CN113218640B - Vibration damping effect test method for vibration damping track - Google Patents
Vibration damping effect test method for vibration damping track Download PDFInfo
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- CN113218640B CN113218640B CN202110363547.8A CN202110363547A CN113218640B CN 113218640 B CN113218640 B CN 113218640B CN 202110363547 A CN202110363547 A CN 202110363547A CN 113218640 B CN113218640 B CN 113218640B
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- 238000013016 damping Methods 0.000 title claims abstract description 89
- 230000000694 effects Effects 0.000 title claims abstract description 29
- 238000010998 test method Methods 0.000 title claims description 4
- 230000004044 response Effects 0.000 claims abstract description 58
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 32
- 239000010959 steel Substances 0.000 claims abstract description 32
- 230000001133 acceleration Effects 0.000 claims abstract description 31
- 230000009467 reduction Effects 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 21
- 238000012360 testing method Methods 0.000 claims abstract description 19
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 238000005299 abrasion Methods 0.000 claims abstract description 11
- 238000004458 analytical method Methods 0.000 claims abstract description 6
- 238000010276 construction Methods 0.000 claims description 9
- 241001669679 Eleotris Species 0.000 claims description 4
- 238000007689 inspection Methods 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 3
- 238000000691 measurement method Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims 1
- 230000010354 integration Effects 0.000 claims 1
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- 238000011056 performance test Methods 0.000 abstract description 4
- 238000012351 Integrated analysis Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
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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
- G01M13/00—Testing of machine parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
Abstract
The invention discloses a method for testing the vibration damping effect of a vibration damping track, which is applied to a test system, wherein the system comprises a track detection vehicle, the vibration damping track, a collecting device, a vibration sensor and a common track for comparison, and comprises the following steps: the rail detection vehicle passes through the vibration reduction rail and the common rail for multiple times according to preset speed, the rail quality coefficient TQI, the axle box vertical vibration response, the steel rail wave abrasion and the tunnel structure vibration response of the vibration reduction rail and the common rail are respectively obtained, finally, the vibration reduction effect of the vibration reduction rail is obtained through comprehensive analysis, the vibration acceleration of the steel rail and the track bed is analyzed according to the steel rail vibration response and the rail structure vibration response, and the vibration acceleration level of the steel rail and the track bed is obtained. The invention eliminates the difference caused by factors such as operating trains, operating speed, track quality, steel rail waves and the like by simulating the same excitation condition and operating condition, thereby accurately obtaining the vibration damping effect of the vibration damping track under different external environments and improving the accuracy of the vibration damping performance test of the vibration damping track.
Description
Technical Field
The invention relates to the field of vibration damping rails, in particular to a vibration damping effect testing method of a vibration damping rail.
Background
The rapid development of urban rail transit relieves traffic pressure and causes more and more serious environmental vibration, so that the life, rest and sleep of residents along the line are influenced, and the normal work of hospitals and scientific research institutions equipped with precise instruments can be interfered.
Aiming at the problem of the influence of urban rail transit on the vibration of a proximity sensitive building, vibration source vibration reduction is most widely and effectively applied to the existing rail transit line and is most convenient to implement. Conventional wisdom holds that a design parameter in the form of a track, if determined, will have its damping effect determined. However, recent studies have shown that: the vibration damping effect of the track is not an inherent characteristic of the track, but is related to various factors such as excitation conditions, operation conditions, and the like.
In the existing test of the vibration damping performance of the rail, because a comparison section is influenced by various complex factors such as vehicle speed, curve radius, tunnel type, rigidity of the lower part of the rail and the like, the evaluation quantity of the vibration damping effect obtained by the actual online test is not insertion loss in a strict sense, but is generally called 'quasi insertion loss' or 'comparison loss'
Disclosure of Invention
The invention mainly aims to provide a method for testing the vibration damping effect of a vibration damping track, and aims to improve the precision of the vibration damping performance test of the vibration damping track.
The invention provides a method for testing the vibration damping effect of a vibration damping track, which is applied to a test system, wherein the system comprises a track detection vehicle, the vibration damping track, a collecting device, a vibration sensor and a common track for comparison, and the method comprises the following steps:
the rail detection vehicle passes through the vibration reduction rail and the common rail for multiple times according to preset speed, the rail quality coefficient TQI, the axle box vertical vibration response, the steel rail wave abrasion and the tunnel structure vibration response of the vibration reduction rail and the common rail are respectively obtained, finally, the vibration reduction effect of the vibration reduction rail is obtained through comprehensive analysis, the vibration acceleration of the steel rail and the track bed is analyzed according to the steel rail vibration response and the rail structure vibration response, and the vibration acceleration level of the steel rail and the track bed is obtained.
Preferably, the track inspection vehicle passes through damping track and ordinary track according to preset speed many times, acquires damping track and ordinary track's track quality coefficient TQI, the vertical vibration response of axle box, rail wave wearing and tearing, tunnel structure vibration response respectively, and final integrated analysis obtains the orbital damping effect of damping, and according to rail vibration response, the vibration acceleration of track structure vibration response analysis rail and railway roadbed, the step of the vibration acceleration grade of rail and railway roadbed obtains includes:
taking a track detection vehicle as a mobile vibration source, and repeatedly passing through a vibration reduction track and a common track at a preset speed;
respectively installing vibration sensors on the test end faces of the vibration reduction track and the common track;
connecting the vibration sensor with the acquisition device in a communication manner;
collecting and storing a vibration signal, wherein the vibration signal is originated from a vibration sensor;
comprehensively analyzing the track quality coefficient TQI, the axle box vertical vibration response, the steel rail wave abrasion, the steel rail vibration response a2, the track structure vibration response a3 and the tunnel structure vibration response of the vibration-damping track and the common track by adopting a weighted average algorithm, respectively generating vibration-damping track section data S1 and common track section data S2, and obtaining the vibration-damping effect of the vibration-damping track according to the difference value of the common section data S2 and the vibration-damping track section data S1.
Preferably, the weighted average algorithm comprises:
S＝0.06TQI+0.05a1+0.04ε+0.85a4
wherein, TQI is track mass coefficient, and a1 is the vertical vibration response of axle box, and epsilon is rail wave wearing and tearing, tunnel structure vibration response a 4.
Preferably, the track detection vehicle is provided with a track dynamic geometric parameter detection device, has an accurate positioning function and runs on a positive line;
collecting and recording the dynamic geometrical state parameters of the track with the wavelength range of 1.5m to 42m, the track direction, the track gauge change rate, the level and the axle box vertical acceleration;
and evaluating the track state quality coefficient by adopting the local amplitude and the section quality average value to obtain a value of a track quality coefficient TQI.
Preferably, the step of evaluating the track state quality coefficient by using the local amplitude and the section quality average value to obtain a value of a track quality coefficient TQI includes:
and taking the track section of 200m as a unit section, and respectively calculating the standard deviation of the geometric irregularity amplitude of the tracks of the horizontal, left high and low, right high and low, left track direction, right track direction, triangular pits and track gauge 7 items on the unit section.
Preferably, the vibration damping rail comprises one or two or more vibration damping combination of vibration damping fasteners, elastic sleepers and vibration damping track beds.
Preferably, the tunnel structure corresponding to the tunnel structure vibration response comprises a mine method construction tunnel, a shield method construction tunnel and an open cut method construction tunnel.
Preferably, the vibration acceleration is measured by using an urban area environment vibration measurement method and has the unit of m/s 2 And the vibration acceleration comprises axle box vertical vibration response, rail vibration response a2, rail structure vibration response a3 and tunnel structure vibration response.
The invention has the beneficial effects that: according to the invention, by simulating the same excitation condition and operation condition, the difference caused by factors such as operation trains, operation speed, track quality, steel rail waves and the like is eliminated, so that the vibration damping effect of the vibration damping track under different external environments is accurately obtained, and the accuracy of the vibration damping performance test of the vibration damping track is greatly improved.
Drawings
Fig. 1 is a schematic flow chart of a vibration damping effect testing method for a vibration damping track according to a first embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, the present invention provides a method for testing vibration damping effect of a vibration damping track, which is applied to a test system, wherein the system comprises a track detection vehicle, a vibration damping track, a collection device, a vibration sensor and a common track for comparison, and the method comprises the following steps:
s1: the rail detection vehicle passes through the vibration reduction rail and the common rail for multiple times according to preset speed, the rail quality coefficient TQI, the axle box vertical vibration response, the steel rail wave abrasion and the tunnel structure vibration response of the vibration reduction rail and the common rail are respectively obtained, finally, the vibration reduction effect of the vibration reduction rail is obtained through comprehensive analysis, the vibration acceleration of the steel rail and the track bed is analyzed according to the steel rail vibration response and the rail structure vibration response, and the vibration acceleration level of the steel rail and the track bed is obtained.
In the embodiment of the invention, in order to reasonably evaluate the vibration damping effect of the vibration damping track, the track quality coefficient TQI, the steel rail wave abrasion and the vibration source vibration vertical acceleration of the vibration damping track and the common track are simultaneously sampled, wherein the vibration source vibration vertical acceleration comprises the steel rail lead vertical vibration acceleration, the track structure vertical vibration acceleration and the tunnel wall vertical vibration acceleration. Because the vertical vibration acceleration signal of the rail inspection axle box is a non-steady and non-linear signal, the acceleration signal needs to be filtered, and the processed axle box vibration acceleration signal is secondarily integrated to obtain the wave abrasion waveform of the steel rail based on the principle of an inertia reference method. Analyzing the vibration acceleration of the steel rail and the track bed according to the vibration response of the steel rail and the vibration response of the track structure to obtain the vibration acceleration level of the steel rail and the track bed,
according to the invention, by simulating the same excitation condition and operation condition, the difference caused by factors such as operation trains, operation speed, track quality, steel rail waves and the like is eliminated, so that the vibration damping effect of the vibration damping track under different external environments is accurately obtained, and the accuracy of the vibration damping performance test of the vibration damping track is greatly improved.
Specifically, the track inspection vehicle passes through damping track and ordinary track according to predetermineeing speed many times, acquires damping track and ordinary orbital track quality coefficient TQI respectively, the vertical vibration response of axle box, rail wave wearing and tearing, tunnel structure vibration response, and final integrated analysis obtains the orbital damping effect of damping, and according to rail vibration response, the vibration acceleration of track structure vibration response analysis rail and railway roadbed, obtains the step S1 of the vibration acceleration grade of rail and railway roadbed, include:
s11: taking a track detection vehicle as a mobile vibration source, and repeatedly passing through a vibration reduction track and a common track at a preset speed;
s12: the vibration sensors are respectively arranged on the test end surfaces of the vibration reduction track and the common track;
s13: connecting the vibration sensor with the acquisition device in a communication manner;
s14: collecting and storing a vibration signal, wherein the vibration signal is originated from a vibration sensor;
s15: comprehensively analyzing the track quality coefficient TQI, the axle box vertical vibration response, the steel rail wave abrasion, the steel rail vibration response a2, the track structure vibration response a3 and the tunnel structure vibration response of the vibration-damping track and the common track by adopting a weighted average algorithm, respectively generating vibration-damping track section data S1 and common track section data S2, and obtaining the vibration-damping effect of the vibration-damping track according to the difference value of the common section data S2 and the vibration-damping track section data S1.
Wherein, the weighted average algorithm comprises:
S＝0.06TQI+0.05a1+0.04ε+0.85a4
wherein, TQI is track mass coefficient, and a1 is the vertical vibration response of axle box, and epsilon is rail wave wearing and tearing, tunnel structure vibration response a 4.
In the embodiment of the invention, the track detection vehicle is provided with a track dynamic geometric parameter detection device, has a precise positioning function and runs on a positive line; collecting and recording the dynamic geometrical state parameters of the track with the wavelength range of 1.5m to 42m, the track direction, the track gauge change rate, the level and the axle box vertical acceleration; and evaluating the track state quality coefficient by adopting the local amplitude and the section quality average value to obtain the value of the track quality coefficient TQI.
The method comprises the following steps of evaluating a track state quality coefficient by adopting a local amplitude and a section quality average value to obtain a track quality coefficient TQI value, wherein the steps comprise:
and taking the track section of 200m as a unit section, and respectively calculating the standard deviation of the geometric irregularity amplitude of the tracks of the horizontal, left high and low, right high and low, left track direction, right track direction, triangular pits and track gauge 7 items on the unit section.
In the embodiment of the invention, the damping track comprises one or two or more damping combinations of damping fasteners, elastic sleepers and damping track beds. Specifically, the vibration damping track comprises one of a vibration damping fastener, an elastic sleeper and a vibration damping track bed; or any two of a damping fastener, an elastic sleeper and a damping track bed; or three of damping fastener, elastic sleeper and damping track bed.
In the embodiment of the invention, the tunnel structure corresponding to the tunnel structure vibration response comprises a mine method construction tunnel, a shield method construction tunnel and an open cut method construction tunnel.
In the embodiment of the invention, the vibration acceleration is measured by using an urban area environment vibration measurement method and has the unit of m/s 2 And the vibration acceleration comprises axle box vertical vibration response, rail vibration response a2, rail structure vibration response a3 and tunnel structure vibration response.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (4)
1. The vibration damping effect test method of the vibration damping track is characterized by being applied to a test system, wherein the test system comprises a track detection vehicle, the vibration damping track, a collecting device, a vibration sensor and a common track for comparison, and the vibration damping effect test method of the vibration damping track comprises the following steps:
the track detection vehicle passes through the vibration reduction track and the common track for multiple times according to preset speed, the track quality coefficients, the axle box vertical vibration response, the steel rail wave abrasion and the tunnel structure vibration response of the vibration reduction track and the common track are respectively obtained, finally, the vibration reduction effect of the vibration reduction track is obtained through comprehensive analysis, the vibration acceleration of the steel rail and the track bed is analyzed according to the steel rail vibration response and the track structure vibration response, and the vibration acceleration grade of the steel rail and the track bed is obtained; specifically, the track inspection vehicle is used as a mobile vibration source, passes through the vibration reduction track and the common track for multiple times according to a preset speed, the vibration sensors are respectively installed on the test end surfaces of the vibration reduction track and the common track, the vibration sensors are in communication connection with the acquisition device, and vibration signals are acquired and stored, wherein the vibration signals originate from the vibration sensors, the track quality coefficients, axle box vertical vibration response, steel rail wave abrasion and tunnel structure vibration response of the vibration reduction track and the common track are comprehensively analyzed by adopting a weighted average algorithm, vibration reduction track section data S1 and common track section data S2 are respectively generated, and the vibration reduction effect of the vibration reduction track is obtained according to the difference value between the common track section data S2 and the vibration reduction track section data S1; the weighted average algorithm comprises:
S＝0.06TQI+0.05a1+0.04ε+0.85a4
the method comprises the following steps of A, obtaining TQI, A1, Epsilon, a4, a vibration response of a tunnel structure, wherein the TQI is a track mass coefficient, the A1 is a vertical vibration response of an axle box, the Epsilon is steel rail wave abrasion;
measuring the vibration acceleration in m/s by using the urban area environment vibration measurement method 2 Wherein the vibrational acceleration comprises the axle box vertical vibrational response, the rail structure vibrational response, and the tunnel structure vibrational response;
filtering the vertical vibration response of the axle box, and performing secondary integration on the processed vertical vibration response of the axle box to obtain the wave abrasion of the steel rail;
the track detection vehicle is provided with a track dynamic geometric parameter detection device, has an accurate positioning function, runs on a positive line, collects and records track dynamic geometric state parameters of 1.5 m-42 m wavelength range height, track direction, track gauge change rate, level and axle box vertical acceleration, and evaluates a track quality coefficient by adopting a local amplitude and a zone quality average value to obtain a value of the track quality coefficient.
2. The method for testing the vibration damping effect of the vibration damping track according to claim 1, wherein the step of evaluating the track quality coefficient by using the local amplitude and the section mass average value to obtain the value of the track quality coefficient comprises:
and taking the track section of 200m as a unit section, and respectively calculating the standard deviation of the geometric irregularity amplitude of the tracks of the horizontal, left high and low, right high and low, left track direction, right track direction, triangular pits and track gauge 7 items on the unit section.
3. The method for testing the vibration damping effect of the vibration damping track according to claim 2, wherein the vibration damping track comprises one or more vibration damping combinations of a vibration damping fastener, an elastic sleeper and a vibration damping track bed.
4. The method for testing the vibration damping effect of the vibration damping track according to claim 1, wherein the tunnel structure corresponding to the tunnel structure vibration response comprises a mine method construction tunnel, a shield method construction tunnel and an open cut method construction tunnel.
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| CN114216704A (en) * | 2021-11-17 | 2022-03-22 | 浙江天铁实业股份有限公司 | Track vibration damping pad parameter detection method |
| CN114275003B (en) * | 2021-12-28 | 2023-10-13 | 新疆额尔齐斯河流域开发工程建设管理局 | Method for detecting and evaluating irregularity of temporary transportation track of super-long TBM tunnel under construction |
| CN115130066B (en) * | 2022-08-30 | 2022-11-11 | 中国铁路设计集团有限公司 | Online evaluation method for vibration reduction effect of subway vibration reduction track |
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