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Memorias de investigación
Communications at congresses:
NUMERICAL PREDICTIONS OF THE NATURAL FREQUENCIES OF LONG FLEXIBLE CYLINDERS WITH A FORM OF DAMPING THAT INCLUDES THE EFFECT OF THE CURRENT
Year:2012
Research Areas
  • Mechanical aeronautics and naval engineering
Information
Abstract
We pose a quadratic eigenvalue problem (QEP) in order to study the dynamics of flexible cylinders in crossflow. A structural model based on Euler-Bernoulli equation is used together with a fluid loading model yielding to a quadratic eigenvalue problem. The problem includes a form of damping dependent not only on the structural damping itself which is in advance know to be of very small effect in this type of problems, but also on the free stream velocity and the fluid force coefficients. The fluid force model is inspired by that used by Zhou et al. in [1]. We have validated the computations given by our QEP code, against a well known experimental set of data obtained back in 2003 by Chaplin et al. [2], in which a flexible circular cylinder model was used to model the dynamics of a long flexible cylinder undergoing multimode vortex-induced vibrations (VIV). QEP computed results are in very good agreement with the experimental ones. The code allows us to conclude the effect of the flow (force coefficients and current) showing for example that the inclusion of a mean lift coefficient in the eigenvalue problem, produce no variation in its result.
International
Si
Congress
10th International Conference on Flow-Induced Vibration (& Flow-Induced Noise)
960
Place
Dublín (Irlanda)
Reviewers
Si
ISBN/ISSN
978-0-9548583-4-6
Start Date
02/07/2012
End Date
06/07/2012
From page
139
To page
145
Proceedings of the 10th International conference on Flow-Induced Vibration (& Flow-Induce Noise)
Participants
  • Autor: Leo Miguel Gonzalez Gutierrez (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: CEHINAV (Canal de Ensayos Hidrodinámicos de la E.T.S.I. Navales)
  • Departamento: Ciencias Aplicadas a la Ingeniería Naval
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