Study on Performance Optimization and Feasibility of No.9 Turnout with 1520 mm Gauge in China

To address the issues of poor geometric dimension retention, short component lifespan, and heavy maintenance workload of the 1520 mm gauge 50 kg/m rail No.9 turnout, a new design was proposed for the 1520 mm gauge 60 kg/m rail No.9 turnout. Based on the new design’s plane alignment, structural features, and other requirements, dynamic models of the vehicle–turnout system, the turnout conversion model, and the continuous welded rail turnout (CWR turnout) model were established. The focus was on analyzing the dynamic response of the vehicle when passing through the 1520 mm gauge 60 kg/m rail No.9 turnout, as well as its switching performance. The feasibility of applying CWR technology to this turnout was also explored. The results indicate that the dynamic indicators of the vehicle passing through the 1520 mm gauge 60 kg/m rail No.9 turnout meet the regulatory requirements; the maximum switching force at the traction point is 1.807 kN, which is less than the rated power of the switch machine; and the rail strength and track stability of the CWR turnout model all meet the design specifications.