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Wyszukujesz frazę "railway wheels" wg kryterium: Temat

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    Wyświetlanie 1-7 z 7
    Tytuł:
    Dynamics of wheel-tyre subjected to moving oscillating force
    Autorzy:
    Bogacz, R.
    Kocjan, M.
    Kurnik, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/1986961.pdf
    Data publikacji:
    2002
    Wydawca:
    Politechnika Gdańska
    Tematy:
    railway vehicles
    waves
    oscillating force
    railway wheels
    Opis:
    The subject of the paper is analysis of wheel of a moving railway vehicle which is subjected to a moving oscillating force. Rail ring is treated as a beam of small curvature connected to wheel axle with a Winkler foundation. Bernoulli-Euler and Timoshenko beam model is used. Results are gained using Fourier transformation. Space and space-time graphs, showing wave propagation in subcritical and supercritical zones of excitation, concerning resonance of transverse vibrations, are included.
    Źródło:
    TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2002, 6, 3; 343-350
    1428-6394
    Pojawia się w:
    TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of nonmetallic inclusions on microbreaks formation in wheel steel and railway wheels
    Wpływ wtrąceń niemetalowych na powstanie mikropęknieć w stalach kołowych i kołach kolejowych
    Autorzy:
    Gubenko, S.
    Proidak, Y.
    Kozlovsk'yy, A.
    Shramko, O.
    Is'kov, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/374679.pdf
    Data publikacji:
    2008
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    koło kolejowe
    mikropęknięcia
    railway wheels
    microbreaks
    Opis:
    It is well known that formation of defects of many types during railway wheels service somehow or other is connected to nonmetallic inclusions in wheel steel. Microbreakes connected with nonmetallic inclusions have different origin. The first one is "deformational", the second is "thermal" and the third is "hydrogenous". The objective of this work is the study of nature of microbreaking in wheel steel relative to nonmetallics. Mechanisms of microbreaking of all types near different nonmetallics had been investigated and their influence on safety threshold of railway wheels had been analyzed herein.
    Źródło:
    Transport Problems; 2008, 3, 3; 77-81
    1896-0596
    2300-861X
    Pojawia się w:
    Transport Problems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Measurement of residual stresses of locomotive wheel treads during the manufacturing technological cycle
    Autorzy:
    Muravev, Vitaly V.
    Muraveva, Olga V.
    Volkova, Ludmila V.
    Sága, Milan
    Ságová, Zuzana
    Powiązania:
    https://bibliotekanauki.pl/articles/409953.pdf
    Data publikacji:
    2019
    Wydawca:
    STE GROUP
    Tematy:
    tread railway wheels
    acoustoelasticity
    electromagnetic acoustic transformation
    residual stresses
    Opis:
    The production of two-wheeled rolling stock represents, at first glance, a simple assembly process that significantly affects the overall functionality and safety of the vehicle. This is due to residual stresses that arise after assembly by pressing the wheel on the axle. The state of stress after assembly remains in the design has a decisive influence on the load-bearing capacity of the two-wheel drive, its lifespan but also the transfer of the pulling force in the case of locomotives. Therefore, it is very important to find suitable methods for determining residual stresses. Numerical and experimental approaches are already in place to gain information on the state of stress after compression, or during a real operation. The developed techniques and tools for estimation of residual stresses in locomotive wheel treads based on the acoustoelasticity effect using electromagnetic acoustic transformation are described in the paper. The original results of residual stress measurement in the treads during a technological cycle of locomotive wheel pair manufacturing are presented.
    Źródło:
    Management Systems in Production Engineering; 2019, 4 (27); 236-241
    2299-0461
    Pojawia się w:
    Management Systems in Production Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of Fatigue Strength Calculation Methods for Monobloc Railway Wheels
    Autorzy:
    Rakoczy, Przemysław
    Bińkowski, Robert
    Powiązania:
    https://bibliotekanauki.pl/articles/2091330.pdf
    Data publikacji:
    2021
    Wydawca:
    Instytut Kolejnictwa
    Tematy:
    monoblock railway wheels
    fatigue strength
    FEM analysis
    fatigue load
    kolejowe koła monoblokowe
    wytrzymałość zmęczeniowa
    analiza MES
    obciążenie zmęczeniowe
    Opis:
    TEN 13979-1 “Railway applications – Wheelsets and bogies – Monobloc wheels – Technical approval procedure – Part 1: Forged and rolled wheels” approves two types of calculation models for determining fatigue strength – a 3D model and a simplified axially symmetric model with an asymmetric load. Both model types vary considerably, which may affect the results to be achieved. In addition, the determination of the maximum (critical) fatigue cycle amplitude for wheels requires stresses to be analysed at a point during the complete wheel revolution. In the current EN 13979-1 procedures, the amplitude is determined in the place and in the direction with the maximum principal stress without considering changes to stresses at a point for other wheel angular positions. The paper explains methods for strength calculations of monobloc wheels acc. to EN 13979-1. Both standard-approved models for the same wheel were developed and calculated. Differences, advantages and disadvantages of each model were described and the results compared. The complete load cycle for a given point on the wheel body was also analysed and presented. The results of the above analysis were analysed and further research directions were specified to define the actual maximum fatigue load cycle amplitude in railway wheels.
    Źródło:
    Problemy Kolejnictwa; 2021, 193; 97--103
    0552-2145
    2544-9451
    Pojawia się w:
    Problemy Kolejnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Kinematics of point-to-point contact of wheels with a rails
    Kinematyka dwupunktowego kontaktu koła z szyną
    Autorzy:
    Golubenko, A.
    Sapronova, S.
    Tkacenko, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/374533.pdf
    Data publikacji:
    2007
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    układ koło-szyna
    kontakt dwupunktowy
    transport szynowy
    wheels-rails
    point-to-point contact
    railway transport
    Opis:
    The railway transport in a maximum degree is conservative. For example, the design of wheelsets, practically, has not changed for the last 150 years. Such a long life was given to this tendency by its high reliability and simplicity of the design. It is considered, that the rigid connection of wheels by means of an axis provides a self-centering of wheelset within the limits of a cross backlash of a railway. The tread contact surfaces have a difficult profile. Researches of many scientists, dealing with the questions of interaction of wheels with rails, show that the classical approach to the wheelset design leads to many problems of the railway transport. Therefore, the authors of this article strived for deeper consideration of kinematics of a movement of vehicle by a railway.
    Źródło:
    Transport Problems; 2007, 2, 3; 57-61
    1896-0596
    2300-861X
    Pojawia się w:
    Transport Problems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Specification of estimation of a passenger car ride smoothness under various exploitation conditions
    Autorzy:
    Vaičiūnas, Gediminas
    Steišūnas, Stasys
    Bureika, Gintautas
    Powiązania:
    https://bibliotekanauki.pl/articles/2038040.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
    Tematy:
    railway transport
    passenger car
    running gear
    independently rotating wheels
    Sperling's comfort index
    divergences
    numerical simulation
    software package UM
    Opis:
    The stability and smoothness of rolling stock running could be defined accurately by universal Sperling's comfort index. The divergences of variation of Sperling's comfort index of a passenger car under specific operating conditions of running gear are examining in this paper. Numerical simulations of a passenger car running with independently rotating wheels under various conditions have been performing. Gained results showed that divergences of the Sperling's comfort index variation are particularly significant due to running gear component oscillations in the horizontal plane (lateral direction). A field experiment of a passenger car with a solid (traditional) wheelset with a flat running surface proved this hypothesis. The obtained results of this experiment confirmed this assumption. Therefore, the study of the regularities of lateral oscillations of a passenger car is the logical direction of further research.
    Źródło:
    Eksploatacja i Niezawodność; 2021, 23, 4; 719-725
    1507-2711
    Pojawia się w:
    Eksploatacja i Niezawodność
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Adaptation of rail passenger car suspension parameters to independently rotating wheels
    Autorzy:
    Vaičiūnas, Gediminas
    Steišūnas, Stasys
    Bureika, Gintautas
    Powiązania:
    https://bibliotekanauki.pl/articles/2098090.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    railway
    Nadal criterion
    Sperling's comfort index
    running gear
    independently rotating wheels
    kolej
    Kryterium Nadala
    wskaźnik komfortu Sperlinga
    podwozie
    niezależnie obracające się koła
    Opis:
    This study aimed to adjust the rail passenger car running gear parameters by adapting them to independently rotating wheels. The most important aspect was the safety of the passenger car running in terms of derailment; thus, the values of the Nadal criterion were calculated first. Another aspect to consider is passenger comfort based on the values of Sperling’s comfort index according to the rail passenger car speed. The modes of suspension behaviour during operation were considered in two typical conditions: on a straight track section and on a curve with a 200-m radius. Calculations were performed using Universal Mechanism software. The results are interpreted in the paper, and the final conclusions of this study are given.
    Źródło:
    Transport Problems; 2021, 16, 1; 215--226
    1896-0596
    2300-861X
    Pojawia się w:
    Transport Problems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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