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Các bài báo tiêu biểu
Active suspension in railway vehicles: a literature survey
- 2020
AbstractSince the concept of active suspensions appeared, its large possible
benefits has attracted continuous exploration in the field of railway
engineering. With new demands of higher speed, better ride comfort and lower
maintenance cost for railway vehicles, active suspensions are very promising
technologies. Being the starting point of commercial application of active
suspensions in rail vehi...
Wind tunnel measurement of aerodynamic characteristics of trains passing each other on a simply supported box girder bridge
Tập 29 - Trang 152-162 - 2021
The aerodynamic performance of high-speed trains passing each other was
investigated on a simply supported box girder bridge, with a span of 32 m, under
crosswinds. The bridge and train models, modeled at a geometric scale ratio of
1:30, were used to test the aerodynamic forces of the train, with the help of a
designed moving test rig in the XNJD-3 wind tunnel. The effects of wind speed,
train spe...
Damage tolerance of fractured rails on continuous welded rail track for high-speed railways
- 2021
AbstractBroken gap is an extremely dangerous state in the service of high-speed
rails, and the violent wheel–rail impact forces will be intensified when a
vehicle passes the gap at high speeds, which may cause a secondary fracture to
rail and threaten the running safety of the vehicle. To recognize the damage
tolerance of rail fracture length, the implicit–explicit sequential approach is
adopted t...
Quantitative detection of locomotive wheel polygonization under non-stationary conditions by adaptive chirp mode decomposition
Tập 30 Số 2 - Trang 129-147 - 2022
AbstractWheel polygonal wear is a common and severe defect, which seriously
threatens the running safety and reliability of a railway vehicle especially a
locomotive. Due to non-stationary running conditions (e.g., traction and
braking) of the locomotive, the passing frequencies of a polygonal wheel will
exhibit time-varying behaviors, which makes it too difficult to effectively
detect the wheel d...
A comprehensive review on coupling vibrations of train–bridge systems under external excitations
- 2022
AbstractIn recent years, high-speed railways in China have developed very
rapidly, and the number and span of the railway bridges are keeping increasing.
Meanwhile, frequent extreme disasters, such as strong winds, earthquakes and
floods, pose a significant threat to the safety of the train–bridge systems.
Therefore, it is of paramount importance to evaluate the safety and comfort of
trains when c...
Analysis of rail potential and stray current in MVDC railway electrification system
Tập 29 Số 4 - Trang 394-407 - 2021
AbstractIn contrast to the conventional direct current railway electrification
system (DC-RES), the medium voltage direct current (MVDC)-RES is considered
promising for long-distance high-speed corridors. In the MVDC-RES, traction
substations (TSSs) are placed much farther and train loads are much heavier than
in the conventional DC-RES. Hence, the MVDC-RES brings a drastic change in
catenary volt...
Aerodynamic characteristics of a high-speed train crossing the wake of a bridge tower from moving model experiments
- 2022
AbstractIn a strong crosswind, the wake of a bridge tower will lead to an abrupt
change of the aerodynamic forces acting on a vehicle passing through it, which
may result in problems related to the transportation safety. This study
investigates the transient aerodynamic characteristics of a high-speed train
moving in a truss girder bridge and passing by a bridge tower in a wind tunnel.
The scaled ...
Measured load spectra of the bearing in high-speed train gearbox under different gear meshing conditions
- 2023
AbstractThe load spectrum is a crucial factor for assessing the fatigue
reliability of in-service rolling element bearings in transmission systems. For
a bearing in a high-speed train gearbox, a measurement technique based on strain
detection of bearing outer ring was used to instrument the bearing and determine
the time histories of the distributed load in the bearing under different gear
meshing...
Traction power substation balance and losses estimation in AC railways using a power transfer device through Monte Carlo analysis
Tập 30 Số 1 - Trang 71-95 - 2022
AbstractThe high dynamic power requirements present in modern railway
transportation systems raise research challenges for an optimal operation of
railway electrification. This paper presents a Monte Carlo analysis on the
application of a power transfer device installed in the neutral zone and
exchanging active power between two sections. The main analyzed parameters are
the active power balance i...
Prediction of high-speed train delay propagation based on causal text information
Tập 31 Số 1 - Trang 89-106 - 2023
AbstractThe delay-causing text data contain valuable information such as the
specific reasons for the delay, location and time of the disturbance, which can
provide an efficient support for the prediction of train delays and improve the
guidance of train control efficiency. Based on the train operation data and
delay-causing data of the Wuhan–Guangzhou high-speed railway, the relevant
algorithms i...