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Wave characterization of cylindrical and curved panels using a finite element method
Elisabetta Manconi1, Brian R Mace
1Dipartimento di Ingegneria Industriale, Universita degli Studi di Parma, Parma, Italy. elisabetta.manconi@unipr.it
The Journal of the Acoustical Society of America
|January 29, 2009
Summary
A novel wave finite element method accurately predicts wave characteristics in cylindrical and curved panels. This efficient approach combines finite elements with wave propagation theory for diverse structural constructions.
Area of Science:
- Structural mechanics
- Computational mechanics
- Acoustics
Background:
- Predicting wave propagation in structures is crucial for design.
- Existing methods may lack efficiency or accuracy for complex geometries.
- Understanding wave behavior in panels informs structural integrity and performance.
Purpose of the Study:
- To introduce a wave finite element method (WFEM) for predicting wave characteristics.
- To apply the WFEM to cylindrical and curved panels of various constructions.
- To validate the accuracy and efficiency of the proposed method.
Main Methods:
- Combines conventional finite elements with wave propagation theory for periodic structures.
- Postprocesses mass and stiffness matrices of structural segments using periodicity conditions.
- Solves an eigenproblem to obtain wavenumber and wave mode evolution with frequency.
Main Results:
- Accurate predictions of dispersion curves for isotropic, orthotropic, and laminated sandwich panels.
- Demonstrated straightforward application to complex laminated sandwich panel constructions.
- Achieved accurate results at negligible computational cost.
Conclusions:
- The WFEM is an effective tool for analyzing wave propagation in cylindrical and curved panels.
- The method offers high accuracy and computational efficiency.
- It is applicable to a wide range of structural materials and configurations.
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