The way to determine the longitudinal stress state rail lashes welded railway track

 

(57) Abstract:

The invention relates to the field of condition monitoring of railway line. According to the proposed method periodically measure the temperature plots rail lashes and calculate the temperature of the longitudinal voltage tthe plots. Simultaneously with temperature measurement stations rail lashes define longitudinal strain plots from external forces or changes in the road condition and calculated longitudinal stress dsites caused by these deformations. Next, summarize the found tand dand get the actual value of the longitudinal stresses in the sections on the parcel boundary rail scourge, then build a plot of the longitudinal stresses along the length of the rail scourge. The method allows to determine the longitudinal stress state rail scourge caused not only by changes in its temperature relative to the temperature of the fixing, but also deformations of the rail stations scourge along its length. This positively affects the efficiency of the control.

The invention relates to a method of determining the longitudinal stress state rail lashes seamless tra is Aulnay stresses in continuously welded rail to prevent ejection path.

A device for measuring the longitudinal displacement of the rail scourge railroad tracks that implements the measurement of the longitudinal displacements of the rail scourge throughout the length of a string (RU # 2174082 C1, 61 K 9/08, 27.09.2001 year).

The known device only allows to measure (fix) the longitudinal displacement of the sections of rail scourge and does not determine the longitudinal stress state rail stations scourge (not defines deformation plots rail scourge and longitudinal stresses in these areas).

Known mobile control computer diagnostic system that implements the method of controlling the position of a railway (regulation of rail lashes level, in plan and profile, the temperature of the rail lashes) (RU # 2066645 C1, B 61 K 9/08, 20.09.1996,).

The complex does not provide a measurement of the longitudinal displacements of the rail scourge and defining a longitudinal stress state rail stations scourge, because it does not have funds for such a definition.

There is a method of determining the state of the rail-sleeper grid operated welded rail track, which consists in the fact that periodically izmerenie values of longitudinal compressive every scourge forces (longitudinal voltage rail lashes) (RU # 2038441 C1, E 01 B 35/00, 27.06.1995 year).

This method of determining the state of the rail-sleeper grid (rail lashes) welded rail track allows determining the average value of the longitudinal compressive strength (average value of the longitudinal voltage on a corresponding rail of the scourge caused by temperature changes during the operation of train paths relative to the temperature of the fixing each rail of the scourge, and determine theoretical by the transverse component of thermal force, which is then compared with the allowable value.

In a known manner, it is impossible to determine the actual longitudinal stress state rail lashes, because in this way are not taken into account longitudinal strain plots rail lashes caused by external force or by changes in the road condition. Due to the unequal pressure of the sole of the scourge to the lining (podrelsovoe basis) for the length of a string, uneven compaction of the ballast, and in accordance with this and unequal resistance to longitudinal shear rail-sleeper grid in ballast along the length of the scourge, unequal power influences the longitudinal forces from the train on the length of a string (if Yelizovo scourge can be different, consequently, the longitudinal stress state of the sections of each rail scourge may be different.

The technical result of the invention is the determination of the longitudinal stress state rail stations scourge welded rail track, caused not only by changes in its temperature relative to the temperature of the fixing, but also deformations of the rail stations scourge along its length.

To achieve this, the technical result in the method of determining the longitudinal stress state rail lashes welded rail track, which periodically measures the temperature on the areas of rail lashes and define longitudinal thermal stresses in continuously welded rail, simultaneously with temperature measurement stations rail lashes measured in the longitudinal displacements of rail lashes, define longitudinal strain plots rail lashes and longitudinal stresses caused by them, and then determine the longitudinal stress plots rail lashes with respect to changes in their temperature and longitudinal strain.

The way to determine the longitudinal stress state rail platnyh on roaming on railway vehicle, for example on the wagon potenzmitel, measure the temperature plots rail scourge, simultaneously with temperature measurement stations rail scourge measure longitudinal displacement (movement) of the cross sections of the scourge on the parcel boundaries that separated rail whip, i.e. simultaneously with temperature measurement stations rail scourge measure the longitudinal displacement of the rail stations of the scourge. The boundaries of rail whips mark by applying a fixed point, the lines on the upper part of the sole rail scourge, for example after 100 metres, or otherwise, but with the obligatory fixation distance between control sections. Along the railway line or directly in the path at a certain distance from each other place fixed fixed reference points. As fiducials can be used, for example, sleepers, were excluded from the longitudinal of the rail lashes. Measurement of the longitudinal displacements of the rail scourge relatively frames are produced using non-contact sensors mounted on the mobile unit, for example on the carriage, moving the carriage one of the sensors detects a fixed point or line on the upper part of podos the bus of the computer software, installed on the car, and the measured values of temperature and longitudinal displacements of the rail lashes come in a computing unit computing machine. In an automatic data processing machine data is available about the fusing temperature measured rail scourge. In the computing unit of the machine is determined by the difference between the measured temperature of the section of rail scourge and the temperature of the fixing rail scourge is determined by the temperature voltage corresponding section of rail scourge ratio

t=·E·ti,

where

the coefficient of linear extension rail scourge;

E - the modulus of elasticity of rail scourge;

ti- the difference between the measured temperature (tithe respective section of rail scourge and the fusing temperature (t3rail scourge.

That is,

t=·E·(ti-t3).

In the computing unit of the machine is also defined by the longitudinal deformation of each section of rail scourge, i.e. the change in length of each section of rail scourge the original, which is a plot of the scourge had in the initial period of operation (after laying a whip). Pidom track section of the scourge, caused by these deformations, in accordance with a ratio of

where

andithe magnitude of the longitudinal displacement at the beginning of the i-section rail scourge (the amount of longitudinal movement of a fixed point on the rail lashes at the beginning of its i-section in the direction of travel of the car);

ai+1- the magnitude of the longitudinal displacement of the rail lashes at the end of i-site;

(ai-ai+1- the value of the longitudinal deformation of the rail scourge within the i-site.

Values andi, ai+1during movement of the carriage taken with the sign “ + ” and against the motion with the sign “-”

After this calculation computing unit computing machine summarises tand dgets the value of the actual longitudinal stresses in the sections on the parcel boundary rail lashes and builds a plot of the longitudinal stresses along the length of the rail scourge.

The claimed method provides operational control over the longitudinal stress state sections of rail lashes welded railway track.

The way to determine the longitudinal stress state rail lashes welded rail track, Zack the major longitudinal voltage tplots, characterized in that simultaneously with temperature measurement stations rail lashes define longitudinal strain plots from external forces or changes in road condition, calculated longitudinal stress dsites caused by these deformations, summarize found tand dand get the actual value of the longitudinal stresses in the sections on the parcel boundary rail scourge, then build a plot of the longitudinal stresses along the length of the rail scourge.



 

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FIELD: railway transport; measuring facilities.

SUBSTANCE: invention relates to special purpose devices for measuring separate geometric parameters of reinforced concrete ties, i.e. propelling and canting of rail flats on reinforced concrete ties. Proposed device contains housing 1 with fitted-on transport handle 2, right-hand support 3 and left-hand support 4. First support screw 5 and second support screw 6 are installed on right-hand support 3, third support screw 7 and fourth support screw 8 are installed on left-hand support 4, right-hand catcher 9 and left-hand catcher 10 are installed on ends of housing 1, sensor 11 is secured on first support screw 5. Housing 1 carries also right-hand orientation handle 13 with pushbutton 15 and left-hand orientation handle 14. Base 16 is fastened in central part of housing 1, controller 17 and supply compartment 18 being secured on base 16. Device for measuring rail flat canting contains housing 1 with fitted-on transport handle 2, right-hand support 3 and left-hand support 4. First support screw 5 and second support screw 6 are installed on right-hand support 3. And third support screw 7 and fourth support screw 8 are installed on left0hand support 4. Right-hand catcher 9 and left-hand catcher 10 are installed on ends of housing 1, first sensor 11 is secured on first support screw 5, and second sensor 19 is installed on fourth support screw 8. Housing 1 carries right-hand orientation handle 13 with pushbutton 15, and left-hand orientation handle 14. Base 16 with fitted-on controller 17 and supply compartment 18 is secured in central part of housing 1. Moreover, support 21 is connected to housing 1 through vertical rods in central part.

EFFECT: improved efficiency of measurements, increased accuracy and provision of operative measurement of parameters under checking.

3 cl, 2 dwg

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