Individualized railway steel rail grinding target profile design method

A design method and profile technology, applied in the field of railway line engineering, can solve problems such as unsatisfactory effects and unconsidered problems, and achieve the effect of improving wheel-rail dynamic performance and ensuring rationality

Active Publication Date: 2018-09-28
中铁物总运维科技有限公司
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AI Technical Summary

Problems solved by technology

This method has a good improvement in the wheel-rail contact relationship for fixed line types and fixed vehicle models, but the existing problems are similar to the seco

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  • Individualized railway steel rail grinding target profile design method
  • Individualized railway steel rail grinding target profile design method
  • Individualized railway steel rail grinding target profile design method

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Embodiment Construction

[0030] The present invention will be described in further detail below.

[0031] A kind of personalized railway rail grinding profile design method of the present invention is specifically realized through the following steps:

[0032] Step 1: Determine the railway line rails and line parameters that need to be ground, including curve radius, superelevation, slope, circular curve length, transitional curve length, actual speed of vehicles, etc. At the same time, the curve part of the line is classified according to the radius gradient of 100-200. According to the classification, the basic conditions of the rails in the sections that need to be polished are measured, the rail profiles of different gradient radius curves and straight lines are measured, and the main disease forms and severity of the collected different radius gradient curves and straight rails are determined.

[0033] Step 2: sort out all the running vehicles (trucks, passenger cars, bullet trains, high-speed r...

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Abstract

The invention provides an individualized railway steel rail grinding target profile design method. The method includes the steps that 1, steel rail profiles with different gradient radius curves and lines are measured; 2, wheel profiles corresponding to different types of vehicles are acquired; 3, a steel rail grinding target profile bank is established; 4, a real parameter wheel and track coupling model is established; 5, non-dynamic wheel and track contact relationships between actually-measured wheel profiles in different vehicle models and steel rail profiles in the target profile bank arecalculated, and the steel rail profiles with the high parameter limit exceeding rates are abandoned when the steel rail profiles are matched with the different actually-measured wheel profiles; 6, analysis and simulation are conducted on the vehicle-track coupling dynamic performance of the obtained steel rail profiles and the different wheel profiles in the set radius passing process, a wheel and track contact dynamic index serves as a criterion, and scanning is conducted; and 7, target profile comparison and selection based on the minimum grinding amount are conducted. By the adoption of the method, the conditions of an actual line, steel rails, vehicles and wheels are considered, an obtained result is good in pertinence, and individualized target control of steel rail grinding can be achieved.

Description

technical field [0001] The invention belongs to the technical field of railway line engineering and relates to a personalized railway rail grinding profile design method. Background technique [0002] Rail grinding refers to the removal of part of the metal on the surface of the rail, the elimination of rail surface defects, the correction of the shape of the rail head, and the purpose of eliminating and slowing down the occurrence and development of rail defects and improving the wheel-rail contact relationship, thereby effectively extending the rail. service life. [0003] Rail grinding technology originated in the 1950s. After more than 60 years of development, it has become an important rail repair technology for high-speed and heavy-haul railways. my country's railways introduced rail grinding technology in the 1980s. At present, most railway bureaus have been equipped with large rail grinding vehicles with 48 grinding heads and 96 grinding heads. Rail grinding has gra...

Claims

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Application Information

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IPC IPC(8): E01B31/17
CPCE01B31/17
Inventor 王军平赵向东李东宇
Owner 中铁物总运维科技有限公司
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