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Parameter Optimization of Stitch Wires in Four-Span Overlap Sections of High-Speed Railway Catenary

Author(s)

Junqing Chen1, Xiaolei Hu2,*, Jinfa Guan1, Yicheng Xiang1, Jiayu Fu1

Affiliation(s)

1Southwest Jiaotong University, Chengdu, Sichuan, China 2Beijing–Shanghai High-Speed Railway Co., Beijing, China *Corresponding Author

Abstract

To identify optimal stitch-wire configurations in four-span overlap sections, a finite-element pantograph-catenary model was developed. Four layouts were compared: stitch wires installed throughout the overlap, only at the center pole, none, or throughout with an electric connector. The front pantograph was insensitive to layout, but the rear pantograph showed significant differences. Installing the stitch wire throughout the overlap improved rear-pantograph minimum contact force and reduced its standard deviation, yielding best stability; adding an electric connector had limited effect. Optimal stitch wire tension is 3000 to 3500 N and length 14-18 m (16 m optimal). These findings support structural optimization of high-speed railway overlap sections.

Keywords

Overlap Section; Stitch Wire; Pantograph-Catenary Interaction; Contact Force; Parameter Optimization

References

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