Hybridization of finite element-boundary element me hods using an absorbing boundary condition for vibro-acoustic underwater noise simulations
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Estadístiques de LA Referencia / Recolecta
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/332041
Tipus de documentText en actes de congrés
Data publicació2017
EditorCIMNE
Condicions d'accésAccés obert
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Abstract
Sound propagation from industrial activities in underwater or estimation of the target
strength o waterside security systems are considered immensely important by many scientists for
both regulators of development projects or military aspects. This paper presents a
comparison of numerical methods used to model large scale acoustic coupled fluid structure
interaction underwater problems. Concerning the mechanical behavior of the structure, it is
absolutely essential during the computation of the modal basis to take into account the added mass
effect of the heavy fluid, the water, around the structure. In that work, the added mass matrix is
evaluated by a Boundary Element Method and the modal basis is computed by a sub- structuring
algorithm to deal with both large number of degrees of freedom and modes. On the acoustic point of
view, this article presents an efficient way to deal with very complex and large scale underwater
target. This method is competing against standard Perfectly Match Layers (PML), Infinite Element
Method (IEM), standard Boundary Element Method (BEM) and more recently the coupled MultiLevel Fast
Multipole Method (MLFMM). Reducing considerably both computational time and RAM requirement
keeping a very good accuracy, this approach hybridizes advantages of FEM, BEM and MLFMM methods
through a domain decomposition technic using an Adaptive Absorbing Boundary Condition (AABC). Some
numerical results are presented to present the capabilities of that approach on academic cases but
also on more
industrial applications.
CitacióZerbib, N. [et al.]. Hybridization of finite element-boundary element me hods using an absorbing boundary condition for vibro-acoustic underwater noise simulations. A: MARINE VII. "MARINE VII : proceedings of the VII International Conference on Computational Methods in Marine Engineering". CIMNE, 2017, p. 744-764. ISBN 978-84-946909-8-3.
ISBN978-84-946909-8-3
Fitxers | Descripció | Mida | Format | Visualitza |
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Marine-2017-61_HYBRIDIZATION OF FINITE ELEMENT.pdf | 1001,Kb | Visualitza/Obre |