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Study on integrated aerodynamic measures for improving flutter and vortex-induced vibration performance of flat steel box girders (Record no. 131822)

MARC details
000 -LEADER
fixed length control field 02485nam a2200133 4500
008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION
fixed length control field 250624b |||||||| |||| 00| 0 eng d
100 ## - MAIN ENTRY--PERSONAL NAME
Personal name Guosheng Zeng
245 ## - TITLE STATEMENT
Title Study on integrated aerodynamic measures for improving flutter and vortex-induced vibration performance of flat steel box girders
300 ## - PHYSICAL DESCRIPTION
Extent P 485-494
520 ## - SUMMARY, ETC.
Summary, etc. biblio.abstract Integrated aerodynamic measures for improving the<br/>flutter and vortex-induced vibration (VIV) performance of flat steel box girders (FBGs) were studied<br/>with a long-span suspension bridge. The critical flutter<br/>wind speed and VIV response of the FBG were first<br/>evaluated through 1 : 60 scale section model wind tunnel<br/>tests, including aerodynamic measures such as an upper<br/>central stabiliser, inner guide vanes at the maintenance<br/>vehicle tracks and horizontal stabilisers. Results indicated that adding an upper central stabiliser improved<br/>the flutter stability of the FBG but increased the VIV<br/>amplitude. Setting inner guide vanes at the maintenance<br/>vehicle tracks eliminated VIV under vertical and torsional damping ratios of 0.28% and 0.21% respectively,<br/>but significantly reduced the critical flutter wind<br/>speed. Horizontal stabilisers alone did not improve<br/>wind-induced stability. The combined use of the upper<br/>central stabiliser and guide vanes mitigated each other’s<br/>advantages: guide vanes reduced the flutter stability<br/>improvements of the upper central stabiliser, whereas<br/>the latter compromised the VIV suppression effectiveness of the guide vanes. However, a combined configuration of horizontal stabilisers, upper central stabilisers<br/>and guide vanes significantly enhanced flutter and VIV<br/>performance. The optimised section exhibited no VIV,<br/>with critical flutter wind speeds increasing by over<br/>14.8% across all angles of attack compared to the original section. Computational fluid dynamics simulations<br/>revealed that large vortex shedding in the wake region<br/>induced periodic aerodynamic forces, which primarily<br/>triggered VIV. While the upper central and horizontal<br/>stabilisers enhanced vortex shedding on the upper surface of the girder, the resulting aerodynamic forces<br/>interfered with periodic forces from wake vortex shedding, effectively suppressing VIVs.
654 ## - SUBJECT ADDED ENTRY--FACETED TOPICAL TERMS
Subject <a href="Combined aerodynamic measures">Combined aerodynamic measures</a>
-- <a href="computational fluid dynamics">computational fluid dynamics</a>
-- <a href="wind-induced stability">wind-induced stability</a>
-- <a href="wind tunnel tests">wind tunnel tests</a>
-- <a href=" flat steel box girder, flutter"> flat steel box girder, flutter</a>
-- <a href=" vortex-induced vibrations"> vortex-induced vibrations</a>
773 0# - HOST ITEM ENTRY
Host Biblionumber 125299
Host Itemnumber 112522
Title Current Science
International Standard Serial Number 0011-3891
942 ## - ADDED ENTRY ELEMENTS (KOHA)
Koha item type Journal Article
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    Dewey Decimal Classification     SNDT Juhu SNDT Juhu 24/06/2025   JP670.7 24/06/2025 24/06/2025 Journal Article