Numerical computation of wave characteristics in fluid–filled pipes is obtained using a Wave Finite Element method. Axisymmetric properties of the system are exploited, resulting in a very low order FE model to which theory of wave propagation in periodic structures is applied. The method takes advantage of commercial FE packages capability of modelling acoustic fluid, structure and fluid–structure interaction. The formulation leads to a general approach which is neither limited to low frequency analysis nor thin–wall theory. The method is described and illustrated by application to isotropic and laminated sandwich pipes filled with non–viscous fluid. Complex dispersion curves are presented and discussed. Results are found straightforwardly and at negligible computational cost. The method could be easily implemented in a commercial finite element code.

Wave Finite Element Analysis of Fluid-Filled Pipes / Manconi, Elisabetta; B. R., Mace; Garziera, Rinaldo. - ELETTRONICO. - (2009), pp. 1-12. (Intervento presentato al convegno NOVEM 2009 Noise and Vibration: emerging methods tenutosi a Oxford, UK nel 5-8 April 2009).

Wave Finite Element Analysis of Fluid-Filled Pipes

MANCONI, Elisabetta;GARZIERA, Rinaldo
2009-01-01

Abstract

Numerical computation of wave characteristics in fluid–filled pipes is obtained using a Wave Finite Element method. Axisymmetric properties of the system are exploited, resulting in a very low order FE model to which theory of wave propagation in periodic structures is applied. The method takes advantage of commercial FE packages capability of modelling acoustic fluid, structure and fluid–structure interaction. The formulation leads to a general approach which is neither limited to low frequency analysis nor thin–wall theory. The method is described and illustrated by application to isotropic and laminated sandwich pipes filled with non–viscous fluid. Complex dispersion curves are presented and discussed. Results are found straightforwardly and at negligible computational cost. The method could be easily implemented in a commercial finite element code.
2009
9780854329007
Wave Finite Element Analysis of Fluid-Filled Pipes / Manconi, Elisabetta; B. R., Mace; Garziera, Rinaldo. - ELETTRONICO. - (2009), pp. 1-12. (Intervento presentato al convegno NOVEM 2009 Noise and Vibration: emerging methods tenutosi a Oxford, UK nel 5-8 April 2009).
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11381/2287838
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