Worn steel rail polishing target profile rapid design method

A design method and rail technology, applied in computer-aided design, design optimization/simulation, calculation, etc., can solve problems affecting rail grinding construction efficiency, long calculation cycle, and large amount of calculation, achieve good engineering application value, improve design Efficiency, the effect of improving efficiency and precision

Active Publication Date: 2017-07-14
XI'AN PETROLEUM UNIVERSITY
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AI Technical Summary

Problems solved by technology

This design method has the problems of large calculation amount and long calculation cycle, which affects the efficiency of rail grinding construction

Method used

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  • Worn steel rail polishing target profile rapid design method
  • Worn steel rail polishing target profile rapid design method
  • Worn steel rail polishing target profile rapid design method

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Embodiment Construction

[0038] In order to make the purpose, technical solution and advantages of the present invention clearer and clearer, the specific content of the present invention will be further described below in conjunction with the accompanying drawings, but the specific embodiments of the present invention are not limited thereto.

[0039] Such as figure 1 As shown, a rapid design method for the grinding target profile of worn rails includes the following steps:

[0040] 1) build as figure 2 As shown in the global coordinate system of the rail profile, the rail profile scanner is used to obtain the data point coordinates of the profile of the worn rail section, which are used as the type value points of the NURBS curve to construct the polished cross-sectional profile of the worn rail based on the cubic NURBS curve Shape curve parametric model;

[0041] Described step (1) specifically comprises the following steps:

[0042] (1.1) Take the center of the rail top as the origin, take the...

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Abstract

The invention relates to a worn steel rail polishing target profile rapid design method. The worn steel rail polishing target profile rapid design method comprises constructing a parameterized model of a worn profile by means of a cubic NURBS curve; establishing a Kriging model of the worn steel rail polishing target profile performance by taking an adjustable weight factor of the NURBS parameterized model of the worn steel rail profile as the design variable and taking the wheel-rail contact stress and the wheel-rail dynamics performance index as dependent variables; establishing an optimization design model of the steel rail polishing target profile by taking the adjustable weight factor as the design variable and taking the Kriging model of the steel rail polishing target profile performance as the target function, and achieving the optimal design of the worn steel rail polishing target profile. According to the invention, the polishing target profile of any worn steel rail can be designed rapidly, and the worn steel rail polishing target profile rapid design method is characterized by being high in design efficiency and accurate in design result, and the problem that when a steel rail needs to be polished, the accuracy of the polishing target profile needs to be checked repeatedly by means of a numerical simulation method, and therefore the design efficiency is low is solved.

Description

technical field [0001] The invention belongs to the technical field of mechanical engineering rail grinding, in particular to a method for rapidly designing the profile of a grinding target of worn rails. Background technique [0002] Grinding of high-speed railway rails can improve the running stability and stability of the vehicle. Before the rail grinding construction, in order to ensure the optimal vehicle running performance after the rail grinding, it is usually necessary to grind the rails according to the damage of the grinding line rails before grinding The target profile is designed to ensure optimum wheel-rail contact. However, due to differences in vehicle loads and working conditions, the profiles of worn rails vary widely. Before each grinding operation, it is necessary to redesign the target profile of rail grinding according to the wear of the rails. At present, the empirical design method is mainly used to determine the initial grinding target profile of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F2111/04G06F30/23G06F30/17G06F2119/06
Inventor 曾威宋红任涛孙文岳治
Owner XI'AN PETROLEUM UNIVERSITY
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