Numerical analysis of stochastic and mechanical interactions of natural modes including effects of vibration absorbers

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F20%3A00524865" target="_blank" >RIV/68378297:_____/20:00524865 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1063/5.0007827" target="_blank" >https://doi.org/10.1063/5.0007827</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/5.0007827" target="_blank" >10.1063/5.0007827</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Numerical analysis of stochastic and mechanical interactions of natural modes including effects of vibration absorbers

Popis výsledku v původním jazyce

Slender and lightweight structures, which are prone to all kinds of vibration, require vibration absorbers of various types. They are usually pendulum- or ball-type passive absorbers, which utilize the auto-parametric resonance for their damping effect. Introduction of devices of this type into the analysis increases the complexity of the computational model which in fact, consequently, propagates into complicated properties of the response. In this paper, a wind driven stochastic response of an aeroelastic structure is used to study the effects of stochastic and mechanical interactions of natural modes. The model describing the slender structure is considered to be linear self-adjoint with non-proportional damping due to both the material of the structure and the presence of a vibration absorber. Although the additive random excitation is supposed to be continuously distributed, the general (spatial) discretization procedure is able to unify the continuous and lumped mass model approaches. The presented methodology enables the study of both mechanical and stochastic interactions of individual eigenmodes which occur within the structure. On the example of a real tower it is shown that neglect of either type of interaction can lead to results which are incompatible with a real structure.

Název v anglickém jazyce

Numerical analysis of stochastic and mechanical interactions of natural modes including effects of vibration absorbers

Popis výsledku anglicky

Slender and lightweight structures, which are prone to all kinds of vibration, require vibration absorbers of various types. They are usually pendulum- or ball-type passive absorbers, which utilize the auto-parametric resonance for their damping effect. Introduction of devices of this type into the analysis increases the complexity of the computational model which in fact, consequently, propagates into complicated properties of the response. In this paper, a wind driven stochastic response of an aeroelastic structure is used to study the effects of stochastic and mechanical interactions of natural modes. The model describing the slender structure is considered to be linear self-adjoint with non-proportional damping due to both the material of the structure and the presence of a vibration absorber. Although the additive random excitation is supposed to be continuously distributed, the general (spatial) discretization procedure is able to unify the continuous and lumped mass model approaches. The presented methodology enables the study of both mechanical and stochastic interactions of individual eigenmodes which occur within the structure. On the example of a real tower it is shown that neglect of either type of interaction can lead to results which are incompatible with a real structure.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/GA19-21817S" target="_blank" >GA19-21817S: Neholonomní interakce a dynamická stabilita aeroelastických soustav</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 statě ve sborníku

AIP Conference Proceedings

ISBN

978-0-7354-1998-8

ISSN

0094-243X

e-ISSN

—

Počet stran výsledku

10

Strana od-do

020011

Název nakladatele

AIP Publishing

Místo vydání

Melville (NY)

Místo konání akce

Krakow

Datum konání akce

8. 9. 2019

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000653675000022