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181.
182.
Jean-Pierre Massat Etienne Balmes Jean-Philippe Bianchi Guido Van Kalsbeek 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2015,53(3):370-379
OSCAR (Outil de Simulation du CAptage pour la Reconnaissance des défauts) is the pantograph–catenary dynamic software developed by Société Nationale des Chemins de fer Français (SNCF) since 2004. A three-dimensional finite element (FE) mesh allows the modelling of any catenary type: alternating current (AC) or direct current (DC) designs, and conventional or high-speed lines. It is a representative of the real overhead line geometry, with contact wire (CW) irregularities, staggered alignment of the CW, dropper spacing, wire tension, etc. Nonlinearities, such as slackening of droppers and unilateral contact between the pantograph and the CW, are taken into account. Several pantograph models can be used, with a complexity level growing from the three-lumped-mass model to the multibody model. In the second case, a cosimulation between the FE method catenary and the multibody pantograph models has been developed. Industrial features for pre- and post-treatments were developed to increase robustness of results and optimise computation time. Recent developments include volume meshing of the CW for stress computation or statistical analysis and lead to new fields of studies such as fatigue failure or design optimisation. OSCAR was fully validated against in-line measurements for its different AC and DC catenary models as well as its different pantograph models (with independent strips for instance) and has continuously been certified against EN50318 since 2008. 相似文献
183.
Lars Finner Gero Poetsch Bernhard Sarnes Michael Kolbe 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2015,53(3):305-313
DB Systemtechnik is a high-performing, customer-driven service provider that, as well as authoritatively serving the Deutsche Bahn Group by dint of its specialist knowledge is also increasingly active on the global railway market. Development and testing of pantograph models and catenary systems have been part of the company's essential activity fields from the beginning. Therefore, an efficient and high-performing simulation tool is indispensable. That is why DB Systemtechnik spent high efforts to develop the program PrOSA in cooperation with the Heinz–Nixdorf–Institut (HNI) of the university Paderborn to simulate the interaction of pantograph and catenary. This article gives an overview of the most relevant properties of PrOSA. Furthermore, it is described how the benchmark requirements were implemented and processed. 相似文献
184.
随着列车运行速度的提高,气动噪声在总噪声中所占的比重越来越大,降低气动噪声已成为影响高速铁路可持续发展的关键问题。在理论研究基础上,采用了混合法来研究高速动车组受电弓周围的气动噪声特性。首先,对高速列车在RANS(雷诺平均模拟)方法计算下的统计结果进行分析,研究高速列车受电弓区域的流场特征。然后,应用非线性声学求解方法(NLAS)研究近场噪声,分析了不同部位对气动噪声的贡献。最后,采用FW-H声学比拟方法来分析远场气动噪声,通过不同测试点研究了远场噪声分布特性。 相似文献