The irregular wear of carbon current collector pantograph strips increases the railway maintenance costs and introduces safety hazards in the railway operation. This paper presents a method for analyzing the irregular wear of carbon strips with numerical dynamic analyses and modal tests. The carbon strips were studied in laboratory tests, and an equivalent numerical model for the investigation of their irregular wear and performance improvement was established. The results from the computational simulations were evaluated based on the laboratory results, and the correlation between the high-frequency vibration and irregular wear of the carbon strips was studied. The irregular wear contour of the carbon strips coincides with the high-frequency mode shape according to the experimental and numerical results. Moreover, the dynamic design for carbon strips was optimized with the validated computational model. The results suggest that the optimized schemes effectively mitigate the irregular wear of carbon strips.

中文翻译：

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受电弓碳带的不规则磨损高频振动分析及优化

碳集电器受电弓带的不规则磨损增加了铁路维护成本，并在铁路运营中带来了安全隐患。本文提出了一种通过数值动力学分析和模态试验分析碳带不规则磨损的方法。在实验室测试中对碳带进行了研究，并建立了用于研究碳带不规则磨损和性能改善的等效数值模型。根据实验室结果对计算模拟的结果进行了评估，并研究了高频振动与碳带不规则磨损之间的相关性。根据实验和数值结果，碳带的不规则磨损轮廓与高频模式形状一致。此外，通过验证的计算模型对碳带的动态设计进行了优化。结果表明，优化方案可以有效减轻碳带的不规则磨损。