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    Wyświetlanie 1-2 z 2
    Tytuł:
    Możliwości uproszczenia procedury monitorowania hałasu tramwajowego z punktu widzenia automatyzacji procesu analitycznego
    Possibility Simplify the Procedure of Tram Noise Monitoring from Viewpoint of Automation Analytical Process
    Autorzy:
    Komorski, P.
    Czechyra, B.
    Nowakowski, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/215623.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Kolejnictwa
    Tematy:
    tramwaj
    pomiary akustyczne
    system monitorowania hałasu
    tram
    acoustic measurements
    noise monitoring system
    rail vehicles
    Opis:
    W artykule przedstawiono analizę pomiarów sygnałów akustycznych generowanych podczas testu pass-by wybranego typu lekkich pojazdów szynowych w warunkach normalnej eksploatacji. Pomiary hałasu wykonano zgodnie z wymaganiami normy ISO 3095. Celem analizy było sprawdzenie, w jakim stopniu uwzględnianie czasu przed i po przejeździe pojazdu przez punkt pomiarowy, ma wpływ na obliczanie ekspozycyjnego poziomu dźwięku A.
    The article presents the results of analysis carried out for automatization of analytical procedures for tram noise monitoring. The primary analytical procedures were developed based on the ISO 3095:2005 standard. However, it was decided to develop own research methodology. Due to, that fulfillment of all the requirements in strict urban area is impossible. The analysis of sensitivity symptom to different averaging data condition changes is presented in the comparative study. Also the possibility of its application in the vibroacoustic monitoring system of trams is proposed. There are the two main aims of the study. Firstly, checking the extent to which, the time before and after the passage of the vehicle through the measurement point, has an impact on the calculation of the exposure sound level A (SEL), on selected tram. Secondly, ensure if obtained characteristics can be considered as own, assigned to the type of vehicle. The study presents a part of research carried out in the Department of Rail Vehicles of University of Technology in Poznan, in terms of comprehensive description of the interaction of light rail vehicle – track in a highly urbanized environment. In this range, the crucial becomes an analysis of vibroacoustic activity of the tram, which is presented here.
    Źródło:
    Problemy Kolejnictwa; 2016, 170; 25-30
    0552-2145
    2544-9451
    Pojawia się w:
    Problemy Kolejnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Out-of-round tram wheels – current state and measurements
    Autorzy:
    Staśkiewicz, T.
    Firlik, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/223712.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    rail vehicles
    tram wheel
    out-of-roundness
    accelerated wear
    polygonization
    pojazdy szynowe
    koło tramwajowe
    brak okrągłości
    przyspieszone zużycie
    proces poligonizacji
    Opis:
    Railway or tram wheel is never perfectly round and its surface is not ideally smooth, even at the very moment after manufacturing. This induces dynamic interaction between wheel and rail while rolling, which may result in accelerated wear, fatigue cracking, corrugation formation (both on wheels and rails) and intensified vibroacoustic emission. This paper is an attempt of summarising the current scientific achievements concerning out-of-round (OOR) tram wheels. The gathered research may provide an introduction to the broader analysis of this issue in tram technology. However there is still very little scientific works dedicated directly to light rail vehicles such as trams. The measuring methodology of out-of-round tram wheels is also described in this article. Appropriate measurements were made on the wheels of selected vehicles operated by municipal tram company in Poznań. The obtained results allowed to learn the characteristic forms of out-of-round tram wheels, among which, several forms of polygonization (ovalization, triangularization, etc.) were observed. Therefore we confirmed the thesis, that the method of fixing tram wheel rims in the lathe has a significant effect on formation of the unevenness of its rolling surface, both when new (just after turning) and, after some mileage of use, when even small irregularities become amplified. We observed also that the amplitude values from 5th up to 10th harmonic orders were increased during the operation. The initial out-of-round shape of the wheel should be likely present on the worn wheel, but with increased amplitudes of irregularities. Wheel out-of-roundness should be identified and removed at the soonest possible state to prevent its development and generating issues in the future operation, that are for example: rolling stock and infrastructure damage, impaired comfort of passengers and city inhabitants. It makes out-of-round wheels a serious problem to cope with for the vehicle operators, which can lead even to a catastrophe.
    Źródło:
    Archives of Transport; 2018, 45, 1; 93-103
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-2 z 2

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