SENSITIVITY STUDY OF THE STEEL FOOTBRIDGE RESPONSE TO THE DAMPER PARAMETERS

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F23%3APU150485" target="_blank" >RIV/00216305:26110/23:PU150485 - isvavai.cz</a>

Výsledek na webu

<a href="https://pubs.aip.org/aip/acp/article/2928/1/150039/2913340/Sensitivity-study-of-the-steel-footbridge-response?searchresult=1" target="_blank" >https://pubs.aip.org/aip/acp/article/2928/1/150039/2913340/Sensitivity-study-of-the-steel-footbridge-response?searchresult=1</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/5.0172129" target="_blank" >10.1063/5.0172129</a>

Jazyk výsledku

angličtina

Název v původním jazyce

SENSITIVITY STUDY OF THE STEEL FOOTBRIDGE RESPONSE TO THE DAMPER PARAMETERS

Popis výsledku v původním jazyce

The paper presents an optimization study of a Tuned Mass Damper (TMD) located on the structure of a steel footbridge. Lightweight bridge structures are prone to dynamic responses caused by human induced vibrations. In some cases, an TMD may be used to limit this response. The TMD is tuned to only one dominant natural frequency. In static response or when oscillating with another frequency, it only acts as an additional load. Therefore, it is necessary to find a suitable ratio of efficiency and weight of the damper. The effective modal weight of a structure is the weight of the part of the structure that oscillates in a given direction at a certain natural frequency of the structure. If we want to obtain the optimal course of the amplitude-frequency dependence, it must be tuned using the stiffness and damping parameters. The stiffness of the vibration damper is affected by the difference between the maxima of the two amplitudes. The damping of TMD affects the shape of the amplitude-frequency response so that with a small damping there is a larger drop between the peaks of the amplitudes and in the case of a damping of the structure, the two maxima merge into one larger one. In the first phase, the damper weight is calculated on the basis of a formula based on a 5% proportion of the oscillating modal mass thus determined. Stiffness and damping are also determined in this way. Subsequently, an optimization calculation of the response of the structure with variable values of vibration damper parameters was performed using the ANSYS and OptiSlang software systems. We are looking for values of vibration damper parameters for which the response value will be the smallest when the structure is loaded. The response is monitored in the form of the amplitude of the deflection of the structure in the middle of the span. For random studies the two degree of freedom model was used. The result of the study is the dependence of this value on the variability of individual input para

Název v anglickém jazyce

SENSITIVITY STUDY OF THE STEEL FOOTBRIDGE RESPONSE TO THE DAMPER PARAMETERS

Popis výsledku anglicky

The paper presents an optimization study of a Tuned Mass Damper (TMD) located on the structure of a steel footbridge. Lightweight bridge structures are prone to dynamic responses caused by human induced vibrations. In some cases, an TMD may be used to limit this response. The TMD is tuned to only one dominant natural frequency. In static response or when oscillating with another frequency, it only acts as an additional load. Therefore, it is necessary to find a suitable ratio of efficiency and weight of the damper. The effective modal weight of a structure is the weight of the part of the structure that oscillates in a given direction at a certain natural frequency of the structure. If we want to obtain the optimal course of the amplitude-frequency dependence, it must be tuned using the stiffness and damping parameters. The stiffness of the vibration damper is affected by the difference between the maxima of the two amplitudes. The damping of TMD affects the shape of the amplitude-frequency response so that with a small damping there is a larger drop between the peaks of the amplitudes and in the case of a damping of the structure, the two maxima merge into one larger one. In the first phase, the damper weight is calculated on the basis of a formula based on a 5% proportion of the oscillating modal mass thus determined. Stiffness and damping are also determined in this way. Subsequently, an optimization calculation of the response of the structure with variable values of vibration damper parameters was performed using the ANSYS and OptiSlang software systems. We are looking for values of vibration damper parameters for which the response value will be the smallest when the structure is loaded. The response is monitored in the form of the amplitude of the deflection of the structure in the middle of the span. For random studies the two degree of freedom model was used. The result of the study is the dependence of this value on the variability of individual input para

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/GA20-01734S" target="_blank" >GA20-01734S: Pravděpodobnostně orientovaná globální citlivostní měření konstrukční spolehlivosti</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název statě ve sborníku

World Multidisciplinary Civil Engineering-Architecture-Urban Planning Symposium - WMCAUS 2022

ISBN

9780735446632

ISSN

0094-243X

e-ISSN

—

Počet stran výsledku

6

Strana od-do

„150039-1“-„150039-6“

Název nakladatele

AIP Publishing

Místo vydání

neuveden

Místo konání akce

Praha

Datum konání akce

5. 9. 2022

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

—