Dynamic aspects during full scale rotating bending axle tests using new generation of facilities with increased load frequency

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F25797000%3A_____%2F17%3AN0000039" target="_blank" >RIV/25797000:_____/17:N0000039 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.prostr.2017.07.003" target="_blank" >http://dx.doi.org/10.1016/j.prostr.2017.07.003</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.prostr.2017.07.003" target="_blank" >10.1016/j.prostr.2017.07.003</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Dynamic aspects during full scale rotating bending axle tests using new generation of facilities with increased load frequency

Popis výsledku v původním jazyce

According to EN 13261, EN 13103, EN 13104, rotating bending fatigue tests of full scale axles are one of the requested tests, when a new axle type, new material supplier or new manufacturer is intending to provide components for railway rolling stock. One of the test methods, how to generate the rotating bending moment, is to attach the half wheelset using the wheel to the horizontal ground base and to rotate an eccentric mass on the axle top. Such principle is used in the majority of test rigs available on the market. In the past, typical load frequency was 15 - 17 Hz. Under such conditions, only dynamic forces of the eccentric mass could be considered. However, recent design changes of the Sincotec facilities have resulted in increase of test frequencies to more than 25 30 Hz, which makes the tests significantly shorter. On the other hand, unlike the previous case, dynamic aspects of loading calibration have to be considered. A detailed example is shown and discussed. At static loading, the experimentally evaluated stresses on the axle surface corresponded to theoretical values exactly with the exception of near hub edge area, where an expected stress redistribution occurred. When the axle was loaded dynamically by rotating bending, the stress distribution on the axle surface was changed due to additional centrifugal forces of the axle itself, whereas at test frequencies around 30 Hz, such additional forces could no more be neglected. Note that the new character of load distribution cannot be always considered as optimum. Copyright (C) 2017.

Název v anglickém jazyce

Dynamic aspects during full scale rotating bending axle tests using new generation of facilities with increased load frequency

Popis výsledku anglicky

According to EN 13261, EN 13103, EN 13104, rotating bending fatigue tests of full scale axles are one of the requested tests, when a new axle type, new material supplier or new manufacturer is intending to provide components for railway rolling stock. One of the test methods, how to generate the rotating bending moment, is to attach the half wheelset using the wheel to the horizontal ground base and to rotate an eccentric mass on the axle top. Such principle is used in the majority of test rigs available on the market. In the past, typical load frequency was 15 - 17 Hz. Under such conditions, only dynamic forces of the eccentric mass could be considered. However, recent design changes of the Sincotec facilities have resulted in increase of test frequencies to more than 25 30 Hz, which makes the tests significantly shorter. On the other hand, unlike the previous case, dynamic aspects of loading calibration have to be considered. A detailed example is shown and discussed. At static loading, the experimentally evaluated stresses on the axle surface corresponded to theoretical values exactly with the exception of near hub edge area, where an expected stress redistribution occurred. When the axle was loaded dynamically by rotating bending, the stress distribution on the axle surface was changed due to additional centrifugal forces of the axle itself, whereas at test frequencies around 30 Hz, such additional forces could no more be neglected. Note that the new character of load distribution cannot be always considered as optimum. Copyright (C) 2017.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Procedia Structural Integrity

ISBN

—

ISSN

2452-3216

e-ISSN

—

Počet stran výsledku

7

Strana od-do

35-41

Název nakladatele

Elsevier B.V

Místo vydání

Amsterdam

Místo konání akce

Leoben

Datum konání akce

24. 10. 2016

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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