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”.

scholarly journals Infrastructure costs and benefits of European high-speed rail

2021 ◽  
Vol 1 (2) ◽  
pp. 47-53
Author(s):  
Nedžad Branković ◽  
Aida Kalem
Keyword(s):  
High Speed ◽  
New Technologies ◽  
Operational Parameters ◽  
Negative Effects ◽  
Railway Network ◽  
High Speed Rail ◽  
Rail Network ◽  
High Speed Trains ◽  
Conventional Rail ◽  
Ecologically Sustainable

The development of new technologies has significantly influenced railways modernization and has caused the appearance of high-speed rail which represent a safe, comfortable and ecologically sustainable way of transportation. The high-speed rail present a big step in a relation to conventional railways, where the biggest difference is speed which even entails a change of other organizational and operational parameters, better utilization of trains, higher performance of manpower and better service to users.  That is visible in many cities around the world where high-speed trains are used by billions of users. In the EU there is no unique high-speed railway network, besides that in many EU member countries various operational models are applied. The future of the high-speed railways market depends on political, economical and technical factors and challenges as high infrastructure costs, various rates of return on investment and the negative effects of economic crises. The main objective of the paper is to analyze infrastucture costs of high-speed rail in Europe and benefits such us  time savings, higher reliability, comfort, safety, reducing pollution and the release of capacity in the conventional rail network, roads and airport infrastructure.

scholarly journals The Effect of Pendolino high-speed rail on the structure of buildings located in the proximity of railway tracks

2016 ◽  
Vol 21 (1) ◽  
pp. 231-238
Author(s):  
K. Grębowski ◽  
Z. Ulman
Keyword(s):  
Dynamic Analysis ◽  
High Speed ◽  
Building Structure ◽  
High Speed Train ◽  
High Speed Rail ◽  
Railway Tracks ◽  
High Speed Trains ◽  
Railway System ◽  
The Subject ◽  
The Impact

Abstract The following research focuses on the dynamic analysis of impact of the high-speed train induced vibrations on the structures located near railway tracks. The office complex chosen as the subject of calculations is located in the northern part of Poland, in Gdańsk, in the proximity of Pendolino, the high speed train route. The high speed trains are the response for the growing needs for a more efficient railway system. However, with a higher speed of the train, the railway induced vibrations might cause more harmful resonance in the structures of the nearby buildings. The damage severity depends on many factors such as the duration of said resonance and the presence of additional loads. The studies and analyses helped to determinate the method of evaluating the impact of railway induced vibrations on any building structure. The dynamic analysis presented in the research is an example of a method which allows an effective calculation of the impact of vibrations via SOFISTIK program.

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 Numerical Modeling and Investigation on Aerodynamic Noise Characteristics of Pantographs in High-Speed Trains

Complexity ◽  
2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Xiaoqi Sun ◽  
Han Xiao
Keyword(s):  
High Frequency ◽  
High Speed ◽  
Sound Pressure ◽  
Noise Source ◽  
Flow Fields ◽  
Aerodynamic Noise ◽  
Far Field ◽  
Frequency Bands ◽  
Noise Characteristics ◽  
High Speed Trains

Pantographs are important devices on high-speed trains. When a train runs at a high speed, concave and convex parts of the train cause serious airflow disturbances and result in flow separation, eddy shedding, and breakdown. A strong fluctuation pressure field will be caused and transformed into aerodynamic noises. When high-speed trains reach 300 km/h, aerodynamic noises become the main noise source. Aerodynamic noises of pantographs occupy a large proportion in far-field aerodynamic noises of the whole train. Therefore, the problem of aerodynamic noises for pantographs is outstanding among many aerodynamics problems. This paper applies Detached Eddy Simulation (DES) to conducting numerical simulations of flow fields around pantographs of high-speed trains which run in the open air. Time-domain characteristics, frequency-domain characteristics, and unsteady flow fields of aerodynamic noises for pantographs are obtained. The acoustic boundary element method is used to study noise radiation characteristics of pantographs. Results indicate that eddies with different rotation directions and different scales are in regions such as pantograph heads, hinge joints, bottom frames, and insulators, while larger eddies are on pantograph heads and bottom frames. These eddies affect fluctuation pressures of pantographs to form aerodynamic noise sources. Slide plates, pantograph heads, balance rods, insulators, bottom frames, and push rods are the main aerodynamic noise source of pantographs. Radiated energies of pantographs are mainly in mid-frequency and high-frequency bands. In high-frequency bands, the far-field aerodynamic noise of pantographs is mainly contributed by the pantograph head. Single-frequency noises are in the far-field aerodynamic noise of pantographs, where main frequencies are 293 Hz, 586 Hz, 880 Hz, and 1173 Hz. The farther the observed point is from the noise source, the faster the sound pressure attenuation will be. When the distance of two adjacent observed points is increased by double, the attenuation amplitude of sound pressure levels for pantographs is around 6.6 dB.

scholarly journals Annoyance Based Vibro-Acoustic Comfort Evaluation of as Summation of Stimuli Annoyance in the Context of Human Exposure to Noise and Vibration in Buildings

2020 ◽  
Vol 12 (23) ◽  
pp. 9876
Author(s):  
Krzysztof Nering ◽  
Alicja Kowalska-Koczwara ◽  
Krzysztof Stypuła
Keyword(s):  
High Speed ◽  
Residential Building ◽  
Railway Track ◽  
Simultaneous Occurrence ◽  
Noise And Vibration ◽  
Noise Current ◽  
Railway Line ◽  
High Speed Trains ◽  
Acoustic Comfort ◽  
The City

This paper presents the issues of assessing the comfort of people staying indoors who are exposed to vibrations and material noise caused by vibrations of partitions like floors and walls (ground-borne noise). Current criteria in the evaluation of vibrational and acoustic comfort cannot be assessed in the context of the simultaneous occurrence of stimuli such as noise and vibration. Railway transport, including passenger and cargo transport, is becoming increasingly prevalent, and new railway lines are being planned for environmental reasons. Sometimes, there are changes in stimuli produced by existing railway lines. For example, high-speed trains appear on an old railway track. Such a situation appeared on the Central Railway Line in Poland, which is still used by old trains, yet its operator plans to raise their speed limits. The analysis of the problem of the simultaneous occurrence of stimuli presented in this paper was based on measurements performed in a residential building located near the Central Railway Main Line in the city Zawiercie. Noise and vibration as the analyzed stimuli in both cases meet comfort requirements, yet when exposure to two stimuli was considered, comfort may be at risk.

California's “Fast-Track” to High-Speed Rail

2016 ◽  
pp. 15-32
Author(s):  
Rod Diridon Sr. ◽  
Ben Tripousis
Keyword(s):  
High Speed ◽  
Fast Track ◽  
State Funding ◽  
High Speed Rail ◽  
Public And Private ◽  
Private Partnership ◽  
The Past ◽  
The Us ◽  
High Speed Trains ◽  
Private Investors

For over 50 years, after both public and private studies confirmed California's need for high-speed rail, nothing happened. The rest of the US had a similarly disappointing experience when attempting to break into the rapidly growing family of nations with operating high-speed trains. Yet, over the past year, California has contracted over $2.5 billion in high-speed rail civil work, is preparing RFPs for three times that amount, and has secured commitments for nearly $25 billion in additional federal and state funding over the next 30 years. Private investors are lining up for the nation's first high-speed rail public-private partnership to complete this $68 billion, 540 mile project. This chapter describes the unprecedented technical excellence, political courage, and visionary voter support that created that high-speed rail breakthrough for California and the nation.

Динамическая коррекция чувствительности дефектоскопических каналов при высокоскоростном контроле рельсов

2021 ◽  
pp. 3-14
Author(s):  
А.А. Марков ◽  
Е.А. Максимова ◽  
А.Г. Антипов
Keyword(s):  
High Speed ◽  
Scanning Speed ◽  
Technical Documentation ◽  
Dynamic Adjustment ◽  
Current Sensitivity ◽  
High Speed Rail ◽  
Quality Of Control ◽  
High Speeds ◽  
Standard Design ◽  
Scanning Path

The article is aimed at increasing the reliability of high-speed ultrasonic monitoring of long-dimensional objects, in particular, railway rails. The technical documentation for the control does not take into account the features of high-speed rail monitoring, is focused on compliance with the initially set parameters and cannot provide the required reliability of defect detection. The factors that manifest themselves at high scanning speeds and negatively affect the quality of control are considered. Most of these factors cannot be quantified and accounted for in order to adjust the control parameters. An estimate of the number of undetected defects was made when working according to current documents. To ensure reliable control at high speeds, it is proposed to evaluate the current sensitivity of the control using signals from standard design reflectors of the controlled object. As such reflectors, when monitoring rails, it is proposed to use standard holes in the area of bolted joints that are regularly encountered along the scanning path. An expression is obtained for determining the value of the correction of the control sensitivity depending on the scanning speed and the measured size of the signals from the holes. An algorithm for dynamic adjustment of the parameters (sensitivity) of the control is proposed, which increases the reliability of detecting defects in high-speed scanning conditions.

Case Study: Predicted Effect of Station Design Changes on High Speed Train Noise

2002 ◽  
Vol 9 (4) ◽  
pp. 311-323 ◽  
Author(s):  
Chan-Hoon Haan
Keyword(s):  
High Speed ◽  
Effective Area ◽  
High Speed Train ◽  
Noise Levels ◽  
Noise Barriers ◽  
Railway Stations ◽  
Design Changes ◽  
Level Data ◽  
High Speed Trains ◽  
Main Station

The present study investigates the effects of design changes on high-speed train noise in railway stations. Noise barriers alongside the tracks and various absorptive materials applied to interior station surfaces are considered. TGV noise level data was used to predict the sound power levels of the high-speed trains. Computer simulations were used to predict noise levels on platforms during a high-speed train pass, and the expected noise reductions for various interior absorptive materials. It was found that a minimum barrier height of 1.8m, which is equivalent to the height from the rail floor to the bottom of the cabin window, is required to prevent noise diffraction. It was also found that any structures over the tracks could increase the noise levels up to 2.5dB in the platform area. The main station ceiling is the most effective area to control reverberation and improve the clarity of sound from broadcast systems.

scholarly journals Tourist tongues: High-speed rail carries linguistic and cultural urbanisation beyond the city limits in Guangxi, China

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
Alexandra Grey
Keyword(s):  
Social Distance ◽  
High Speed ◽  
Linguistic Features ◽  
High Speed Rail ◽  
Republic Of China ◽  
Mobile Capital ◽  
High Speed Trains ◽  
The City ◽  
Urban Places ◽  
Local Languages

AbstractThis article builds upon research which analyses the reconstruction of cities in China as an integral part of image-making discourses competing to attract mobile capital. It extends that literature beyond urban places to urbanisation processes, examining the material and linguistic features of networks and discourses of new high-speed rail infrastructure Guangxi, a poorer, rural, multilingual and multiethnic region of the People’s Republic of China (China) in which tourism – propelled by high-speed trains – has become a pillar of economic development. It argues that these trains produce symbolically powerful discourses which contribute to cultural urbanisation across Guangxi, emplacing urban norms outside city limits in pursuit of profitable sameness, as tourism does not trade only upon difference. Local multilingualism, specifically, is erased as too different, a barrier to tourists’ (and tourism capital’s) mobility. Amongst other ramifications, this reproduces social distance and ideologically displaces local languages.

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