Research on Measuring Rail-wheel Contact Points During Operation of High-speed Rolling Stocks

被引：0
|
作者：
Jin X. [1 ]
Sun S. [1 ]
Li Q. [1 ]
机构：
[1] School of Mechanical and Electronic Engineering, Beijing Jiaotong University, Beijing
来源：
Tiedao Xuebao/Journal of the China Railway Society | 2019年 / 41卷 / 04期
关键词：
Calibration equipment; High-speed instrumented wheelset; Wheel load; Wheel stress; Wheel-rail contact points;
D O I：
10.3969/j.issn.1001-8360.2019.04.006
中图分类号：
学科分类号：
摘要：
Wheel-rail contact points play an important role in deepening analysis of wheelset running dynamic behavior, safety, wheel-rail contact state and force. An improved approach for measuring wheel rail contact points was put forward based on the traditional method of measuring wheel-rail forces by means of wheel web stress as well as the influence of wheel tread wear. The stress distributions on wheel web surface was analyzed by using FEM program ANSYS when vertical, lateral and longitudinal forces were applied at different positions along wheel tread respectively. The calculation results show that radial stress distributions along the transverse surface of the web hole present a specific law of change via the load positions, i.e., contact points, which provides a possibility for measuring wheel-rail contact points. The studies show that there exist stress regions insensitive to the lateral and longitudinal forces in the specific areas of wheel web, which can eliminate interference effects caused by lateral and longitudinal forces. According to the calculation and test results, the measuring approach is modified for on-track test, and the best arrangements and bridges of strain gauges are developed on the wheel. The reliability and anti-interference of measuring circuit are improved with higher measuring accuracy. The influence of wheel tread wear and turning repair on the stress distributions on wheel web surface was analyzed, and a modified test matrix was given. This improved its measurement precision and scope of application about on-line test. Finally, the development of test wheelset was done, and field operating measurement was completed to obtain and collect the data of contact points under operational conditions. © 2019, Department of Journal of the China Railway Society. All right reserved.
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页码：41 / 47
页数：6
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