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- Title
弓网关系缩比模型设计方法研究.
- Authors
刘文正; 伊金浩; 张坚; 李鑫; 黄朝阳
- Abstract
When the train speed increases, the quality of pantograph-catenary current collection diminishes, and even offline occurs. Due to the influence of wheel rail vibration and aerodynamic excitation, the pantographcatenary vibration increases. It is difficult to comprehensively analyze the impact of influencing factors on current collection characteristics on actual lines and existing experimental platforms affected by actual conditions or site factors. Therefore, this paper presented a study on the design method of pantograph-catenary scaled model to conduct experimental research on the relationship between pantograph and catenary during high-speed train operation from a small site, and comprehensively analyzed the impact of the factors on current collection characteristics. The main method was proposed based on the similarity theory and a calculation method for the scaled coefficient of simple catenary-pantograph. Then, the similarity relationship of key parameters of the scaled model was selected, and designed methods and parameters based on geometric similarity and geometric dissimilarity models of actual materials were proposed based on the calculation results of the scaled coefficient and the degree of influence of actual material properties on the pantograph-catenary relationship. Finally, based on the structural parameters of the original model and the scaled model, a pantograph-catenary model was established in the simulation software using the finite element method, and the rationality of the scaled model was verified from the perspective of static and dynamic characteristics. The results show that the variation rules in static and dynamic parameters such as catenary stiffness, natural frequency, contact force and offline characteristic parameters of the scaled model are basically consistent with those of the original model, and the error is within an acceptable range. This indicates that the calculation method of the scaled coefficient and the design method and results of the pantograph-catenary scaled model proposed in this paper are reasonable and can be further applied to the study of the pantograph-catenary relationship of high-speed railway, and a theoretical method is also provided for the construction of the pantograph-catenary reduction experimental platform.
- Subjects
HIGH speed trains; FINITE element method; CATENARY; GEOMETRIC modeling; PANTOGRAPH; EXPERIMENTAL design
- Publication
Journal of Railway Science & Engineering, 2023, Vol 20, Issue 10, p3976
- ISSN
1672-7029
- Publication type
Article
- DOI
10.19713/j.cnki.43-1423/u.T20222303