On interaction of a rolling stock and geometrical parametres of high-speed networks’ route

2017 ◽  
pp. 96-104
Author(s):  
Sergey Shkurnikov ◽  
Olga Morozova
Keyword(s):  
Dynamic Behavior ◽  
Simulation Modeling ◽  
High Speed ◽  
Practical Importance ◽  
Railway Vehicle ◽  
High Speed Train ◽  
Software Application ◽  
Speed Up ◽  
Passenger Trains ◽  
Universal Mechanism

Objective: Due to the lack of global experience of holding on one track high-speed passenger trains (moving at a speed up to 400 km/h), high-speed passenger trains (moving at a speed up to 250 km/h) and special freight trains (accelerating to a speed of more than 200 km/h), the only possible way of studying the influence of a train on a track is computer simulation modeling. The analysis of the existing computer programs was carried out and the most effective programme for the solution of combined train movement was selected. Methods: Simulation modeling was applied. On the basis of the obtained model the possibility of “Universal mechanism” software practical application was considered. Results: A test simulation model of a high-speed train carriage was developed in “Universal mechanism” software application. Preliminary results showed the possibility of its usage for the study of a high-speed train and track interaction. Practical importance: Modern computer technologies make it possible to solve the tasks of dynamic interaction with a high degree of accuracy. Among the variety of software used for the study of dynamic behavior of a railway vehicle in Russia, “Universal mechanism” software application is of wide popularity and may be used for the study of dynamic behavior of different types of trains on railway tracks of different plans and profiles.

A Study on the Method of Vibration Analysis for Korean High Speed Train by the On-Line Test

2006 ◽  
Vol 321-323 ◽  
pp. 1593-1596 ◽  
Author(s):  
Chan Kyoung Park ◽  
Ki Whan Kim ◽  
Jin Yong Mok ◽  
Young Guk Kim ◽  
Seog Won Kim
Keyword(s):  
Vibration Analysis ◽  
High Speed ◽  
Vibration Mode ◽  
Dynamic Performance ◽  
Railway Vehicle ◽  
High Speed Train ◽  
Acceleration Data ◽  
On Line ◽  
System Vibration ◽  
Line Test

The Korean High Speed Train (KHST) has been tested on the Kyongbu high speed line and the Honam conventional line since 2002. A data acquisition system was developed to test and prove the dynamic performance of the KHST, and the system has been found to be very efficient in acquiring multi-channel data from accelerometers located all over the train. Also presented in this paper is an analysis procedure which is simple and efficient in analyzing the acceleration data acquired during the on-line test of the KHST. The understanding of system vibration mode for a railway vehicle is essential to evaluate the characteristics of a dynamic system and to diagnose the dynamic problems of the vehicle system during tests and operations. Methods based on homogeneous linear systems are not realistic because real systems have nonlinear characteristics and are strongly dependent on environmental conditions. In this paper an efficient method of vibration analysis has been proposed and applied for the KHST to evaluate its vibration mode characteristics. The results show that this method is suitable to estimate the system vibration modes of the KHST.

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.

Dynamic behavior of two-span continuous concrete bridges under moving high-speed train

2004 ◽  
Vol 82 (4-5) ◽  
pp. 463-474 ◽  
Author(s):  
J.W. Kwark ◽  
E.S. Choi ◽  
Y.J. Kim ◽  
B.S. Kim ◽  
S.I. Kim
Keyword(s):  
Dynamic Behavior ◽  
High Speed ◽  
Concrete Bridges ◽  
High Speed Train

scholarly journals Simulation Analysis of a Multiple-Vehicle, High-Speed Train Collision Using a Simplified Model

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Suchao Xie ◽  
Weilin Yang ◽  
Ping Xu
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
High Speed ◽  
Large Scale ◽  
Computing Time ◽  
Element Model ◽  
Vehicle Body ◽  
Railway Vehicle ◽  
Storage Space ◽  
High Speed Train

To solve the problems associated with multiple-vehicle simulations of railway vehicles including large scale modelling, long computing time, low analysis efficiency, need for high performance computing, and large storage space, the middle part of the train where no plastic deformation occurs in the vehicle body was simplified using mass and beam elements. Comparative analysis of the collisions between a single railway vehicle (including head and intermediate vehicles before, and after, simplification) and a rigid wall showed that variations in impact kinetic energy, internal energy, and impact force (after simplification) are consistent with those of the unsimplified model. Meanwhile, the finite element model of a whole high-speed train was assembled based on the simplified single-vehicle model. The numbers of nodes and elements in the simplified finite element model of the whole train were 63.4% and 61.6%, respectively, compared to those of the unsimplified model. The simplified whole train model using the above method was more accurate than the multibody model. In comparison to the full-size finite element model, it is more specific, had more rapid computational speed, and saved a large amount of computational power and storage space. Finally, the velocity and acceleration data for every car were discussed through the analysis of the collision between two simplified trains at various speeds.

Improved nonlinear model of a yaw damper for simulating the dynamics of a high-speed train

2018 ◽  
Vol 233 (7) ◽  
pp. 651-665 ◽  
Author(s):  
Wanxiu Teng ◽  
Huailong Shi ◽  
Ren Luo ◽  
Jing Zeng ◽  
Caihong Huang
Keyword(s):  
Nonlinear Model ◽  
High Speed ◽  
Piecewise Linear ◽  
Excitation Frequency ◽  
Maxwell Model ◽  
Railway Vehicle ◽  
High Speed Train ◽  
Force Velocity ◽  
Linear Force ◽  
Force Displacement

The aim of this paper is to establish a simple and accurate nonlinear model of a yaw damper for the dynamic numerical simulation of high-speed trains. An improved nonlinear yaw damper model is proposed based on the traditional Maxwell model. It comprises a piecewise linear force–displacement spring and a piecewise linear force–velocity damper in series. These nonlinear inputs for the model are retrieved from the dynamic performance tests of the damper, and the force–displacement and force–velocity curves are further modified to improve the modelling accuracy according to the test results. The proposed model can accurately simulate the damper's dynamic stiffness and dynamic damping characteristics with respect to the excitation frequency or displacement, which cannot be reproduced when using the traditional Maxwell model. Both the traditional Maxwell model and the improved nonlinear model presented in this work are integrated into a multibody dynamics railway vehicle model to simulate the typical dynamic problems of a high-speed train operating at 250 km/h in northeast China. Through comparative analysis, it was found that the numerical simulations are consistent with the field measurements. It can be concluded that the proposed nonlinear damper model is more suitable for studying railway vehicle system dynamics under various operating cases. By contrast, the input parameters of the traditional Maxwell model must be modified artificially according to the vehicle responses and the dynamic characteristics of the yaw damper.

A study on the dynamic behavior of the Korean next-generation high-speed train

2015 ◽  
Vol 230 (4) ◽  
pp. 1053-1065 ◽  
Author(s):  
Chang-Sung Jeon ◽  
Young-Guk Kim ◽  
Joon-Hyuk Park ◽  
Seog-Won Kim ◽  
Tae-Won Park
Keyword(s):  
Dynamic Behavior ◽  
High Speed ◽  
High Speed Train ◽  
Next Generation

Formulation of Reliability-Based Fatigue Assessment of a Car Body for a High Speed Train Passing Through Tunnels

2006 ◽  
Vol 321-323 ◽  
pp. 1530-1534 ◽  
Author(s):  
Choo Soo Park ◽  
Sung Il Seo ◽  
Sung Hoon Choi ◽  
Jin Yong Mok
Keyword(s):  
High Speed ◽  
Structural Reliability ◽  
Transfer Functions ◽  
Vehicle Body ◽  
Railway Vehicle ◽  
Distribution Characteristics ◽  
High Speed Train ◽  
Fatigue Reliability ◽  
Car Body ◽  
System Pressure

In designing the structures of railway rolling stocks, deterministic methods associated with the concept of a safety factor have been traditionally used. The deterministic approaches based on the mean values of applied loads and material properties have been used as safety verification for the design of the car body structures. The uncertainties in the applied loading for the high speed train and the strength of new materials in the structure require the application of probabilistic approaches to ensure fatigue safety in the desired system. Pressure loadings acting on the car body when the train passes through tunnels show reflected pressure waves for high-speed trains and they may cause a fatigue failure in vehicle bodies. In this paper, it is proposed that a fatigue design and assessment method based on a structural reliability that deals with the loading of pressure variations on a railway vehicle reflected in tunnels and the strength variations of material. Equation for the fatigue reliability index has been formulated to calculate the reliability assessment of a vehicle body under fluctuating pressure loadings in a tunnel. Considered in this formulation are the pressure distribution characteristics, the fatigue strength distribution characteristics, and the concept of stress-transfer functions due to the pressure loading.

scholarly journals RESEARCH DIRECTIONS THE DEVELOPMENT OF SPEED AND HIGH-SPEED PASSENGER TRAINS ON RAILWAYS UKRAINE

2014 ◽  
Author(s):  
Larisa Parkhomenko
Keyword(s):  
High Speed ◽  
Railway Network ◽  
High Speed Rail ◽  
Passenger Traffic ◽  
Passenger Transportation ◽  
Partial Interaction ◽  
Normal Speed ◽  
Speed Up ◽  
Passenger Trains ◽  
Railway Passenger

This paper analyzes the trends of high-speed and high-speed passenger trains on the railways of Ukraine on the basis of market research and analysis of passenger traffic plying the effectiveness of conventional and high-speed passenger trains within the existing operating model railroad network. The analysis of changes in the competitiveness of rail transport in the passenger transportation market in the implementation of high-speed and high-speed rail passenger traffic. This paper analyzes the effectiveness of most profitable running of passenger trains normal speed (speed up to 120 km/h ) and passenger trains new Hyundai and Skoda (speed up to 160 km/h), which began to run from 2012 on the railway network inUkraine. We prove the efficiency of high-speed railway passenger transportation to Ukraine on the basis of an extensive network of specialized upgraded lines on which trains are capable of speeds up to 180 km/hwith the possibility of partial interaction with conventional network.

scholarly journals Vibration and Stress Response of High-Speed Train Gearboxes under Different Excitations

2022 ◽  
Vol 12 (2) ◽  
pp. 712
Author(s):  
Wangang Zhu ◽  
Wei Sun ◽  
Hao Wu
Keyword(s):  
High Speed ◽  
Dynamic Stress ◽  
Coupling Model ◽  
Transmission Model ◽  
Railway Vehicle ◽  
Time Varying ◽  
High Speed Train ◽  
Dynamic Stresses ◽  
Vibration Data ◽  
Polygonal Wear

The vibration data of the gearbox on a high-speed train was measured, and the vibration characteristics were analyzed in this paper. The dynamic stress of the gearbox under the internal and external excitation was examined by a railway vehicle dynamic model with a flexible gearbox and a flexible wheelset. The ideal 20th polygonal wear was considered, and dynamic stresses of the gearbox under different polygonal wear amplitudes were calculated. The gear transmission model was established to study the dynamic stress of the gearbox under the influence of the time-varying stiffness of the gear meshing. Based on the rigid–flexible coupling model, and considering the influence of wheel polygonization, gear meshing time-varying stiffness, and wheelset elastic deformation, the dynamic stress of the gearbox was investigated with consideration of the measured polygonal wear and measured rail excitation. The results show that the dynamic stress of the gearbox is dominated by the wheel polygonization. Moreover, not only the wheel polygonization excites the resonance of the gearbox, but also the flexible deformation of the wheelset leads to the deformation of the gearbox, which also increases the dynamic stress of the gearbox. Within the resonant bandwidth of the frequency, the amplitude of the dynamic stresses in the gearbox will increase considerably compared with the normal case.

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