Given the demand for real-time operation state simulation technology for integrating significant amounts of renewable energy into the traction power systems (TPSS), and considering the substantial volatility and intermittence of renewable energy (photovoltaic) output, the accuracy and real-time performance of traditional mechanism simulation models are low. This paper proposes a new digital twin (DT)

With the rapid construction of rail transportation infrastructure, vibration issues caused by wheel–rail interactions during train operation have become a significant concern. Excessive vibration can lead to rail defects, such as corrugation, and also cause environmental vibration and noise problems in surrounding buildings. Rail dampers have been proposed to mitigate these issues by reducing rail

The safety features of Electric Multiple Units (EMUs) are intricate and redundant, and the associated data is massive, multi-sourced, heterogeneous, and interdisciplinary. Constructing appropriate safety feature quantities by fully and effectively utilizing this data is a prerequisite for establishing a safety prevention and control network for EMUs. This paper proposes a model that matches risks in

Wheel-rail force identification is one of the most challenging issues in the railway industry, which can provide real-time safety evaluation and fault diagnosis for railway vehciles in operation. A new real-time polygonal wheel-rail force identification method is proposed. Firstly, aiming at the characteristic of high-order polygon feature frequency of wheelset, multi-rigid dynamics model and flexibility-rigid

To further investigate the impact of prestressing on the internal force and deformation of the double-system composite guideway (DSCG), theoretical equations for internal force and deformation were established based on the principle of energy variation. The theoretical results were validated through finite element modelling and elastic analysis methods. The proposed DSCG theoretical model, derived

Resilient wheel (RW) is gradually promoted for use in China’s subway vehicles recent years, which has been widely used in tram in Europe and China. As measured, the RWs in service on the metro trains have experienced eccentric wear and even polygonization of high order after 30,000 km running. Given that most subway lines have small curve radii, this study assesses the operation safety of vehicle passing

Enhancing the resilience of train timetables can effectively improve their resistance and recovery capabilities against operational disturbances, thereby ensuring the stable operation of the railway system and the quality of passenger transportation services. This paper defined timetable resilience as three parts: disturbance absorptive capacity, resistance capacity, and post-disturbance recovery capacity

As the scale of development continues to expand, carbon emissions of urban rail transit (URT) in China have gradually increased each year, posing certain pressure on the carbon emission reduction efforts in the URT industry. To evaluate the current status of low-carbon development in the URT industry, this paper first constructs an annual carbon emission accounting model for URT that considers both

The urban rail transit (URT) system in China has undergone development spanning over 50 years. In the period from 2008 to 2015, numerous URT lines were under construction. After 2015, an increasing number of cities have transitioned to multi-line network operations, with greater emphasis on system efficiency and passenger service. This transition has been accompanied by numerous successful innovations