CN101000269A - Method for measuring rail longitudinal force of jointless track structure - Google Patents
Method for measuring rail longitudinal force of jointless track structure Download PDFInfo
- Publication number
- CN101000269A CN101000269A CN 200610023168 CN200610023168A CN101000269A CN 101000269 A CN101000269 A CN 101000269A CN 200610023168 CN200610023168 CN 200610023168 CN 200610023168 A CN200610023168 A CN 200610023168A CN 101000269 A CN101000269 A CN 101000269A
- Authority
- CN
- China
- Prior art keywords
- rail
- longitudinal force
- vibration
- track structure
- damping
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The invention relates to jointless track structure rail longitudinal force measuring method. It includes the following steps: measuring time course wave form for the jointless track rail vibration response under a certain transient state excitation; measuring its natural frequency or vibration damping factor; referring to corresponding standard relationship curve to find out actual longitudinal force value for the measured point; calculating stability. The invention can process multipoint actual measurement according to the concrete demand, but not effect track structure and train running, process measurement under bearing vertical pull or pressure, not be effected by fastening-down temperature of rail, easy to implement, and convenient for operating.
Description
Technical field
The invention belongs to the traffic technique field, be specifically related to a kind of method of testing of rail longitudinal force of jointless track structure.
Background technology
Jointless track has been eliminated rail joint, makes train operation steady, reduces the damage of track and rolling stock, improves Comfortability of Train, reduces the wheel track vibration and noise, is widely used.Yet, because seamless track steel rail can not freely stretch,, will produce very high longitudinal temperature power in the jointless track when rail temperature changes, excessive TEMPERATURE FORCE will cause rail to expand bent or fracture, thereby cause vehicle derailing, jeopardize traffic safety.Therefore, the jointless track TEMPERATURE FORCE is the problem that people pay close attention to for a long time always.But because the influence of the complicated factors such as heterogeneity that actual welded rail temperature force distributes does not also have a kind of lossless detection method that can effectively determine the gapless track TEMPERATURE FORCE on actual track at present both at home and abroad.
Summary of the invention
The objective of the invention is to propose a kind of method of testing of rail longitudinal force of jointless track structure.
The method of testing of the rail longitudinal force of jointless track structure that the present invention proposes, its concrete steps are as follows:
Optional one section rail is as test section, settle displacement measurement sensor thereon, by this section rail is applied a power, encourage it to produce vibratory response, displacement measurement sensor is gathered the rail vibration response data, measures the natural frequency of vibration of rail, with the rail natural frequency of vibration that obtains and the vibration frequency that pre-establishes-longitudinal force standard relationship curve contrast, in the vibration frequency typical curve, find out corresponding rail longitudinal force, can try to achieve the actual longitudinal force of the rail of testing.
The method of testing of the rail longitudinal force of jointless track structure that the present invention proposes, its concrete steps are as follows:
Optional one section rail is as test section, settle displacement measurement sensor thereon, by this section rail is applied a power, encourage it to produce vibratory response, calculate according to the waveform that displacement measurement sensor is surveyed, obtain the ratio of damping of rail vibration response, will obtain ratio of damping and the ratio of damping that pre-establishes-longitudinal force standard relationship curve contrast, in typical curve, find out corresponding rail longitudinal force, can try to achieve the actual longitudinal force of the rail of testing.
Among the present invention, described test section length is 3～20m.
Ultimate principle of the present invention is: according to theory of structural dynamics, under different axial forces (to press to just) act on, the transverse vibration damping of girder construction will increase with the increasing of its suffered axial load, under different axial forces (to press to just) acted on, the transverse vibration natural frequency of vibration of girder construction will reduce with the increasing of its suffered axial load.The jointless track structure rail can be considered as the endless beam on the continuous DISCRETE ELASTIC SUPPORTS supporting basis, the present invention is by applying a certain power to rail, the excitation seamless track steel rail produces vibratory response, by sensor set on rail, gather the rail vibration response data, calculate its transverse vibration ratio of damping, measure the natural frequency of vibration of rail, with reference to prior given standard relationship curve, obtain pairing longitudinal force in the rail by recording the ratio of damping and the natural frequency of vibration.Two parameters relatively can improve the precision of test result.
Described standard relationship curve, can be in the laboratory or on-the-spot method with demarcation obtain, specifically can be on jointless track, to apply certain longitudinal force, measure the ratio of damping and the natural frequency of vibration of its vibratory response, by changing the size of longitudinal force, can set up the standard relationship curve of ratio of damping, the natural frequency of vibration and rail longitudinal force respectively in the hope of a series of ratio of damping and the natural frequency of vibration.
Among the present invention, the standard relationship curve can be in the laboratory or is on-the-spotly obtained by the method for demarcating.Can choose one section jointless track, rail is carried out destressing, at rail one end augmentor is set, respectively track is applied different load, make and produce desired longitudinal force in the rail, by displacement measurement sensor, measure corresponding ratio of damping and vibratory response frequency, then like this with regard to the corresponding rail longitudinal force-relation curve of vibratory response damping, the relation curve of rail longitudinal force-vibration frequency set up.In actual jointless track, as long as record ratio of damping or the natural frequency of vibration of jointless track rail under a certain state, just can go out the longitudinal force of this moment in this section jointless track rail, can set up corresponding standard relationship curve dissimilar track structures according to the standard relationship curve calculating.
There is corresponding relation in ratio of damping when the present invention responds by longitudinal force in the rail and rail vibration, measures ratio of damping, tries to achieve longitudinal force corresponding in the rail; There is corresponding relation in the natural frequency of vibration during perhaps by longitudinal force in the rail and rail vibration response, measures the natural frequency of vibration, tries to achieve longitudinal force corresponding in the rail.
The present invention unclamps the rail fastening of test section before test, and railway rail pad takes out, so that more accurate to the test of rails longitudinal force.
Among the present invention, 6 pairs of vibrations of displacement measurement sensor are gathered, and the signal of being gathered is input to computing machine by amplifying with signal, in computing machine, this signal is carried out analysis of spectrum then, to determine the natural frequency of vibration and the ratio of damping of rail by FFT software (dust conversion software in the width of cloth fast).These data can compare with existing nominal data curve, judge the longitudinal force size in institute's test point rail, and the stability of prediction gapless track.Nominal data obtain can be indoor by experiment to various track structure types (as different rail, different sleeper etc.) with after demarcating under the various rail longitudinal force conditions, obtain corresponding calibration curve, this calibration curve can be stored in the computing machine and contrast automatically, should indicate the unstability section of rail in calibration curve.
Beneficial effect of the present invention: method provided by the present invention can be carried out the multiple spot actual measurement according to specific requirement, do not influence track structure and train operation, can bear longitudinal pulling force or bear under the state of longitudinal pressure and test, be not subjected to the influence of rail fastening down rail temperature at rail, implement easily, be convenient to operation.
Description of drawings
Fig. 1 is a structural diagrams of the present invention.
Fig. 2 is longitudinal force and the vibration frequency standard relationship curve map that embodiment 1 demarcates in advance.
Fig. 3 is longitudinal force and the ratio of damping standard relationship curve map that embodiment 2 demarcates in advance.
Number in the figure: 1 is test section, and 2 is rail, and 3 is fastener, and 4 is rubber mat plate, and 5 is sleeper, and 6 is displacement measurement sensor, and 7 is impulsive force.
Embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
Embodiment 1:
When the seamless track steel rail longitudinal force was tested, first rail fastening 3 with institute's test section 1 unclamped and removes, and then the rubber tie plate under rail under the fastener 4 was taken out, and the rail 2 of test section is soared in sleeper 5, and it is 10.4 meters that fastener unclamps length.Install displacement measurement sensor 6 on the rail at test section middle part, firmly hammer knocks this place's rail then, and rail is produced an impulsive force 7, makes rail produce free vibration.By the vibrational waveform of data acquisition system (DAS) record by the rail of sensor 6 collections, measure the natural frequency of vibration of vibration, and contrast with the standard relationship curve, in the frequency standard curve, find out the rail longitudinal force of respective frequencies, two results are compared, try to achieve the actual longitudinal force value of the rail of testing, rail is 60 kilograms/meter, longitudinal force and the vibration frequency standard relationship curve (as Fig. 2) demarcated of chamber by experiment, according to vibratory response frequency contrast Fig. 2 of reality test, can be in the hope of the longitudinal force in the rail.Test result is as shown in table 1.
Table 1 rail longitudinal force test result example (negative number representation pressure)
| Vibratory response frequency (Hz) | Longitudinal force (kN) |
| 9.24 | 611.5 |
| 8.36 | 94.08 |
| 8.20 | 0 |
| 7.96 | -141.1 |
| 7.80 | -235.2 |
The standard relationship curve can be in the laboratory or is on-the-spotly obtained in advance by the method for demarcating.Can choose one section jointless track, rail is 60 kilograms/meter, it is 10.4 meters that fastener unclamps length, rail is carried out destressing, at rail one end augmentor is set, respectively track is applied different load, make and produce desired longitudinal force in the rail, measure the corresponding ratio of damping and the natural frequency of vibration according to above-mentioned method then, set up the relation curve of rail longitudinal force and vibratory response damping and the relation curve of rail longitudinal force and vibration frequency like this.
Embodiment 2:
When the seamless track steel rail longitudinal force was tested, first rail fastening 3 with institute's test section 1 unclamped and removes, and then the rubber tie plate under rail under the fastener 4 was taken out, and the rail 2 of test section is soared in sleeper 5, and it is 8.4 meters that fastener unclamps length.Install displacement measurement sensor 6 on the rail at test section middle part, firmly hammer knocks this place's rail then, to rail generation-impulsive force 7, makes rail produce free vibration.By the vibrational waveform of data acquisition system (DAS) record by the rail of sensor 6 collections, the waveform of being surveyed is calculated the ratio of damping of rail vibration response, and contrast with the standard relationship curve, in the damping typical curve, find out the rail longitudinal force of corresponding damping value, the result is compared, try to achieve the actual longitudinal force value of the rail of testing, rail is 60 kilograms/meter, longitudinal force and vibration damping coefficient relation curve such as Fig. 3 are demarcated in the chamber by experiment, according to vibration damping coefficient contrast Fig. 3 of reality test, can be in the hope of the longitudinal force in the rail.Test result is as shown in table 2.
Table 2 rail longitudinal force test result example (negative number representation pressure)
| Ratio of damping | Longitudinal force (kN) |
| 0.0421 | 323.36 |
| 0.0528 | 141 |
| 0.0573 | 0 |
| 0.0592 | -94 |
| 0.0603 | -188 |
Method provided by the present invention can be carried out the multiple spot actual measurement according to specific requirement, and method of testing is identical, does not enumerate one by one here.
Claims (3)
1, a kind of method of testing of rail longitudinal force of jointless track structure is characterized in that concrete steps are as follows:
Optional one section rail is as test section, settle displacement measurement sensor thereon, by this section rail is applied a power, encourage it to produce vibratory response, displacement measurement sensor is gathered the rail vibration response data, measures the natural frequency of vibration of rail, with the rail natural frequency of vibration that obtains and the vibration frequency that pre-establishes-longitudinal force standard relationship curve contrast, in the vibration frequency typical curve, find out corresponding rail longitudinal force, can try to achieve the actual longitudinal force of the rail of testing.
2, a kind of method of testing of rail longitudinal force of jointless track structure is characterized in that concrete steps are as follows:
Optional one section rail is as test section, settle displacement measurement sensor thereon, by this section rail is applied a power, encourage it to produce vibratory response, calculate according to the waveform that displacement measurement sensor is surveyed, obtain the ratio of damping of rail vibration response, will obtain ratio of damping and the ratio of damping that pre-establishes-longitudinal force standard relationship curve contrast, in typical curve, find out corresponding rail longitudinal force, can try to achieve the actual longitudinal force of the rail of testing.
3, the method for testing of rail longitudinal force of jointless track structure according to claim 1 and 2 is characterized in that described test section length is 3～20m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610023168XA CN100523757C (en) | 2006-01-09 | 2006-01-09 | Method for measuring rail longitudinal force of jointless track structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610023168XA CN100523757C (en) | 2006-01-09 | 2006-01-09 | Method for measuring rail longitudinal force of jointless track structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101000269A true CN101000269A (en) | 2007-07-18 |
| CN100523757C CN100523757C (en) | 2009-08-05 |
Family
ID=38692328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200610023168XA Expired - Fee Related CN100523757C (en) | 2006-01-09 | 2006-01-09 | Method for measuring rail longitudinal force of jointless track structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100523757C (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102721501A (en) * | 2012-06-15 | 2012-10-10 | 大连理工大学 | Experimental method for measuring distribution of breaking longitudinal force of steel rail of railway |
| CN102733272A (en) * | 2012-05-30 | 2012-10-17 | 西南交通大学 | Steel rail detection method, system and terminal |
| CN103940673A (en) * | 2014-04-02 | 2014-07-23 | 济南力支测试系统有限公司 | Longitudinal tensile and compression testing machine for steel rail of railway track |
| CN105222942A (en) * | 2015-11-09 | 2016-01-06 | 西南交通大学 | Gapless track longitudinal force method of testing and system |
| CN107268355A (en) * | 2017-08-02 | 2017-10-20 | 中国铁道科学研究院铁道建筑研究所 | Gapless track construction fastening-down temperature of rail monitoring system and method |
| CN107328496A (en) * | 2017-08-03 | 2017-11-07 | 华东交通大学 | A kind of method based on rail vertical motion Characteristics Detection rail longitudinal force |
| CN107560764A (en) * | 2017-08-03 | 2018-01-09 | 华东交通大学 | A kind of method based on rail lateral dynamic characteristics detection rail longitudinal force |
| CN108287019A (en) * | 2018-02-02 | 2018-07-17 | 浙江恒强科技股份有限公司 | A kind of weaving electric-control system striker sensor lowest vibration response frequency quantitatively detects determination method and device |
| CN109855771A (en) * | 2018-12-31 | 2019-06-07 | 华东交通大学 | A method of TEMPERATURE FORCE is detected based on the vertical acceleration power spectral density of rail |
| CN113447163A (en) * | 2021-06-25 | 2021-09-28 | 沈阳建筑大学 | Method for measuring locked rail temperature based on overall change of steel rail mode |
| CN113847958A (en) * | 2021-09-27 | 2021-12-28 | 沈阳铁路信号有限责任公司 | Steel rail locking rail temperature detection method based on vibration mode |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4345006A1 (en) * | 1993-12-30 | 1995-07-06 | Valentin Gmbh & Co Geraetebau | Device for fastening dynamically loaded components, in particular on a rail or the like |
| DE19813335A1 (en) * | 1998-03-26 | 1999-09-30 | Mannesmann Rexroth Ag | Buffer arrangement for rail vehicles |
| JP2001253684A (en) * | 2000-03-14 | 2001-09-18 | Hitachi Ltd | Overhead crane |
| CN2550407Y (en) * | 2002-06-07 | 2003-05-14 | 同济大学 | Longitudinal force testing device for seamless line steel rail of railway |
-
2006
- 2006-01-09 CN CNB200610023168XA patent/CN100523757C/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102733272B (en) * | 2012-05-30 | 2014-11-26 | 西南交通大学 | Steel rail detection method, system and terminal |
| CN102733272A (en) * | 2012-05-30 | 2012-10-17 | 西南交通大学 | Steel rail detection method, system and terminal |
| CN102721501B (en) * | 2012-06-15 | 2014-04-02 | 大连理工大学 | Experimental method for measuring distribution of breaking longitudinal force of steel rail of railway |
| CN102721501A (en) * | 2012-06-15 | 2012-10-10 | 大连理工大学 | Experimental method for measuring distribution of breaking longitudinal force of steel rail of railway |
| CN103940673B (en) * | 2014-04-02 | 2017-05-24 | 济南力支测试系统有限公司 | Longitudinal tensile and compression testing machine for steel rail of railway track |
| CN103940673A (en) * | 2014-04-02 | 2014-07-23 | 济南力支测试系统有限公司 | Longitudinal tensile and compression testing machine for steel rail of railway track |
| CN105222942A (en) * | 2015-11-09 | 2016-01-06 | 西南交通大学 | Gapless track longitudinal force method of testing and system |
| CN105222942B (en) * | 2015-11-09 | 2017-12-12 | 西南交通大学 | Gapless track longitudinal direction force test method and system |
| CN107268355A (en) * | 2017-08-02 | 2017-10-20 | 中国铁道科学研究院铁道建筑研究所 | Gapless track construction fastening-down temperature of rail monitoring system and method |
| CN107328496A (en) * | 2017-08-03 | 2017-11-07 | 华东交通大学 | A kind of method based on rail vertical motion Characteristics Detection rail longitudinal force |
| CN107560764A (en) * | 2017-08-03 | 2018-01-09 | 华东交通大学 | A kind of method based on rail lateral dynamic characteristics detection rail longitudinal force |
| CN108287019A (en) * | 2018-02-02 | 2018-07-17 | 浙江恒强科技股份有限公司 | A kind of weaving electric-control system striker sensor lowest vibration response frequency quantitatively detects determination method and device |
| CN109855771A (en) * | 2018-12-31 | 2019-06-07 | 华东交通大学 | A method of TEMPERATURE FORCE is detected based on the vertical acceleration power spectral density of rail |
| CN113447163A (en) * | 2021-06-25 | 2021-09-28 | 沈阳建筑大学 | Method for measuring locked rail temperature based on overall change of steel rail mode |
| CN113847958A (en) * | 2021-09-27 | 2021-12-28 | 沈阳铁路信号有限责任公司 | Steel rail locking rail temperature detection method based on vibration mode |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100523757C (en) | 2009-08-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100523757C (en) | Method for measuring rail longitudinal force of jointless track structure | |
| CN107560764B (en) | A method of rail longitudinal force is detected based on rail lateral dynamic characteristics | |
| CN105783799B (en) | A kind of fragment-free track slab gap depth lossless detection method and equipment based on vibration | |
| CN107328496B (en) | A method of based on rail vertical motion Characteristics Detection rail longitudinal force | |
| Karoumi et al. | Monitoring traffic loads and dynamic effects using an instrumented railway bridge | |
| CN102980756B (en) | The method of testing of dynamic stiffness and system | |
| CN100372719C (en) | Apparatus for and methods of stress testing metal components | |
| CN110210132B (en) | Wheel polygonal trackside detection method based on piezoelectric acceleration sensor | |
| CN110055834B (en) | Dynamic stiffness design method | |
| CN101660958B (en) | Longitudinal force measuring method of seamless track steel rail | |
| CN101532919B (en) | Dynamic and static combination method used for engineering structure health diagnosis | |
| CN2550407Y (en) | Longitudinal force testing device for seamless line steel rail of railway | |
| CN109990967B (en) | Dynamic and fatigue performance detection device and method for steel rail assembly fastener system | |
| CN109269789B (en) | Fastener and sleeper integrated experimental loading device | |
| CN108318126B (en) | Method for detecting rigidity of rail lower base plate based on vertical vibration characteristic of steel rail | |
| CN100429106C (en) | Force detector and detection method for stress generated by defferent temp of long rail | |
| CN110936977B (en) | Method for detecting loosening of fastener of high-speed ballastless track structure | |
| CN108327742B (en) | A method of equivalent support stiffness under rail is detected based on rail lateral dynamic characteristics | |
| CN113051705B (en) | Method for accurately predicting rail temperature of steel rail | |
| Li et al. | Estimating clamping force of rail fastener system by experimental and numerical methods | |
| CN105651441A (en) | Sleeper bearing reaction test method | |
| Tournay et al. | The effect of high impact wheel loads on rail fracture from transverse defects | |
| Unluoglu et al. | Predicting Dynamic Contact Stresses at Crosstie–Ballast Interface Based on Basic Train Characteristics | |
| CN111896203B (en) | Method for testing vibration energy attenuation rate of steel rail damper | |
| Liu et al. | Study on Determining the Vertical Wheel-Rail Force by Measuring Rail Displacement |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090805 Termination date: 20150109 |
|
| EXPY | Termination of patent right or utility model |