A calculation method of wheel-rail geometric contact point based on variable cross-section of turnout rail

Abstract

The invention discloses a wheel-rail geometric contact point calculation method based on the variable cross-section of a switch rail, comprising the following steps: constructing a wheel coordinate system, cutting the wheel with a plane x'=0 in the wheel coordinate system, and setting the plane x'=0 The intersection line with the periphery of the wheel is used as the main contour line; the normal direction of the wheel within the normal angle range on both sides of the main contour line is equally divided into n parts to obtain n sub-contour lines; the rail is cut through the plane x'=0 to obtain the basic The profile data set of the rail side and the switch area; the wheel-rail geometric contact point is calculated according to the main contour line of the wheel, the sub-contour line of the wheel, and the contour data set of the basic rail side and the switch area, and the calculation of the wheel-rail geometric contact point is obtained. result. The invention takes into account the variable cross-section characteristics of the rail in the switch area, avoids large errors in the calculation of the wheel-rail geometric contact point in the switch area in the prior art, and has accurate calculation results.

Description

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

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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