the unit measuring interval;
s120, calculating the horizontal force of the wheel track acting on the unit measurement section according to the wheel set acting force of each horizontal force measurement point and the wheel set acting force of each shearing force measurement point.
S130, calculating the wheel track horizontal force acting on each unit measurement interval in the continuous measurement interval, and combining to obtain the wheel track horizontal force of the continuous measurement interval.
And combining the wheel rail horizontal forces in the continuous measurement intervals according to the calculated wheel rail horizontal forces in the unit measurement intervals.
As shown in fig. 5, an exemplary wheel-rail horizontal force measuring method according to a second embodiment of the present invention is shown in fig. 5, in which two consecutive unit measuring sections S1 and S2, the wheel-rail horizontal force acting on the unit measuring section S1 is Q 1, the wheel-set acting on the horizontal force measuring point 30 at the fulcrum position of each sleeper 20 of the unit measuring section S1 is H 1 and H 2, respectively, and the wheel-set acting on the two shear force measuring points 40 at the midspan position of the rail 10 of the unit measuring section S1 is Q a and Q b. The wheel set horizontal force acting on the wheel rail of the unit measurement section S2 is Q 2, the wheel set acting on the horizontal force measurement point 30 at the fulcrum position of each sleeper 20 of the unit measurement section S2 is H 3 and H 4, respectively, the wheel set acting on the two shear force measurement points 40 at the mid-span position of the rail 10 of the unit measurement section S2 is Q b and Q c, that is, the unit measurement section S1 and the unit measurement section S2 share the shear force measurement point b point, and the wheel set acting on the unit measurement section S1 and the unit measurement section S2 measurement point b point are Q b.
The unit measures the track level force Q 1 for interval S1:
Q1＝qa+qb+H1+H2
The unit measures the track level force Q 2 for interval S2:
Q2＝qb+qc+H3+H4
The wheel-rail horizontal force at any moment of the constituted continuous measurement section of the two unit measurement sections can be obtained.
According to the technical scheme, the wheel track horizontal force in the continuous measurement interval is obtained through the wheel track horizontal force measured in the measurement interval of the combined unit, long-distance full continuous measurement of the wheel track horizontal force is realized, an effective means is provided for dynamic performance test and research of rail vehicles, particularly high-speed passenger trains, and safety evaluation and detection, and the method has a good application prospect.
Example 3
Fig. 6 is a schematic structural diagram of a continuous measuring system for horizontal force of wheel track according to a third embodiment of the present invention, as shown in fig. 6, the measuring system includes a shear force measuring unit 1, located at a midspan position of a steel rail where a shear force measuring point is located, for collecting wheel set acting force of the shear force measuring point;
The horizontal force measuring unit 2 is positioned at a sleeper fulcrum position provided with a horizontal force measuring point, wherein the sleeper fulcrum position is the intersection point position of the sleeper and the steel rail and is used for collecting wheel set acting force of the horizontal force measuring point; and
The central control unit 3 is connected with the shear force measuring unit and the horizontal force measuring unit in a wired or wireless mode respectively, and is used for acquiring the wheel set acting force of each horizontal force measuring point and the wheel set acting force of each shear force measuring point in the unit measuring interval, and calculating the wheel track horizontal force acting on the unit measuring interval according to the wheel set acting force of each horizontal force measuring point and the wheel set acting force of each shear force measuring point. Wherein, two adjacent shear force measuring units and the middle horizontal force measuring unit form a unit measuring interval.
Alternatively, the shear force measuring unit 1 and the horizontal force measuring unit 2 may be sensor modules for measuring the wheel set forces of the wheel sets passing through the shear force measuring unit 1 and the horizontal force measuring unit 2.
The working principle of the wheel track horizontal force measuring system is as follows: the shear force measuring unit is connected with the central control unit in a wired or wireless mode and is used for collecting wheel set acting force of the shear force measuring points and transmitting the wheel set acting force to the central control unit, the horizontal force measuring points collect wheel set acting force of the horizontal force measuring points and are connected with the central control unit in a wired or wireless mode, and the central control unit calculates wheel track horizontal force of a section through the wheel set acting force of the obtained shear force measuring points and the wheel set acting force of the horizontal force measuring points.
According to the technical scheme, the central control unit is connected with the shear force measuring unit and the horizontal force measuring unit in a wired or wireless mode to obtain wheel set acting force of the horizontal force measuring points and wheel set acting force of each shear force measuring point, and calculates wheel set acting force of the obtained horizontal force measuring points and wheel set acting force of the shear force measuring points to achieve real-time monitoring of wheel track horizontal force and assessment of railway vehicle performance.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (8)
1. The wheel rail horizontal force measuring method is characterized in that the wheel rail comprises a steel rail and a plurality of sleepers, a horizontal force measuring point is arranged at each sleeper fulcrum position, a shearing force measuring point is arranged at a rail midspan position, the sleeper fulcrum position is the intersection point position of the sleeper and the steel rail, the rail midspan position is positioned at the edge of the upper surface of the steel rail, a measuring interval between two adjacent shearing force measuring points is a unit measuring interval, and the distance between two adjacent shearing force measuring points is smaller than the minimum wheelbase of a monitored vehicle;
The measuring method comprises the following steps:
Collecting wheel set acting force of each horizontal force measuring point and wheel set acting force of each shear force measuring point in the unit measuring interval;
And calculating the horizontal force of the wheel track acting on the unit measurement section according to the wheel set acting force of each horizontal force measurement point and the wheel set acting force of each shearing force measurement point.
2. The wheel rail horizontal force measurement method of claim 1, further comprising a continuous measurement interval including a plurality of adjacent ones of the cell measurement intervals;
The measuring method further comprises the following steps: calculating the wheel track horizontal force acting on each unit measurement zone in the continuous measurement zone, and combining to obtain the wheel track horizontal force of the continuous measurement zone.
3. The wheel rail horizontal force measurement method according to claim 1, wherein the number of sleepers in the unit measurement zone may be 1 or more.
4. The wheel-rail horizontal force measurement method according to claim 1, wherein end points of adjacent two of the unit measurement sections share the shear force measurement point.
5. The wheel rail horizontal force measurement method according to claim 1, wherein the shear force measurement points are located inside and outside edges of the rail upper surface, respectively.
6. A wheel track horizontal force measurement system, comprising:
the shearing force measuring unit is positioned at the middle-crossing position of the steel rail provided with the shearing force measuring point and is used for collecting the wheel set acting force of the shearing force measuring point;
The horizontal force measuring unit is positioned at a sleeper fulcrum position provided with a horizontal force measuring point, wherein the sleeper fulcrum position is the intersection point position of the sleeper and the steel rail and is used for collecting wheel set acting force of the horizontal force measuring point; and
The central control unit is connected with the shear force measuring unit and the horizontal force measuring unit in a wired or wireless mode respectively and is used for acquiring wheel set acting force of each horizontal force measuring point and wheel set acting force of each shear force measuring point in a unit measuring interval, and calculating wheel track horizontal force acting on the unit measuring interval according to the wheel set acting force of each horizontal force measuring point and the wheel set acting force of each shear force measuring point; the shear force measuring units and the horizontal force measuring units in the middle of the shear force measuring units form a unit measuring interval, and the length of the unit measuring interval is smaller than the minimum wheelbase of the monitoring vehicle;
further comprising a continuous measurement interval comprising a plurality of adjacent ones of said cell measurement intervals;
The measurement system further includes: calculating the wheel track horizontal force acting on each unit measurement zone in the continuous measurement zone, and combining to obtain the wheel track horizontal force of the continuous measurement zone.
7. The track level force measurement system of claim 6, wherein endpoints of adjacent two of the cell measurement intervals share the shear force measurement cell.
8. The wheel rail horizontal force measurement system of claim 6, wherein the shear force measurement units are located inboard and outboard of edges of the rail upper surface, respectively.
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| CN110220627A (en) * | 2019-06-12 | 2019-09-10 | 中国神华能源股份有限公司 | Test device, test macro and the test method of wheel rail force |
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2019
- 2019-09-25 CN CN201910910813.7A patent/CN110530657B/en active Active
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