Vibrations’ formation and transmission during high-speed trains’ operation

2017 ◽  
pp. 89-95
Author(s):  
Tamila Tytova ◽  
Aleksander Shashuryn ◽  
Konstantin Buzhynskiy ◽  
Valeriy Svetlov
Keyword(s):  
Calculation Method ◽  
High Speed ◽  
Practical Importance ◽  
Experimental Studies ◽  
Wave Impedance ◽  
Internal Loss ◽  
Vibration Attenuation ◽  
High Speed Trains ◽  
Vibration Wave ◽  
The Given

Objective: To determine the mechanisms of vibration’s occurrence and transmission during high-speed trains’ operation. Methods: The occurrence and transmission of vibration is calculated by means of vibration attenuation calculation method, which results from the extension of the vibration wave front in space, ground internal loss and elastic medium wave impedance. Results: Theoretical studies were generally confirmed by the results of experimental studies. Practical importance: Application of the given calculation method of vibration dumping in the early stages of high-speed railway lines construction, in order to predict the level of vibrations and select the means of level protection.

Calculation method of dynamic loads spectrum and effects on fatigue damage of a full-scale carbody for high-speed trains

2019 ◽  
Vol 58 (7) ◽  
pp. 1037-1056 ◽  
Author(s):  
Yaohui Lu ◽  
Wei Bi ◽  
Xing Zhang ◽  
Jing Zeng ◽  
Tianli Chen ◽  
...  
Keyword(s):  
Fatigue Damage ◽  
Calculation Method ◽  
High Speed ◽  
Full Scale ◽  
Dynamic Loads ◽  
High Speed Trains

On prospects for the development of high-speed railway lines in Russia

2017 ◽  
pp. 7-14
Author(s):  
Nikolay Bushuyev ◽  
Darina Shulman
Keyword(s):  
Russian Federation ◽  
High Speed ◽  
Network Formation ◽  
Practical Importance ◽  
High Speed Railway ◽  
Complex Approach ◽  
Study Results ◽  
High Speed Trains ◽  
The Russian Federation ◽  
Traffic Organization

Objective: To consider the prospects for the development of high-speed railway lines (VSM) in Russia. To analyze the fundamentals of “Updated program of high-speed railway communication on the territory of the Russian Federation” approved on November, 23rd 2015 by the decision of OAO “RZhD” board meeting and the social board on the issues of high-speed railway communication in Russia. To formulate the specificities of high-speed traffic organization: promising directions of high-speed headings realization before 2030, as well as the stages of their implementation in Russia. Methods: Multiple regression analysis, as well as the method of multi criterial decisions optimization was applied in the study. Results: The analysis of current and perspective headings was carried out, as well as such characteristics as speed and the running time of “Sapsan” high-speed trains and “Allegro”, “Strizh”, “Lastochka” rapid trains. Special attention was paid to the comparison of strategies given in “Updated program of high-speed railway communication on the territory of the Russian Federation” with the main scientific findings stated in VSM network formation part, obtained on the basis of complex approach to the solution of justification of VSM network formation stage-by-stage approach, taking into account multi criterial estimation of cities and regions’ potential and application of mathematical traffic flow model approach as part of basic regional socioeconomic indices of cities and regions, situated in the zones attractive for future VSM construction. Practical importance: The conclusion was made on the necessity to continue exploratory development in the sphere of topology specification research and stage-by-stage formation of the first VSM in Russia.

scholarly journals Existence of solution to transpiration control problem

1992 ◽  
Vol 5 (4) ◽  
pp. 339-361 ◽  
Author(s):  
Guanstian Zhu ◽  
Jingang Wu ◽  
Benzhong Liang ◽  
Xinhua Ji ◽  
Xueshi Yang
Keyword(s):  
Numerical Calculation ◽  
Control Problem ◽  
High Speed ◽  
Practical Importance ◽  
Existence Of Solution ◽  
Dynamic Responses ◽  
Control Parameters ◽  
Mathematical Equations ◽  
The Given ◽  
High Speed Vehicle

Transpiration control can avoid change of the shape of a high-speed vehicle resulting from ablation of the nose, therefore also can avoid the change of the performance of Aerodynamics. Hence it is of practical importance. A set of mathematical equations and their boundary conditions are founded and justified by an example of non-ablation calculation in reference [1]. In [2], the ablation model is studied by the method of finite differences, the applicable margin of the equations is estimated through numerical calculation, and the dynamic responses of control parameters are analyzed numerically. In this paper we prove that the solution to transpiration control problem given in [1] exists uniquely under the assumption that the given conditions (i.e. given functions) are continuous.

Psychoacoustic Properties Analysis on Interior Noise of High-Speed Trains

2013 ◽  
Vol 712-715 ◽  
pp. 2865-2869
Author(s):  
Li Fang Yang ◽  
Fan Yu Meng ◽  
Bo Kang
Keyword(s):  
Calculation Method ◽  
High Speed ◽  
Interior Noise ◽  
High Speed Train ◽  
High Speed Trains ◽  
Noise Evaluation ◽  
And Control

In order to analyze the noise properties and promote the sound comfort of the high-speed train, the noise samples are collected in passengers cars, dining cars and car joint parts at different speeds. By means of 18 sound samples, the psychoacoustic parameters of the high-speed train are discussed. Before calculation of other psychoacoustic properties, the calculation method of loudness must be properly chosen through analysis of all loudness calculation method. In the paper, the Filter/ISO 532B method is selected to obtain the loudness of the high-speed train and based on the loudness; other psychoacoustic properties are obtained and analyzed. The discussion of psychoacoustic properties is the basis of further noise evaluation and control of high-speed trains.

Numerical Simulations of Vibration Attenuation of High-Speed Train Foundations With Varied Trackbed Underlayment Materials

2004 ◽  
Vol 10 (8) ◽  
pp. 1123-1136 ◽  
Author(s):  
Judith Wang ◽  
Xiangwu Zeng
Keyword(s):  
Dynamic Loading ◽  
High Speed ◽  
Relative Effectiveness ◽  
Ground Vibration ◽  
High Speed Train ◽  
Vibration Attenuation ◽  
High Speed Trains ◽  
Alternative Means ◽  
Parametric Studies ◽  
Materials Used

Interest in high-speed railway as an alternative means of transportation is steadily increasing around the world. However, high-speed trains come with the concern of track vibration and induced noise and ground vibration. Excessive track vibration can cause damage to trains and tracks and reduce riding comfort for passengers. Ground vibration induced by passing trains can also damage and disturb surrounding infrastructure (especially structures housing precision machines or instruments) and residents. One potential solution toward minimizing these vibrations is the use of rubber-modified asphalt concrete (RMAC) as a material for high-speed train trackbed underlayments. In this paper we present the results of a finite element simulation of a high-speed train foundation. The simulated foundation was subjected to dynamic loading in several test scenarios, with RMAC and other traditional paving materials used as trackbed underlayment materials. The ground accelerations at designated points in these simulations were then monitored and compared with one another to determine the relative effectiveness in vibration attenuation. From these parametric studies, RMAC proves to be more effective than currently used paving materials in damping out vibrations from dynamic loading. Implications for field applications are also discussed.

scholarly journals Dynamic experimental studies of A6N01S-T5 aluminum alloy material and structure for high-speed trains

2019 ◽  
Vol 35 (4) ◽  
pp. 763-772 ◽  
Author(s):  
Zishang Liu ◽  
Yangyang Yu ◽  
Zhe Yang ◽  
Yanpeng Wei ◽  
Junshuang Cai ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
High Speed ◽  
Experimental Studies ◽  
Alloy Material ◽  
High Speed Trains

scholarly journals Dynamic Analysis of Historic Railway Bridges in Poland in the Context of Adjusting Them to Pendolino Trains

2015 ◽  
Vol 20 (2) ◽  
pp. 283-297 ◽  
Author(s):  
K. Grębowski ◽  
M. Zielińska
Keyword(s):  
Dynamic Analysis ◽  
Dynamic Model ◽  
High Speed ◽  
Experimental Studies ◽  
Rolling Stock ◽  
Railway Bridge ◽  
High Speed Train ◽  
Railway Bridges ◽  
High Speed Trains ◽  
Identical Type

Abstract The article presents the dynamic analysis of the historic railway bridge in Tczew as an example of the usefulness of such type of bridge for high-speed trains. The model of the bridge and the simulation of rolling stock passage was performed in SOFISTIK program. The scope of work includes experimental studies, the solution of the problem concerning the correct solution features of the dynamic model which takes into account the dependencies between the bridge, track and rolling - stock (RBT). The verification of the model was performed by comparing the results obtained on site during the passage of ET-22 locomotive and twenty (20) open goods wagons with the results obtained in the program for the identical type of rolling stock used to the simulation Pendolino train. Then, after the verification, the simulation of high-speed train passage was performed. The speed of the train passage varied from 150 [km/h] to the max. possible speed of 250 [km/h] which PENDOLINO train, approved for the simulation, may reach. Under the analysis of obtained results it was possible to define the conditions for adjusting the historic bridge to high-speed train passage.

scholarly journals Discussing the effect of the wheelset equivalent conicity on the stress-strain state of the rails

2021 ◽  
Vol 2021 (2) ◽  
pp. 261-272
Author(s):  
Lyudmila S. BLAZHKO ◽  
◽  
Artem A. KISELEV ◽  
Igor P. KISELEV ◽  
Andrey V. ROMANOV ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Field Experiment ◽  
High Speed ◽  
Strain State ◽  
Practical Importance ◽  
Experimental Studies ◽  
Resistance Force ◽  
Stress Strain ◽  
Stress Strain State ◽  
Equivalent Conicity

Objective: To assess the effect of the wheelset equivalent conicity on the stress-strain state of the rails. Methods: Authors used numerical integration methods for systems of nonlinear differential equations of motion in the Universal Mechanism software package. Experimental studies were carried out on the St. Petersburg – Moscow high-speed line using a multichannel strain-gauge station. Methods of mathematical statistics have been used to process the results of numerical simulation and field experiment. Results: The stresses and strains in the wheel-rail contact area and their dependence on the wheelset equivalent conicity have been determined. According to numerical simulation and field experiment, the convergence was within 15 %. Practical importance: The need for updating the standards for the maintenance of a rail track on high-speed lines has been revealed. Allowing for the wheelset equivalent conicity decreases the risk of intense hunting oscillation, which would reduce the dynamic wheel–rail effect. Mobile treatment of rails on the way makes it possible to extend the safe operation time and reduce the rolling stock motion resistance force of the track.

Equivalent conicity and its influence on rolling-stock operation

2017 ◽  
pp. 247-255
Author(s):  
Artem Kyselev ◽  
Lyudmila Blazhko ◽  
Andrey Romanov
Keyword(s):  
High Speed ◽  
Practical Importance ◽  
Railway Track ◽  
Rolling Stock ◽  
Functional Dependencies ◽  
Wheel Pair ◽  
Wheel Rolling ◽  
High Speed Trains ◽  
Force Reduction ◽  
Equivalent Conicity

Objective: To identify the rolling-stock stability, force reduction, emerging in the process of wheel-rail interaction, the reduction of wheel thread and wheel flange wear, horizontal wear during high-speed running. To consider issues of wheel-rail interaction, that is the influence of a wheel pair equivalent conicity on rolling stock operation. Lateral motion of a wheel pair about an axis of a track in accordance with conicity parameters occurs in the process of standard tapered wheel-rail interaction. Methods: Calculation methods of equivalent conicity and basic assumptions in design diagram were presented. The main functional dependencies of equivalent conicity were determined. “All-purpose mechanism” bundled software, developed on the basis of FastSim algorithm introduced by G. Kalker, was applied for modeling of wheel pair operation on a railway track. Results: Interaction of VNIIZhT-RM-70 wheel for “Sapsan” high-speed trains with R65 rail type was studied, as well as UIC60 rail type used on European railroads. Wheel rolling occurs in different circumferential directions in case of lateral movement of a wheel pair Oscillating motion was described, as well as the parameters on the basis of which equivalent conicity is formed. Practical importance: The necessity in reduction of equivalent conicity to efficiency parameters of high-speed running realization on Russian railroads was revealed by means of modeling.

Forecasting high-speed trains’ noise levels

2017 ◽  
pp. 82-88
Author(s):  
Tamila Tytova ◽  
Nikolay Ivanov ◽  
Aleksander Shashuryn ◽  
Yulia Boiko
Keyword(s):  
High Speed ◽  
Practical Importance ◽  
Current Collector ◽  
Technical Documentation ◽  
Noise Levels ◽  
High Speed Rail ◽  
Noise Current ◽  
Noise Characteristics ◽  
High Speed Trains ◽  
Normative Documentation

Objective: The data on normative documentation in the sphere of high-speed running, developed by the authors, was presented in the article. Methods: Calculation formulas of noise characteristics of trains at 3,5 m height, as well as certain sources of train noise (current collector, frame and forebody of a train). The main methods and means of high-speed rail lines’ noise reduction. Results: The normative and technical documentation developed by the authors of the article is the first and unique operating standard in Russia, regulating VSM noise calculation methods. Practical importance: The derived formulas make it possible to perform predictive estimate of high-speed rail lines’ noise levels, including the first Russian VSM “Moscow-Kazan”.

Sign in / Sign up

Export Citation Format

Share Document