Wave attenuation of a pre-tensioned wire with periodic spring supports subjected to a moving force

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F20%3A00537191" target="_blank" >RIV/68378297:_____/20:00537191 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1142/S0219455420710091" target="_blank" >https://doi.org/10.1142/S0219455420710091</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1142/S0219455420710091" target="_blank" >10.1142/S0219455420710091</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Wave attenuation of a pre-tensioned wire with periodic spring supports subjected to a moving force

Popis výsledku v původním jazyce

The pantograph-catenary system is essential to the operation of modern railways. The overhead catenary system serves to deliver steady electric power to the trains running on the railways. The propagation of waves in the catenary system can be significantly affected by its interaction with the pantograph. To investigate the wave transmission via the contact wires of a catenary system, a simplified model composed of a pre-Tensioned wire suspended by periodic spring supports is adopted. For a periodic structure with wider band gaps (or stop bands), a larger cluster of frequencies of the transmitting waves can be filtered out. This is beneficial to the maintenance of the catenary system as unwanted vibrations have been reduced. To widen the band gaps, a resonator can be equipped on each of the spring supports for attenuation of a wider range of transmitting waves in the pre-Tensioned wire. In this study, a unit cell conceived as the spring-resonator-wire unit is adopted to formulate the dispersion equation in closed form, from which the critical condition for widening the band gaps is derived. In addition, the moving pantograph is modeled as a moving force. From the exemplar study, it was shown that the installation of proper resonators on a catenary system can increase the gap bandwidth, such that the pantograph-induced wave transmission in the contact wires will be attenuated or filtered out.

Název v anglickém jazyce

Wave attenuation of a pre-tensioned wire with periodic spring supports subjected to a moving force

Popis výsledku anglicky

The pantograph-catenary system is essential to the operation of modern railways. The overhead catenary system serves to deliver steady electric power to the trains running on the railways. The propagation of waves in the catenary system can be significantly affected by its interaction with the pantograph. To investigate the wave transmission via the contact wires of a catenary system, a simplified model composed of a pre-Tensioned wire suspended by periodic spring supports is adopted. For a periodic structure with wider band gaps (or stop bands), a larger cluster of frequencies of the transmitting waves can be filtered out. This is beneficial to the maintenance of the catenary system as unwanted vibrations have been reduced. To widen the band gaps, a resonator can be equipped on each of the spring supports for attenuation of a wider range of transmitting waves in the pre-Tensioned wire. In this study, a unit cell conceived as the spring-resonator-wire unit is adopted to formulate the dispersion equation in closed form, from which the critical condition for widening the band gaps is derived. In addition, the moving pantograph is modeled as a moving force. From the exemplar study, it was shown that the installation of proper resonators on a catenary system can increase the gap bandwidth, such that the pantograph-induced wave transmission in the contact wires will be attenuated or filtered out.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20101 - Civil 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

2020

Kód důvěrnosti údajů

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

Název periodika

International Journal of Structural Stability and Dynamics

ISSN

0219-4554

e-ISSN

—

Svazek periodika

20

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

SG - Singapurská republika

Počet stran výsledku

12

Strana od-do

2071009

Kód UT WoS článku

000586596900015

EID výsledku v databázi Scopus

2-s2.0-85092508505