Experimental investigation of galloping susceptibility of U beams with different flange porosity

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F23%3A00556256" target="_blank" >RIV/68378297:_____/23:00556256 - isvavai.cz</a>

Result on the web

<a href="https://link.springer.com/chapter/10.1007/978-3-030-93236-7_17" target="_blank" >https://link.springer.com/chapter/10.1007/978-3-030-93236-7_17</a>

DOI - Digital Object Identifier

—

Result language

angličtina

Original language name

Experimental investigation of galloping susceptibility of U beams with different flange porosity

Original language description

The paper presents the outcomes from the experimental investigation of the proneness of the set of slender U-beams to thentransversal galloping. All analysed beams are geometrically identical with the U-shaped cross section given by the sidenratio equal to 2 (having the short side perpendicular to the flow) and the depth equal to 1/3rd of its breadth, but they differnin the porosity of their flanges. The prisms with six different levels of flange porosity were subjected to wind tunnel testingnin the smooth flow in order to determine their aerodynamic drag and lift coefficients for various angles of wind attack. Thensusceptibility of each individual case was assessed based on the classical quasi-steady theory. Den Hartog criterionnexpressed in the form of the slope of transversal force coefficient incorporating obtained drag and lift coefficients wasnapplied. The significant positive slope indicating the proneness to transversal galloping was determined for U-beams withnporosity up to fifty percent. The prism with flange porosity of seventy five percent revealed as a practically stable due tonlow positive value of slope within only narrow angular interval around zero angle of wind attack. Finally, the beams withnhigher flange porosities can be considered according their negative slope of transverse force coefficient as stable in termsnof galloping. The comparison with the results from the aerodynamic tests of the prisms with rectangular cross-sectionsnhaving side rations equal to two and six, which represent limiting cases for analysed U-profiles, is also given and discussednin detail.

Czech name

—

Czech description

—

Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

20101 - Civil engineering

Project

<a href="/en/project/GA19-21817S" target="_blank" >GA19-21817S: Nonholonomic interaction and dynamical stability of aeroelastic systems</a><br>

Continuities

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

Publication year

2023

Confidentiality

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

Article name in the collection

Lecture Notes in Civil Engineering

ISBN

978-3-030-93235-0

ISSN

2366-2557

e-ISSN

—

Number of pages

7

Pages from-to

183-193

Publisher name

Springer

Place of publication

Cham

Event location

Tokyo

Event date

Sep 17, 2021

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

—