Turnout steel rail variable cross-section-based wheel rail geometric contact point calculation method

Abstract

The invention discloses a turnout steel rail variable cross-section-based wheel rail geometric contact point calculation method, which comprises the following steps of constructing a wheel coordinatesystem, making a plane x' = 0 in the wheel coordinate system to cut a wheel, and taking an intersection line of the plane x' = 0 and the periphery of the wheel as a main contour line; equally dividingthe wheel in the normal angle range of the two sides of the main contour line into n parts in the normal direction, and obtaining n sub-contour lines; cutting the steel rail through a plane x' = 0 toobtain a profile data set of a stock rail side and a turnout zone; and according to the main contour line of the wheel, the sub-contour line of the wheel and the contour data set of the stock rail side and the turnout zone, calculating the wheel rail geometric contact point to obtain a wheel rail geometric contact point calculation result. According to the method, the variable cross-section characteristic of the turnout zone steel rail is considered, large errors generated by turnout zone wheel rail geometric contact point calculation in the prior art are avoided, and the calculation result is accurate.

Description

technical field [0001] The invention belongs to the field of rail transportation, and in particular relates to a method for calculating wheel-rail geometric contact points based on the variable section of the turnout rail. Background technique [0002] The wheel-rail contact geometry is the basis of the wheel-rail relationship research, and the premise of determining the wheel-rail motion attitude, wheel-rail interaction and wheel-rail dynamic equation. Due to its function of realizing train transfer or crossing lines, there are multiple track layouts in the turnout area. Compared with the section line, the turnout area has a changeable wheel-fork contact geometry. When the train crosses the turnout, the transmission of the dynamic interaction between the vehicle and the turnout is realized through the wheel-rail contact geometry. Therefore, it is very important to study the geometric relationship of the wheel-rail contact in the quasi-static turnout area, establish a wheel...

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned shortcomings in the prior art, the present invention provides a method for calculating the geometric contact point of the wheel and rail based on the variable section of the turnout rail, which solves the problem in the prior art that the calculation error of the geometric contact point of the wheel and rail is large when the wheel set shakes its head

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