Effect of uncertainty of fastening systems properties on wheel/rail dynamic force

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2021-06-18 DOI:10.1590/1679-78256537

J. Sadeghi, Mohammad Seyedkazemi, A. Khajehdezfuly

引用次数: 4

Abstract

Abstract In this paper, effect of uncertainty of fastening system properties on the wheel/rail dynamic force (WRDF) was investigated. For this purpose, two deterministic and epistemic models of vehicle/track interaction were developed, using the finite element method. Validity of the results obtained from the models was shown through comparison between the model results and those obtained from field tests. The effects of uncertainty of fastening system properties on the WRDF in different axle loads, vehicle speeds, rail irregularities and various track maintenance conditions were derived through probability and sensitivity analyses. Using the results obtained, some contours were developed to obtain the amplification of WRDF (due the uncertainty of fastening system properties) as a function of vehicle axle load, vehicle speed and track maintenance conditions.

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紧固系统性能的不确定性对轮轨动力的影响

摘要本文研究了扣件系统性能不确定度对轮轨动力的影响。为此，使用有限元方法开发了两个车辆/轨道相互作用的确定性和认识性模型。通过将模型结果与现场试验结果进行比较，表明了模型结果的有效性。通过概率分析和灵敏度分析，得出了在不同轴重、车速、轨道不平顺和各种轨道维护条件下，紧固系统性能的不确定性对WRDF的影响。利用获得的结果，开发了一些等高线，以获得WRDF的放大（由于紧固系统特性的不确定性），作为车辆轴重、车辆速度和轨道维护条件的函数。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.