scholarly journals Vibrations of Bridge / Track Structure / High-speed Train System with Vertical Irregularities of the Railway Track

2014 ◽  
Vol 91 ◽  
pp. 148-153 ◽  
Author(s):  
M. Podworna
Keyword(s):  
High Speed ◽  
Railway Track ◽  
Track Structure ◽  
High Speed Train ◽  
Train System

scholarly journals Effect of random track irregularities on selected composite bridge / track structure / high-speed train system vibrations

2013 ◽  
Vol 12 (1) ◽  
pp. 259-266
Author(s):  
Monika Podworna ◽  
Marian Klasztorny
Keyword(s):  
High Speed ◽  
Contact Stiffness ◽  
Track Structure ◽  
Computer Algorithms ◽  
High Speed Train ◽  
Approach Slabs ◽  
Composite Bridge ◽  
Random Track Irregularities ◽  
Train System ◽  
Track Irregularities

A theory of the quasi-exact physical and mathematical modelling of the composite (steel–concrete) bridge / ballasted track structure / high-speed train system (BTT) was developed, including viscoelastic suspensions of rail-vehicles on two-axle bogies, the non-linear Hertz contact stiffness and one-sided contact between the wheel sets and the rails, the viscoelastic and inertia features of the bridge, the viscoelastic track structure on and beyond the bridge, the approach slabs, and random track irregularities. Based on this theory, advanced computer algorithms for the BTT numerical modelling were written and a computer program to simulate the vertical vibrations of the BTT systems was developed. The bridge subject to the preliminary dynamic analysis and designed according to Polish standards has a 15.00 m span length. The bridge was loaded by the German ICE-3 high-speed train moving at the critical (180 and 270 km/h) and the maximum (300 km/h) operating speeds.

scholarly journals Deformation Law and Control Limit of CRTSIII Slab Track under Subgrade Frost Heave

2021 ◽  
Vol 11 (8) ◽  
pp. 3520
Author(s):  
Xiaopei Cai ◽  
Qian Zhang ◽  
Yanrong Zhang ◽  
Qihao Wang ◽  
Bicheng Luo ◽  
...  
Keyword(s):  
High Speed ◽  
Base Plate ◽  
Element Model ◽  
Middle Part ◽  
Railway Track ◽  
Frost Heave ◽  
Track Structure ◽  
Slab Track ◽  
Plastic Damage ◽  
Track Irregularity

In order to find out the influence of subgrade frost heave on the deformation of track structure and track irregularity of high-speed railways, a nonlinear damage finite element model for China Railway Track System III (CRTSIII) slab track subgrade was established based on the constitutive theory of concrete plastic damage. The analysis of track structure deformation under different subgrade frost heave conditions was focused on, and amplitude the limit of subgrade frost heave was put forward according to the characteristics of interlayer seams. This work is expected to provide guidance for design and construction. Subgrade frost heave was found to cause cosine-type irregularities of rails and the interlayer seams in the track structure, and the displacement in lower foundation mapping to rail surfaces increased. When frost heave occured in the middle part of the track slab, it caused the greatest amount of track irregularity, resulting in a longer and higher seam. Along with the increase in frost heave amplitude, the length of the seam increased linearly whilst its height increased nonlinearly. When the frost heave amplitude reached 35 mm, cracks appeared along the transverse direction of the upper concrete surface on the base plate due to plastic damage; consequently, the base plate started to bend, which reduced interlayer seams. Based on the critical value of track structures’ interlayer seams under different frost heave conditions, four control limits of subgrade frost heave at different levels of frost heave amplitude/wavelength were obtained.

scholarly journals A Review of Different Aspects of Applying Asphalt and Bituminous Mixes under a Railway Track

Materials ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 169
Author(s):  
Kazem Jadidi ◽  
Morteza Esmaeili ◽  
Mehdi Kalantari ◽  
Mehdi Khalili ◽  
Moses Karakouzian
Keyword(s):  
High Speed ◽  
Review Paper ◽  
Railway Track ◽  
High Speed Train ◽  
Slab Track ◽  
Bituminous Mixtures ◽  
Railway Tracks ◽  
Potential Applications ◽  
Heavy Loads ◽  
Design And Construction

Asphalt is a common material that is used extensively for roadways. Furthermore, bituminous mixes have been used in railways, both as asphalt and as mortar. Different agencies and research institutes have investigated and suggested various applications. These studies indicate the benefits of bituminous material under railways, such as improving a substructure’s stiffness and bearing capacity; enhancing its dynamic characteristics and response, especially under high-speed train loads; waterproofing the subgrade; protecting the top layers against fine contamination. These potential applications can improve the overall track structure performance and lead to minimizing settlement under heavy loads. They can also guarantee an appropriate response under high-speed loads, especially in comparison to a rigid slab track. This review paper documents the literature related to the utilization of asphalt and bituminous mixes in railway tracks. This paper presents a critical review of the research in the application of asphalt and bituminous mixes in railway tracks. Additionally, this paper reviews the design and construction recommendations and procedures for asphalt and bituminous mixes in railway tracks as practiced in different countries. This paper also provides case studies of projects where asphalt and bituminous mixes have been utilized in railway tracks. It is anticipated that this review paper will facilitate (1) the exchange of ideas and innovations in the area of the design and construction of railway tracks and (2) the development of unified standards for the design and construction of railway tracks with asphalt and bituminous mixtures.

Harvesting Wind Energy by a Triboelectric Nanogenerator for an Intelligent High-Speed Train System

2021 ◽  
pp. 1490-1499
Author(s):  
Chuguo Zhang ◽  
Yuebo Liu ◽  
Baofeng Zhang ◽  
Ou Yang ◽  
Wei Yuan ◽  
...  
Keyword(s):  
Wind Energy ◽  
High Speed ◽  
Triboelectric Nanogenerator ◽  
High Speed Train ◽  
Train System

Cost–Benefit Analysis of Investment in High-Speed Train System in Spain

2006 ◽  
Vol 1960 (1) ◽  
pp. 135-141 ◽  
Author(s):  
Gema Carrera-Gómez ◽  
Juan Castanedo-Galán ◽  
Pablo Coto-Millán ◽  
Vicente Inglada ◽  
Miguel Angel Pesquera
Keyword(s):  
High Speed ◽  
Cost Benefit Analysis ◽  
Cost Benefit ◽  
Benefit Analysis ◽  
High Speed Train ◽  
Train System

scholarly journals Dynamic Interaction of the “Bridge-Train” System on High-Speed Railways

2020 ◽  
Vol 157 ◽  
pp. 06015
Author(s):  
Leonid Diachenko ◽  
Vladimir Smirnov
Keyword(s):  
Numerical Model ◽  
High Speed ◽  
Natural Frequencies ◽  
Dynamic Interaction ◽  
Dynamic Processes ◽  
Bridge Structure ◽  
High Speed Train ◽  
Key Factor ◽  
Passenger Trains ◽  
Train System

This work contains the results of a research of the dynamic processes in the “bridge-train” system while passenger trains move over a bridge structure (overpass) in high-speed. The article presents the methodology of mathematic modelling, and the basic differential equations of the studied system elements motion are provided. Also there is a description of dynamic interaction of the bridge-train system numerical model based on the FEM. In general, taking into account in the design scheme of the “bridge” system not only spans, but also piers with a foundation, it is possible to more accurately determine the values of the bridge natural frequencies, which is a key factor in assessing the dynamic response of a structure when passing a high-speed train.

Vibration Analysis of Vehicle-Rail System under the Condition of Track Stiffness Irregularity

2013 ◽  
Vol 368-370 ◽  
pp. 1431-1437 ◽  
Author(s):  
Tian Yu Lu ◽  
Zu Jun Yu ◽  
Hong Mei Shi
Keyword(s):  
Frequency Spectrum ◽  
Vibration Frequency ◽  
Vibration Analysis ◽  
High Speed ◽  
Track Structure ◽  
High Speed Train ◽  
Track Maintenance ◽  
Rail System ◽  
Coupling System ◽  
Track Stiffness

The interaction of track structure and high-speed train has greater impact on safe and steady running of the trains. This paper obtained acceleration and frequency spectrum of the train's running vibration in the case of sleeper’s spacing and continuous failure， and continuous and spacing loose tie by establishing the vertical model of vehicle-track coupling system, and analyzed the sleeper failure and loose tie which has a greater impact on the 40-80 Hz vibration frequency of the train, which provided a basis for track maintenance.

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