Modeling of the quasi-periodic galloping response type under combined harmonic and random excitation

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F21%3A00539606" target="_blank" >RIV/68378297:_____/21:00539606 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1016/j.compstruc.2020.106478" target="_blank" >https://doi.org/10.1016/j.compstruc.2020.106478</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.compstruc.2020.106478" target="_blank" >10.1016/j.compstruc.2020.106478</a>

Result language

angličtina

Original language name

Modeling of the quasi-periodic galloping response type under combined harmonic and random excitation

Original language description

The paper presents a mathematical Single-Degree-of-Freedom model of a cable with ice accretion vibrating in an air flow. It follows an experimental investigation of several aeroelastic models in a wind tunnel. The analysis of the experimental data is very complicated because a number of structural and stream characteristics mutually interact. Distinction between deterministic and random response components is only possible using a theoretical solution. The vibrational movement of the models used can be expressed by van der Pol-Duffing type equations. The aeroelastic excitation that is due to the air flow is modeled as an additive process consisting of a deterministic periodic part and random components. The paper investigates several particular configuration parameter settings for a non-white Gaussian random part of an excitation process and characterizes corresponding response properties. The Fokker-Planck equation is constructed for the random part of the response, and its semi-analytical solution in exponential form is expressed using a probability potential. Partial amplitudes of a harmonic approximation of the response are determined using the stochastic averaging strategy. The existence of a stationary probability distribution of the response is investigated, and its stochastic stability is assessed. Open problems and further research steps are outlined.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20101 - Civil engineering

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2021

Confidentiality

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

Name of the periodical

Computers and Structures

ISSN

0045-7949

e-ISSN

1879-2243

Volume of the periodical

247

Issue of the periodical within the volume

April

Country of publishing house

GB - UNITED KINGDOM

Number of pages

11

Pages from-to

106478

UT code for WoS article

000632503100002

EID of the result in the Scopus database

2-s2.0-85101019101