Design method of the variable cross-section tunnel focused on improving passenger pressure comfort of trains intersecting in the tunnel

T Wang, Y Zhu, X Tian, F Shi, L Zhang, Y Lu - Building and Environment, 2022 - Elsevier
Dramatic pressure changes on train surfaces will propagate into carriages through train
gaps when two trains intersect in a tunnel, which impacts passenger pressure comfort and …

Active flow control using deep reinforcement learning with time delays in Markov decision process and autoregressive policy

Y Mao, S Zhong, H Yin - Physics of Fluids, 2022 - pubs.aip.org
Classical active flow control (AFC) methods based on solving the Navier–Stokes equations
are laborious and computationally intensive even with the use of reduced-order models …

Comparative investigations of pressure waves induced by trains passing through a tunnel with different speed modes

M Zhou, T Liu, Y Xia, W Li, Z Chen - Journal of Central South University, 2022 - Springer
Pressure waves induced by high-speed trains passing through a tunnel have adverse
effects on train structures and passenger comfort. These adverse effects can be alleviated …

Development of a forward design method for train airtightness: A case study of a metro express line

Y Li, Y Liu - Tunnelling and Underground Space Technology, 2024 - Elsevier
Focusing on metro express lines, this study develops a train airtightness forward design
method by deconstructing whole-vehicle pressure change and dynamic sealing index …

A study on the airtightness of a high-speed train using a reduced-scale method

Y Xia, X Chen, T Liu, M Zhou, H Gao - Measurement, 2022 - Elsevier
The pressure comfort of a high-speed train is closely related to the static and dynamic
airtightness performance of the train carriage, and this performance is studied mainly with …

Comparative research of the effect of the unilateral vertical slope at tunnel portals on aerodynamic performances of trains

Y Ma, T Liu, Y Xia, H Gao, B Xu, X Chen, Z Guo… - Journal of Wind …, 2024 - Elsevier
This study set out to explore the effect of a unilateral vertical slope terrain at tunnel portals on
the aerodynamic performances and operating stability of a train through a single-track …

Piecewise linear representation of pressure wave data of high-speed trains traveling through tunnels

Y Xia, T Liu, X Wang, Z Chen, B Xu, Z Guo… - Journal of Central South …, 2023 - Springer
Piecewise linear representation (PLR) techniques have been widely adopted to
recharacterize high-dimensionality time series data in numerous fields for purposes of …

Investigation of the dynamic airtightness coefficient of high-speed trains traveling through a tunnel: A field study

Y Xia, T Liu, X Chen, X Su, Z Chen, Z Guo… - Journal of Wind …, 2023 - Elsevier
Determining the dynamic airtightness coefficient (τ dyn) of train carriages using a high-
accuracy and high-efficiency method is essential regarding the study of the dynamic …

Assessing occupant ear comfort inside trains: Modeling of pressure variation using subjective feedback and real-time data monitoring

Y Lu, T Wang, L Dong, F Shi, D Gai, Z Lin - Building and Environment, 2025 - Elsevier
Ear pressure discomfort affected by pressure fluctuations inside train compartments has
been a significant concern for passengers. However, existing studies or regulations on …

Mitigating aerodynamic effects through segment length allocation of variable cross-section tunnels

W Li, Y Gu, T Liu, Y Deng, W Zhao, X Fan - Tunnelling and Underground …, 2025 - Elsevier
In constructing high-speed railway tunnels, reconciling excavation volume with aerodynamic
performance poses a fundamental challenge. The tunnel design with non-uniform cross …