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Wind tunnel experiments on unstable self-excited vibration of sectional girders
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SYSNO ASEP 0422839 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Wind tunnel experiments on unstable self-excited vibration of sectional girders Author(s) Král, Radomil (UTAM-F) RID, SAI
Pospíšil, Stanislav (UTAM-F) RID, SAI, ORCID
Náprstek, Jiří (UTAM-F) RID, ORCID, SAINumber of authors 3 Source Title Journal of Fluids and Structures. - : Elsevier - ISSN 0889-9746
Roč. 44, January (2014), s. 235-250Number of pages 16 s. Publication form Print - P Language eng - English Country GB - United Kingdom Keywords flutter derivatives ; aeroelastic response ; frequency ratio tuning ; stability domain ; initial disturbance Subject RIV JM - Building Engineering R&D Projects GA103/09/0094 GA ČR - Czech Science Foundation (CSF) IAA200710902 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) ED1.1.00/02.0060 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UTAM-F - RVO:68378297 UT WOS 000336466400017 EID SCOPUS 84891626992 DOI https://doi.org/10.1016/j.jfluidstructs.2013.11.002 Annotation In this paper, a wind tunnel analysis of two degrees-of-freedom system represented by sectional girders is carried out. Besides an evaluation of the aeroelastic coefficients, the analysis is focused on the influence of the natural frequency ratio on the initiation of unstable vibration, which can be of practical interest. On the phenomenological level, the paper also discusses experimentally ascertained response regimes, with an emphasis on their stability character. The attention is paid to the memory effect in the response described by the hysteresis loop together with the separation curves determining the stability boundaries. The influence of initial disturbance on the stability is examined. Two types of cross-sections were investigated: (i) rectangular one with the aspect ratio 1:5, and (ii) bridge-like cross-section with comparable principal dimensions. Workplace Institute of Theoretical and Applied Mechanics Contact Kulawiecová Kateřina, kulawiecova@itam.cas.cz, Tel.: 225 443 285 Year of Publishing 2015 Electronic address http://www.sciencedirect.com/science/article/pii/S0889974613002466
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