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Development of a vehicle-track interaction model to predict the vibratory benefits of rail grinding in the time domain

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Journal of Modern Transportation 2015年第3期23卷 189-201页

作者： Julia Irene Real clara zamorano José Luis Velarte Antonio Enrique Blanco University Institute for Multidisciplinary Mathematics Polytechnic University of Valencia Foundation for the Research and Engineering in Railways

Imperfections in the wheel-rail contact are one of the main sources of generation of railway vibrations. Consequently, it is essential to take expensive corrective maintenance measures, the results of which may be unknown. In order to assess the effectiveness of these measures, this paper develops a vehicle-track interaction model in the time domain of a curved track with presence of rail corrugation on the inner rail. To characterize the behavior of the track, a numerical finite element model is developed using ANSYS software, while the behavior of the vehicle is characterized by a unidirectional model of two masses developed with VAMPIRE PRO software. The overloads obtained with the dynamic model are applied to the numerical model and then, the vibrational response of the track is obtained. Results are validated with real data and used to assess the effectiveness of rail grinding in the reduction of wheel-rail forces and the vibration generation phenomenon.

关键词： Corrugation · Dynamic overloads · Finiteelement method · Vibrations

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Critical Factors in Financing and Management of Light Rail Transit Systems： Delphi Methodology Approach

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Journal of Civil Engineering and Architecture 2013年第11期7卷 1385-1397页

作者： Julian Sastre Gonzalez clara zamorano Martin Royal School of Engineering University of Seville Sevilla 41007 Spain Civil Engineering Department Foundation Caminos de Hierro Madrid 28002 Spain

In recent years, a large number of LRT (light rail transit) networks and tramways have been built in Spain using the tender system. The rhythm of construction has been such that very few analyses have been carried out and those that have were only partially done because the main participants involved had ulterior motives which impeded their having a critical and independent opinion of the projects carried out. Within this framework, the Delphi methodology presents itself as a very useful instrument, as the intrinsic advantages that it has added to the characteristic that the experts who participate in the project can remain anonymous without detracting value from the conclusions obtained as these are grouped together according to their worth.

关键词：轻轨系统德尔菲法方法论管理融资有轨电车优势组合西班牙

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