Wave attenuation in a pre-tensioned string with periodic spring supports

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F22%3A00575112" target="_blank" >RIV/68378297:_____/22:00575112 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1007/978-3-030-79325-8_23" target="_blank" >http://dx.doi.org/10.1007/978-3-030-79325-8_23</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/978-3-030-79325-8_23" target="_blank" >10.1007/978-3-030-79325-8_23</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Wave attenuation in a pre-tensioned string with periodic spring supports

Popis výsledku v původním jazyce

The overhead catenary system is a crucial conductor for delivering steady electric power to the trains running on modern electrified railways. The propagation of vibration waves in the catenary system is of interest to railway engineers due to the pantograph-catenary interaction. To explore the wave transmission via the contact wires of a catenary system supported by hanging devices offered by the bracket structures, a simplified model composed of a pre-tensioned string periodically suspended by hanging springs is adopted. For a periodic structure with wider band gaps, also known as stop bands, a wider cluster of frequencies ofwaves propagating in the periodic structure can be attenuated (or filtered out). This will be beneficial to the maintenance of the catenary system. To take advantage of such a feature, a resonator is usually equipped on each of the hanging spring supports so as to widen band gaps for better attenuation of the waves transmitted in the pre-tensioned string. In this study, a unit cell conceived as a spring-resonator-string unit is adopted to formulate the closed-form dispersion equation, from which the key condition for widening the band gaps is derived. From the exemplar study, it was shown that the installation of adjustable resonators on a catenary system can increase the band gap width, serving as a wave filter for attenuating the pantograph-induced wave transmission in the contact wires of the pantograph-catenary system.

Název v anglickém jazyce

Wave attenuation in a pre-tensioned string with periodic spring supports

Popis výsledku anglicky

The overhead catenary system is a crucial conductor for delivering steady electric power to the trains running on modern electrified railways. The propagation of vibration waves in the catenary system is of interest to railway engineers due to the pantograph-catenary interaction. To explore the wave transmission via the contact wires of a catenary system supported by hanging devices offered by the bracket structures, a simplified model composed of a pre-tensioned string periodically suspended by hanging springs is adopted. For a periodic structure with wider band gaps, also known as stop bands, a wider cluster of frequencies ofwaves propagating in the periodic structure can be attenuated (or filtered out). This will be beneficial to the maintenance of the catenary system. To take advantage of such a feature, a resonator is usually equipped on each of the hanging spring supports so as to widen band gaps for better attenuation of the waves transmitted in the pre-tensioned string. In this study, a unit cell conceived as a spring-resonator-string unit is adopted to formulate the closed-form dispersion equation, from which the key condition for widening the band gaps is derived. From the exemplar study, it was shown that the installation of adjustable resonators on a catenary system can increase the band gap width, serving as a wave filter for attenuating the pantograph-induced wave transmission in the contact wires of the pantograph-catenary system.

Druh

C - Kapitola v odborné knize

CEP obor

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OECD FORD obor

20102 - Construction engineering, Municipal and structural engineering

Projekt

<a href="/cs/project/GC17-26353J" target="_blank" >GC17-26353J: Teoretické prediktivní modely interakce proměnného a pohyblivého zatížení využitelné v monitoringu mostních konstrukcí</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název knihy nebo sborníku

Dynamics and control of advanced structures and machines

ISBN

978-3-030-79324-1

Počet stran výsledku

9

Strana od-do

265-273

Počet stran knihy

273

Název nakladatele

Springer

Místo vydání

Cham

Kód UT WoS kapitoly

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