Vibroacoustic Analysis of Cyclic Structures by Using Dof’s Size Reduction and Holographic Measurements | Zendy

Abdelkhalak El Hami | Zendy; Dan Borza | Zendy; Eduardo Souza de Cursi | Zendy

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Vibroacoustic Analysis of Cyclic Structures by Using Dof’s Size Reduction and Holographic Measurements

Author(s) -

Abdelkhalak El Hami,

Dan Borza,

Eduardo Souza de Cursi

Publication year - 2006

Publication title -

shock and vibration

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.418

H-Index - 45

eISSN - 1875-9203

pISSN - 1070-9622

DOI - 10.1155/2006/828367

Subject(s) - reduction (mathematics) , degrees of freedom (physics and chemistry) , holography , propeller , symmetry (geometry) , modal , modal analysis , data reduction , mathematics , finite element method , structural engineering , algorithm , engineering , materials science , physics , optics , geometry , composite material , statistics , quantum mechanics , marine engineering

We propose a method for the vibroacoustic analysis of structures having symmetry properties. This method is based on the reduction of the number of the degrees of freedom involved (size reduction) and the use of experimental data (confrontation numerical/experimental). We propose the extension of the method of the linear representations of finite symmetry groups to problems of coupling fluid-structure. This approach, while keeping the quality of the approximations, leads to a significant reduction of the number of degrees of freedom, with a maximal reduction for the so called repetitive structures. Finally, we present a practical case of modal analysis – in air and water – of a ship propeller formed by 3 stainless steel blades. The experimental results are obtained by using the whole-field, non-contact technique of electronic holography

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