Hysteresis phenomena in transverse galloping of triangular cross-section bodies

Alonso Rodrigo, Gustavo and Sanz Lobera, Alfredo and Meseguer Ruiz, José (2012). Hysteresis phenomena in transverse galloping of triangular cross-section bodies. "Journal of Fluids And Structures", v. 33 ; pp. 243-251. ISSN 0889-9746. https://doi.org/10.1016/j.jfluidstructs.2012.04.008.

Description

Title: Hysteresis phenomena in transverse galloping of triangular cross-section bodies
Author/s:
  • Alonso Rodrigo, Gustavo
  • Sanz Lobera, Alfredo
  • Meseguer Ruiz, José
Item Type: Article
Título de Revista/Publicación: Journal of Fluids And Structures
Date: August 2012
ISSN: 0889-9746
Volume: 33
Subjects:
Freetext Keywords: Galloping; Hysteresis
Faculty: E.T.S.I. Aeronáuticos (UPM)
Department: Infraestructura, Sistemas Aeroespaciales y Aeropuertos [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Transverse galloping is a type of aeroelastic instability characterised by large amplitude, low frequency oscillation of a structure in the direction normal to the mean wind direction. It normally appears in bodies with small stiffness and structural damping, provided the incident flow velocity is high enough. In the simplest approach transverse galloping can be considered as a one-degree-of-freedom oscillator subjected to aerodynamic forces, which in turn can be described by using a quasi-steady description. In this frame it has been demonstrated that hysteresis phenomena in transverse galloping is related to the existence of inflection points in the curve giving the dependence with the angle of attack of the aerodynamic coefficient normal to the incident flow. Aiming at experimentally checking such a relationship between these inflection points and hysteresis, wind tunnel experiments have been conducted. Experiments have been restricted to isosceles triangular cross-section bodies, whose galloping behaviour is well documented. Experimental results show that, according to theoretical predictions, hysteresis takes place at the angles of attack where there are inflection points in the lift coefficient curve, provided that the body is prone to gallop at these angles of attack.

More information

Item ID: 16141
DC Identifier: http://oa.upm.es/16141/
OAI Identifier: oai:oa.upm.es:16141
DOI: 10.1016/j.jfluidstructs.2012.04.008
Official URL: http://www.sciencedirect.com/science/article/pii/S0889974612000850
Deposited by: Memoria Investigacion
Deposited on: 22 Apr 2014 18:26
Last Modified: 21 Apr 2016 16:28
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