Excellent lateral damping characteristics of prototypes of advanced GRP railway leaf springs in comparison with conventional steel springs

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F25797000%3A_____%2F18%3AN0000052" target="_blank" >RIV/25797000:_____/18:N0000052 - isvavai.cz</a>

Výsledek na webu

<a href="https://books.google.cz/books?id=TApmDwAAQBAJ&pg" target="_blank" >https://books.google.cz/books?id=TApmDwAAQBAJ&pg</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Excellent lateral damping characteristics of prototypes of advanced GRP railway leaf springs in comparison with conventional steel springs

Popis výsledku v původním jazyce

Lateral static and dynamic damping at 0.1 Hz and 4 Hz frequencies of lateral load, respectively, of different types of railway leaf springs have been evaluated under different vertical loads, corresponding to empty wagon, half- and fully loaded wagon. Results, distinct and clear, are very good basis for classification of springs from the viewpoint of lateral forces and damage to track. The evaluated lateral damping depended on type of spring, on wagon load and partially on frequency of the lateral load. The main results can be summarised as follows: - In case of empty wagon, parabolic spring had the highest, i.e. the most favourable damping, but just before GRP spring. - In case of half-loaded wagon, the order of springs evaluated in terms of damping changed, the GRP spring being the most favourable, followed by steel parabolic spring. Unlike the steel spring, damping of the GRP sprig increased with increasing lateral load frequency, which also is a favourable result. - At fully loaded wagon, when the damaging effects of lateral forces are generally the worst, any favourable properties of the steel parabolic spring disappear and its properties are similar to steel trapezoidal spring. However, damping of GRP springs reaches maximum values and is 4- and 5- times higher than that of steel parabolic and trapezoidal spring, respectively. The results definitely confirmed that composite GRP springs have a great potential from the viewpoint of track friendliness. Moreover, their properties are very self consistent in service from different reasons, an absence of corrosion being one of them. The results can be considered as one of important points promoting the use of GRP springs and use of GRP composites in suspensions in general in track, road and environmentally friendly vehicles.

Název v anglickém jazyce

Excellent lateral damping characteristics of prototypes of advanced GRP railway leaf springs in comparison with conventional steel springs

Popis výsledku anglicky

Lateral static and dynamic damping at 0.1 Hz and 4 Hz frequencies of lateral load, respectively, of different types of railway leaf springs have been evaluated under different vertical loads, corresponding to empty wagon, half- and fully loaded wagon. Results, distinct and clear, are very good basis for classification of springs from the viewpoint of lateral forces and damage to track. The evaluated lateral damping depended on type of spring, on wagon load and partially on frequency of the lateral load. The main results can be summarised as follows: - In case of empty wagon, parabolic spring had the highest, i.e. the most favourable damping, but just before GRP spring. - In case of half-loaded wagon, the order of springs evaluated in terms of damping changed, the GRP spring being the most favourable, followed by steel parabolic spring. Unlike the steel spring, damping of the GRP sprig increased with increasing lateral load frequency, which also is a favourable result. - At fully loaded wagon, when the damaging effects of lateral forces are generally the worst, any favourable properties of the steel parabolic spring disappear and its properties are similar to steel trapezoidal spring. However, damping of GRP springs reaches maximum values and is 4- and 5- times higher than that of steel parabolic and trapezoidal spring, respectively. The results definitely confirmed that composite GRP springs have a great potential from the viewpoint of track friendliness. Moreover, their properties are very self consistent in service from different reasons, an absence of corrosion being one of them. The results can be considered as one of important points promoting the use of GRP springs and use of GRP composites in suspensions in general in track, road and environmentally friendly vehicles.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název statě ve sborníku

ICCS 21 21st International Conference on Composite Structures

ISBN

978-88-9385-079-7

ISSN

2421-2822

e-ISSN

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Počet stran výsledku

2

Strana od-do

69-70

Název nakladatele

Societa Editrice Esculapio

Místo vydání

Bologna

Místo konání akce

Bologna

Datum konání akce

4. 9. 2018

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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